CA3107331A1 - Kits and method for forming a keel-receiving recess in a patient's proximal tibia during a knee arthroplasty procedure - Google Patents
Kits and method for forming a keel-receiving recess in a patient's proximal tibia during a knee arthroplasty procedureInfo
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- CA3107331A1 CA3107331A1 CA3107331A CA3107331A CA3107331A1 CA 3107331 A1 CA3107331 A1 CA 3107331A1 CA 3107331 A CA3107331 A CA 3107331A CA 3107331 A CA3107331 A CA 3107331A CA 3107331 A1 CA3107331 A1 CA 3107331A1
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Abstract
ABSTRACT
There is provided a keel recess forming kit for forming a keel-receiving recess in a resected tibia portion of a patient's tibia during a knee arthroplasty procedure, the keel-receiving recess being sized and shaped for receiving a keel of a tibial component. The kit comprises: a keel recess forming tool having a bone-engaging end portion; and a tool guide for guiding the keel recess forming tool into the tibia.
Date Recue/Date Received 2021-01-28
There is provided a keel recess forming kit for forming a keel-receiving recess in a resected tibia portion of a patient's tibia during a knee arthroplasty procedure, the keel-receiving recess being sized and shaped for receiving a keel of a tibial component. The kit comprises: a keel recess forming tool having a bone-engaging end portion; and a tool guide for guiding the keel recess forming tool into the tibia.
Date Recue/Date Received 2021-01-28
Description
KITS AND METHOD FOR FORMING A KEEL-RECEIVING RECESS IN A
PATIENT'S PROXIMAL TIBIA DURING A KNEE ARTHROPLASTY
PROCEDURE
TECHNICAL FIELD
The technical field generally relates to knee arthroplasties, and more specifically to kits for forming a keel-receiving recess in a patient's proximal tibia during a knee arthroplasty and to methods for performing a knee arthroplasty.
BACKGROUND
A partial knee arthroplasty, also known as a unicompartmental knee arthroplasty or partial knee replacement, involves the removal and replacement of damaged bone portions from a patient's knee joint with an implant which includes a tibial component attached to the patient's tibia and a femoral component attached to the patient's femur. Specifically, in a partial knee arthroplasty, bone portions from only one of the patient's tibial compartment and corresponding femoral compartment are removed and replaced with the tibial and femoral components. The bone portion is removed from the tibial compartment by resecting the tibial compartment.
The resected portion of the tibia defines a tibial plateau which extends generally parallel to a transverse plane of the patient's body and a sagittal face which extends generally parallel to a sagittal plane of the patient's body. A bone portion is further removed from the femoral compartment opposite the resected portion of the tibia and a femoral component of the implant is attached to the femur. The femoral component is adapted to slide against the tibial component to reproduce the natural articulation of the knee joint.
In some cases, the tibial component may be provided with a stem or keel which extends away from a planar bone-facing surface of the tibial component. The keel Date Recue/Date Received 2021-01-28
PATIENT'S PROXIMAL TIBIA DURING A KNEE ARTHROPLASTY
PROCEDURE
TECHNICAL FIELD
The technical field generally relates to knee arthroplasties, and more specifically to kits for forming a keel-receiving recess in a patient's proximal tibia during a knee arthroplasty and to methods for performing a knee arthroplasty.
BACKGROUND
A partial knee arthroplasty, also known as a unicompartmental knee arthroplasty or partial knee replacement, involves the removal and replacement of damaged bone portions from a patient's knee joint with an implant which includes a tibial component attached to the patient's tibia and a femoral component attached to the patient's femur. Specifically, in a partial knee arthroplasty, bone portions from only one of the patient's tibial compartment and corresponding femoral compartment are removed and replaced with the tibial and femoral components. The bone portion is removed from the tibial compartment by resecting the tibial compartment.
The resected portion of the tibia defines a tibial plateau which extends generally parallel to a transverse plane of the patient's body and a sagittal face which extends generally parallel to a sagittal plane of the patient's body. A bone portion is further removed from the femoral compartment opposite the resected portion of the tibia and a femoral component of the implant is attached to the femur. The femoral component is adapted to slide against the tibial component to reproduce the natural articulation of the knee joint.
In some cases, the tibial component may be provided with a stem or keel which extends away from a planar bone-facing surface of the tibial component. The keel Date Recue/Date Received 2021-01-28
2 is received in a corresponding keel-receiving recess extending into the tibial plateau to thereby locate the tibial component at a desired position on the tibial plateau. The keel is further sized and shaped to maintain the tibial component in its desired position by resisting efforts applied to the tibial component during use.
The keel-receiving recess must therefore be formed in the tibia after the resection of the tibia but before the attachment of the tibial component to the tibia.
Several solutions have been proposed to form the keel-receiving recess. However, most existing solutions are imprecise, impractical or relatively complex.
SUMMARY
According to one aspect, there is provided a keel recess forming kit for forming a keel-receiving recess in a resected tibia portion of a patient's tibia during a knee arthroplasty procedure, which can be a partial knee arthroplasty procedure, the keel-receiving recess being sized and shaped for receiving a keel of a tibial component, the resected tibia portion having a first tibia planar face and a second tibia planar face extending at an angle relative to the first tibia planar face, the kit comprising: a keel recess forming tool having a bone-engaging end portion; and a tool guide for guiding the keel recess forming tool into the tibia, the tool guide including: a guide body having a tool-engaging face, a first planar bone-contacting face opposite the tool-engaging face and a second planar bone-contacting face adjacent to the first planar bone contacting face and angled relative thereto, the first and second planar bone-contacting faces being abuttable respectively against the first and second tibia planar faces to position the body at a desired position in the resected tibia portion, the guide body further comprising a guiding channel extending therethrough between the tool-engaging face and the first planar bone-contacting face and along a channel axis, the guiding channel being opened on the second planar bone-contacting face, the guiding channel being sized and shaped for slidably receiving the bone-engaging end portion of the keel recess forming tool to guide the bone-engaging end portion along the channel axis when Date Recue/Date Received 2021-01-28
The keel-receiving recess must therefore be formed in the tibia after the resection of the tibia but before the attachment of the tibial component to the tibia.
Several solutions have been proposed to form the keel-receiving recess. However, most existing solutions are imprecise, impractical or relatively complex.
SUMMARY
According to one aspect, there is provided a keel recess forming kit for forming a keel-receiving recess in a resected tibia portion of a patient's tibia during a knee arthroplasty procedure, which can be a partial knee arthroplasty procedure, the keel-receiving recess being sized and shaped for receiving a keel of a tibial component, the resected tibia portion having a first tibia planar face and a second tibia planar face extending at an angle relative to the first tibia planar face, the kit comprising: a keel recess forming tool having a bone-engaging end portion; and a tool guide for guiding the keel recess forming tool into the tibia, the tool guide including: a guide body having a tool-engaging face, a first planar bone-contacting face opposite the tool-engaging face and a second planar bone-contacting face adjacent to the first planar bone contacting face and angled relative thereto, the first and second planar bone-contacting faces being abuttable respectively against the first and second tibia planar faces to position the body at a desired position in the resected tibia portion, the guide body further comprising a guiding channel extending therethrough between the tool-engaging face and the first planar bone-contacting face and along a channel axis, the guiding channel being opened on the second planar bone-contacting face, the guiding channel being sized and shaped for slidably receiving the bone-engaging end portion of the keel recess forming tool to guide the bone-engaging end portion along the channel axis when Date Recue/Date Received 2021-01-28
3 the bone-engaging end portion is received in the guiding channel and is moved towards the tibia.
In at least one embodiment, the guiding channel is oriented such that the channel axis extends substantially parallel to the second planar bone-contacting face.
.. In at least one embodiment, the keel recess forming tool further includes a tool handle end portion extending away from the bone-engaging end portion and an abutment located between the tool end portion and the bone-engaging end portion, the abutment being abuttable with the tool guide to prevent further movement of the bone-engaging end portion towards the tibia when the bone-engaging end portion is received in the guiding channel.
In at least one embodiment, the tool guide further includes a stopping projection extending away from the tool-engaging face of the guide body and along the channel axis, the stopping projection having a distal sleeve end located away from the tool-engaging face, the distal sleeve end being abuttable with the abutment of the keel recess forming tool.
In at least one embodiment, the bone-engaging end portion has a first cross-sectional dimension and the handle end portion has a second cross-sectional dimension greater than the first cross-section dimension to form a shoulder between the bone-engaging and handle end portions, the shoulder defining the abutment.
In at least one embodiment, the guide body includes at least one fastener bore extending between the tool-engaging face and the first planar bone-contacting face, each fastener bore being sized and shaped for receiving a fastener to removably secure the tool guide to the tibia.
.. In at least one embodiment, the guide body includes at least one drill guiding bore extending between the tool-engaging face and the first planar bone-contacting face, each drill guiding bore being sized and shaped to guide a drill bit for drilling Date Recue/Date Received 2021-01-28
In at least one embodiment, the guiding channel is oriented such that the channel axis extends substantially parallel to the second planar bone-contacting face.
.. In at least one embodiment, the keel recess forming tool further includes a tool handle end portion extending away from the bone-engaging end portion and an abutment located between the tool end portion and the bone-engaging end portion, the abutment being abuttable with the tool guide to prevent further movement of the bone-engaging end portion towards the tibia when the bone-engaging end portion is received in the guiding channel.
In at least one embodiment, the tool guide further includes a stopping projection extending away from the tool-engaging face of the guide body and along the channel axis, the stopping projection having a distal sleeve end located away from the tool-engaging face, the distal sleeve end being abuttable with the abutment of the keel recess forming tool.
In at least one embodiment, the bone-engaging end portion has a first cross-sectional dimension and the handle end portion has a second cross-sectional dimension greater than the first cross-section dimension to form a shoulder between the bone-engaging and handle end portions, the shoulder defining the abutment.
In at least one embodiment, the guide body includes at least one fastener bore extending between the tool-engaging face and the first planar bone-contacting face, each fastener bore being sized and shaped for receiving a fastener to removably secure the tool guide to the tibia.
.. In at least one embodiment, the guide body includes at least one drill guiding bore extending between the tool-engaging face and the first planar bone-contacting face, each drill guiding bore being sized and shaped to guide a drill bit for drilling Date Recue/Date Received 2021-01-28
4 a peg receiving hole in the tibia for receiving a corresponding peg of the tibial corn ponent.
In at least one embodiment, the tool guide further includes a handle extending away from the body for handling the guiding apparatus.
In at least one embodiment, the handle is elongated and extends along a handle axis parallel to both the first and second planar bone-contacting faces.
In at least one embodiment, the guiding channel is oriented such that the channel axis is angled at an acute angle relative to the planar bone-contacting face.
According to another aspect, there is also provided a tool guide for guiding a keel recess forming tool into a patient's tibia during a knee arthroplasty procedure, which can be a partial knee arthroplasty procedure, the tibia including a resected tibia portion having a first tibia planar face and a second tibia planar face extending at an angle relative to the first tibia planar face, the tool guide comprising: a guide body having a tool-engaging face, a first planar bone-contacting face opposite the tool-engaging face and a second planar bone-contacting face adjacent to the first planar bone contacting face and angled relative thereto, the first and second planar bone-contacting faces being abuttable respectively against the first and second tibia planar faces to position the body at a desired position in the resected tibia portion; the guide body further comprising a guiding channel extending therethrough between the tool-engaging face and the first planar bone-contacting face and along a channel axis, the guiding channel being opened on the second planar bone-contacting face, the guiding channel being sized and shaped for slidably receiving a bone-engaging end portion of the keel recess forming tool to guide the bone-engaging end portion along the channel axis when the bone-.. engaging end portion is received in the guiding channel and is moved towards the tibia.
In at least one embodiment, the guiding channel is oriented such that the channel axis is substantially parallel to the second planar bone-contacting face.
Date Recue/Date Received 2021-01-28
In at least one embodiment, the tool guide further includes a handle extending away from the body for handling the guiding apparatus.
In at least one embodiment, the handle is elongated and extends along a handle axis parallel to both the first and second planar bone-contacting faces.
In at least one embodiment, the guiding channel is oriented such that the channel axis is angled at an acute angle relative to the planar bone-contacting face.
According to another aspect, there is also provided a tool guide for guiding a keel recess forming tool into a patient's tibia during a knee arthroplasty procedure, which can be a partial knee arthroplasty procedure, the tibia including a resected tibia portion having a first tibia planar face and a second tibia planar face extending at an angle relative to the first tibia planar face, the tool guide comprising: a guide body having a tool-engaging face, a first planar bone-contacting face opposite the tool-engaging face and a second planar bone-contacting face adjacent to the first planar bone contacting face and angled relative thereto, the first and second planar bone-contacting faces being abuttable respectively against the first and second tibia planar faces to position the body at a desired position in the resected tibia portion; the guide body further comprising a guiding channel extending therethrough between the tool-engaging face and the first planar bone-contacting face and along a channel axis, the guiding channel being opened on the second planar bone-contacting face, the guiding channel being sized and shaped for slidably receiving a bone-engaging end portion of the keel recess forming tool to guide the bone-engaging end portion along the channel axis when the bone-.. engaging end portion is received in the guiding channel and is moved towards the tibia.
In at least one embodiment, the guiding channel is oriented such that the channel axis is substantially parallel to the second planar bone-contacting face.
Date Recue/Date Received 2021-01-28
5 In at least one embodiment, the tool guide further includes a tool receiving sleeve extending away from the tool-engaging face of the guide body and along the channel axis, the tool receiving sleeve having a proximal sleeve end adjacent the tool-engaging face and a distal sleeve end located away from the tool-engaging face, the distal sleeve end being abuttable with an abutment of the keel recess forming tool to prevent further movement of the bone-engaging end portion of the keel recess forming tool towards the tibia when the bone-engaging end portion is received in the guiding channel.
In at least one embodiment, the guide body includes at least one fastener bore extending between the tool-engaging face and the first planar bone-contacting face, each fastener bore being sized and shaped for receiving a fastener to removably secure the tool guide to the tibia.
In at least one embodiment, the guide body includes at least one drill guiding bore extending between the tool-engaging face and the first planar bone-contacting face, each drill guiding bore being sized and shaped to guide a drill bit for drilling a peg receiving hole in the tibia for receiving a corresponding peg of the tibial component.
In at least one embodiment, the tool guide further includes a handle extending away from the body for handling the guiding apparatus.
In at least one embodiment, the handle is elongated and extends along a handle axis parallel to both the first and second planar bone-contacting faces.
In at least one embodiment, the guiding channel is oriented such that the channel axis is angled at an acute angle relative to the planar bone-contacting face.
According to yet another aspect, there is also provided a surgical kit for performing a knee arthroplasty procedure, which can be a partial knee arthroplasty procedure, on a patient's tibia, the tibia including a resected tibia portion having a first tibia planar face and a second tibia planar face extending at an angle relative to the first tibia planar face, the kit comprising: a tibial component having a bone-engaging Date Recue/Date Received 2021-01-28
In at least one embodiment, the guide body includes at least one fastener bore extending between the tool-engaging face and the first planar bone-contacting face, each fastener bore being sized and shaped for receiving a fastener to removably secure the tool guide to the tibia.
In at least one embodiment, the guide body includes at least one drill guiding bore extending between the tool-engaging face and the first planar bone-contacting face, each drill guiding bore being sized and shaped to guide a drill bit for drilling a peg receiving hole in the tibia for receiving a corresponding peg of the tibial component.
In at least one embodiment, the tool guide further includes a handle extending away from the body for handling the guiding apparatus.
In at least one embodiment, the handle is elongated and extends along a handle axis parallel to both the first and second planar bone-contacting faces.
In at least one embodiment, the guiding channel is oriented such that the channel axis is angled at an acute angle relative to the planar bone-contacting face.
According to yet another aspect, there is also provided a surgical kit for performing a knee arthroplasty procedure, which can be a partial knee arthroplasty procedure, on a patient's tibia, the tibia including a resected tibia portion having a first tibia planar face and a second tibia planar face extending at an angle relative to the first tibia planar face, the kit comprising: a tibial component having a bone-engaging Date Recue/Date Received 2021-01-28
6 face for engaging the first tibia planar face and a keel extending away from the bone-engaging face; a keel recess forming tool having a bone-engaging end portion; a tool guide for guiding the keel recess forming tool into the tibia, the tool guide including: a guide body having a tool-engaging face, a first planar bone-contacting face opposite the tool-engaging face and a second planar bone-contacting face adjacent to the first planar bone contacting face and angled relative thereto, the first and second planar bone-contacting faces being abuttable respectively against the first and second tibia planar faces to position the body at a desired position in the resected tibia portion, the guide body further comprising a guiding channel extending therethrough between the tool-engaging face and the first planar bone-contacting face and along a channel axis, the guiding channel being opened on the second planar bone-contacting face, the guiding channel being sized and shaped for slidably receiving the bone-engaging end portion of the keel recess forming tool to guide the bone-engaging end portion along the channel axis when the bone-engaging end portion is received in the guiding channel and is moved towards the tibia.
According to yet another aspect, there is also provided a method for forming a keel-receiving recess in a patient's tibia during a knee arthroplasty procedure, which can be a partial knee arthroplasty procedure, the tibia including a resected tibia portion having a first tibia planar face and a second tibia planar face extending at an angle relative to the first tibia planar face, the method comprising:
positioning a tool guide within the resected portion of the tibia such that a first planar bone-contacting face of the tool guide abuts the first tibia planar face and a second planar bone-contacting face of the tool guide abuts the second tibia planar face;
inserting a bone-engaging end portion of a keel recess forming tool in a guiding channel of the tool guide, the guiding channel extending between the first planar bone-contacting face and a tool-engaging face opposite the first planar bone-contacting face and along a channel axis, the bone-engaging end portion of a keel recess forming tool having opposed lateral faces with a first one of the lateral faces contacting the tool guide and a second one of the lateral faces contacting the second tibia planar face of the tibia; slidably moving the keel recess forming tool Date Recue/Date Received 2021-01-28
According to yet another aspect, there is also provided a method for forming a keel-receiving recess in a patient's tibia during a knee arthroplasty procedure, which can be a partial knee arthroplasty procedure, the tibia including a resected tibia portion having a first tibia planar face and a second tibia planar face extending at an angle relative to the first tibia planar face, the method comprising:
positioning a tool guide within the resected portion of the tibia such that a first planar bone-contacting face of the tool guide abuts the first tibia planar face and a second planar bone-contacting face of the tool guide abuts the second tibia planar face;
inserting a bone-engaging end portion of a keel recess forming tool in a guiding channel of the tool guide, the guiding channel extending between the first planar bone-contacting face and a tool-engaging face opposite the first planar bone-contacting face and along a channel axis, the bone-engaging end portion of a keel recess forming tool having opposed lateral faces with a first one of the lateral faces contacting the tool guide and a second one of the lateral faces contacting the second tibia planar face of the tibia; slidably moving the keel recess forming tool Date Recue/Date Received 2021-01-28
7 along the channel axis and towards the tibia until the keel recess forming tool is inserted into the tibia at a desired depth to thereby form the keel-receiving recess in the tibia.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a proximal portion of a patient's tibia and a keel recess forming kit including a keel recess forming tool and a tool guide, in accordance with one embodiment, with the tool guide positioning in a resected tibia portion of the patient's tibia and the keel recess forming tool engaging a guiding channel of the tool guide;
FIG. 2A is a cross-sectional view of the patient's tibia with the keel recess forming kit illustrated in FIG. 1;
FIG. 2B is a front elevation view of the tool guide illustrated in FIG. 1, with the tool guide spaced away from the resected tibia portion;
FIG. 2C is a photograph showing a perspective view of a resected portion of a patient's tibia including a keel-receiving recess formed using the keel recess forming kit illustrated in FIG. 1;
FIG. 3 is a perspective view of the keel recess forming tool illustrated in FIG. 1;
FIG. 4 is a top perspective view of a tool guide for the keel recess forming kit illustrated in FIG. 1;
FIG. 5 is another top perspective view of the tool guide illustrated in FIG.
1; and FIG. 6 is a bottom perspective view of the tool guide illustrated in FIG. 1.
DETAILED DESCRIPTION
Date Recue/Date Received 2021-01-28
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a proximal portion of a patient's tibia and a keel recess forming kit including a keel recess forming tool and a tool guide, in accordance with one embodiment, with the tool guide positioning in a resected tibia portion of the patient's tibia and the keel recess forming tool engaging a guiding channel of the tool guide;
FIG. 2A is a cross-sectional view of the patient's tibia with the keel recess forming kit illustrated in FIG. 1;
FIG. 2B is a front elevation view of the tool guide illustrated in FIG. 1, with the tool guide spaced away from the resected tibia portion;
FIG. 2C is a photograph showing a perspective view of a resected portion of a patient's tibia including a keel-receiving recess formed using the keel recess forming kit illustrated in FIG. 1;
FIG. 3 is a perspective view of the keel recess forming tool illustrated in FIG. 1;
FIG. 4 is a top perspective view of a tool guide for the keel recess forming kit illustrated in FIG. 1;
FIG. 5 is another top perspective view of the tool guide illustrated in FIG.
1; and FIG. 6 is a bottom perspective view of the tool guide illustrated in FIG. 1.
DETAILED DESCRIPTION
Date Recue/Date Received 2021-01-28
8 It will be appreciated that, for simplicity and clarity of illustration, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements or steps. In addition, numerous specific details are set forth in order to provide a thorough understanding of the exemplary embodiments described herein. However, it will be understood by those of ordinary skill in the art, that the embodiments described herein may be practiced without these specific details. In other instances, well-known methods, procedures and components have not been described in detail so as not to obscure the embodiments described herein. Furthermore, this description is not to be considered as limiting the scope of the embodiments described herein in any way but rather as merely describing the implementation of the various embodiments described herein.
For the sake of simplicity and clarity, namely so as to not unduly burden the figures with several references numbers, not all figures contain references to all the components and features, and references to some components and features may be found in only one figure, and components and features of the present disclosure which are illustrated in other figures can be easily inferred therefrom. The embodiments, geometrical configurations, materials mentioned and/or dimensions shown in the figures are optional, and are given for exemplification purposes only.
Referring to FIGS. 1 to 2C, there is shown a keel recess forming kit 100, in accordance with one embodiment. The keel recess forming kit 100 is provided for forming a keel-receiving recess (or slot) 60 in a patient's proximal tibia 50 for receiving a keel of a tibial component (implant), not shown. More specifically, the patient's proximal tibia 50 includes a resected tibia portion 51 with a first tibial planar face or tibial plateau 52, spaced-apart from an unresected tibial articular surface 40, and a second tibial planar face or sagittal face 54, extending between the unresected tibial articular surface 40 and the tibial plateau 52. The tibial plateau and the sagittal faces 52, 54 are substantially perpendicular to each other, and the tibial plateau 52 is substantially parallel to a transverse plane of the patient's body while the sagittal face is substantially parallel to a sagittal plane of the patient's Date Recue/Date Received 2021-01-28
For the sake of simplicity and clarity, namely so as to not unduly burden the figures with several references numbers, not all figures contain references to all the components and features, and references to some components and features may be found in only one figure, and components and features of the present disclosure which are illustrated in other figures can be easily inferred therefrom. The embodiments, geometrical configurations, materials mentioned and/or dimensions shown in the figures are optional, and are given for exemplification purposes only.
Referring to FIGS. 1 to 2C, there is shown a keel recess forming kit 100, in accordance with one embodiment. The keel recess forming kit 100 is provided for forming a keel-receiving recess (or slot) 60 in a patient's proximal tibia 50 for receiving a keel of a tibial component (implant), not shown. More specifically, the patient's proximal tibia 50 includes a resected tibia portion 51 with a first tibial planar face or tibial plateau 52, spaced-apart from an unresected tibial articular surface 40, and a second tibial planar face or sagittal face 54, extending between the unresected tibial articular surface 40 and the tibial plateau 52. The tibial plateau and the sagittal faces 52, 54 are substantially perpendicular to each other, and the tibial plateau 52 is substantially parallel to a transverse plane of the patient's body while the sagittal face is substantially parallel to a sagittal plane of the patient's Date Recue/Date Received 2021-01-28
9 body. Alternatively, the first and second tibia planar faces 52, 54 could be angled at a different angle relative to each other and/or relative to the patient's body.
In the illustrated embodiment, the kit 100 includes a keel recess forming tool (or impactor) 200 and a tool guide 300 positionable in the resected tibia portion 51 to guide the keel recess forming tool 200 into the tibial plateau 52 to form the keel-receiving recess in the tibial plateau 52. More particularly, the tool guide 300 is juxtaposable against the tibial plateau and the sagittal faces 52, 54.
Referring to FIGS. 1 to 3, the keel recess forming tool 200 is generally elongated and extends between a bone-engaging end 202 and a handling end 204. The keel recess forming tool 200 includes a bone-engaging end portion 206 extending from the bone-engaging end 202 towards the handling end 204 and a handle end portion 208 extending from the handling end 204 towards the bone-engaging end 202.
In the illustrated embodiment, the bone-engaging end portion 206 includes a pointed tip 209 located at the bone-engaging end 202 such that when the bone-engaging end 202 is placed against the tibia 50 and the handling end 204 is impacted by the user using an appropriate impacting tool such as a mallet, an automated impacting tool or the like, the bone-engaging end portion 206 is driven into the tibia 50. In a non-limitative embodiment, the keel recess forming tool 200 is a bone chisel.
In the illustrated embodiment, the handle end portion 208 has a substantially circular cross-section while the bone-engaging end portion 206 has a substantially rectangular cross-section. Specifically, the bone-engaging end portion 206 includes first and second tool edges 210, 212 extending substantially parallel to each other and a pair of planar lateral faces 214, 216 extending substantially parallel to each other and between the first and second tool edges 210, 212.
The lateral faces 214, 216 are spaced from each other by a distance defining a thickness T of the bone-engaging end portion 206 and the tool edges 210, 212 are spaced from each other by a distance defining a width of the bone-engaging end Date Recue/Date Received 2021-01-28
In the illustrated embodiment, the kit 100 includes a keel recess forming tool (or impactor) 200 and a tool guide 300 positionable in the resected tibia portion 51 to guide the keel recess forming tool 200 into the tibial plateau 52 to form the keel-receiving recess in the tibial plateau 52. More particularly, the tool guide 300 is juxtaposable against the tibial plateau and the sagittal faces 52, 54.
Referring to FIGS. 1 to 3, the keel recess forming tool 200 is generally elongated and extends between a bone-engaging end 202 and a handling end 204. The keel recess forming tool 200 includes a bone-engaging end portion 206 extending from the bone-engaging end 202 towards the handling end 204 and a handle end portion 208 extending from the handling end 204 towards the bone-engaging end 202.
In the illustrated embodiment, the bone-engaging end portion 206 includes a pointed tip 209 located at the bone-engaging end 202 such that when the bone-engaging end 202 is placed against the tibia 50 and the handling end 204 is impacted by the user using an appropriate impacting tool such as a mallet, an automated impacting tool or the like, the bone-engaging end portion 206 is driven into the tibia 50. In a non-limitative embodiment, the keel recess forming tool 200 is a bone chisel.
In the illustrated embodiment, the handle end portion 208 has a substantially circular cross-section while the bone-engaging end portion 206 has a substantially rectangular cross-section. Specifically, the bone-engaging end portion 206 includes first and second tool edges 210, 212 extending substantially parallel to each other and a pair of planar lateral faces 214, 216 extending substantially parallel to each other and between the first and second tool edges 210, 212.
The lateral faces 214, 216 are spaced from each other by a distance defining a thickness T of the bone-engaging end portion 206 and the tool edges 210, 212 are spaced from each other by a distance defining a width of the bone-engaging end Date Recue/Date Received 2021-01-28
10 portion 206. More specifically, the bone-engaging end portion 206 can be divided into a distal segment 218 located towards the bone-engaging end 202 and having a distal segment width Wi, and a proximal segment 220 located towards the handling end 204 which has a proximal segment width W2 greater than the distal segment width M. In this embodiment, the bone-engaging end portion 206 therefore includes a shoulder portion 222 located between the distal and proximal segments 218, 220 of the bone-engaging end portion 206. The shoulder portion 222 defines an abutment 223 which abuts the tool guide 300 to prevent further movement of the keel recess forming tool 200 towards the tibia 50 when the tool 200 engages the tool guide 300, as will be explained further below.
In the illustrated embodiment, the shoulder portion 222 is defined only in the first tool edge 210 while the second tool edge 212 extends substantially linearly between the bone-engaging end 202 and the handle end portion 208.
Alternatively, the shoulder portion 222 could be defined only in the second tool edge 212. In yet another embodiment, the shoulder portion 222 includes a pair of shoulders, each one being defined in one of the first and second tool edges 210, 212. The shoulder portions could be substantially aligned with each other or could be disposed at different locations along the bone-engaging end portion 206, i.e. a first one of the shoulder portions could be spaced-apart along a longitudinal axis of the keel recess forming tool 200 from a second one of the shoulder portions.
In an embodiment (not shown), the first tool edge 210 and/or the second tool edge 212 can be serrated in a portion of the distal segment in a manner such that the keel recess forming tool 200 includes a blade and is used as a reciprocating saw to perform the keel-receiving recess into the proximal tibia 50.
In the illustrated embodiment, the distal and proximal segment widths W1, W2 are both greater than the thickness T of the bone-engaging end portion 206.
Alternatively, the thickness T could be equal to or greater than the distal and/or proximal segment widths W1, W2. Still in the illustrated embodiment, the handle end portion 208 has a diameter which is substantially equal to the proximal Date Recue/Date Received 2021-01-28
In the illustrated embodiment, the shoulder portion 222 is defined only in the first tool edge 210 while the second tool edge 212 extends substantially linearly between the bone-engaging end 202 and the handle end portion 208.
Alternatively, the shoulder portion 222 could be defined only in the second tool edge 212. In yet another embodiment, the shoulder portion 222 includes a pair of shoulders, each one being defined in one of the first and second tool edges 210, 212. The shoulder portions could be substantially aligned with each other or could be disposed at different locations along the bone-engaging end portion 206, i.e. a first one of the shoulder portions could be spaced-apart along a longitudinal axis of the keel recess forming tool 200 from a second one of the shoulder portions.
In an embodiment (not shown), the first tool edge 210 and/or the second tool edge 212 can be serrated in a portion of the distal segment in a manner such that the keel recess forming tool 200 includes a blade and is used as a reciprocating saw to perform the keel-receiving recess into the proximal tibia 50.
In the illustrated embodiment, the distal and proximal segment widths W1, W2 are both greater than the thickness T of the bone-engaging end portion 206.
Alternatively, the thickness T could be equal to or greater than the distal and/or proximal segment widths W1, W2. Still in the illustrated embodiment, the handle end portion 208 has a diameter which is substantially equal to the proximal Date Recue/Date Received 2021-01-28
11 segment width W2. Alternatively, the proximal segment width W2 could be greater or smaller than the diameter of the handle end portion 208.
Referring now to FIGS. 1 to 5, the tool guide 300 includes a guide body 302 having a tool-engaging face 304, a transverse bone-contacting face 306 extending opposite the tool-engaging face 304 and a sagittal bone-contacting face 308 adjacent the transverse bone-contacting face 306 and angled relative to the transverse bone-contacting face 306. In the illustrated embodiment, the tool-engaging face 304 and the transverse bone-contacting face 306 are both substantially planar and extend substantially parallel to each other. Still in the illustrated embodiment, the sagittal bone-contacting face 308 extends between the tool-engaging face 304 and the transverse bone-contacting face 306.
Specifically, the sagittal bone-contacting face 308 is also substantially planar and extends substantially perpendicular to the tool-engaging face 304 and the transverse bone-contacting face 306.
When the tool guide 300 is placed in the resected tibia portion 51, the transverse bone-contacting face 306 can therefore be placed against (or superimposed to) the tibial plateau 52 and the sagittal bone-contacting face 308 can be placed against (or superimposed to) the sagittal face 54 of the resected tibia portion 51 to thereby locate the tool guide 300 at a desired position against the tibia 50.
Still in the illustrated embodiment, the guide body 302 further includes a contoured lateral face 312 located opposite the sagittal bone-contacting face 308 and extending between the tool-engaging face 304 and the transverse bone-contacting face 306. As best shown in FIG. 1, the contoured lateral face 312 is not planar, but is instead shaped to follow an outer contour edge 53 of the tibial plateau 52.
In other words, in the illustrated embodiment, the transverse bone-contacting face 306 has a size and shape corresponding to a size and shape of the tibial plateau 52. This may assist a user to position the tool guide 300 at the desired position on the tibial plateau 52. Specifically, an alignment of the contoured lateral face 312 with the outer contour edge 53 of the tibial plateau 52, i.e. when the contoured lateral face 312 is in register with the outer contour edge 53 of the tibial plateau Date Recue/Date Received 2021-01-28
Referring now to FIGS. 1 to 5, the tool guide 300 includes a guide body 302 having a tool-engaging face 304, a transverse bone-contacting face 306 extending opposite the tool-engaging face 304 and a sagittal bone-contacting face 308 adjacent the transverse bone-contacting face 306 and angled relative to the transverse bone-contacting face 306. In the illustrated embodiment, the tool-engaging face 304 and the transverse bone-contacting face 306 are both substantially planar and extend substantially parallel to each other. Still in the illustrated embodiment, the sagittal bone-contacting face 308 extends between the tool-engaging face 304 and the transverse bone-contacting face 306.
Specifically, the sagittal bone-contacting face 308 is also substantially planar and extends substantially perpendicular to the tool-engaging face 304 and the transverse bone-contacting face 306.
When the tool guide 300 is placed in the resected tibia portion 51, the transverse bone-contacting face 306 can therefore be placed against (or superimposed to) the tibial plateau 52 and the sagittal bone-contacting face 308 can be placed against (or superimposed to) the sagittal face 54 of the resected tibia portion 51 to thereby locate the tool guide 300 at a desired position against the tibia 50.
Still in the illustrated embodiment, the guide body 302 further includes a contoured lateral face 312 located opposite the sagittal bone-contacting face 308 and extending between the tool-engaging face 304 and the transverse bone-contacting face 306. As best shown in FIG. 1, the contoured lateral face 312 is not planar, but is instead shaped to follow an outer contour edge 53 of the tibial plateau 52.
In other words, in the illustrated embodiment, the transverse bone-contacting face 306 has a size and shape corresponding to a size and shape of the tibial plateau 52. This may assist a user to position the tool guide 300 at the desired position on the tibial plateau 52. Specifically, an alignment of the contoured lateral face 312 with the outer contour edge 53 of the tibial plateau 52, i.e. when the contoured lateral face 312 is in register with the outer contour edge 53 of the tibial plateau Date Recue/Date Received 2021-01-28
12 52, would provide to the user an indication that the tool guide 300 is positioned in its desired position.
In one embodiment, the tool guide 300 may be patient specific. Specifically, prior to the knee arthroplasty procedure, which can be a partial knee arthroplasty procedure, the patient's tibia 50 could be scanned and a 3D model of the tibia or of a portion of the tibia 50 could then be created in a virtual environment. The resection of the tibia 50 to form the resected tibia portion 51 could then be virtually performed on the 3D model of the tibia 50. The outer contour edge 53 of the tibial plateau 52 could then be determined and the guide body 302 could then be designed in accordance with the outer contour edge 53 of the tibial plateau 52. The tool guide 300 could then be manufactured using suitable manufacturing techniques such as 3D printing, CNC machining or the like.
Alternatively, the tool guide 300 may not be patient specific and the contoured lateral face 312 may not follow the outer contour edge 53 of the tibial plateau 52.
The tool guide 300 may not even comprise a contoured lateral face and could instead include a planar or curved face extending opposite the sagittal bone-contacting face 308.
In the illustrated embodiment, the tool guide 300 further includes a guiding channel 320 which is sized and shaped to slidably receive the bone-engaging end portion 206 of the keel recess forming tool 200, and more specifically the distal segment 218 of the bone-engaging end portion 206. The guiding channel 320 extends through the guide body 302 between the tool-engaging face 304 and the transverse bone-contacting face 306. Specifically, the guiding channel 320 has a rectangular cross-section having a channel thickness substantially corresponding to the thickness T of the bone-engaging end portion 206 and a channel width corresponding to the distal segment width Wi of the distal segment 218 of the bone-engaging end portion 206.
The guiding channel 320 extends along a central channel axis C and the bone-engaging end portion 206 of the keel recess forming tool 200 is slidable within the Date Recue/Date Received 2021-01-28
In one embodiment, the tool guide 300 may be patient specific. Specifically, prior to the knee arthroplasty procedure, which can be a partial knee arthroplasty procedure, the patient's tibia 50 could be scanned and a 3D model of the tibia or of a portion of the tibia 50 could then be created in a virtual environment. The resection of the tibia 50 to form the resected tibia portion 51 could then be virtually performed on the 3D model of the tibia 50. The outer contour edge 53 of the tibial plateau 52 could then be determined and the guide body 302 could then be designed in accordance with the outer contour edge 53 of the tibial plateau 52. The tool guide 300 could then be manufactured using suitable manufacturing techniques such as 3D printing, CNC machining or the like.
Alternatively, the tool guide 300 may not be patient specific and the contoured lateral face 312 may not follow the outer contour edge 53 of the tibial plateau 52.
The tool guide 300 may not even comprise a contoured lateral face and could instead include a planar or curved face extending opposite the sagittal bone-contacting face 308.
In the illustrated embodiment, the tool guide 300 further includes a guiding channel 320 which is sized and shaped to slidably receive the bone-engaging end portion 206 of the keel recess forming tool 200, and more specifically the distal segment 218 of the bone-engaging end portion 206. The guiding channel 320 extends through the guide body 302 between the tool-engaging face 304 and the transverse bone-contacting face 306. Specifically, the guiding channel 320 has a rectangular cross-section having a channel thickness substantially corresponding to the thickness T of the bone-engaging end portion 206 and a channel width corresponding to the distal segment width Wi of the distal segment 218 of the bone-engaging end portion 206.
The guiding channel 320 extends along a central channel axis C and the bone-engaging end portion 206 of the keel recess forming tool 200 is slidable within the Date Recue/Date Received 2021-01-28
13 guiding channel 320 and along the central channel axis C. In this configuration, the keel-receiving recess 60 therefore also extends along the central channel axis C, as shown in FIG. 2A
In the illustrated embodiment, the guiding channel 320 is positioned such that the channel axis C is angled at an acute angle, i.e. an angle between 0 and 90 degrees, relative to the transverse bone-contacting face 306, as further shown in FIG. 2A. For example, the channel axis C may be angled at an angle of between 0 and 45 degrees, or more specifically of between 20 and 40 degrees.
In the illustrated embodiment, the guiding channel 320 is further positioned such that the channel axis C is substantially parallel to the sagittal bone-contacting face 308, as best shown in FIG. 2B. Alternatively, the channel axis C could be angled relative to the sagittal bone-contacting face 308.
In the illustrated embodiment, the guiding channel 320 is located adjacent the sagittal bone-contacting face 308 to form the keel recess 60 adjacent the sagittal face 54 of the resected tibia portion 51, as shown in FIG. 2C. More specifically, the guiding channel 320 has an open lateral side 322 which is defined in the sagittal bone-contacting face 308. When the tool guide 300 is not placed in the resected tibial portion 51, the bone-engaging end portion 206 of the keel recess forming tool 200 is therefore insertable laterally in the guiding channel 320. However, when the tool guide 300 is positioned in the resected tibial portion 51 such that the sagittal bone-contacting face 308 abuts the sagittal face 54 of the resected tibial portion 51, the open lateral side 322 of the guiding channel 320 is closed off by the sagittal face 54 such that removal of the bone-engaging end portion 306 laterally from the guiding channel 320 is prevented. When the bone-engaging end portion 306 slides within the guiding channel 320 along the channel axis C, the bone-engaging end portion 306 therefore substantially slides along the sagittal face 54 of the resected tibial portion 51. Alternatively, the guiding channel 320 may not include an open lateral side and may instead be closed on all sides. In this embodiment, the keel recess 60 would therefore be slightly spaced away from the sagittal face 54 of the resected tibial portion 51.
Date Recue/Date Received 2021-01-28
In the illustrated embodiment, the guiding channel 320 is positioned such that the channel axis C is angled at an acute angle, i.e. an angle between 0 and 90 degrees, relative to the transverse bone-contacting face 306, as further shown in FIG. 2A. For example, the channel axis C may be angled at an angle of between 0 and 45 degrees, or more specifically of between 20 and 40 degrees.
In the illustrated embodiment, the guiding channel 320 is further positioned such that the channel axis C is substantially parallel to the sagittal bone-contacting face 308, as best shown in FIG. 2B. Alternatively, the channel axis C could be angled relative to the sagittal bone-contacting face 308.
In the illustrated embodiment, the guiding channel 320 is located adjacent the sagittal bone-contacting face 308 to form the keel recess 60 adjacent the sagittal face 54 of the resected tibia portion 51, as shown in FIG. 2C. More specifically, the guiding channel 320 has an open lateral side 322 which is defined in the sagittal bone-contacting face 308. When the tool guide 300 is not placed in the resected tibial portion 51, the bone-engaging end portion 206 of the keel recess forming tool 200 is therefore insertable laterally in the guiding channel 320. However, when the tool guide 300 is positioned in the resected tibial portion 51 such that the sagittal bone-contacting face 308 abuts the sagittal face 54 of the resected tibial portion 51, the open lateral side 322 of the guiding channel 320 is closed off by the sagittal face 54 such that removal of the bone-engaging end portion 306 laterally from the guiding channel 320 is prevented. When the bone-engaging end portion 306 slides within the guiding channel 320 along the channel axis C, the bone-engaging end portion 306 therefore substantially slides along the sagittal face 54 of the resected tibial portion 51. Alternatively, the guiding channel 320 may not include an open lateral side and may instead be closed on all sides. In this embodiment, the keel recess 60 would therefore be slightly spaced away from the sagittal face 54 of the resected tibial portion 51.
Date Recue/Date Received 2021-01-28
14 In the illustrated embodiment, the guide body 302 further includes a tool stopping abutment 330 for abutting the abutment 223 of the keel recess forming tool 200.
Specifically, the tool stopping abutment 330 includes a wedge-shaped stopping projection 332 extending away from the tool-engaging face 304 and along the channel axis C. The wedge-shaped projection 332 includes a distal abutting surface 334 located away from the tool-engaging face 304 and abuttable against the shoulder portion of the keel recess forming tool 200. In the illustrated embodiment, the distal abutting surface 334 is substantially perpendicular to the conduit axis C but alternatively, the distal abutting surface 334 could be configured according to any other suitable configuration.
In another embodiment, the guide body 302 may not include a wedge-shaped projection 332 and the abutment 223 of the keel recess forming tool 200 could instead be abuttable against the tool-engaging face 304 of the guide body 302 such that the tool-engaging face 304 defines the tool stopping abutment 330.
In the illustrated embodiment, the tool guide 300 further includes a pair of drill guiding bores 340 extending through the guide body 302 between the tool-engaging face 304 and the transverse bone-contacting face 306. Each drill guiding bore 340 is sized and shaped to guide a drill bit for drilling a peg receiving hole 70, shown in FIG. 2C, in the tibial plateau 52 for receiving a corresponding peg of the tibial component. In the illustrated embodiment, each drill guiding bores 340 extend along a drill axis D which is angled at an angle which is acute relative to the transverse bone-contacting face 306, but which is different from the angle between the conduit axis C and the transverse bone-contacting face 306. Alternatively, the drill axis D could be substantially parallel to the conduit axis C. In another embodiment, the drill guiding bores 340 could be positioned such that the angle between the drill axis D and the transverse bone-contacting face 306 is an obtuse angle or a substantially right angle. In yet another embodiment, the drill guiding bores 340 could be positioned such that their drill axes D are oriented at different angles from each other.
Date Recue/Date Received 2021-01-28
Specifically, the tool stopping abutment 330 includes a wedge-shaped stopping projection 332 extending away from the tool-engaging face 304 and along the channel axis C. The wedge-shaped projection 332 includes a distal abutting surface 334 located away from the tool-engaging face 304 and abuttable against the shoulder portion of the keel recess forming tool 200. In the illustrated embodiment, the distal abutting surface 334 is substantially perpendicular to the conduit axis C but alternatively, the distal abutting surface 334 could be configured according to any other suitable configuration.
In another embodiment, the guide body 302 may not include a wedge-shaped projection 332 and the abutment 223 of the keel recess forming tool 200 could instead be abuttable against the tool-engaging face 304 of the guide body 302 such that the tool-engaging face 304 defines the tool stopping abutment 330.
In the illustrated embodiment, the tool guide 300 further includes a pair of drill guiding bores 340 extending through the guide body 302 between the tool-engaging face 304 and the transverse bone-contacting face 306. Each drill guiding bore 340 is sized and shaped to guide a drill bit for drilling a peg receiving hole 70, shown in FIG. 2C, in the tibial plateau 52 for receiving a corresponding peg of the tibial component. In the illustrated embodiment, each drill guiding bores 340 extend along a drill axis D which is angled at an angle which is acute relative to the transverse bone-contacting face 306, but which is different from the angle between the conduit axis C and the transverse bone-contacting face 306. Alternatively, the drill axis D could be substantially parallel to the conduit axis C. In another embodiment, the drill guiding bores 340 could be positioned such that the angle between the drill axis D and the transverse bone-contacting face 306 is an obtuse angle or a substantially right angle. In yet another embodiment, the drill guiding bores 340 could be positioned such that their drill axes D are oriented at different angles from each other.
Date Recue/Date Received 2021-01-28
15 In the illustrated embodiment, the tool guide 300 further includes a pair of drill receiving barrels 342 extending upwardly from the tool-engaging face 304. Each drill receiving barrel 342 surrounds and partially delimits a corresponding drill guiding bore 340 and includes a distal barrel rim 344 located away from the tool-engaging face 304. The distal barrel rim 344 may be abuttable against a corresponding stop member of a drill or drill bit engaging the drill receiving barrel to prevent further movement of the drill or drill bit towards the tibia 50.
Alternatively, the tool guide 300 may not include any drill receiving barrel.
It will further be understood that although a pair of drill guiding bores 340 are illustrated and described above, the tool guide 300 could instead include a single drill guiding bore, more than two drill guiding bores or no drill guiding bores, depending on the number of pegs on the tibial component.
In the illustrated embodiment, the tool guide 300 further includes a fastener bore 350 extending through the guide body 302 between the tool-engaging face 304 and the transverse bone-contacting face 306. The fastener bore 350 is sized and shaped to receive a fastener, not shown, to removably secure the tool guide to the tibia 50. Once the tool guide 300 has been positioned at the desired location within the resected tibia portion 51, the fastener could be inserted into the fastener bore 350 and screwed or driven into the tibial plateau 52 to prevent movement of the tool guide 300 relative to the tibia 50 while the keel recess 60 and/or the peg receiving holes 70 are being formed. Once the keel recess 60 and/or the peg receiving holes 70 have been formed, the fastener could be removed to allow the tool guide to be removed from the resected tibia portion 51.
In the illustrated embodiment, the tool guide 300 further includes a counterbore 352 defined in the tool-engaging face 304 and around the fastener bore 350 to receive a head of the fastener. Alternatively, the tool guide 300 may not include a counterbore.
Date Recue/Date Received 2021-01-28
Alternatively, the tool guide 300 may not include any drill receiving barrel.
It will further be understood that although a pair of drill guiding bores 340 are illustrated and described above, the tool guide 300 could instead include a single drill guiding bore, more than two drill guiding bores or no drill guiding bores, depending on the number of pegs on the tibial component.
In the illustrated embodiment, the tool guide 300 further includes a fastener bore 350 extending through the guide body 302 between the tool-engaging face 304 and the transverse bone-contacting face 306. The fastener bore 350 is sized and shaped to receive a fastener, not shown, to removably secure the tool guide to the tibia 50. Once the tool guide 300 has been positioned at the desired location within the resected tibia portion 51, the fastener could be inserted into the fastener bore 350 and screwed or driven into the tibial plateau 52 to prevent movement of the tool guide 300 relative to the tibia 50 while the keel recess 60 and/or the peg receiving holes 70 are being formed. Once the keel recess 60 and/or the peg receiving holes 70 have been formed, the fastener could be removed to allow the tool guide to be removed from the resected tibia portion 51.
In the illustrated embodiment, the tool guide 300 further includes a counterbore 352 defined in the tool-engaging face 304 and around the fastener bore 350 to receive a head of the fastener. Alternatively, the tool guide 300 may not include a counterbore.
Date Recue/Date Received 2021-01-28
16 It will further be understood that although a single fastener bore 350 is illustrated and described above, the tool guide 300 could instead include more than one fastener bore 350 or no fastener bores.
Still in the illustrated embodiment, the tool guide 300 further includes a handle 360 extending away from the guide body 302 for handling and positioning the tool guide 300 in the resected tibia portion 51. More specifically, the handle 360 is elongated and extends from the contoured lateral face 312 along a handle axis H which is substantially parallel to both the transverse and sagittal bone-contacting faces 306, 308. Alternatively, the handle 360 could be positioned such that the handle axis H
is oriented in another suitable orientation. In another embodiment, the handle may not be elongated and/or may not extend from the contoured lateral face 312 but could instead extend from the tool-engaging face 304 or any other suitable location on the guide body 302.
In the illustrated embodiment, the handle 360 is permanently secured to the guide body 302, but alternatively, the handle 360 could be removably secured to the guide body 302. In this embodiment, once the tool guide 300 has been positioned at the desired position in the resected tibia portion 51 and the tool guide 300 has been removably secured to the tibia 50 using the fastener, the handle 360 could be removed from the guide body 302.
In one embodiment, the tool guide 300 is manufactured as a monobloc component using an appropriate fabrication technique such a 3D printing, CNC machining or the like. Alternatively, the tool guide 300 may be made from a plurality of components assembled and secured together.
To form the keel recess 60 in the patient's tibia 50, the tibia 50 is first resected to form the resected tibia portion 51 including the tibial plateau 52 and the sagittal face 54.
The tool guide 300 may then be positioned in the resected tibia portion 51 such that the transverse bone-contacting face 306 abuts the tibial plateau 52, such that the sagittal bone-contacting face 308 abuts the sagittal face 54 and such that the Date Recue/Date Received 2021-01-28
Still in the illustrated embodiment, the tool guide 300 further includes a handle 360 extending away from the guide body 302 for handling and positioning the tool guide 300 in the resected tibia portion 51. More specifically, the handle 360 is elongated and extends from the contoured lateral face 312 along a handle axis H which is substantially parallel to both the transverse and sagittal bone-contacting faces 306, 308. Alternatively, the handle 360 could be positioned such that the handle axis H
is oriented in another suitable orientation. In another embodiment, the handle may not be elongated and/or may not extend from the contoured lateral face 312 but could instead extend from the tool-engaging face 304 or any other suitable location on the guide body 302.
In the illustrated embodiment, the handle 360 is permanently secured to the guide body 302, but alternatively, the handle 360 could be removably secured to the guide body 302. In this embodiment, once the tool guide 300 has been positioned at the desired position in the resected tibia portion 51 and the tool guide 300 has been removably secured to the tibia 50 using the fastener, the handle 360 could be removed from the guide body 302.
In one embodiment, the tool guide 300 is manufactured as a monobloc component using an appropriate fabrication technique such a 3D printing, CNC machining or the like. Alternatively, the tool guide 300 may be made from a plurality of components assembled and secured together.
To form the keel recess 60 in the patient's tibia 50, the tibia 50 is first resected to form the resected tibia portion 51 including the tibial plateau 52 and the sagittal face 54.
The tool guide 300 may then be positioned in the resected tibia portion 51 such that the transverse bone-contacting face 306 abuts the tibial plateau 52, such that the sagittal bone-contacting face 308 abuts the sagittal face 54 and such that the Date Recue/Date Received 2021-01-28
17 contoured lateral face is aligned with the outer contour edge 53 of the tibial plateau 50.
In one embodiment, the bone-engaging end portion 206 of the keel recess forming tool 200 can be inserted into the guiding channel 320 prior to positioning the tool guide 300 in the resected tibia portion 51, and more specifically can be inserted into the guiding channel 320 through the open lateral side of the guiding channel 320.
In another embodiment, the bone-engaging end portion 206 of the keel recess forming tool 200 may be inserted into the guiding channel 320 once the tool guide 300 has been positioned in the resected tibia portion 51.
In one embodiment, prior to inserting the bone-engaging end portion 206 of the keel recess forming tool 200 into the guiding channel 320, the tool guide 300 could be removably secured to the tibia 50 using the fastener.
The bone-engaging end portion 206 of the keel recess forming tool 200 can then be moved towards the tibial plateau 52 to form the keel recess 60.
Specifically, once the bone-engaging end portion 206 has been moved into the guiding channel 320 such that the bone-engaging end 202 contacts the tibial plateau 52, the handling end 204 could be impacted using an appropriate impacting tool such as a mallet, an automated impacting tool or the like to drive the bone-engaging end portion 206 into the tibia 50.
The peg receiving holes 70 can also be formed by inserting the drill or drill bit into the drill guiding bores 340 and moving the drill or drill bit towards the tibial plateau 52. The peg receiving holes 70 could be formed before or after the keel recess is formed.
The tool guide 300 can then be removed from the resected tibia portion 51 and the tibial component can then be installed in the resected tibia portion 51. In an embodiment in which the tool guide 300 was fastened to the tibia using the Date Recue/Date Received 2021-01-28
In one embodiment, the bone-engaging end portion 206 of the keel recess forming tool 200 can be inserted into the guiding channel 320 prior to positioning the tool guide 300 in the resected tibia portion 51, and more specifically can be inserted into the guiding channel 320 through the open lateral side of the guiding channel 320.
In another embodiment, the bone-engaging end portion 206 of the keel recess forming tool 200 may be inserted into the guiding channel 320 once the tool guide 300 has been positioned in the resected tibia portion 51.
In one embodiment, prior to inserting the bone-engaging end portion 206 of the keel recess forming tool 200 into the guiding channel 320, the tool guide 300 could be removably secured to the tibia 50 using the fastener.
The bone-engaging end portion 206 of the keel recess forming tool 200 can then be moved towards the tibial plateau 52 to form the keel recess 60.
Specifically, once the bone-engaging end portion 206 has been moved into the guiding channel 320 such that the bone-engaging end 202 contacts the tibial plateau 52, the handling end 204 could be impacted using an appropriate impacting tool such as a mallet, an automated impacting tool or the like to drive the bone-engaging end portion 206 into the tibia 50.
The peg receiving holes 70 can also be formed by inserting the drill or drill bit into the drill guiding bores 340 and moving the drill or drill bit towards the tibial plateau 52. The peg receiving holes 70 could be formed before or after the keel recess is formed.
The tool guide 300 can then be removed from the resected tibia portion 51 and the tibial component can then be installed in the resected tibia portion 51. In an embodiment in which the tool guide 300 was fastened to the tibia using the Date Recue/Date Received 2021-01-28
18 fastener, removing the tool guide 300 from the resected tibia portion 51 includes first removing the fastener to unsecure the tool guide 300 from the tibia 50.
While the above description provides examples of the embodiments, it will be appreciated that some features and/or functions of the described embodiments are susceptible to modification without departing from the spirit and principles of operation of the described embodiments. Accordingly, what has been described above has been intended to be illustrative and non-limiting and it will be understood by persons skilled in the art that other variants and modifications may be made without departing from the scope of the invention as defined in the claims appended hereto.
Date Recue/Date Received 2021-01-28
While the above description provides examples of the embodiments, it will be appreciated that some features and/or functions of the described embodiments are susceptible to modification without departing from the spirit and principles of operation of the described embodiments. Accordingly, what has been described above has been intended to be illustrative and non-limiting and it will be understood by persons skilled in the art that other variants and modifications may be made without departing from the scope of the invention as defined in the claims appended hereto.
Date Recue/Date Received 2021-01-28
Claims (20)
1. A keel recess forming kit for forming a keel-receiving recess in a resected tibia portion of a patient's tibia during a knee arthroplasty procedure, the keel-receiving recess being sized and shaped for receiving a keel of a tibial component, the resected tibia portion having a first tibia planar face and a second tibia planar face extending at an angle relative to the first tibia planar face, the kit comprising:
a keel recess forming tool having a bone-engaging end portion; and a tool guide for guiding the keel recess forming tool into the tibia, the tool guide including:
a guide body having a tool-engaging face, a first planar bone-contacting face opposite the tool-engaging face and a second planar bone-contacting face adjacent to the first planar bone contacting face and angled relative thereto, the first and second planar bone-contacting faces being abuttable respectively against the first and second tibia planar faces to position the body at a desired position in the resected tibia portion, the guide body further comprising a guiding channel extending therethrough between the tool-engaging face and the first planar bone-contacting face and along a channel axis, the guiding channel being opened on the second planar bone-contacting face, the guiding channel being sized and shaped for slidably receiving the bone-engaging end portion of the keel recess forming tool to guide the bone-engaging end portion along the channel axis when the bone-engaging end portion is received in the guiding channel and is moved towards the tibia.
a keel recess forming tool having a bone-engaging end portion; and a tool guide for guiding the keel recess forming tool into the tibia, the tool guide including:
a guide body having a tool-engaging face, a first planar bone-contacting face opposite the tool-engaging face and a second planar bone-contacting face adjacent to the first planar bone contacting face and angled relative thereto, the first and second planar bone-contacting faces being abuttable respectively against the first and second tibia planar faces to position the body at a desired position in the resected tibia portion, the guide body further comprising a guiding channel extending therethrough between the tool-engaging face and the first planar bone-contacting face and along a channel axis, the guiding channel being opened on the second planar bone-contacting face, the guiding channel being sized and shaped for slidably receiving the bone-engaging end portion of the keel recess forming tool to guide the bone-engaging end portion along the channel axis when the bone-engaging end portion is received in the guiding channel and is moved towards the tibia.
2. The kit as claimed in claim 1, wherein the guiding channel is oriented such that the channel axis extends substantially parallel to the second planar bone-contacting face.
Date Recue/Date Received 2021-01-28
Date Recue/Date Received 2021-01-28
3. The kit as claimed in claim 1, wherein the keel recess forming tool further includes a tool handle end portion extending away from the bone-engaging end portion and an abutment located between the tool end portion and the bone-engaging end portion, the abutment being abuttable with the tool guide to prevent further movement of the bone-engaging end portion towards the tibia when the bone-engaging end portion is received in the guiding channel.
4. The kit as claimed in claim 3, wherein the tool guide further includes a stopping projection extending away from the tool-engaging face of the guide body and along the channel axis, the stopping projection having a distal sleeve end located away from the tool-engaging face, the distal sleeve end being abuttable with the abutment of the keel recess forming tool.
5. The kit as claimed in claim 3, wherein the bone-engaging end portion has a first cross-sectional dimension and the handle end portion has a second cross-sectional dimension greater than the first cross-section dimension to form a shoulder between the bone-engaging and handle end portions, the shoulder defining the abutment.
6. The kit as claimed in claim 1, wherein the guide body includes at least one fastener bore extending between the tool-engaging face and the first planar bone-contacting face, each fastener bore being sized and shaped for receiving a fastener to removably secure the tool guide to the tibia.
7. The kit as claimed in claim 1, wherein the guide body includes at least one drill guiding bore extending between the tool-engaging face and the first planar bone-contacting face, each drill guiding bore being sized and shaped to guide a drill bit for drilling a peg receiving hole in the tibia for receiving a corresponding peg of the tibial component.
8. The kit as claimed in claim 1, wherein the tool guide further includes a handle extending away from the body for handling the guiding apparatus.
Date Recue/Date Received 2021-01-28
Date Recue/Date Received 2021-01-28
9. The kit as claimed in claim 1, wherein the handle is elongated and extends along a handle axis parallel to both the first and second planar bone-contacting faces.
10. The kit as claimed in claim 1, wherein the guiding channel is oriented such that the channel axis is angled at an acute angle relative to the planar bone-contacting face.
11. A tool guide for guiding a keel recess forming tool into a patient's tibia during a knee arthroplasty procedure, the tibia including a resected tibia portion having a first tibia planar face and a second tibia planar face extending at an angle relative to the first tibia planar face, the tool guide comprising:
a guide body having a tool-engaging face, a first planar bone-contacting face opposite the tool-engaging face and a second planar bone-contacting face adjacent to the first planar bone contacting face and angled relative thereto, the first and second planar bone-contacting faces being abuttable respectively against the first and second tibia planar faces to position the body at a desired position in the resected tibia portion; the guide body further comprising a guiding channel extending therethrough between the tool-engaging face and the first planar bone-contacting face and along a channel axis, the guiding channel being opened on the second planar bone-contacting face, the guiding channel being sized and shaped for slidably receiving a bone-engaging end portion of the keel recess forming tool to guide the bone-engaging end portion along the channel axis when the bone-engaging end portion is received in the guiding channel and is moved towards the tibia.
a guide body having a tool-engaging face, a first planar bone-contacting face opposite the tool-engaging face and a second planar bone-contacting face adjacent to the first planar bone contacting face and angled relative thereto, the first and second planar bone-contacting faces being abuttable respectively against the first and second tibia planar faces to position the body at a desired position in the resected tibia portion; the guide body further comprising a guiding channel extending therethrough between the tool-engaging face and the first planar bone-contacting face and along a channel axis, the guiding channel being opened on the second planar bone-contacting face, the guiding channel being sized and shaped for slidably receiving a bone-engaging end portion of the keel recess forming tool to guide the bone-engaging end portion along the channel axis when the bone-engaging end portion is received in the guiding channel and is moved towards the tibia.
12. The tool guide as claimed in claim 11, wherein the guiding channel is oriented such that the channel axis is substantially parallel to the second planar bone-contacting face.
13. The tool guide as claimed in claim 11, wherein the tool guide further includes a tool receiving sleeve extending away from the tool-engaging face of the guide body and along the channel axis, the tool receiving sleeve having a proximal Date Recue/Date Received 2021-01-28 sleeve end adjacent the tool-engaging face and a distal sleeve end located away from the tool-engaging face, the distal sleeve end being abuttable with an abutment of the keel recess forming tool to prevent further movement of the bone-engaging end portion of the keel recess forming tool towards the tibia when the bone-engaging end portion is received in the guiding channel.
14. The tool guide as claimed in claim 11, wherein the guide body includes at least one fastener bore extending between the tool-engaging face and the first planar bone-contacting face, each fastener bore being sized and shaped for receiving a fastener to removably secure the tool guide to the tibia.
15. The tool guide as claimed in claim 11, wherein the guide body includes at least one drill guiding bore extending between the tool-engaging face and the first planar bone-contacting face, each drill guiding bore being sized and shaped to guide a drill bit for drilling a peg receiving hole in the tibia for receiving a corresponding peg of the tibial component.
16. The tool guide as claimed in claim 11, wherein the tool guide further includes a handle extending away from the body for handling the guiding apparatus.
17. The tool guide as claimed in claim 11, wherein the handle is elongated and extends along a handle axis parallel to both the first and second planar bone-contacting faces.
18. The tool guide as claimed in claim 11, wherein the guiding channel is oriented such that the channel axis is angled at an acute angle relative to the planar bone-contacting face.
19. A surgical kit for performing a knee arthroplasty procedure on a patient's tibia, the tibia including a resected tibia portion having a first tibia planar face and a second tibia planar face extending at an angle relative to the first tibia planar face, the kit comprising:
Date Recue/Date Received 2021-01-28 a tibial component having a bone-engaging face for engaging the first tibia planar face and a keel extending away from the bone-engaging face;
a keel recess forming tool having a bone-engaging end portion;
a tool guide for guiding the keel recess forming tool into the tibia, the tool guide including:
a guide body having a tool-engaging face, a first planar bone-contacting face opposite the tool-engaging face and a second planar bone-contacting face adjacent to the first planar bone contacting face and angled relative thereto, the first and second planar bone-contacting faces being io abuttable respectively against the first and second tibia planar faces to position the body at a desired position in the resected tibia portion, the guide body further comprising a guiding channel extending therethrough between the tool-engaging face and the first planar bone-contacting face and along a channel axis, the guiding channel being opened on the second planar bone-contacting face, the guiding channel being sized and shaped for slidably receiving the bone-engaging end portion of the keel recess forming tool to guide the bone-engaging end portion along the channel axis when the bone-engaging end portion is received in the guiding channel and is moved towards the tibia.
Date Recue/Date Received 2021-01-28 a tibial component having a bone-engaging face for engaging the first tibia planar face and a keel extending away from the bone-engaging face;
a keel recess forming tool having a bone-engaging end portion;
a tool guide for guiding the keel recess forming tool into the tibia, the tool guide including:
a guide body having a tool-engaging face, a first planar bone-contacting face opposite the tool-engaging face and a second planar bone-contacting face adjacent to the first planar bone contacting face and angled relative thereto, the first and second planar bone-contacting faces being io abuttable respectively against the first and second tibia planar faces to position the body at a desired position in the resected tibia portion, the guide body further comprising a guiding channel extending therethrough between the tool-engaging face and the first planar bone-contacting face and along a channel axis, the guiding channel being opened on the second planar bone-contacting face, the guiding channel being sized and shaped for slidably receiving the bone-engaging end portion of the keel recess forming tool to guide the bone-engaging end portion along the channel axis when the bone-engaging end portion is received in the guiding channel and is moved towards the tibia.
20. A method for forming a keel-receiving recess in a patient's tibia during a knee arthroplasty procedure, the tibia including a resected tibia portion having a first tibia planar face and a second tibia planar face extending at an angle relative to the first tibia planar face, the method comprising:
positioning a tool guide within the resected portion of the tibia such that a first planar bone-contacting face of the tool guide abuts the first tibia planar face and a second planar bone-contacting face of the tool guide abuts the second tibia planar face;
Date Recue/Date Received 2021-01-28 inserting a bone-engaging end portion of a keel recess forming tool in a guiding channel of the tool guide, the guiding channel extending between the first planar bone-contacting face and a tool-engaging face opposite the first planar bone-contacting face and along a channel axis, the bone-engaging end portion of a keel recess forming tool having opposed lateral faces with a first one of the lateral faces contacting the tool guide and a second one of the lateral faces contacting the second tibia planar face of the tibia;
slidably moving the keel recess forming tool along the channel axis and towards the tibia until the keel recess forming tool is inserted into the tibia at a io desired depth to thereby form the keel-receiving recess in the tibia.
Date Recue/Date Received 2021-01-28
positioning a tool guide within the resected portion of the tibia such that a first planar bone-contacting face of the tool guide abuts the first tibia planar face and a second planar bone-contacting face of the tool guide abuts the second tibia planar face;
Date Recue/Date Received 2021-01-28 inserting a bone-engaging end portion of a keel recess forming tool in a guiding channel of the tool guide, the guiding channel extending between the first planar bone-contacting face and a tool-engaging face opposite the first planar bone-contacting face and along a channel axis, the bone-engaging end portion of a keel recess forming tool having opposed lateral faces with a first one of the lateral faces contacting the tool guide and a second one of the lateral faces contacting the second tibia planar face of the tibia;
slidably moving the keel recess forming tool along the channel axis and towards the tibia until the keel recess forming tool is inserted into the tibia at a io desired depth to thereby form the keel-receiving recess in the tibia.
Date Recue/Date Received 2021-01-28
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US202063024211P | 2020-05-13 | 2020-05-13 | |
| US63/024.211 | 2020-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3107331A1 true CA3107331A1 (en) | 2021-04-12 |
Family
ID=76206845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3107331A Pending CA3107331A1 (en) | 2020-05-13 | 2021-01-28 | Kits and method for forming a keel-receiving recess in a patient's proximal tibia during a knee arthroplasty procedure |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA3107331A1 (en) |
-
2021
- 2021-01-28 CA CA3107331A patent/CA3107331A1/en active Pending
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