JPWO2021158484A5

JPWO2021158484A5 -

Info

Publication number: JPWO2021158484A5
Application number: JP2022547838A
Authority: JP
Publication date: 2023-12-06

Claims

A femoral preparation guide for use on a femoral condyle to receive a femoral condyle implant during a surgical procedure, the guide comprising:
a posterior portion for fitting over the posterior region of the condyle, the posterior portion including a lower skid and a template bore that defines a generally cylindrical opening within a second resection slot; a posterior portion defined;
a distal portion for fitting over a distal region of the condyle, the distal portion being angled relative to the posterior portion and including a first through bore and a second through bore; The first throughbore is oriented relative to a first surface and a second surface, the first surface being perpendicular to the second surface, and the first surface being perpendicular to the first surface. intersects the second surface on a central axis of the throughbore, the second throughbore is oriented relative to a third surface and a fourth surface, and the third surface is oriented relative to the fourth surface. the third surface intersects the fourth surface on the central axis of the second throughbore, and the third surface and the fourth surface are each perpendicular to the first surface. a distal portion at an oblique angle to the surface and the second surface;
a first resection slot and a second resection slot on the distal portion for receiving a cutting tool for providing two resections of the condyle, the first resection slot being relative to the distal surface; a first resection slot and a second resection slot, the first resection slot being at an angle of about 40 degrees to 50 degrees with respect to the lower skid, and the second resection slot being at an angle of about 1 degree to 10 degrees with respect to the lower skid;
Femoral preparation guide with.

the first resection slot is for making a first posterior cut in the condyle, the second resection slot is for making a second posterior cut in the condyle; 4. The second rear cut provides a chamfer cut at an angle to the first rear cut, and the first rear cut provides clearance for making the second rear cut. Femoral preparation guide as described in Section 1.

The femoral preparation guide of claim 2, wherein the first posterior cut provides clearance for making the second posterior cut.

The femoral preparation guide of claim 1, wherein the distal portion has a flat surface for engaging a flat resection surface on the condyle.

The distal portion and the posterior portion define an outer circumference, and at least a portion of the outer circumference substantially coincides with a portion of the implant circumference of the femoral condyle implant so that the femoral condyle implant is later installed on the condyle. 2. The femoral preparation guide of claim 1, providing an indication of the position of the femoral condyle implant when the femoral condyle implant is inserted.

The femoral preparation guide of claim 1, wherein the posterior portion includes an area for receiving a shim that provides guidance for measuring a joint space between the femur and a corresponding tibia.

The femoral preparation guide of claim 6, wherein the shim is selected from one of a plurality of shims of different sizes.

The femoral preparation guide of claim 1, wherein the distal portion includes a plurality of guide holes for receiving pins, the guide holes being at different angles with respect to each other.

The femoral preparation guide of claim 1, wherein the femoral preparation guide is part of a kit of a plurality of femoral preparation guides, each femoral preparation guide within the kit corresponding to a particular size of femoral condyle implant. Bone Preparation Guide.

A femoral preparation guide for use on a femoral condyle to receive a femoral condyle implant during a surgical procedure, the guide comprising:
a posterior portion for fitting over the posterior region of the condyle, the posterior portion including a lower skid and a template bore that defines a generally cylindrical opening within a second resection slot; a posterior portion defined;
a distal portion for fitting over a distal region of the condyle, the distal portion being angled relative to the posterior portion, the distal portion and the posterior portion defining an outer circumference; , at least a portion of the periphery of the implant periphery of the femoral condyle implant to provide an indication of the position of the femoral condyle implant on the condyle when the femoral condyle implant is later placed on the condyle. the distal portion includes a first throughbore and a second throughbore, the first throughbore being oriented with respect to a first surface and a second surface. the first surface is perpendicular to the second surface, the first surface intersects the second surface on the central axis of the first through bore, and the first surface intersects the second surface on the central axis of the first through bore; is oriented relative to a third surface and a fourth surface, the third surface being perpendicular to the fourth surface, and the third surface being on a central axis of the second throughbore. a distal portion that intersects the fourth surface at an angle where the third surface and the fourth surface are at an oblique angle with respect to the first surface and the second surface, respectively;
a first resection slot and a second resection slot on the distal portion for receiving a cutting tool for providing two resections of the condyle, the first resection slot being relative to the distal surface; a first resection slot and a second resection slot, the first resection slot being at an angle of about 40 degrees to 50 degrees with respect to the lower skid, and the second resection slot being at an angle of about 1 degree to 10 degrees with respect to the lower skid; Femoral preparation guide with.

the first resection slot is for making a first posterior cut in the condyle, the second resection slot is for making a second posterior cut in the condyle; 11. The femoral preparation guide of claim 10, wherein the second posterior cut provides a beveled cut at an angle to the first posterior cut.

12. The femoral preparation guide of claim 11, wherein the first posterior cut provides clearance for making the second posterior cut.

11. The femoral preparation guide of claim 10, wherein the distal portion has a flat surface for engaging a flat resection surface on the condyle.

11. The femoral preparation guide of claim 10, wherein the posterior portion includes an area for receiving a shim that provides guidance for measuring joint space to the tibia.

15. The femoral preparation guide of claim 14, wherein the shim is selected from one of a plurality of shims of different sizes.

The femoral preparation guide of claim 10, wherein the distal portion includes a plurality of guide holes for receiving pins, the guide holes being at different angles with respect to each other.

11. The femoral preparation guide of claim 10, wherein the femoral preparation guide is part of a kit of a plurality of femoral preparation guides, each femoral preparation guide within the kit corresponding to a particular size of femoral condyle implant. Preparation guide.

A femoral preparation guide for use on a femoral condyle to receive a femoral condyle implant during a surgical procedure, the guide comprising:
a posterior portion for fitting over the posterior region of the condyle, the posterior portion including a lower skid and a template bore, the template bore defining a generally cylindrical opening within a posterior resection slot; ,
a distal portion for fitting over a distal region of the condyle, the distal portion being angled relative to the posterior portion and including a first through bore and a second through bore; The first throughbore is oriented relative to a first surface and a second surface, the first surface being perpendicular to the second surface, and the first surface being perpendicular to the first surface. intersects the second surface on a central axis of the throughbore, the second throughbore is oriented relative to a third surface and a fourth surface, and the third surface is oriented relative to the fourth surface. the third surface intersects the fourth surface on the central axis of the second throughbore, and the third surface and the fourth surface are each perpendicular to the first surface. a distal portion at an oblique angle to the surface and the second surface;
a chamfer cutting slot on the distal portion for receiving a cutting tool for providing a chamfer surface on the condyle, the chamfer cutting slot being at an angle of about 40 degrees to 50 degrees with respect to the distal surface; ,
a femoral preparation guide comprising: the posterior resection slot on the distal portion for receiving a cutting tool, the posterior resection slot being at an angle of about 1 to 10 degrees with respect to the lower skid.

19. The method of claim 18, further comprising a posterior resection slot on the distal portion for receiving a cutting tool for providing a posterior resection of the condyle, the posterior resection slot being angled relative to the chamfered resection slot. Femoral Preparation Guide.

20. The femoral preparation guide of claim 19, wherein the posterior resection slot provides a cut that provides clearance for the cutting tool that provides the chamfered surface.

The distal portion and the posterior portion define an outer circumference, and at least a portion of the outer circumference is indicative of the position of the femoral condyle implant on the condyle when the femoral condyle implant is later placed on the condyle. 20. The femoral preparation guide of claim 18, wherein the femoral preparation guide substantially coincides with a portion of the implant circumference of the femoral condyle implant to provide.

19. The femoral preparation guide of claim 18, wherein the distal portion has a flat surface for engaging a flat resection surface on the condyle.

19. The femoral preparation guide of claim 18, wherein the posterior portion includes an area for receiving a shim that provides guidance for measuring a joint space between the femur and a corresponding tibia.

24. The femoral preparation guide of claim 23, wherein the shim is selected from one of a plurality of shims of different sizes.

19. The femoral preparation guide of claim 18, wherein the distal portion includes a plurality of guide holes for receiving pins, the guide holes being at different angles with respect to each other.

19. The femoral preparation guide of claim 18, wherein the femoral preparation guide is part of a kit of a plurality of femoral preparation guides, each femoral preparation guide within the kit corresponding to a particular size of femoral condyle implant. Bone Preparation Guide.

A femoral preparation guide for use on a femoral condyle to receive a femoral condyle implant during a surgical procedure, the guide comprising:
a posterior part for fitting over the posterior region of the condyle, the posterior part having an attachment element on the lower side of the posterior part;
a distal portion for fitting over the distal region of the condyle;
a shim coupled to the attachment element that serves to provide adequate joint space between the femur and a corresponding tibia, the shim being selected from a plurality of shims; A femoral preparation guide comprising shims, the shims being of different sizes.

28. The femoral preparation guide of claim 27, wherein the shim and the attachment element include a dovetail fit.

28. The femoral preparation guide of claim 27, wherein the shim and the attachment element are coupled via a rotational movement that engages a mating feature.

30. The femoral preparation guide of claim 29, wherein the mating feature is a bayonet key mating portion.

28. The femoral preparation guide of claim 27, wherein the shim includes a curved sagittal plane that follows the radius of the posterior region of the condyle.

A femoral preparation guide for use on a femoral condyle to receive a femoral condyle implant during a surgical procedure, the guide comprising:
a body for fitting over the top of the condyle, the body having one or more slots for guiding one or more resection cuts in the condyle, the body having an outer periphery; At least a portion of the outer circumference is determined by (i) the mediolateral position of the femoral condyle implant that will later be placed on the condyle, (ii) the size of the femoral condyle implant that will be later placed on the condyle, or (iii) ( A femoral preparation guide comprising: a body substantially conforming to a portion of the implant circumference of said femoral condyle implant to provide indicators of both i) and (ii).

A system comprising one or more femoral preparation components for use in a femoral condyle to receive a femoral condyle implant during a surgical procedure, the system comprising:
(i) a posterior portion for fitting the upper portion of the posterior region of the condyle; (ii) a distal portion for fitting the upper portion of the distal region of the condyle; and (iii) a cutting tool providing for resection of the condyle. and (iv) a first guide hole for receiving a drill for creating a first peg hole located on the condyle;
a femoral trial guide for placement above the resected condyle deployed with the femoral preparation guide, the femoral trial guide creating a second peg hole located on the condyle; a femoral trial guide, the first and second peg holes being for receiving a peg on the femoral condylar implant; Prepare for the system.

A system comprising one or more femoral preparation components for use in a femoral condyle to receive a femoral condyle implant during a surgical procedure, the system comprising:
a femoral resection guide block sliding over a spacer component positioned in a region below the condyle, the femoral resection guide block receiving a cutting tool for providing a first resection of the condyle; a femoral resection guide block including a resection slot for;
a femoral preparation guide for attachment to the condyle in the area of the first resection, the femoral preparation guide receiving respective cutting tools for providing a second resection and a third resection of the condyle; a femoral preparation guide having two resection slots for resection, the femoral preparation guide including a first guide hole for receiving a drill for creating a first peg hole located on the condyle; and,
a femoral trial guide for placement above the resected condyle deployed with the femoral preparation guide, the femoral trial guide creating a second peg hole located on the condyle; a femoral trial guide including a second guide hole for receiving a drill for drilling.

A femoral trial guide for use in a femoral condyle receiving a femoral condyle implant during a surgical procedure, the femoral trial guide comprising:
a curved outer surface that mimics the outer surface of a subsequently implanted femoral condyle implant for providing an indication of position and movement of the femoral condyle implant;
a guide hole for receiving a drill for creating a peg hole located on the condyle.