U.S. patent application number 12/638061 was filed with the patent office on 2010-06-17 for artificial teeth.
Invention is credited to Toshihide Fujii, Yusei KADOBAYASHI.
Application Number | 20100151419 12/638061 |
Document ID | / |
Family ID | 42240976 |
Filed Date | 2010-06-17 |
United States Patent
Application |
20100151419 |
Kind Code |
A1 |
KADOBAYASHI; Yusei ; et
al. |
June 17, 2010 |
ARTIFICIAL TEETH
Abstract
The invention provides artificial teeth arranged in plates
attached in an oral cavity as a dental prosthetic appliance, in
which arrangement direction indication parts showing a directivity
of arrangement in the plates extending in an apical-cervical
direction or in a mesiodistal direction are provided at a
vestibular side or an oral side. The arrangement direction
indication parts extending in the apical-cervical direction are
positioned linearly as seen from the vestibular side in a occluded
state of mandibular teeth and maxillary teeth. The arrangement
direction indication parts extending in the mesiodistal direction
are positioned linearly as seen from the vestibular side in the
state arranged in plates. The artificial teeth are arranged at an
appropriate position according to an oral environment of each
patient, without requiring advanced skills and experiences.
Inventors: |
KADOBAYASHI; Yusei;
(Kyoto-shi, JP) ; Fujii; Toshihide; (Kyoto-shi,
JP) |
Correspondence
Address: |
WENDEROTH, LIND & PONACK, L.L.P.
1030 15th Street, N.W.,, Suite 400 East
Washington
DC
20005-1503
US
|
Family ID: |
42240976 |
Appl. No.: |
12/638061 |
Filed: |
December 15, 2009 |
Current U.S.
Class: |
433/171 |
Current CPC
Class: |
A61C 13/097 20130101;
A61C 13/10 20130101; A61C 13/12 20130101; A61C 13/08 20130101; A61C
13/01 20130101; A61C 13/0003 20130101 |
Class at
Publication: |
433/171 |
International
Class: |
A61C 13/08 20060101
A61C013/08 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 16, 2008 |
JP |
2008-319123 |
Oct 2, 2009 |
JP |
2009-230660 |
Claims
1. Artificial teeth arranged in plates attached in an oral cavity
as a dental prosthetic appliance, wherein arrangement direction
indication parts showing a directivity of arrangement in the plates
extending in an apical-cervical direction are provided at a
vestibular side or an oral side.
2. Artificial teeth arranged in plates attached in an oral cavity
as a dental prosthetic appliance, having two or more teeth to be
adjacently arranged in a mesiodistal direction, wherein arrangement
direction indication parts showing a directivity of arrangement in
the plates extending in an apical-cervical direction are provided
at a vestibular side or an oral side of the teeth, and the
arrangement direction indication parts of the teeth are extended
generally in parallel in the state arranged in the plates.
3. Artificial teeth having maxillary teeth and mandibular teeth
arranged in plates attached in an upper jaw and a lower jaw in an
oral cavity as a dental prosthetic appliance, wherein arrangement
direction indication parts showing a directivity of arrangement in
the plates extending in an apical-cervical direction are provided
at a vestibular side or an oral side of the maxillary teeth and the
mandibular teeth, and the arrangement direction indication parts of
the maxillary teeth and the mandibular teeth are positioned
generally in parallel in the state arranged in the plates.
4. The artificial teeth of claim 1, wherein a cervical side end
portion of the arrangement direction indication parts is positioned
on a maximum contour ridge line generally in parallel to the
mesiodistal direction in the state arranged in the plates.
5. The artificial teeth of claim 2, wherein the cervical side end
portion of the arrangement direction indication parts, and a
contact point of adjacent teeth in the state arranged in the plates
are positioned on a flat plane generally parallel to the
mesiodistal direction.
6. The artificial teeth of claim 3, wherein the arrangement
direction indication parts of the maxillary teeth and the
mandibular teeth are positioned linearly as seen from the
vestibular side at a central occlusion position.
7. The artificial teeth of claim 1, wherein the arrangement
direction indication parts are lateral grooves extending from an
apical side toward a cervical direction in the state arranged in
the plates.
8. The artificial teeth of claim 1, wherein the arrangement
direction indication parts are ridge lines formed by facets formed
at a mesial side and a distal side of a protruding cusp.
9. The artificial teeth of claim 1, wherein the arrangement
direction indication parts are lines formed to extend from the
apical side toward the cervical direction in the state arranged in
the plates, by coloring of the vestibular side and the oral
side.
10. Artificial teeth arranged in plates attached in an oral cavity
as a dental prosthetic appliance, wherein arrangement direction
indication parts showing a directivity of arrangement in the plates
extending in a mesiodistal direction are provided at a vestibular
side or an oral side.
11. Artificial teeth arranged in plates attached in an oral cavity
as a dental prosthetic appliance, having two or more teeth to be
adjacently arranged in a mesiodistal direction, wherein arrangement
direction indication parts showing a directivity of arrangement in
the plates extending in the mesiodistal direction are provided at a
vestibular side or an oral side of the teeth, and the arrangement
direction indication parts of the teeth are positioned generally in
parallel in the state arranged in the plates.
12. Artificial teeth having maxillary teeth and the mandibular
teeth arranged in plates attached in an upper jaw and a lower jaw
in an oral cavity as a dental prosthetic appliance, wherein
arrangement direction indication parts showing a directivity of
arrangement in the plates extending in a mesiodistal direction are
provided at a vestibular side or an oral side of the maxillary
teeth and the mandibular teeth, and the arrangement direction
indication parts of the maxillary teeth and the mandibular teeth
are extended generally in parallel in the state arranged in the
plates.
13. The artificial teeth of claim 10, wherein the arrangement
direction indication parts are positioned on a maximum contour
ridge line generally parallel to the mesiodistal direction in the
state arranged in the plates.
14. The artificial teeth of claim 11, wherein the arrangement
direction indication parts are positioned linearly as seen from the
vestibular side in the state arranged in the plates.
15. An arrangement confirmation sheet for confirming an arrangement
state of artificial teeth having arrangement direction indication
parts showing a directivity of arrangement in plates extending in
an apical-cervical direction or a mesiodistal direction, provided
on a vestibular side or an oral side, wherein confirm lines
overlapping with the arrangement direction indication parts in a
normal arrangement state are provided in a base sheet through which
a back side can be seen.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to artificial teeth which can
be arranged easily when making a dental prosthetic appliance and
are easy in mastication when wearing it as dentures.
[0003] 2. Description of the Related Art
[0004] Arrangement of artificial molar teeth when making a dental
prosthetic appliance required advanced skills and experiences. In
particular, it was difficult to arrange the adjacent teeth in an
appropriate positional relation. Specifically, in dentures, the
artificial teeth to be arranged in six degrees of freedom (position
and angle) must be arranged at specified positions, and the
dentures must be made for individual patients. It was, however,
extremely difficult to arrange the teeth in specified positions to
the upper and lower jaws, or arrange the adjacent teeth in
specified positions. In conventional artificial teeth, accordingly,
in order to obtain an ideal mastication, it was required to grind
largely after the arrangement, or change a surface condition
largely.
[0005] JP-A-2002-177301 discloses artificial molar teeth in which a
lingual cusp, a buccal cusp, and a fossa are formed on the occlusal
surface of upper molar teeth, and a lingual cusp, a buccal cusp,
and a fossa are formed on the occlusal surface of lower antagonist
molar teeth. In these artificial molar teeth, at the central
occlusal position, the upper molar teeth and the lower antagonist
molar teeth are configured so that the lingual cusp of the upper
molar teeth may occlude and contact with the fossa of the lower
antagonist molar teeth, and that the buccal cusp of the lower
antagonist molar teeth may occlude and contact with the fossa of
the upper molar teeth.
[0006] In the artificial molar teeth of JP-A-2002-177301, when
making the dentures, it is easy to arrange in the wax alveolar
ridge and adjust the occlusion by grinding or the like. Also when
using the dentures, the dentures are stable without being inverted.
In the masticatory efficiency including grinding, chewing, and
cutting of food, an occlusion close to a full balanced occlusion is
obtained. It is also easy to change to a lingualized occlusion not
only when making the dentures but also when correcting the
dentures.
[0007] However, in the artificial molar teeth of JP-A-2002-177301,
since the positions of the cusp and the fossa of antagonist molar
teeth are limited, and it is hard to identify the positions of the
cusp and the fossa at the time of arrangement, the artificial teeth
cannot be easily arranged in normal arrangement positions. As a
result, a normal mastication may not be obtained, and adjustment by
grinding or the like after arrangement may be needed.
SUMMARY OF THE INVENTION
[0008] It is an object of the present invention to provide
artificial molar teeth that can be adjusted at appropriate
positions according to the oral cavity environment of each patient,
without requiring advanced skills and experiences.
[0009] To achieve the above object, first artificial teeth of the
present invention are configured such that artificial teeth
arranged in plates attached in an oral cavity as a dental
prosthetic appliance, wherein arrangement direction indication
parts showing a directivity of arrangement in the plates extending
in an apical-cervical direction are provided at a vestibular side
or an oral side.
[0010] These artificial teeth are artificial teeth arranged in
plates attached in an oral cavity as a dental prosthetic appliance,
having two or more teeth to be adjacently arranged in a mesiodistal
direction, wherein arrangement direction indication parts showing a
directivity of arrangement in the plates extending in an
apical-cervical direction are provided at a vestibular side or an
oral side of the teeth, and the arrangement direction indication
parts of the teeth are extended generally in parallel in the state
arranged in the plates.
[0011] Alternatively, these artificial teeth are artificial teeth
having maxillary teeth and mandibular teeth arranged in plates
attached in an upper jaw and a lower jaw in an oral cavity as a
dental prosthetic appliance, wherein arrangement direction
indication parts showing a directivity of arrangement in the plates
extending in an apical-cervical direction are provided at a
vestibular side or an oral side of the maxillary teeth and the
mandibular teeth, and the arrangement direction indication parts of
the maxillary teeth and the mandibular teeth are positioned
generally in parallel in the state arranged in the plates.
[0012] In a completed state, the plate of the dentures is made of
resin. This resin-made plate is formed in place of wax rim of a
temporary plate after arrangement of artificial teeth. In the
specification herein, therefore, "when arranging on the plate"
means specifically "when arranging on the wax rim of the temporary
plate."
[0013] Since the first artificial teeth have arrangement direction
indication parts extending in the apical-cervical direction, when
the teeth are arranged adjacently in a mesiodistal direction, the
teeth can be arranged in a specified direction only by arranging so
that each arrangement direction indication part may be extended in
parallel. Similarly, when arranging the maxillary teeth and
mandibular teeth up and down, only by arranging so that each
arrangement direction indication part may be positioned in
parallel, the teeth can be arranged in a specified direction.
Therefore, the teeth may be adjusted and arranged in specified
positions without requiring advanced skills and experiences.
[0014] These artificial teeth are preferably configured such that a
cervical side end portion of the arrangement direction indication
parts is positioned on a maximum contour ridge line generally in
parallel to the mesiodistal direction in the state arranged in the
plates. Thus, when arranging adjacent teeth, the position in the
apical-cervical direction can be adjusted easily without requiring
advanced skills and experiences.
[0015] In view of arranging the teeth adjacently in the mesiodistal
direction, the cervical side end portion of the arrangement
direction indication parts and a contact point of adjacent teeth in
the state arranged in the plates are preferably positioned on a
flat plane generally parallel to the mesiodistal direction. Thus,
similarly to the above, when arranging the adjacent teeth, the
position in the apical-cervical direction can be adjusted easily
without requiring advanced skills and experiences.
[0016] In view of arranging the teeth up and down, the arrangement
direction indication parts of the maxillary teeth and the
mandibular teeth are preferably positioned linearly as seen from
the vestibular side at a central occlusion position. Thus, when
arranging the upper and lower occlusal teeth, the position in the
mesiodistal direction can be adjusted easily without requiring
advanced skills and experiences.
[0017] The arrangement direction indication parts of these
artificial teeth are lateral grooves extending from an apical side
toward a cervical direction in the state arranged in the
plates.
[0018] The arrangement direction indication parts are ridge lines
formed by facets formed at a mesial side and a distal side of a
protruding cusp.
[0019] The arrangement direction indication parts are lines formed
to extend from the apical side toward the cervical direction in the
state arranged in the plates, by coloring of the vestibular side
and the oral side.
[0020] The second artificial teeth of the present invention are
configured such that artificial teeth arranged in plates attached
in an oral cavity as a dental prosthetic appliance, wherein
arrangement direction indication parts showing a directivity of
arrangement in the plates extending in a mesiodistal direction are
provided at a vestibular side or an oral side.
[0021] These artificial teeth are artificial teeth arranged in
plates attached in an oral cavity as a dental prosthetic appliance,
having two or more teeth to be adjacently arranged in a mesiodistal
direction, wherein arrangement direction indication parts showing a
directivity of arrangement in the plates extending in the
mesiodistal direction are provided at a vestibular side or an oral
side of the teeth, and the arrangement direction indication parts
of the teeth are positioned generally in parallel in the state
arranged in the plates.
[0022] Alternatively, these artificial teeth are artificial teeth
having maxillary teeth and the mandibular teeth arranged in plates
attached in an upper jaw and a lower jaw in an oral cavity as a
dental prosthetic appliance, wherein arrangement direction
indication parts showing a directivity of arrangement in the plates
extending in a mesiodistal direction are provided at a vestibular
side or an oral side of the maxillary teeth and the mandibular
teeth, and the arrangement direction indication parts of the
maxillary teeth and the mandibular teeth are extended generally in
parallel in the state arranged in the plates.
[0023] Since the second artificial teeth have arrangement direction
indication parts extending in the mesiodistal direction, when the
teeth are arranged adjacently in the mesiodistal direction, the
teeth can be arrange in a specified direction only by arranging so
that each arrangement direction indication part may be positioned
in parallel. Similarly, when arranging the maxillary teeth and
mandibular teeth up and down, only by arranging so that each
arrangement direction indication part may be extended in parallel,
the teeth can be arranged in a specified direction. Therefore, the
teeth may be adjusted and arranged in specified positions without
requiring advanced skills and experiences.
[0024] These artificial teeth are preferably configured such that
the arrangement direction indication parts are positioned on a
maximum contour ridge line generally parallel to the mesiodistal
direction in the state arranged in the plates. Thus, without
requiring advanced skills and experiences, only by arranging the
teeth so that each arrangement direction indication part may be
continuous and linear, when arranging the adjacent teeth, the
position in the apical-cervical direction can be adjusted
easily.
[0025] In view of arranging the teeth adjacently in the mesiodistal
direction, the arrangement direction indication parts are
preferably positioned linearly as seen from the vestibular side in
the state arranged in the plates. Thus, similarly to the above,
when arranging the adjacent teeth, the position in the
apical-cervical direction can be adjusted easily without requiring
advanced skills and experiences.
[0026] As described above, in the artificial teeth having the
arrangement direction indication parts showing the directivity of
the arrangement in the plates extending in the apical-cervical
direction or the mesiodistal direction, provided on the vestibular
side or the oral side, as an arrangement confirmation sheet for
confirming an arrangement state, it is preferred that confirm lines
overlapping with the arrangement direction indication parts in a
normal arrangement state be provided in a base sheet through which
a back side can be seen.
[0027] Thus, with the teeth arranged on the maxillary plate and the
mandibular plate, only by positioning the arrangement confirmation
sheets to the vestibular lateral surface or the oral lateral
surface, it can be easily checked whether the teeth are arranged in
normal state or not. If there is an error in arrangement, it can be
adjusted easily. The teeth may be arranged easily without requiring
advanced skills and experiences.
[0028] According to the artificial teeth of the present invention,
since the arrangement direction indication parts are extended in
the apical-cervical direction or the mesiodistal direction, when
arranging the teeth adjacently in the mesiodistal direction, or
when arranging the maxillary teeth and mandibular teeth up and
down, the teeth can be adjusted and arranged in the specified
arrangement direction without requiring advanced skills and
experiences.
BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Further objects and advantages of the present invention will
become clear from the following description taken in conjunction
with the preferred embodiments thereof with reference to the
accompanying drawings, in which:
[0030] FIG. 1 is a plan view showing a basic configuration of
artificial molar teeth to be arranged in the upper jaw and lower
jaw;
[0031] FIG. 2 is a plan view of upper molar teeth and lower molar
teeth arranged and positioned up and down;
[0032] FIG. 3 is a buccal side view showing an up-and-down arranged
state of upper molar teeth and lower molar teeth in a first
embodiment;
[0033] FIG. 4 is a perspective view of state of molar teeth
arranged along arrangement direction indication lines in a second
embodiment;
[0034] FIG. 5 is a plan view for explaining the forming concept of
arrangement direction indication lines in the second
embodiment;
[0035] FIG. 6 is a vestibular side view showing a state of
maxillary teeth and mandibular teeth arranged in a row respectively
in a third embodiment;
[0036] FIG. 7 is a vestibular side view showing an overlapped state
of the maxillary teeth and mandibular teeth in the third
embodiment;
[0037] FIG. 8 is a vestibular side view showing a state of the
maxillary teeth and mandibular teeth arranged in a row respectively
in a fourth embodiment;
[0038] FIGS. 9A and 9B are vestibular side views showing an
arrangement checking method of maxillary teeth in the fourth
embodiment; and
[0039] FIGS. 10A and 10B are vestibular side views showing an
arrangement checking method of mandibular teeth in the fourth
embodiment.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0040] An embodiment of the present invention is described with
reference to the accompanying drawings.
[0041] The present invention relates to techniques of making
artificial teeth as a dental prosthetic appliance of denture. A
first embodiment relates to techniques to be used in making
artificial molar teeth. The artificial molar teeth include a first
molar tooth, a second molar tooth, a first premolar tooth, and a
second premolar tooth, and preferably two or more adjacent teeth
thereof may be combined, and more preferably all four adjacent
teeth may be combined. Moreover, four teeth including upper and
lower mutually opposing antagonist first molar teeth, antagonist
second molar teeth, antagonist first premolar teeth, and antagonist
second premolar teeth are preferred, and more preferably eight
teeth of all upper and lower opposing molar teeth may be
combined.
[0042] In the following description, a direction approaching
anterior teeth is called a mesial side, and an opposite departing
direction is called a distal side. In addition, the inside of an
oral cavity is called a lingual side and a palatine side (oral
side), and the outside of the oral cavity is called a buccal side
and a labial side (vestibular side). The occlusal surface side of
teeth is called a cuspal side (apical side), and a tooth root side
is called a cervical side. FIGS. 1 and 2, which will be referred to
in the following description, show a basic configuration of
artificial molar teeth, in which the outline profile thereof or the
like is adjusted according to each patient. The broken line in FIG.
2 shows the ridge of each molar tooth, and the inside is the
occlusal plane, and the outside is the outer circumference.
[0043] FIG. 1 shows artificial teeth using artificial molar teeth
in a first embodiment of the present invention. The artificial
molar teeth include a mandibular first molar tooth 1, a mandibular
second molar tooth 2, a mandibular first premolar tooth 3, and a
mandibular second premolar tooth 4 arranged in the lower jaw, and
an maxillary first molar tooth 5, an maxillary second molar tooth
6, an maxillary first premolar tooth 7, and an maxillary second
premolar tooth 8 arranged in the opposed upper jaw. The lower molar
teeth 1 to 4 are arranged in a mandibular plate 9, and the upper
molar teeth 5 to 8 are arranged in a maxillary plate 10, and they
are detachably attached in the oral cavity of the patient through
these plates 9, 10. The mandibular plate 9 is formed in a generally
U-shape for allowing to project the tongue of the patient.
[0044] FIG. 2 shows the relation of the lower molar teeth 1 to 4
and the upper molar teeth 5 to 8 arranged on the plates 9, 10 as
seen from the maxillary direction in the present embodiment. The
upper side is a view of the upper molar teeth 5 to 8 as seen from
the maxillary direction, and the lower side is a view of the lower
molar teeth 1 to 4 as seen from the maxillary direction. However,
since the occlusion state of the upper jaw is not known when seen
from the maxillary direction, in order to show the state of
occlusion, the occlusal surface as seen from above is shown. In the
drawing, a circle "O" mark shows the cusp point of each cusp.
[0045] As shown in the figure, the mandibular first molar tooth 1
is provided with a mesial buccal cusp 11 at the mesial side of the
buccal side, a distal buccal cusp 12 at the distal side of the
buccal side, a mesial lingual cusp 13 at the mesial side of the
lingual side, and a distal lingual cusp 14 at the distal side of
the lingual side. This mandibular first molar tooth 1 may be
further provided with one cusp at the distal side. These cusps 11
to 14 are lumps of tooth substance formed in a shape raised like a
taper. The mandibular first molar tooth 1 has a central groove 15
extending in the mesiodistal direction formed between each pair of
the buccal cusps 11, 12 and the lingual cusps 13, 14. At a
specified position on the central groove 15, a central fossa 16 is
formed, which reaches the maximum depth in the vertical direction
in the arranged state. The mandibular first molar tooth 1 is also
provided with a buccal groove 17 and a lingual groove 18 provided
between each pair of the mesial cusps 11, 13 and the distal cusps
12, 14. These grooves 17, 18 are large grooves extending from the
central groove 15 and the central fossa 16 to the buccal face and
the lingual face, and they are extended from the cuspal side to the
cervical side on the buccal face and the lingual face.
[0046] The mandibular second molar tooth 2 is provided with a
mesial buccal cusp 19 at the mesial side of the buccal side, a
distal buccal cusp 20 at the distal side of the buccal side, a
mesial lingual cusp 21 at the mesial side of the lingual side, and
a distal lingual cusp 22 at the distal side of the lingual side.
These cusps 19 to 22 are lumps of tooth substance formed in a shape
raised like a taper. The mandibular second molar tooth 2 has a
central groove 23 extending in the mesiodistal direction formed
between each pair of the buccal cusps 19, 20 and the lingual cusps
21, 22. At a specified position on the central groove 23, a central
fossa 24 is formed. Further, the mandibular second molar tooth 2 is
also provided with a buccal groove 25 and a lingual groove 26,
similarly to those in the mandibular first molar tooth 1, formed
between each pair of the mesial cusps 19, 21 and the distal cusps
20, 22.
[0047] The mandibular first premolar tooth 3 is provided with one
buccal cusp 27 at the buccal side, and one lingual cusp 28 at the
lingual side. These cusps 27 and 28 are lumps of tooth substance
formed in a shape raised like a taper. The mandibular first
premolar tooth 3 has a central groove 29 extending in the
mesiodistal direction formed between the buccal cusps 27, 28, and a
fossa 30 is formed at a specified position on this central groove
29.
[0048] The mandibular second premolar tooth 4 is provided with one
buccal cusp 31 at the buccal side, and one lingual cusp 32 at the
lingual side. These cusps 31 and 32 are lumps of tooth substance
formed in a shape raised like a taper. The mandibular second
premolar tooth 4 has a central groove 33 extending in the
mesiodistal direction formed between the buccal cusps 31, 32, and a
fossa 34 is formed at a specified position on this central groove
33.
[0049] In these mandibular premolar teeth 3, 4, buccal grooves 17,
or lingual grooves 18, 26 are not formed, as in the mandibular
molar teeth 1, 2. However, when the pair of premolar teeth 3, 4 are
made as connected teeth, a lateral groove such as lingual groove or
buccal groove is formed in the connected portion. Hence, the
lateral groove formed in the connected teeth is configured like the
buccal grooves 17, 25 and the lingual grooves 18, 26 of the molar
teeth 1, 2.
[0050] On the other hand, the maxillary first molar tooth 5 is
provided with a mesial buccal cusp 35 at the mesial side of the
buccal side, a distal buccal cusp 36 at the distal side of the
buccal side, a mesial lingual cusp 37 at the mesial side of the
lingual side, and a distal lingual cusp 38 at the distal side of
the lingual side. These cusps 35 to 38 are lumps of tooth substance
formed in a shape raised like a taper. The maxillary first molar
tooth 5 has a central groove 39 extending in the mesiodistal
direction formed between each pair of the buccal cusps 35, 36 and
the lingual cusps 37, 38, and a central fossa 40 is formed at a
specified position on the central groove 39. The maxillary first
molar tooth 5 is also provided with a buccal groove 41 and a
lingual groove 42 provided between each pair of the mesial cusps
35, 37 and the distal cusps 36, 38, similarly to those in the
mandibular molar teeth 1, 2.
[0051] The maxillary second molar tooth 6 is provided with a mesial
buccal cusp 43 at the mesial side of the buccal side, a distal
buccal cusp 44 at the distal side of the buccal side, a mesial
lingual cusp 45 at the mesial side of the lingual side, and a
distal lingual cusp 46 at the distal side of the lingual side.
These cusps 43 to 46 are lumps of tooth substance formed in a shape
raised like a taper. The maxillary second molar tooth 6 has a
central groove 47 extending in the mesiodistal direction formed
between each pair of the buccal cusps 43, 44 and the lingual cusps
45, 46, and at a specified position on the central groove 47, a
central fossa 48 is formed. Further, the maxillary second molar
tooth 6 is also provided with a buccal groove 49 and a lingual
groove 50, similarly to those in the molar teeth 1, 2, 5, formed
between each pair of the mesial cusps 43, 45 and the distal cusps
44, 46.
[0052] The maxillary first premolar tooth 7 is provided with one
buccal cusp 51 at the buccal side, and one lingual cusp 52 at the
lingual side. These cusps 51 and 52 are lumps of tooth substance
formed in a shape raised like a taper. The maxillary first premolar
tooth 7 has a central groove 53 extending in the mesiodistal
direction formed between the buccal cusps 51, 52, and a fossa 54 is
formed at a specified position on this central groove 53.
[0053] The maxillary second premolar tooth 8 is provided with one
buccal cusp 55 at the buccal side, and one lingual cusp 56 at the
lingual side. These cusps 55 and 56 are lumps of tooth substance
formed in a shape raised like a taper. The maxillary second
premolar tooth 8 has a central groove 57 extending in the
mesiodistal direction formed between the buccal cusps 55, 56, and a
fossa 58 is formed at a specified position on this central groove
57.
[0054] In these maxillary premolar teeth 7, 8, as in the mandibular
premolar teeth 3, 4, buccal grooves 41, 49 or lingual grooves 42,
50 are not formed, as in the maxillary molar teeth 5, 6. However,
when the pair of premolar teeth 7, 8 are made as connected teeth,
the lateral groove formed in the connection portion is configured
like the buccal grooves 41, 49 and the lingual grooves 42, 50 of
the molar teeth 5,6.
[0055] These molar teeth 1 to 8 have a curved surface on the outer
circumference. Out of the outer circumference, as indicated by a
single-dot chain line in FIG. 3, the most swollen and bulged
portion of the molar teeth 1 to 8 in the arranged state forms a
maximum contour ridge line 59. This maximum contour ridge line 59
consists of a peak of bulged curved surface, and is not a visually
recognized linear form. The maximum contour ridge line 59 of the
present embodiment is formed to be generally parallel and linear in
the mesiodistal direction when seen from the buccal side of the
molar teeth 1 to 8. Each maximum contour ridge line 59 of the molar
teeth 1 to 4, 5 to 8 is provided so as to coincide in the height in
the cuspal-cervical direction, so as to be positioned linearly to
the mesiodistal direction when seen from the buccal side.
[0056] When the molar teeth 1 to 4, 5 to 8 having such maximum
contour ridge lines 59 are arranged in the plates 9, 10, one point
on the maximum contour ridge line 59 among the adjacent surfaces of
the adjacent teeth 1 to 4, 5 to 8 contacts with each other. In
other words, the molar teeth 1 to 4, 5 to 8 are formed and arranged
in the curved surface shape so that one point on the maximum
contour ridge line 59 may be contact point 60.
[0057] In the embodiment, the buccal grooves 17, 25, 41, 49 and the
lingual grooves 18, 26, 42, 50 of the molar teeth 1, 2, 5, 6 are
configured so that the end portion of the cervical side may be
positioned on the maximum contour ridge line 59. Specifically, the
buccal grooves 17, 25, 41, 49 and lingual grooves 18, 26, 42, 50
are extended from the occlusal surface to the buccal side and the
lingual side in a state arranged in the plates 9, 10, and are
formed to extend in the cuspal-cervical direction toward the
maximum contour ridge line 59 at the buccal side and the lingual
side. As a result, the cervical side end portions of the buccal
grooves 17, 25, 41, 49 and lingual grooves 18, 26, 42, 50 are
configured to be on a plane generally parallel to the mesiodistal
direction with the contact point 60 with the adjacent teeth in the
arranged state. The buccal grooves 17, 25, 41, 49 are provided
generally in parallel as seen from the buccal side in a
three-dimensionally manner, and the lingual grooves 18, 26, 42, 50
are provided generally in parallel as seen from the lingual side.
Hence, the buccal grooves 17, 25 of the mandibular molar teeth 1, 2
are positioned in parallel to the buccal grooves 41, 49 of the
maxillary molar teeth 5, 6, and the lingual grooves 18, 26 of the
mandibular molar teeth 1, 2 are positioned in parallel to the
lingual grooves 42, 50 of the maxillary molar teeth. The buccal
grooves 17, 25, 41, 49 and lingual grooves 18, 26, 42, 50
positioned at the buccal side and the lingual side may be curved in
a side view as long as they are extended in parallel, but are
preferred to be linear extending in the cuspal-cervical direction
in a side view.
[0058] The molar teeth 1 to 4, 5 to 8 are indicated by gray shading
in FIGS. 1 and 3, in which an embrasure 61 formed of hourglass or
shoulder-drum shaped gaps (space) is formed between adjacent teeth
in the state arranged in the plates 9, 10. As shown in FIG. 3, this
embrasure 61 is divided into a cusp embrasure 61a positioned at the
cuspal side from the contact point 60, and a cervical embrasure 61b
positioned at the cervical side from the contact point 60.
Accordingly, when the molar teeth 1 to 4, 5 to 8 are arranged, in a
buccal side view, the bottom (depth) of the cusp embrasure 61a
coincides with the maximum contour ridge line 59. That is, the
depth of the cusp embrasure 61a is configured so that the height in
the cuspal-cervical direction may coincide in the mesiodistal
direction with the cervical side end portions of the buccal grooves
17, 25, 41, 49 and lingual grooves 18, 26, 42, 50.
[0059] In the molar teeth 1 to 4, 5 to 8 thus composed, the
extending direction of the buccal grooves 17, 25, 41, 49 and
lingual grooves 18, 26, 42, 50 is used as an arrangement direction
indication part for instructing the direction of arrangement in
line and in parallel. The cervical side end portions of the buccal
grooves 17, 25, 41, 49 and the lingual grooves 18, 26, 42, 50, and
the maximum contour ridge line 59 including the contact point 60
are used as an arrangement direction indication part for
instructing the arrangement direction (position) in the
cuspal-cervical direction between adjacent teeth.
[0060] A description is given below of an operation of arranging
the molar teeth 1 to 8 having the above configuration in the plates
9, 10.
[0061] In the completed dentures, the plates 9, 10 are made of
resin. The resin-made plates are formed in place of the wax rims as
temporary plates after arrangement of artificial teeth. More
specifically, the wax rims are made of wax as temporary plates from
patterns taken from a patient, and the artificial teeth are
arranged in the wax rims to make temporary dentures. The temporary
dentures are covered with plaster, and the wax rim is melted away,
and the resin is injected, so that resin-made plates 9, 10 are
formed, and the completed dentures are taken out from the
plaster.
[0062] First, in the mandibular plate 9 arranged with a lower
central incisor 62, a lower lateral incisor 63, and a lower canine
64, the mandibular first premolar tooth 3 is arranged at the distal
side of the lower canine 64. At this time, the mandibular first
premolar tooth 3 is arranged so that the contact point 60 contacts
with the lower canine 64 and the height of the peak of the cusps
27, 28 may coincide with that of the top of the lower canine 64 in
the apical-cervical direction.
[0063] Next, the mandibular second premolar tooth 4 is arranged in
the mandibular plate 9. At this time, the positions of the cusps
31, 32 of the mandibular second premolar tooth 4 in the
buccal-lingual direction are arranged to correspond to the cusps
27, 28 of the mandibular first premolar tooth 3. The mandibular
second premolar tooth 4 is arranged with respect to the mandibular
first premolar tooth 3 so that the heights in the cuspal-cervical
direction of the mutual maximum contour ridge lines 59, 59 coincide
with each other and the mutual contact points 60, 60 contact with
each other.
[0064] The mandibular first molar tooth 1 is arranged next in the
mandibular plate 9. At this time, the positions of the buccal cusps
11, 12 and the lingual cusps 13, 14 of the mandibular first molar
tooth 1 in the buccal-lingual direction are arranged to correspond
to the buccal cusp 31 and the lingual cusp 32 of the mandibular
second premolar tooth 4. The mandibular first molar tooth 1 is
arranged with respect to the mandibular second premolar tooth 4 so
that the height in the cuspal-cervical direction of the mutual
maximum contour ridge lines 59, 59 may coincide with each other.
The cervical side end portion of the buccal groove 17 or lingual
groove 18, the mesial side contact point 60 of the mandibular first
molar tooth 1, and the contact point 60 of the adjacently arranged
mandibular premolar teeth 3,4 are arranged so as to be positioned
at the height in each cuspal-cervical direction linearly in the
mesiodistal direction.
[0065] Next, the mandibular second molar tooth 2 is arranged in the
mandibular plate 9. At this time, the positions of the buccal cusps
19, and the lingual cusps 21, 22 of the mandibular second molar
tooth 2 in the buccal-lingual direction are arranged to correspond
to the buccal cusps 11, 12 and the lingual cusps 13,14 of the
mandibular first molar tooth 1. The mandibular second molar tooth 2
is arranged with respect to the mandibular first molar tooth 1 so
that the buccal groove 25 and the lingual groove 26 are positioned
in parallel to the buccal groove 17 and the lingual groove 18 of
the mandibular first molar tooth 1, and the heights in the
cuspal-cervical direction of the mutual maximum contour ridge lines
59, 59 coincide with each other. The cervical side end portions of
the buccal groove 25 and the lingual groove 26 and the mesial side
contact point 60 of the mandibular second molar tooth 2 and the
cervical side end portions of the buccal groove 17 and the lingual
groove 18 of the adjacently arranged mandibular first molar tooth 1
are arranged so that the heights in each cuspal-cervical direction
of them are positioned linearly in the mesiodistal direction.
[0066] Similarly, the maxillary first premolar tooth 7 is arranged
in the maxillary plate 10 arranged with an upper central incisor
65, an upper lateral incisor 66, and an upper canine 67. At this
time, the maxillary first premolar tooth 7 is arranged so that the
contact point 60 contacts with the upper canine 60 and the heights
of the peaks of the cusps 51, 52 may coincide with that of the apex
of the upper canine 67 in the apical-cervical direction.
[0067] The maxillary second premolar tooth 8 is arranged in the
maxillary plate 10. At this time, the positions of the cusps 55, 56
of the maxillary second premolar tooth 8 in the buccal-lingual
direction are arranged to correspond to the cusps 51, 52 of the
maxillary first premolar tooth 7. The maxillary second premolar
tooth 8 is arranged with respect to the maxillary first premolar
tooth 7 so that the heights of mutual maximum contour ridge lines
59, 59 coincide with each other in the cuspal-cervical direction,
and the mutual contact points 60, 60 contact with each other.
[0068] The maxillary first molar tooth 5 is arranged in the
maxillary plate 10. At this time, the positions of the buccal cusps
35, 36 and the lingual cusps 37, 38 of the maxillary first molar
tooth 5 in the buccal-lingual direction are arranged to correspond
to the buccal cusp 55 and the lingual cusp 56 of the maxillary
second premolar tooth 8. The maxillary first molar tooth 5 is
arranged with respect to the maxillary second premolar tooth 8 so
that the mutual maximum contour ridge lines 59, 59 coincide with
each other in the cuspal-cervical direction. The cervical side end
portion of the buccal groove 41 or the lingual groove 42 and the
mesial side contact point 60 of the maxillary first molar tooth 5,
and the contact points 60 of the adjacently arranged maxillary
premolar teeth 5, 6 are arranged so as to coincide in the height in
each cuspal-cervical direction linearly in the mesiodistal
direction.
[0069] Finally, the maxillary second molar tooth 6 is arranged in
the maxillary plate 10. At this time, the positions of the buccal
cusps 43, 44 and the lingual cusps 45, 46 of the maxillary second
molar tooth 6 in the buccal-lingual direction are arranged to
correspond to the buccal cusps 35, 36 and the lingual cusps 37, 38
of the maxillary first molar tooth 5. The maxillary second molar
tooth 6 is arranged with respect to the maxillary first molar tooth
5 so that the buccal groove 49 and the lingual groove 50 are
positioned in parallel to the buccal groove 41 and the lingual
groove 42 of the maxillary first molar tooth 5 and the height in
the cuspal-cervical direction of the mutual maximum contour ridge
lines 59, 59 may coincide with each other. The cervical side end
portion of the buccal groove 49 or the lingual groove 50 of the
maxillary second molar tooth 6, and the mesial side contact point
60, and the cervical side end portion of the buccal groove 41 or
the lingual groove 42 of the adjacently arranged maxillary first
molar tooth 5 are arranged so that the heights in each
cuspal-cervical direction of them are positioned linearly in the
mesiodistal direction.
[0070] Incidentally, when the mandibular premolar teeth 3, 4 and/or
maxillary premolar teeth 5, 6 are formed integrally as connected
teeth, the buccal groove or the lingual groove formed in the
connected teeth is positioned in parallel to the buccal grooves 17,
42 or the lingual grooves 18, 43 of the mandibular first molar
tooth 1 and/or maxillary first molar tooth 5, and the height of the
mutual cervical side end portions in the cuspal-cervical direction
is coincided in the mesiodistal direction. Thus arranged lower
molar teeth 1 to 4 and upper molar teeth 5 to 8 are mutually
occluded, and the arrangement position in the mesiodistal direction
and the buccal-lingual direction is adjusted.
[0071] In the present invention, therefore, including the case of
making the premolar teeth 3,4 and 7, 8 as the connected teeth, the
buccal grooves 17, 25, 41, 49 and lingual grooves 18, 26, 42, 50 of
the molar teeth 1, 2, 5, 6 are formed as the arrangement direction
indication parts. Accordingly, only by arranging the buccal grooves
17, 25, 41, 49 and lingual grooves 18, 26, 42, 50 so as to extend
in parallel, the molar teeth 1 to 4, 5 to 8 adjacent in the
mesiodistal direction may be arranged easily and securely in a
specified directivity. Moreover, in the embodiment, the cervical
side end portions of the buccal grooves 17, 25, 41, 49 and lingual
grooves 18, 26, 42, 50 of the molar teeth 1, 2, 5, 6 are configured
to be positioned on the maximum contour ridge line 59. Moreover,
the contact points with the adjacent teeth are formed on a plane
generally parallel to the mesiodistal direction. Accordingly, by
arranging so that the cervical side end portions of the buccal
grooves 17, 25, 41, 49 and lingual grooves 18, 26, 42, 50 and the
contact points 60 may be formed linearly in the mesiodistal
direction, the height in the cuspal-cervical direction may be
adjusted securely.
[0072] Accordingly, when arranging the lower molar teeth 1 to 4 and
upper molar teeth 5 to 8 in the mandibular plate 9 and the
maxillary plate 10, without requiring advanced skills and
experiences, the teeth can be arranged at appropriate positions
according to the oral cavity environment of each patient.
Specifically, the oral cavity of patient is very large in
individual difference, and in clinical cases of edentulous jaw, the
space, the alveolar ridge height, and angle in the oval cavity are
largely different, and in such varied clinical cases, the
artificial molar teeth can be arranged easily and in a short time,
and the situation in the oral cavity can be reproduced. Besides,
since the artificial teeth are arranged on the wax rim as temporary
plate, it has been difficult to understand the positional relation
of mutual artificial teeth, but the situation can be understood
easily. In addition, since the correct arrangement position can be
easily determined, the arrangement working efficiency is notably
enhanced. Since accurate arrangement is possible, mastication is
easily achieved after fabrication of the dentures, and in addition
to the cutting function, grinding function can be added. Moreover,
the oral cavity looks aesthetic after attachment of the
prosthesis.
[0073] FIGS. 4 and 5 show molar teeth 1 to 4, 5 to 8 in a second
embodiment. This second embodiment is different from the first
embodiment in that as the arrangement direction indication parts
there are provided arch expressing parts 68 which are positioned
near the maximum contour ridge lines 59 and consist of ridge lines
appearing as surface shapes of molar teeth 1 to 4, 5 to 8 on a
plane vertical to the maximum contour ridge lines 59, and that the
arch expressing parts 68 are arranged in parallel. The arch
expressing parts 68 are continued to the boundary lines of facets
69, 70 formed at the mesial side and the distal side at each cusp
of the molar teeth 1 to 4, 5 to 8, as shown in FIG. 5.
[0074] More specifically, in the lower molar teeth 1 to 4, anterior
occlusal facets 69 involved in the balancing function and
masticatory function in lateral motion or intermediate motion are
formed on the mesial-buccal side of the buccal cusps 11, 12, 19,
20, 27, 31, and on the mesial-buccal side of the lingual cusps 13,
14, 21, 22, 28, 32. The lower molar teeth 1 to 4 are also provided
with posterior occlusal facets 70 involved in the masticatory
function in lateral motion or posterior motion formed on the
distal-buccal side of the buccal cusps 11, 12, 19, 20, 27, 31, and
on the distal-buccal side of the lingual cusps 13, 14, 21, 22, 28,
32. Between these anterior occlusal facets 69 and posterior
occlusal facets 70, the arch expressing parts 68 which rise in the
buccal direction due to difference in the curvature and extend in
the cuspal-cervical direction are formed. Of them, the arch
expressing parts 68 formed at the buccal side of the buccal cusps
11, 12, 19, 20, 27, 31 form the arrangement direction indication
parts extending respectively in parallel.
[0075] In the upper molar teeth 5 to 8, anterior occlusal facets 69
are formed on the distal-lingual side of the buccal cusps 35, 36,
43, 44, 51, 55, and on the distal-lingual side of the lingual cusps
37, 38, 45, 46, 52, 55. Further, posterior occlusal facets 70 are
formed on the mesial-lingual side of the buccal cusps 35, 36, 43,
44, 51, 55, and on the mesial-lingual side of the lingual cusps 37,
38, 45, 46, 52, 55. Between these anterior occlusal facets 69 and
posterior occlusal facets 70, the arch expressing parts 68 are
formed as in the lower molar teeth 1 to 4. Of them, the arch
expressing parts 68 formed at the lingual side of the lingual cusps
37, 38, 45, 46, 52, 55 form the arrangement direction indication
parts extending respectively in parallel.
[0076] The arch expressing parts 68 formed in this manner are
formed in each pair at the buccal side of the mandibular molar
teeth 1, 2, and in one piece at the buccal side of the mandibular
premolar teeth 3, 4, and formed in each pair at the lingual side of
the maxillary molar teeth 5, 6, and in one piece at the lingual
side of the maxillary premolar teeth 7, 8. These arch expressing
parts 68 may be formed of corners formed by intersection of the
anterior occlusal facets 69 and the posterior occlusal facets 70,
but may be preferably formed as curved peak parts. The arch
expressing parts 68 may be also formed preferably continuously in a
band form from the cuspal peak to the cervical part, but may be
formed discontinuously in the cuspal-cervical direction. In this
case, at least in the region where the maximum contour ridge line
59 is formed, preferably, the arch expressing parts 68 may be
formed continuously in a band form so as to intersect with the
maximum contour ridge lines 59. When the arch expressing parts 68
are formed in the curved surface peaks and continuously in the
cuspal-cervical direction, the arrangement working efficiency may
be effectively enhanced.
[0077] In other words, when arranging the lower molar teeth 1 to 4
and the upper molar teeth 5 to 8 in the plates 9, 10, the teeth are
arranged as in the first embodiment. In the case that the molar
teeth 1 to 8 are arranged in a correct directivity, the arch
expressing parts 68 may be visually recognized as a continuous band
form. On the other hand, when the molar teeth 1 to 8 are arranged
in a state inclined in the mesiodistal direction, the arch
expressing parts 68 are not expressed as a continuous band form.
Hence, by checking this state, an operator can recognize a
deviation in the arrangement direction. When all of the molar teeth
1 to 4, 5 to 8 are arranged in a correct directivity, as shown in
FIG. 4, all arch expressing parts 68 are expressed in a parallel
profile. As a result, the working efficiency regarding position
adjustment of the molar teeth 1 to 8 can be enhanced.
[0078] In the embodiment, the cervical side end portions of the
lateral grooves 17, 18, 25, 26, 41, 42, 49, 50 of the molar teeth
1, 2, 5, 6 are positioned on the maximum contour ridge lines 59 as
in the first embodiment, but only the arch expressing parts 68 may
be provided as the arrangement direction indication parts.
[0079] FIGS. 6 and 7 show the artificial teeth 1 to 8, 62 to 67 in
a third embodiment. The third embodiment relates to an arrangement
of all artificial teeth including not only the molar teeth 1 to 8,
but also anterior teeth such as lower incisors 62, 63 and a lower
canine 64, and upper incisors 65, 66, and an upper canine 67, and
in particular the positional relation of the antagonist upper and
lower teeth 5 to 8, 65 to 67, and 1 to 4, 62 to 64 can be arranged
efficiently in the specified state.
[0080] More specifically, the artificial teeth 1 to 8, 62 to 67 in
the third embodiment are provided with indication lines 71 extended
in the apical-cervical direction by coloring the vestibular lateral
side as arrangement direction indication parts. As shown in FIG. 7,
when covered in a central occlusion position, a part of the
vestibular side of the mandibular teeth 1 to 4, 62 to 64 is covered
with the maxillary teeth 5 to 8, 65 to 67. After the arrangement,
moreover, the wax (the wax rim of the temporary plate) is replace
by a resin plate (a resin-made plate). Accordingly, in order that
the indication lines 71 may not be concealed in this covered state
or may not be concealed by the wax, the indication lines 71 are
extended linearly from the apical side edge to the cervical side
edge as seen from the vestibular side. Being extended linearly
means, herein, either one straight line, or a line containing
plural points extended intermittently (e.g., broken line). In the
embodiment, the indication lines 71 of the upper and lower
antagonist teeth, that is, the maxillary teeth 5 to 8, 65 to 67,
and the mandibular teeth 1 to 4, 62 to 64 are provided linearly to
be positioned at the central occlusion position.
[0081] At the central occlusion position, the lower central incisor
62 is covered with the upper central incisor 65, the upper central
incisor 65 further covers the lower lateral incisor 63, the lower
lateral incisor 63 is further covered with the upper lateral
incisor 66, the upper lateral incisor 66 further covers the lower
canine 64, the lower canine 64 is further covered with the upper
canine 67, the upper canine 67 further covers the mandibular first
premolar tooth 3, the mandibular first premolar tooth 3 is further
covered with the maxillary first premolar tooth 7, the maxillary
first premolar tooth 7 further covers the mandibular second
premolar tooth 4, the mandibular second premolar tooth 4 is further
covered with the maxillary second premolar tooth 8, the maxillary
second premolar tooth 8 further covers the mandibular first molar
tooth 1, the mandibular first molar tooth 1 is further covered with
the maxillary first molar tooth 5, the maxillary first molar tooth
5 further covers the mandibular second molar tooth 2, and the
mandibular second molar tooth 2 is further covered with the
maxillary second molar tooth 6. Accordingly, the lower central
incisor 62 and the maxillary second molar tooth 6, covered by or
covering only one tooth each, is provided with one indication line
71 each, so as to be positioned linearly to the indication line 71
of the antagonist teeth 65, 2 covering or to be covered. The other
teeth 1 to 7, 63 to 67 to be covered with or covering these two
teeth are provided with two indication lines 71 in parallel, so as
to be positioned linearly to the indication lines 71 of the two
teeth 1 to 8, 62 to 67 covering or to be covered.
[0082] The forming method of these indication lines 71 includes a
method of coloring the forming position of the vestibular side, and
a method of coloring the region excluding the forming position so
as to be expressed by the non-colored region. The colored region
and the non-colored region are preferred to be different in color,
but a same or similar color may be possible. However, in the case
of same color or transparent color, it is preferred to use a color
emitting light at a specified frequency, or developing color or
emitting light in darkness. When using different colors, different
colors such as black, red or blue may be used in each one of the
artificial teeth 1 to 8, 62 to 67, or in each one of indication
lines 71.
[0083] The coloring material for forming indication lines 71 may be
an oil-based ink and other material not deleted (peeled) in
arrangement or transportation process. This coloring material may
be naturally erased when worn in the oral cavity, or may be removed
by using a chemical after the arrangement. The pigment of the
coloring material may contain an organic material and a coloring
material, and may preferably a material for oral use as designated
as a food additive.
[0084] The artificial teeth 1 to 8, 62 to 67 of the third
embodiment having the above configuration are arranged, for
example, as in the first embodiment, sequentially from the lower
central incisor 62 to the mandibular second molar tooth 2 in the
distal direction, and arranged sequentially from the upper central
incisor 65 to the maxillary second molar tooth 6. Then, after
occlusion between the mandibular teeth 1 to 4, 62 to 64, and the
maxillary teeth 5 to 8, 65 to 67, the indication lines 71
corresponding to each other are positioned and adjusted
linearly.
[0085] Alternatively, after arranging the lower central incisor 62
in the mandibular plate 9, the upper central incisor 65 is arranged
in the maxillary plate 10. After occlusion of these central
incisors 62, 65, the indication line 71 positioned at the mesial
side of the upper central incisor 65 and the indication line 71 of
the lower central incisor 62 are adjusted to be positioned
linearly. In succession, after arranging the lower lateral incisor
63 in the mandibular plate 9, the lower lateral incisor 63 and the
upper central incisor are occluded, and the indication line 71 at
the mesial side of the lower lateral incisor 63 and the indication
line 71 at the distal side of the upper central incisor 65 are
adjusted to be positioned linearly. Then, after arranging the upper
lateral incisor 66 in the maxillary plate 10, the upper lateral
incisor and the lower lateral incisor are occluded, and the
indication line 71 at the mesial side of the upper lateral incisor
66 and the indication line 71 at the distal side of the lower
lateral incisor 63 are adjusted to be positioned linearly.
[0086] In this manner, the mandibular teeth 1 to 4, 62 to 64 and
the maxillary teeth 5 to 8, 65 to 67 are sequentially arranged in
the plates 9, 10, and are occluded on every occasion of
arrangement, and the mesial side indication lines of the later
arranged teeth may be linearly positioned and adjusted to the
distal side indication lines 71 of the previously arranged teeth.
By repeating this operation, the teeth are arranged up to the final
maxillary second molar tooth 6. When arrangement and adjustment of
all teeth are completed, the indication lines 71 are removed.
[0087] As described above, since the artificial teeth 1 to 8, 62 to
67 of the third embodiment are provided with the colored indication
lines 71 extended in the apical-cervical direction as the
arrangement direction indication parts, only by adjusting the
indication lines 71 to be positioned linearly to the mandibular
teeth 1 to 4, 62 to 64 and the maxillary teeth 5 to 8, 65 to 67,
the position in the mesiodistal direction can be adjusted easily
without requiring advanced skills and experiences. Moreover, not
limited to the molar teeth 1, 2, 5, 6 as in the first embodiment,
the premolar teeth 3, 4, 7, 8 and the anterior teeth 62 to 67 can
be adjusted easily. Recently, it is required to keep the record of
the process of treatment, and it is easy to keep the record of the
arrangement process by photographs or the like according to the
third embodiment.
[0088] FIGS. 8 to 10 show the artificial teeth 1 to 8, 62 to 67 in
a fourth embodiment. This fourth embodiment is significantly
different from the third embodiment in that as the arrangement
indication parts, there are provided the indication lines 71 which
are formed by coloring the buccal side and are extended in the
mesiodistal direction.
[0089] Moreover, this embodiment differs from the foregoing
embodiments in that arrangement confirmation sheets 72A, 72B are
additionally provided for checking the arrangement state in the
arranged state of the artificial teeth 1 to 8, 62 to 67.
[0090] More specifically, as shown in FIG. 8, the artificial teeth
1 to 8, 62 to 67 of the embodiment are provided with a pair of
indication lines 71, 71, individually extended in the mesiodistal
direction. One of these indication lines 71, 71 is deviated to the
cervical side at one crown, and the other is deviated to the apical
side. The cervical side indication line 71 in the mandibular teeth
1 to 4, 62 to 64 and in the maxillary teeth 5 to 8, 65 to 67 is
provided so as to be positioned linearly all in the mesiodistal
direction. The apical side indication line 71 in the mandibular
teeth 1 to 4, 62 to 64 and in the maxillary teeth 5 to 8, 65 to 67
is provided so as to be positioned on the maximum contour ridge
line 59.
[0091] In the embodiment, the lower molar teeth 1 to 4 and the
upper molar teeth 5 to 8 are formed, as in the first embodiment, so
that the maximum contour ridge lines 59 may be positioned linearly.
Accordingly, the apical side indication lines 71 formed on them are
positioned linearly in the mesiodistal direction. Of the other
artificial teeth 62 to 67, the lower anterior teeth 62 to 64 are
formed so that the maximum contour ridge line 59 may be positioned
linearly in the mesiodistal direction. Hence, the apical side
indication line 71 formed on them is positioned linearly in the
mesiodistal direction. In the upper anterior teeth 65 to 67, except
for the upper canine 67 at the distal side, the maximum contour
ridge line 59 of the upper central incisor 65, 66 is formed to be
positioned linearly in the mesiodistal direction. Hence, the apical
side indication line 71 formed on them is positioned linearly in
the mesiodistal direction. The upper canine 67 is configured so
that the maximum contour ridge line 59 may be positioned linearly
in the mesiodistal direction to the upper molar teeth 5 to 8.
Hence, the indication line 71 of the upper canine 67 is positioned
linearly to the mesiodistal direction to the apical side indication
line 71 of the upper molar teeth 5 to 8.
[0092] When the mandibular teeth 1 to 4, 62 to 64 having the above
configuration are arranged in normal arrangement state, a group of
one indication line 71 extending intermittently at the cervical
side is formed. At the apical side, a group of two indication lines
71 extending generally continuously is formed. The group of these
indication lines 71 is positioned parallel to the apical-cervical
direction and is extended in parallel. Similarly, when the
maxillary teeth 5 to 8, 65 to 67 are arranged in normal arrangement
state, a group of one indication line 71 extending intermittently
at the cervical side is formed. At the apical side, a group of two
indication lines 71 extending generally continuously is formed. The
group of these indication lines 71 is positioned parallel to the
apical-cervical direction and is extended in parallel. When the
mandibular teeth 1 to 4, 62 to 64, and the maxillary teeth 5 to 8,
65 to 67 are occluded at the central occlusion position, the group
of these indication lines 71 is positioned in parallel to the
apical-cervical direction, and is extended in parallel.
[0093] When the artificial teeth 1 to 8, 62 to 67 of the fourth
embodiment are arranged, as in the first embodiment, the mandibular
teeth 1 to 4, 62 to 64 and the maxillary teeth 5 to 8, 65 to 67 are
arranged sequentially in the plates 9, 10 from the central incisors
62, 65 to the distal side up to the second molar teeth 2, 6. At
this time, in each upper and lower pair of central incisors 62, 62
and 65, 65, except for the previously arranged central incisors
62,65, the later arranged mandibular teeth 1 to 4, 62 to 64 and
maxillary teeth 5 to 8, 65 to 67 are arranged by adjusting so that
the indication lines 71, 71 positioned at the apical side and the
cervical side may be positioned linearly in the mesiodistal
direction with respect to the indication lines 71, 71 of the
previously arranged teeth. The mandibular teeth 1 to 4, 62 to 64
and the maxillary teeth 5 to 8, 65 to 67 are adjusted and arranged
so that the indication lines 71, 71 may be extended in parallel. As
a result, as in the foregoing embodiments, without requiring
advanced skills and experiences, the teeth may be arranged in
specified positions by adjusting the position in the mesiodistal
direction and the apical-cervical direction.
[0094] In the embodiment, when arrangement of the artificial teeth
1 to 8, 62 to 67 in the plates 9, 10 is completed, as shown in
FIGS. 9A, 9B and FIGS. 10A, 10B, the arrangement state is confirmed
by the arrangement confirmation sheets 72A, 72B. The arrangement
confirmation sheets 72A, 72B are formed of a base sheet 73, and
confirm lines 74 to be overlapped with indication lines 71 in the
normally arranged state. In this embodiment, two types are
provided, for the mandibular teeth 1 to 4, 62 to 64, and the
maxillary teeth 5 to 8, 65 to 67. The base sheet 73 is transparent
or translucent so that the back side may be visible. The base sheet
73 is rectangular in shape formed of an elastically deformable
resin. The confirm line 74 is formed in a line width similar to the
indication line 71, and is opaque so that the back side may not be
visible. The confirm line 74 is formed of an oil-based ink similar
to the indication line 71, or formed of an opaque resin by double
mold.
[0095] The arrangement confirmation sheet 72A is disposed at the
vestibular side of the arranged mandibular teeth 1 to 4, 62 to 64,
and the arrangement confirmation sheet 72B is disposed at the
vestibular side of the maxillary teeth 5 to 8, 65 to 67, and
depending on whether the all indication lines 71 are overlapped
with the confirm lines 74 or not, it can be determined whether the
artificial teeth 1 to 8, 62 to 67 are arranged in normal state or
not. If any deviation is found in the artificial teeth 1 to 8, 62
to 67, they can be adjusted to the specified position. Accordingly,
advanced skills and experiences is not required for the operator
for arranging teeth. Of course, these arrangement confirmation
sheets 72A, 72B can be used not only after arrangement of all
mandibular teeth 1 to 4, 62 to 64 and maxillary teeth 5 to 8, 65 to
67, but also during arrangement thereof.
[0096] The artificial teeth of the present invention are not
limited to the configuration described in the embodiments, but may
be changed in various forms.
[0097] For example, the configuration of the first embodiment of
the arrangement direction indication parts including lateral
grooves 17, 18, 25, 26, 41, 42, 49, 50, and the configuration of
the second embodiment of the arrangement direction indication parts
including arch expression part 68 may be combined with the
configurations of third and fourth embodiments of arrangement
direction indication parts of indication lines 71. In particular,
as shown in the first to third embodiments, the configuration of
arrangement direction indication parts extended in the
apical-cervical direction may be combined with the configuration of
the fourth embodiment of arrangement direction indication parts
extended in the mesiodistal direction, and the arrangement
precision and the working efficiency may be substantially
enhanced.
[0098] In the foregoing embodiments, the arrangement direction
indication parts are provided on the vestibular side and/or oral
side of the artificial teeth 1 to 8, 62 to 67, but in the case of
molar teeth 1 to 8, in particular, the arrangement direction
indication parts may be provided on the occlusal plane so as to be
linear as seen from the occlusal plane. As a result, without
requiring advanced skills and experiences, the arrangement position
may be adjusted at high precision.
[0099] Further, as in the fourth embodiment, the configuration of
forming the arrangement confirmation sheets 72A, 72B may be also
combined with the configuration of the first to third embodiments,
or with all embodiments, and may be similarly applicable. The
arrangement confirmation sheets may not be divided for the
mandibular teeth 1 to 4, 62 to 64 and the maxillary teeth 5 to 8,
65 to 67, but may be formed as one piece. In the foregoing
embodiments, to cover all of each pair of mandibular teeth 1 to 4,
62 to 64 and maxillary teeth 5 to 8, 65 to 67, confirm lines 74
corresponding to all indication lines 71 are provided, but since
they are symmetrical, and they may be formed only in half of
them.
[0100] In the third and fourth embodiments, the indication lines 71
of the majority of the adjacent teeth are positioned nearly, but
when arrangement confirmation sheets are used, in particular, only
by disposing in parallel or in line, it is not required to form to
be positioned linearly. What is more, the artificial teeth 1 to 8,
62 to 67 are provided in plural types slightly different in
appearance depending on the shape of the remaining teeth of patient
and the jaw shape, but when the arrangement confirmation sheets are
used, all plural types may be formed to be identical in the
position of the indication lines 71, and the arrangement
confirmation sheets may be formed in one type only.
[0101] Although the present invention has been fully described by
way of the examples with reference to the accompanying drawings, it
is to be noted here that various changes and modifications will be
apparent to those skilled in the art. Therefore, unless such
changes and modifications otherwise depart from the spirit and
scope of the present invention, they should be construed as being
included therein.
* * * * *