U.S. patent number 3,745,655 [Application Number 05/147,769] was granted by the patent office on 1973-07-17 for endodontic irrigating instrument.
Invention is credited to Oscar Malmin.
United States Patent |
3,745,655 |
Malmin |
July 17, 1973 |
ENDODONTIC IRRIGATING INSTRUMENT
Abstract
An endodontic irrigating instrument including a body portion
which has at least one chamber capable of receiving a disposable
syringe, with said chamber being in communication with a through
bore in the body. The instrument also has a second through bore in
its handle which can be connected to a vacuum source and has a
valve which is movable between a position in which the bore leading
from the syringe chamber is connected to the through bore of the
body to a position in which the bore in the handle is in
communication with the through bore of the body. The operative end
of the instrument is adapted to receive a disposable needle which
communicates with the through bore of the body. The instrument is
then capable of selectively performing variable and different
functions through a common orifice. The instrument also can include
a heating element in association with the syringe chamber to
preheat the solution contained in the syringe.
Inventors: |
Malmin; Oscar (Akron, OH) |
Family
ID: |
22522829 |
Appl.
No.: |
05/147,769 |
Filed: |
May 28, 1971 |
Current U.S.
Class: |
433/81;
433/91 |
Current CPC
Class: |
A61C
17/0208 (20130101) |
Current International
Class: |
A61C
17/00 (20060101); A61C 17/02 (20060101); A61c
003/00 () |
Field of
Search: |
;32/22,53,40
;128/178.1 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Peshock; Robert
Claims
What is claimed is:
1. An endodontic irrigating instrument for use with a vacuum source
and a prepackaged, disposable, hand-operated fluid source and being
capable of selectively performing the functions of introducing
irrigating fluid into a root canal and evacuating said canal
through a common orifice, comprising;
A. a body portion having
1. at least one elongate chamber in one end thereof adapted to
telescopically receive said prepackaged disposable fluid source
2. and a through passageway in the opposed end of the body
interconnecting the said chamber
3. a second passageway leading from said chamber to said through
passageway
B. a handle portion having a through passageway therein adapted to
be connected to said vacuum source;
C. a valve
1. carried by said body and having a through bore therein
2. said valve being movable from a position in which its bore
interconnects said second passageway and said through passageway in
said body to a position in which its bore interconnects said
passageway in said handle and said passageway in said body; and
D. needle-receiving means disposed on said opposed end of said
body
1. whereby a hollow needle received thereon will have its central
passageway in communication with said passageway in said body.
2. The instrument of claim 1 further characterized by the presence
of heating means carried by said body portion adjacent said
chamber.
3. The instrument of claim 1 further characterized by the presence
of a switch carried by said body portion and being electrically
connected to said vacuum source; said switch being activated by
said valve means.
4. The instrument of claim 3 further characterized by the fact that
said valve means are releasably carried by said body.
5. The instrument of claim 1 further characterized by the presence
of stop means carried by said body portion for controlling the
movement of said valve between said positions.
6. An endodontic irrigating instrument for use with a vacuum source
and a prepackaged, disposable fluid source and being capable of
selectively performing the functions of introducing irrigating
fluid into a root canal and evacuating said canal through a common
orifice, comprising;
A. a body portion having
1. at least one elongate chamber in one end thereof adapted to
telescopically receive said prepackaged, disposable fluid
source
2. and a through passageway in the opposed end thereof
interconnecting with said chamber;
B. a handle portion having a through passageway therein adapted to
be connected to said vacuum source;
C. a spring-loaded valve
1. carried by said body
2. having a through bore therein
3. and a through slot in one end thereof;
D. said valve being normally urged to a position in which said slot
is in registry with said through passageway in said body whereby
said passageway remains open to said chamber while said passageway
in said handle is closed;
E. said valve being movable to a position in which said through
bore thereof interconnects said passageway in said handle and said
passageway in said body;
F. needle-receiving means disposed on said opposed end of said
body
1. whereby a hollow needle received thereon will have its central
passageway in communication with said passageway in said body.
7. The instrument of claim 6 further characterized by the presence
of means carried by said handle portion for connection with said
vacuum source.
8. The instrument of claim 6 further characterized by the presence
of heating means carried by said body portion adjacent said
chamber.
9. The instrument of claim 6 further characterized by the presence
of a needle received on said needle-receiving means and having a
through aperture which communicates with said through passageway of
said body.
10. An endodontic irrigating instrument for use with a vacuum
source and a prepackaged, disposable, hand-operated fluid source
and being capable of selectively performing the functions of
introducing irrigating fluid into a root canal and evacuating said
canal, comprising;
A. a body portion having
1. at least one elongate chamber in one end thereof adapted to
telescopically receive said prepackaged, disposable fluid source
and
2. a first through passageway from said chamber to the opposed end
of said body;
B. a handle portion having a through passageway therein adapted to
be connected to said vacuum source;
C. said body portion having a second through passageway therein
interconnecting said opposed end of said body with said passageway
in said handle;
D. a valve
1. carried by said handle portion and having a through bore
therein
2. said valve being movable from a position in which its bore
interconnects said second passageway in said body and said
passageway in said handle to a position in which said valve closes
off said passageway in said handle;
E. needle-receiving means disposed on said opposed end of said
body
1. whereby a hollow needle received thereon will have its central
passageway in communication with said passageways in said body.
11. The instrument of claim 10 further characterized by the
presence of means carried by said handle portion for connection
with said vacuum source.
12. The instrument of claim 10 further characterized by the
presence of heating means carried by said body portion adjacent
said chamber.
13. The instrument of claim 10 further characterized by the
presence of a needle received on said needle-receiving means and
having a through central aperture therein which communicates with
said passageways in said body.
Description
FIELD OF THE INVENTION
This invention, in general, relates to endodontics which is the
branch of dentistry dealing with the cause, diagnosis, prevention
and treatment of diseases of the dental pulp and includes pulp
canal therapy and root canal therapy. In particular, the invention
relates to an irrigating device which is capable of dispensing a
liquid under variable pressure into the canal to loosen up dentin
chip and then providing a variable suction to remove these chips
from the canal.
DESCRIPTION OF THE PRIOR ART
In root canal preparation, the reaming and filing operation in
effect removes dentin chips from the tooth, and these chips are
susceptible of becoming trapped within the canal. Since the
purpose, of course, is to keep open the canal while enlarging it,
this is self-defeating.
At the present time there is no really satisfactory way of
loosening and removing the chips which can become compacted and
prevent the proper filling or sealing of the root canal. This
operation is presently accomplished by using instruments, one of
which injects liquid under pressure to loosen the chips, and paper
points are then used to dry the root canal. The process is tedious
and inefficient. Applicant is not aware of any prior patent art in
this regard other than a device that provides pressure and exhaust
simultaneously, which has been found unsatisfactory by the Council
on Dental Materials and Devices of the American Dental
Association.
SUMMARY OF THE INVENTION
It has been discovered that the difficulties encountered in
endodontic surgery can be greatly lessened by the utilization of an
irrigating device having a chamber (with the preferred form capable
of receiving a disposable syringe) containing irrigating flud, with
the device also being connected to a vacuum source and with both
functions being performed through a common orifice or channel.
It has also been found that by providing the device with a gripping
handle and a valve which can alternately be moved into
communication with either the bore or passage leading from the
chamber with the irrigating fluid or with the bore or passage
leading to the exhaust or vacuum, that two operations can be
performed alternately with the same device without removing the
device or changing hands. This device permits the operation to be
performed with a single hand quickly and easily and with
selectivity in the force of injection or suction.
Furthermore, it has been found that two channels, one channel for
each function, can be designed with the collar of the disposable
needle serving to form a common channel and orifice.
Furthermore, it has been found that a disposable needle and tubing
can be used so that the entire device has improved sanitary
properties as well.
Furthermore, it has been found that a switch used with the valve
handle can serve to activate or inactivate the evacuation
source.
Finally, it has been found that means can be provided for heating
the fluid in the syringe prior to the time it is forced into the
tooth.
Accordingly, production of an improved endodontic irrigating
instrument having the above-noted characteristics becomes the
principal object of this invention, with other objects thereof
becoming more apparent upon a reading of the following brief
specification, considered and interpreted in the light of the
accompanying drawings.
OF THE DRAWINGS
FIG. 1 is an end elevation of one form of the improved irrigating
instrument.
FIG. 2 is a side elevation in section taken along the line 2--2 of
FIG. 1.
FIG. 3 is a sectional view taken on the line 3--3 of FIG. 2 showing
the interconnection of the various bores or passages.
FIG. 4 is a side elevation of a modified form of the invention in
section similar to FIG. 2.
FIG. 5 is an end elevation of another modified form of the
invention.
FIG. 6 is a side elevation in section taken along the line 6--6 of
FIG. 5.
FIG. 7 is an end elevation of a still further modified form of the
invention.
FIG. 8 is a sectional view taken along the line 8--8 of FIG. 7
showing the modified form of the invention.
FIG. 9 is a partial sectional view taken along the line 9--9 of
FIG. 8.
FIG. 10 is a sectional view similar to FIGS. 2, 4, 6 and 8 showing
a further modification.
FIG. 11 is a partial end elevation of the modification of FIG.
10.
FIG. 12 is a sectional view showing a modified valving arrangement
as well as a single orifice form of the invention.
FIG. 13 is a partial sectional view similar to FIG. 12 and showing
the valving means in a different position.
FIG. 14 is an end elevation of a still further modified form of the
invention.
FIG. 15 is a sectional view taken on the line 15--15 of FIG.
14.
FIG. 16 is a side elevation of the valving means employed in the
form of the invention shown in FIGS. 14 and 15.
FIG. 17 is a sectional view taken along the line 17--17 of FIG.
16.
FIG. 18 is an end elevation of a still further modified form of the
invention.
FIG. 19 is a sectional view taken along the line 19--19 of FIG.
18.
FIG. 20 is a partial sectional view showing the valving means of
the form of the invention shown in FIGS. 18 and 19 in a different
position.
FIG. 21 is a sectional view of a still further modified form of the
invention.
FIG. 22 is a partial sectional view showing the valving means in a
different position.
FIG. 22a is an elevational view of the valving means of FIGS. 21
and 22.
FIG. 22b is a side elevation of the valving means shown in FIG.
22a.
FIG. 23 is a partial sectional view showing still another form of
valving means.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Turning first then to FIG. 1, it will be seen that the improved
irrigating device generally indicated by the numeral 10 includes a
handle 11 and a body 12. In the preferred embodiment of the
invention, this would be a molded handle of plastic or some
suitable material which is light-weight yet durable.
Considering FIGS. 1 and 2 for a detailed description of the device,
it will be seen that handle 11 has a through bore or passage 11a
therein, with this passage continuing from the handle portion 11 up
into the body portion 12.
At the bottom end of the handle 11, there is a molded contoured
fitting 11b intended to permit a hose 40 to be snapped over it with
the hose 40 leading to another snap-type fitting 41 which in turn
is connected to a vacuum source (not shown).
The body 12 has a first chamber 13 therein for reception of a
disposable syringe. One end of the chamber 13 opens into a bore or
passage 15 in the body as clearly shown in FIG. 2.
The body 12 also includes a second chamber 14 within which the
valving means 20 are received. These valving means consist of an
elongate cylindrical unit 21 having a head 22 which is capable of
being snapped into the chamber 14 and held in place against axial
movement relatively of body 12 by the annular rib 24 and a
corresponding groove in the wall of the chamber 14.
The valving means 20 also includes a handle 23 movable between the
full and chain-dotted line positions of FIGS. 1 and 2 for purposes
which will be described.
Valving means 20 also includes an L-shaped passage 25 in the end
thereof and in FIG. 2 of the drawings, this passage is in
communication with bore or passage 15 leading from the syringe
chamber 13.
The body 12 also has a through passage 17 in its end 16. This end
is dimensioned and shaped so as to receive a snap-on needle 30
which can be a disposable needle, if desired, the passage 17, of
course, communicating with the central bore 31 in the needle.
In operation of the form of the invention shown in FIGS. 1 and 2,
and assuming that the device is in the condition shown in FIG. 2,
the disposable syringe (not shown) is inserted in chamber 13 and
actuation of the syringe will cause the irrigating fluid therein to
pass through passage 15 in the head 12 and thus through the bore or
passage 25 in valve 20 and bore or passage 17 in the head. This
enables the irrigating solution, which may be hydrogen peroxide,
hypochlorite or any suitable solution, to then be forced through
needle 30 into the canal at the option of the user.
When it is desired to evacuate the loose chips contained in the
canal, it is simply necessary to move the handle 23 on the valving
means 20 to the chain-dotted line position of FIG. 2, at which time
the passage 25 of valving means 20 will come into communication
with passage 11a leading to the vacuum source. Since passage 25 is
at all times in communication with passage 17 and thus with needle
30 and assuming that the vacuum source has been actuated at this
time, the chips will be removed from the canal through the various
passages.
In this connection, it is also possible to provide for automatic
actuation of the vacuum source. This can be accomplished by
providing an electrical cord 80 in the handle 11 with the cord
having a plug 81 on its outboard end and a contact switch 82 on its
inboard end. In this fashion, the handle 23 can be brought into
contact with switch 82 thereby automatically energizing the vacuum
source and eliminating the need to do it manually.
Considering next FIG. 4, which is a modified form of the invention,
it will be noted that this form is very similar to the form shown
and described above, with the exception of the provision of a
heating element or coil 50 which surrounds the syringe chamber 13.
This element is connected to an electrical cord 51 and has a plug
52 which can be secured to any suitable electric source. In this
fashion, the device is capable of preheating the solution contained
in the syringe before it is forced into the canal as described
above. The suction or vacuum portion of the device operates
similarly to that described above.
This form of the invention also discloses an alternative valving
means in which the handle 22 is eliminated and the knurled head 21
is simply rotated manually. A stop 80 is provided on the head 12 so
that the operator will know when he has rotated the valving means
20 sufficiently to bring the appropriate passages into
communication with each other. This valving system could also be
utilized with the form of the invention shown in FIGS. 1 and 2.
Considering next then FIG. 6, a still further modified form of the
invention is shown. In this form, a projection 60 is provided
within chamber 13 to puncture the end of the syringe 70. The body
12 also has a projecting end portion 12a which is appropriately
threaded as at 18. A cap 19 screws onto this and a plunger 71 is
utilized to force the end of the syringe 70 against the projection
16, thereby puncturing it and enabling the liquid to be forced
through the appropriate passages.
Operation of the vacuum or exhaust portion of the device is the
same as described above and again either the valving means of FIGS
1 and 2 or that of FIG. 4 can be used.
FIGS. 7 and 8 show a still further modification in which a pair of
parallel syringe chambers 113 and 114 are provided so that more
than one type of irrigating solution can be utilized.
In this fashion, alternative chemical solutions can be used for
irrigating purposes. The operation of the valving means 120 in this
form of the invention is similar to that shown and described in
conjunction with FIG. 4, except that three stops 180, 180, 180 are
utilized since the valve must be capable of being moved into three
separate positions. Otherwise, the operation is similar to that
described above.
Turning next to FIGS. 10 and 11, a still further modified form of
the invention is disclosed. In this form of the invention, a still
different type valving means is utilized. Thus, the valving means
220 are mounted on the body 212 and are capable of moving between
the full and chain-dotted line positions. The syringe 270 fits in
the head 212 as described above. When the handle 222 is in the
position shown in FIG. 11, the passage leading from the syringe to
the needle is open and the irrigating fluid can be introduced into
the canal. When the handle 222 is moved to a position abutting the
control stop 223, the passage leading to the vacuum is opened, and
in this way the normal vacuum procedure as called for above can be
employed.
It is also possible in the form of the invention, for example, in
FIGS. 2 and 11, to provide a switch on the outside of the head 12
so that when the handle 222 is moved to open up the vacuum or
exhaust passage, the switch will be activated to energize or
actuate the vacuum source. This obviates the necessity of having
this continually running.
In this form of the invention a hose connector plug 230 would be
used to connect the instrument with the vacuum source. This
connector is contoured to be snapped into a complementally shaped
opening 231 in handle 211.
It should be noted that while plastic has been mentioned as
possible material for the device, any suitable material could be
employed, and the invention is not intended to be so limited.
Furthermore, it will be noted that while in the modification of
FIG. 7 more than one chamber for receiving the syringe is employed,
it is apparent that even more could be provided although Applicant
has only illustrated two in the drawing.
It should also be noted that the vacuum source and heat source
referred to in the specification are conventional in nature and
have not been shown in detail since they would be well within the
skill of anyone skilled in this art and, as a matter of fact, are
commercially available.
Turning next then to FIGS. 12 and 13 for a still further modified
form of the invention and the preferred form, it will be seen that
the irrigating device includes a handle portion 311 and a body
portion 312. The usual passageway 311a is provided in the handle
for access to the vacuum source, and the usual passageway 312a is
provided in the head so that it can communicate with the chamber
313 which receives syringe 370. A common passageway 312b is also
provided in the outboard end of the head 312.
The valving means of this form of the invention are somewhat
different. The head 312 has a bore 314 and a counterbore 314a
therein. The valving means 320 comprise a head 321 and an enlarged
body member 322 which has secured to one end thereof a projection
316, and this projection has at its outboard end a through passage
316a.
Seated in the bottom of the counterbore portion of the head 314a is
a spring 315 which bears against the bottom of the body portion 322
of the valving means 320. This body portion 322 also has an
elongate slot 322a therein which receives a pin 317 which is
mounted to the body and which serves to locate the overall valving
means.
In the condition shown in FIG. 12, the spring is at its extended
position which would be its normal position, and thus the overall
valving means 320 are retracted to the right. Due to the fact that
a through bore 316b is provided in the end of the projecting
portion 316 of the valving means, a through passage is formed
between passageways 312a, bore 316b, and passageway 312b. This
permits the irrigating solution to be passed into the canal.
An examination of FIG. 13 shows the valving means depressed and
moved to the left of the device. In this condition the bore 316a of
the valving means 320 is in communication with passageway 312b of
the head and 311a of the handle, thereby permitting the exhaust or
vacuum system to operate.
This form of the invention also may utilize a base connector 330
which snaps into contoured opening 331.
Turning next then to FIGS. 14, 15, 16, and 17, a still further
modified valving operation and means is disclosed.
Thus, the handle 411 has a passageway 411a for vacuum and exhaust
purposes.
The head or body portion of the irrigating device has a chamber 413
for reception of the syringe and a passageway 412a communicating
therewith. The head or body portion 412 also has a through passage
412b leading to its outboard end.
The valving means 420 consist of a head 422 and a body portion 423
projecting therefrom. A through slot 424 is cut in the outboard end
of the body portion 423.
The valving means 420 also have a half-ring 422a which snaps over
the projection 412c on the body. A half-ring 412d is provided, and
in this fashion turning of the head 422 will move the slotted
portion 424 from the position shown in FIG. 15 in which it is in
communication with the passageways 412 and 412b to a position in
which the passageway 412a is cut off and 411a is opened. In this
way the irrigation and exhaust functions can be readily performed
as described before.
Again a snap-in connector 430 is used.
The form of the invention shown in FIGS. 21 and 22 envisions the
utilization of separate channels in the head or body portion 512,
with these channels being identified by the numerals 512a and 511a.
The needle 530 snaps over the end of the body portion 512 and, of
course, depending upon which passageway is being utilized, will
either receive the irrigating fluid or will permit operation of the
vacuum or exhaust.
The valving means 520 is a snap-in type valve which has a through
opening 521. In the position shown in FIG. 21, the suction or
vacuum system is opened, with the passageway 521 in the valve
permitting a completely open system.
In FIG. 22, it will be noted that the valve has been rotated so as
to close off the exhaust system, and at this time actuation of the
syringe 570 permits the lubricating fluid to be passed into the
root canal.
FIG. 23 shows a modified valve means 520a suitable for use with the
instrument shown in FIG. 21. This is a flexible snap-in type valve
and is movable between a position in which the suction or vacuum
system is open to a position in which it is closed. The position
shown in FIG. 23 is closed, and when the top of the flexible dome
520a is depressed, the channel 511a in the body and 511a in the
handle have direct communication with the suction source.
FIGS. 18, 19, and 20 show a still further modified form of the
invention employing a transverse valve which is adaptable to being
mounted on either the right or left hand side of the instrument
depending upon the desires of the user.
This form of the invention discloses a handle 611 which has a
through opening 611a therein through which the hose leading to the
suction source can be passed. It is understood that this hose can
be snapped over the end 614 of the body 612 so that the exhaust
system is in communication with passageway 611b.
The head or body portion 612 has the normal chamber 613 for
reception of the syringe 670 and also has a short passageway 612a
to communicate with the chamber 613. Finally, the body has a common
passageway 612b leading to the needle.
The valving means themselves consist of a handle 620 and a body
621, with the body having parallel through bores 621a and 621b
therein. This handle is press-fit into a transverse bore in the
body 12, and as noted above can be employed on either the right or
left hand side of the instrument with the same being on the right
hand side in the form shown in FIG. 19.
It is believed apparent that in the position of FIG. 19, the
irrigating passageways are open and the handle 620 is resting
against the stop member 631. The reference to FIG. 22 will show
that the valving means has been rotated about its axis so that the
handle 620 contacts the stop member 630. In this position the
vacuum or suction system is opened since passageway 621b is now in
position to interconnect 611b and 612b and also to close off 612
a.
Reference to FIG. 18 will show that stops 632 and 633 are provided
on the opposed side of the body so that the valve can be taken out
and snapped in from the other side for left-hand operation if
desired.
It has been shown, therefore, how a dual purpose syringe can be
utilized to provide in one instrument the capability of performing
two separate operations, which heretofore have been slowly and
awkwardly handled by separate instruments. Thus, both the
irrigating and the cleaning operation can be performed with the
same instrument simply by turning the valves. The instrument is
compact, light-weight and easy to handle and greatly simplifies
this facet of the endodontic treatment.
While a full and complete description of the invention has been set
forth in accordance with the dictates of the Patent Statutes, it is
understood that modifications can be resorted to without departing
from the spirit hereof or the scope of the appended claims.
* * * * *