U.S. patent application number 16/371850 was filed with the patent office on 2019-07-25 for patient-specific femoral guide.
The applicant listed for this patent is Biomet Manufacturing, LLC. Invention is credited to Jason D. Meridew, Robert Metzger, Tony Siebeneck.
Application Number | 20190223885 16/371850 |
Document ID | / |
Family ID | 45814679 |
Filed Date | 2019-07-25 |
United States Patent
Application |
20190223885 |
Kind Code |
A1 |
Meridew; Jason D. ; et
al. |
July 25, 2019 |
PATIENT-SPECIFIC FEMORAL GUIDE
Abstract
A medical device for preparing an elongated bone, such as a
proximal femoral bone, for receiving an implant includes a
patient-specific femoral guide and an elongated alignment element.
The femoral guide has a patient-specific three-dimensional
bone-engaging surface configured according to a preoperative plan
based on a three-dimensional image model of the femoral bone to
mate complementarily with the surface of the proximal femoral bone
extending between the greater trochanter, the femoral neck and the
femoral shaft of the proximal femur. The femoral guide includes a
first guide end forming a planar guide configured for guiding a
neck resection. The alignment member can be removably attached to
the femoral guide and defines a reference axis for guiding a
cutting tool into the femoral bone through a resected surface of
the femoral neck.
Inventors: |
Meridew; Jason D.; (Warsaw,
IN) ; Siebeneck; Tony; (Mentone, IN) ;
Metzger; Robert; (Wakarusa, IN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Biomet Manufacturing, LLC |
Warsaw |
IN |
US |
|
|
Family ID: |
45814679 |
Appl. No.: |
16/371850 |
Filed: |
April 1, 2019 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
13041883 |
Mar 7, 2011 |
10278711 |
|
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16371850 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A61F 2002/4687 20130101;
A61B 2034/105 20160201; A61B 17/1659 20130101; A61B 17/152
20130101; A61B 17/1735 20130101; A61B 2034/108 20160201; A61B
2034/252 20160201; A61B 2090/034 20160201; A61B 17/15 20130101;
A61B 17/175 20130101; A61B 34/10 20160201; A61B 2017/568 20130101;
A61B 17/151 20130101; A61B 2090/062 20160201 |
International
Class: |
A61B 17/15 20060101
A61B017/15; A61B 17/16 20060101 A61B017/16; A61B 17/17 20060101
A61B017/17; A61B 34/10 20060101 A61B034/10 |
Claims
1.-20. (canceled)
21. A guide for preparing a proximal portion of an elongated bone
for receiving an implant comprising: a body having a
patient-specific three-dimensional bone-engaging surface configured
according to a preoperative plan based on a three-dimensional image
model of the proximal portion of the elongated bone to mate
complementarily with a surface thereof; a resection surface formed
by an edge of the body and positioned thereby, wherein the
resection surface is configured for guiding a resection of a neck
of the elongated bone; and one or more holes defined by the body
and configured to receive one or more pins that mount the guide to
the proximal portion of the elongated bone in a patient-specific
position such that the patient-specific three-dimensional
bone-engaging surface of the body mates complimentary with the
surface of the proximal portion of the elongated bone.
22. The guide of claim 21, wherein the body is configured to extend
around less than an entirety of the proximal portion of the
elongated bone such that the body is configured to engage with one
of an anterior of the surface or a posterior of the surface of the
proximal portion of the elongated bone.
23. The guide of claim 22, wherein at least one of the one or more
holes are positioned adjacent a medial edge of the body.
24. The guide of claim 22, wherein the body is formed as a single
one-piece component.
25. The guide of claim 22, wherein the body is configured to
partially wrap a lateral side and a medial side of the proximal
portion of the elongated bone.
26. The guide of claim 25, wherein the body has a curved medial
flange and a curved lateral flange configured to partially wrap the
medial side and the lateral side, respectively.
27. The guide of claim 21, wherein the body is configured for
viewing of at least a part of the proximal portion of the elongated
bone.
28. The guide of claim 21, wherein the elongated bone comprises a
femur, and wherein the body is configured to extending between a
greater trochanter, a femoral neck and a femoral shaft of the
femoral bone.
29. The guide of claim 21, wherein the elongated bone comprises a
femur, and wherein the resection surface is configured to guide the
resection of a femoral neck along a resection plane, thereby
removing a femoral head and exposing a resected surface of the
femoral neck, wherein the resection plane is selected during
pre-operative planning to conserve healthy bone, adjust or conform
to patient-specific anteversion or other angles and in conformance
with the planned implant for the femoral joint.
30. A method for preparing a proximal femoral bone for an implant
comprising: attaching a femoral guide to the proximal femoral bone,
wherein the femoral guide has a body with a patient-specific
three-dimensional bone-engaging surface configured according to a
preoperative plan based on a three-dimensional image model of the
proximal femoral bone to mate complementarily with a surface
thereof; and guiding a cutting instrument along a resection surface
of the femoral guide to cut a femoral neck of the proximal femoral
bone along a patient-specific plane, wherein the resection surface
is formed by an edge of the femoral guide.
31. The method of claim 30, wherein attaching the femoral guide
includes positioning the body to extend around less than an
entirety of the proximal femoral bone such that the body is
configured to engage with one of an anterior of the surface or a
posterior of the surface of the proximal portion of the elongated
bone.
32. The method of claim 31, wherein the body is configured to
partially wrap a lateral side and a medial side of the proximal
femoral bone.
33. The method of claim 32, wherein the body has a curved medial
flange and a curved lateral flange configured to partially wrap the
medial side and the lateral side, respectively.
34. A guide for preparing a proximal femoral bone for receiving an
implant comprising: a body having a patient-specific
three-dimensional bone-engaging surface configured according to a
preoperative plan based on a three-dimensional image model of the
proximal femoral bone to mate complementarily with a surface
thereof, wherein the body is configured to extend around less than
an entirety of the proximal femoral bone such that the body is
configured to engage with one of an anterior of the surface or a
posterior of the surface of the proximal femoral bone; one or more
holes defined by the body and configured to receive one or more
pins that mount the guide to the proximal femoral bone in a
patient-specific position such that the patient-specific
three-dimensional bone-engaging surface of the body mates
complimentary with the surface of the proximal femoral bone; a
resection surface formed by an edged of the body and positioned
thereby, wherein the resection surface is configured for guiding a
resection of a neck of the proximal femoral bone along a resection
plane, thereby removing a femoral head and exposing a resected
surface of the femoral neck, and wherein the resection plane is
selected during pre-operative planning to conserve healthy bone,
adjust or conform to patient-specific anteversion or other angles
and in conformance with the planned implant for the femoral
joint.
35. The guide of claim 34, wherein at least one of the one or more
holes are positioned adjacent a medial edge of the body.
36. The guide of claim 34, wherein the body is formed as a single
one-piece component.
37. The guide of claim 34, wherein the body is configured to
partially wrap a lateral side and a medial side of the proximal
femoral bone.
38. The guide of claim 37, wherein the body has a curved medial
flange and a curved lateral flange configured to partially wrap the
medial side and the lateral side, respectively.
39. The guide of claim 34, wherein the body is configured for
viewing of at least a part of the proximal femoral bone.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of U.S. Provisional
Application No. 61/446,660, filed on Feb. 25, 2011.
[0002] This application is a continuation-in-part of U.S.
application Ser. No. 12/978,069 filed Dec. 23, 2010, which is a
continuation-in-part of U.S. application Ser. No. 12/973,214, filed
Dec. 20, 2010, which is a continuation-in-part of U.S. application
Ser. No. 12/955,361 filed Nov. 29, 2010, which is a
continuation-in-part of U.S. application Ser. Nos. 12/938,905 and
12/938,913, both filed Nov. 3, 2010, and which are
continuation-in-part of U.S. application Ser. No. 12/893,306, filed
Sep. 29, 2010, which is a continuation-in-part of U.S. application
Ser. No. 12/888,005, filed Sep. 22, 2010, which is a
continuation-in-part of U.S. application Ser. No. 12/714,023, filed
Feb. 26, 2010, which is a continuation-in-part of U.S. application
Ser. No. 12/571,969, filed Oct. 1, 2009, which is a
continuation-in-part of U.S. application Ser. No. 12/486,992, filed
Jun. 18, 2009, and a continuation-in-part of U.S. application Ser.
No. 12/389,901, filed Feb. 20, 2009, which is a
continuation-in-part of U.S. application Ser. No. 12/211,407, filed
Sep. 16, 2008, which is a continuation-in-part of U.S. application
Ser. No. 12/039,849, filed Feb. 29, 2008, which: (1) claims the
benefit of U.S. Provisional Application No. 60/953,620, filed on
Aug. 2, 2007, U.S. Provisional Application No. 60/947,813, filed on
Jul. 3, 2007, U.S. Provisional Application No. 60/911,297, filed on
Apr. 12, 2007, and U.S. Provisional Application No. 60/892,349,
filed on Mar. 1, 2007; (2) is a continuation-in-part U.S.
application Ser. No. 11/756,057, filed on May 31, 2007, which
claims the benefit of U.S. Provisional Application No. 60/812,694,
filed on Jun. 9, 2006; (3) is a continuation-in-part of U.S.
application Ser. No. 11/971,390, filed on Jan. 9, 2008, which is a
continuation-in-part of U.S. application Ser. No. 11/363,548, filed
on Feb. 27, 2006, now U.S. Pat. No. 7,780,672 issued Aug. 24, 2010;
and (4) is a continuation-in-part of U.S. application Ser. No.
12/025,414, filed on Feb. 4, 2008, which claims the benefit of U.S.
Provisional Application No. 60/953,637, filed on Aug. 2, 2007.
[0003] This application is continuation-in-part of U.S. application
Ser. No. 12/872,663, filed on Aug. 31, 2010, which claims the
benefit of U.S. Provisional Application No. 61/310,752 filed on
Mar. 5, 2010.
[0004] This application is a continuation-in-part of U.S.
application Ser. No. 12/483,807, filed on Jun. 12, 2009, which is a
continuation-in-part of U.S. application Ser. No. 12/371,096, filed
on Feb. 13, 2009, which is a continuation-in-part of U.S.
application Ser. No. 12/103,824, filed on Apr. 16, 2008, which
claims the benefit of U.S. Provisional Application No. 60/912,178,
filed on Apr. 17, 2007.
[0005] This application is also a continuation-in-part of U.S.
application Ser. No. 12/103,834, filed on Apr. 16, 2008, which
claims the benefit of U.S. Provisional Application No. 60/912,178,
filed on Apr. 17, 2007.
[0006] The disclosures of the above applications are incorporated
herein by reference.
INTRODUCTION
[0007] The present teachings provide a patient-specific alignment
and resection guide and associated tools for guiding a resection of
the femoral neck and aligning a broach or other cutting instrument
or tool along the proximal femur in preparation for a femoral
implant.
SUMMARY
[0008] The present teachings provide a medical device for preparing
an elongated bone, such as a femoral bone, for receiving an
implant. The medical device includes a patient-specific femoral
guide and an elongated alignment element. The femoral guide has a
patient-specific three-dimensional bone-engaging surface configured
according to a preoperative plan based on a three-dimensional image
model of a proximal femoral bone to mate complementarily with the
surface of the proximal femoral bone extending between the greater
trochanter, the femoral neck and the femoral shaft of the proximal
femur. The femoral guide includes a first guide end forming a
planar guide configured for guiding a neck resection. The alignment
member can be removably attached to the femoral guide. The
alignment member defines a reference axis for guiding a cutting
tool into the femoral bone through a resected surface of the
femoral neck.
[0009] In some embodiments, the medical device includes a cutting
tool, such as a broach or reamer, for example, for preparing the
proximal femoral bone after the neck resection, a driver tool for
holding and driving the cutting tool into the femoral bone along a
first axis, and a connector. The connector can be slidably coupled
to the alignment member and to the driver tool. The connector has a
patient-specific distance between the first axis and reference axis
for guiding the cutting tool into the femoral bone through a
resected surface of the femoral neck at a position determined
during a preoperative plan based on the three-dimensional image
model of the femoral bone.
[0010] The present teachings provide a method for preparing a
proximal femoral bone for an implant. The method includes attaching
a patient-specific femoral guide to the proximal femoral bone,
guiding a cutting instrument along a planar cutting guide of the
femoral guide, and cutting the femoral neck along a
patient-specific plane using the cutting guide. The method also
includes coupling a cutting tool to a driver tool, and slidably
connecting the driver tool to an alignment member extending from
the patient-specific guide along a reference axis such that the
cutting tool is automatically positioned at a preselected distance
from the reference axis and at a preselected location relative to
the resected femoral neck. The method includes preparing the
femoral bone for receiving an implant using the cutting tool.
[0011] Further areas of applicability of the present teachings will
become apparent from the description provided hereinafter. It
should be understood that the description and specific examples are
intended for purposes of illustration only and are not intended to
limit the scope of the present teachings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present teachings will become more fully understood from
the detailed description and the accompanying drawings,
wherein:
[0013] FIG. 1 is an environmental view of a patient-specific
femoral guide according to the present teachings;
[0014] FIG. 1A is a perspective view of an exemplary femoral guide
according to the present teachings;
[0015] FIG. 1B is a perspective view of another exemplary femoral
guide according to the present teachings;
[0016] FIG. 2 is an environmental view of the patient-specific
femoral guide of FIG. 1 shown with a driver holder and a cutting
tool;
[0017] FIG. 3. is a side view of the driver holder for the cutting
tool of FIG. 2; and
[0018] FIG. 4 is a side view of the cutting tool of FIG. 2.
DESCRIPTION OF VARIOUS ASPECTS
[0019] The following description is merely exemplary in nature and
is in no way intended to limit the present teachings, applications,
or uses.
[0020] The present teachings provide a patient-specific alignment
and resection guide and associated tools for guiding a resection of
the femoral neck and aligning a broach or other cutting tool along
the proximal femur in preparation for receipt of a femoral
implant.
[0021] As described in commonly assigned U.S. application Ser. No.
11/756,057, filed on May 31, 2007, during a preoperative planning
stage, imaging data of the relevant anatomy of a patient can be
obtained at a medical facility or doctor's office. The imaging data
can include, for example, a detailed scan of a pelvis, hip, knee,
ankle or other joint or relevant portion of the patient's anatomy.
The imaging data can be obtained using MRI, CT, X-Ray, ultrasound
or any other imaging system. The imaging data obtained can be used
to construct a three-dimensional computer image of the joint and
prepare an initial pre-operative plan that can include bone or
joint preparation, including planning for resections, milling,
reaming, broaching, cutting, implant selection and fitting, design
of patient-specific guides, templates, tools and alignment protocol
for the surgical procedure.
[0022] Computer modeling for obtaining three-dimensional computer
images of the relevant patient's anatomy can be provided by various
CAD programs and/or software available from various vendors or
developers, such as, for example, from Materialise USA, Ann Arbor,
Mich. The computer modeling program can be used to plan a
preoperative surgical plan, including planning various bone
preparation procedures, selecting or designing/modifying implants
and designing patient-specific guides and tools including
patient-specific prosthesis components, and patient-specific tools,
including reaming, broaching, milling, drilling or other cutting
tools, alignment guides, templates and other patient-specific
instruments.
[0023] The pre-operative plan can be stored in any computer storage
medium, in a computer file form or any other computer or digital
representation. The pre-operative plan, in a digital form
associated with interactive software, can be made available via a
hard medium, a web-based or mobile or cloud service, or a cellular
portable device to the surgeon or other medical practitioner, for
review. Using the interactive software, the surgeon can review the
plan, and manipulate the position of images of various implant
components relative to an image of the anatomy. The surgeon can
modify the plan and send it to the manufacturer with
recommendations or changes. The interactive review process can be
repeated until a final, approved plan, is sent to a manufacturing
facility for preparing the actual physical components.
[0024] After the surgical plan is approved by the surgeon,
patient-specific implants and associated tools, including, for
example, alignment guides, cutting/milling/reaming/broaching or
other tools for the surgical preparation of the joint or other
anatomy portion of the specific patient can be designed using a CAD
program or other three-dimensional modeling software, such as the
software provided by Materialise, for example, according to the
surgical plan. Patient-specific guides and other instruments can be
manufactured by various stereolithography methods, selective laser
sintering, fused deposition modeling or other rapid prototyping
methods. In some embodiments, computer instructions of tool paths
for machining the patient-specific guides and/or implants can be
generated and stored in a tool path data file. The tool path data
can be provided as input to a CNC mill or other automated machining
system, and the tools and implants can be machined from polymer,
ceramic, metal or other suitable material depending on the use, and
sterilized. The sterilized tools and implants can be shipped to the
surgeon or medical facility for use during the surgical
procedure.
[0025] Patient-specific implants, guides, templates, tools or
portions thereof are defined as those constructed by a surgical
plan approved by the surgeon using three-dimensional images of the
specific patient's anatomy. These patient-specific components have
a three-dimensional engagement surface that is made to closely
conform, contact and mate substantially as a negative mold of
corresponding complementary portions of the patient's anatomy. The
complementary anatomy can include bone surfaces with or without
associated soft tissue, such as articular cartilage, for example,
and inner surfaces of different bone density, such as cancellous
and cortical bone.
[0026] Referring to FIGS. 1 and 2, an exemplary patient-specific
femoral guide 100 for a proximal femur 80 is illustrated. The
femoral guide 100 is designed to have a three-dimensional
patient-specific bone engagement surface 102 designed during the
pre-operative plan from the three-dimensional image of the specific
patient's hip joint with or without associated cartilage or other
soft tissue. The femoral guide 100 can be in the form of a thin
curved shell 101 having a first guide end 104 or guide side 104 (in
the form of a slot or an edge, as discussed below) forming a planar
resection guide for resecting the femoral neck 84 at a location and
orientation relative to first and second reference axes A and B
along a resection plane R and creating a resected surface 88. The
location and orientation of the resection plane R is determined in
the pre-operative plan using the three-dimensional image of the
patient's joint to conserver bone, remove abnormalities, conform to
or correct anteversion angle or other orientation of the femoral
neck.
[0027] Referring to FIGS. 1 and 1A, the shell 101 can be in the
form of a two-piece clamshell with couplable anterior and posterior
components 103a, 103b that can engage the anterior and posterior
surfaces of the proximal femur 80 with corresponding
patient-specific engagement surfaces 102 to nestingly and securedly
engage the bone. The shell 101 can include a second end side 106
defining an opening for a greater trochanter 82 and a third end
side 108 defining an opening for a femoral bone shaft 90.
Similarly, the first guide end 104 can be in the form of an opening
defining an annular resection plane or guide R. The edge of the
first guide end 104 can be made thicker or reinforced or with an
added flange for additional stability during resection. The shell
101 can be additionally secured to the proximal femur 80 with one
or more bone screws or pins 116 passing through a hole 112. The
anterior and posterior components 103a, 103b can be movable
connected, for example, along a lateral side 107 with a hinge or
other connector 111 permitting pivoting, clamping, snap-on or other
connection. The anterior and posterior components 103a, 103b can be
connected to one another or to the bone with fasteners or pins
passing through holes 113' along the opposite or medial side 109,
or with a snap-on or other connection to one another.
[0028] Alternatively, the shell 101 can include a single one-piece
component 103, which can be attached to only the anterior (or only
the posterior) surface of the proximal femur 80 with bone fasteners
or pins inserted through hole 112 and other corresponding holes, as
discussed above. In the embodiment in which the shell 101 includes
a single component 103, as shown in FIG. 1B, the single component
103 can partially wrap around from the lateral and medial sides
107, 107 toward the posterior (or anterior) surface of the proximal
femur 80 along curved lateral and medial flanges 117 and 119. In
the single-component embodiment, the first guide end 104, second
end side 106 and third end side 108 can be in the form of edges or
partial openings or slots, rather than openings with a closed
periphery. Additional holes 113' and 113'' can be used for
fastening the alignment guide 100 to the lateral and medial sides
107, 109.
[0029] With the femoral guide 100 secured on the proximal femur 80,
a cutting blade or saw or other surgical instrument can be guided
by the first guide end 104 to cut the femoral neck 84 along a
resection plane R, thereby removing the femoral head 86 and
exposing the resected surface 88 of the femoral neck 84, as shown
in FIGS. 1 and 2. After resection, the femoral guide 100 can be
used to guide instruments for preparing the proximal femur 80 for a
femoral implant, as discussed below. As discussed above, the
resection plane R is selected during pre-operative planning to
conserve healthy bone, adjust or conform to patient-specific
anteversion or other angles and in conformance with the planned
implants for the femoral joint. When the femoral guide 100 is
attached to the femur intra-operatively, the resection plane R is
automatically determined by the first guide end side 104.
[0030] The femoral guide 100 can include an elongated alignment
member 130, such as a rod or bar, which can be attached to the
shell 101 with bolts, screws, clamps or other fasteners 114 at a
portion 115 of the shell 101 between the first and second end sides
104, 106 of the shell 101 and through holes 133 of the alignment
member 130. The attachment position of the alignment member 130 at
portion 115 is determined during the pre-operative plan and such
that the alignment member 130 defines a reference axis A, when the
shell 101 is attached to the proximal femur 80. The reference axis
A can coincide or be parallel to the intramedullary axis of the
femoral shaft 90, as shown in FIGS. 1 and 2 and can be used to
reference the position for a cutting tool or broach 200 for
preparing the proximal femur 80 to receive a femoral and
intramedullary implant, as discussed below. In this regard, the
alignment member 130 can include a scale 138 for showing the
advance or position and insertion level of the broach 200 relative
to the bone, and a stop element 132 indicating when a full seated
position of the broach 200 is reached and broaching is completed.
The alignment member 130 can be either permanently or removably
attached to the femoral guide 100, such that the alignment member
130 can be optionally attached to the femoral guide 100 after the
femoral head 86 is resected using the femoral guide 100. The
alignment member can have a round cross-section, or alternatively,
a rectangular or otherwise keyed cross-section, as discussed
below.
[0031] Referring to FIG. 2, a driver tool 300 for holding a broach
or reamer or other cutting tool 200 can be slidably coupled to the
alignment member 130 using a connector 134. The connector 134 is
designed during the pre-operative plan to locate the driver tool
300 and the broach 200 at a preselected distance and orientation
relative to the reference axis A, such that the broach 200 can
automatically engage the resected surface 88 of the femoral neck 84
at a location and orientation determined during the pre-operative
plan. For example, when the connector 134 is coupled between the
alignment member 130 and the driver tool 300, a distance D between
the reference axis A and a longitudinal axis C of the driver tool
300 equals a value determined during the pre-operative plan for
positioning the broach 200 in a pre-planned position and
orientation for preparing the proximal femur 80 to receive an
implant. When the connector 134 reaches the stop 132, the sliding
motion of the connector 134, the driver tool 300 and the broach 200
is arrested and depth is limited to the desired depth to
accommodate a pre-determined positioning of an implant according to
the pre-operative plan. The alignment member 130 can be
rotationally keyed to the connector 134 to allow motion only along
the reference axis A, i.e., to prevent or reduce any rotational
instabilities during use. For rotational stability, other than
circular cross-sections for the alignment member 130 can be used,
such as, oval, triangular or polygonal, for example.
[0032] The connector 134 can be an elongated element, such as a
bar, having an opening 136 for receiving the alignment member 130
therethrough. The connector 134 can be coupled to the driver tool
300 with a clamp, bolt, screw, snap fit, forked end connector or
other coupling device 137.
[0033] Referring to FIG. 4, the broach 200 can include have a body
201 with an outer peripheral three-dimensional cutting surface 202
extending from a proximal end surface 204 to a distal end surface
210 of the body 201. The cutting surface 202 is provided with
cutting teeth and channels or grooves 211 for moving bone chips
away from the cavity created by the broach 200.
[0034] Referring to FIGS. 2-4, the broach 200 can be coupled to the
driver tool 300 by providing a coupling interface between the
proximal end surface 204 of the broach and a distal surface 314 of
the driver tool 300. The coupling interface can include, for
example, a finger or rod or other protrusion 208 extending from the
proximal end surface 204 of the broach 200 to be received in a
corresponding bore or other opening 312 defined through the distal
surface 314 of the driver tool 300. The coupling interface can also
include an opening or bore 206 defined through the proximal end
surface 204 of the broach 200 for receiving a distal portion 316 of
a retractable bar or rod 310 of the driver tool 300. The driver
tool 300 can include a body 302, a handle bar 304, and a proximal
flange 318 for impaction. The retractable rod 310 can extend along
the body 302 and is biased by a proximal spring 308. The
retractable rod 310 can be deployed for engaging the broach 200 by
using a trigger 306 which can be operated by holding with one hand
the handle bar 304 and squeezing the trigger opening 305 with an
index finger and move the broach 200 form a first to a second
position along the axis C. The broach 200 can be held securely with
the driver tool 300, as shown in FIG. 2 and inserted through the
resected surface 88 the femoral neck 84 to prepare the femoral bone
80 for receiving a femoral implant. The depth of insertion of the
broach 200 can be monitored by the scale 138 and the broach 200 can
be removed after the connector 134 reaches the stop 132. In some
embodiments, the broach 200 can be patient-specific and designed
during the pre-operative plan to conform to an inner boundary
surface of the femur, which is imaged and selected during the
pre-operative plan.
[0035] The patient-specific femoral guide 100 can be manufactured
from biocompatible materials using machining, rapid manufacturing
by stereolithography, laser welding, or computer-assisted
manufacturing using numerical machining or robotic controllers.
[0036] The foregoing discussion discloses and describes merely
exemplary arrangements of the present teachings. Furthermore, the
mixing and matching of features, elements and/or functions between
various embodiments is expressly contemplated herein, so that one
of ordinary skill in the art would appreciate from this disclosure
that features, elements and/or functions of one embodiment may be
incorporated into another embodiment as appropriate, unless
described otherwise above. Moreover, many modifications may be made
to adapt a particular situation or material to the present
teachings without departing from the essential scope thereof. One
skilled in the art will readily recognize from such discussion, and
from the accompanying drawings and claims, that various changes,
modifications and variations can be made therein without departing
from the spirit and scope of the present teachings as defined in
the following claims.
* * * * *