CN115944435B

CN115944435B - Patella prosthesis

Info

Publication number: CN115944435B
Application number: CN202310242054.8A
Authority: CN
Inventors: 王彩梅
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-07-14
Anticipated expiration: 2043-03-14
Also published as: CN115944435A

Abstract

The present invention provides a patella prosthesis comprising: the patella prosthesis body, the surface of the patella prosthesis body is provided with a sliding groove matching part; the convex plate is connected to the patella prosthesis main body and protrudes to the outer side of the patella prosthesis main body, and a soft tissue connecting part is arranged on the convex plate. The technical scheme of the application effectively solves the problem that the patella prosthesis cannot be installed when the residual patella after osteotomy is smaller or thinner in the related technology.

Description

Patella prosthesis

Technical Field

The invention relates to the field of medical instruments, in particular to a patella prosthesis.

Background

The patella is positioned in front of the knee joint, the front of the lower end of the femur is the largest seed bone in the human body, embedded in the tendon of four head of femur, and is jointed with the patella surface of the femur to participate in the composition of the knee joint. The patella has the functions of protecting the knee joint and avoiding the friction of femoral quadriceps tendons on the cartilage surface of femoral condyles, and has the functions of transmitting the force of the femoral quadriceps muscles and participating in forming a knee extension device; the knee joint has the functions of maintaining the stability of the knee joint in a semi-squatting position, preventing excessive adduction, abduction and stretch-flexion movement of the knee joint, and increasing the turning capability of the knee joint due to the action of a vehicle chain. The patella prosthesis replacement is mainly applied to clinical treatment of diseases such as patella malacia (CP, chondromalacia patellae), patella articular osteoarthritis (Patellofemoral osteroarthritis), patella fracture, artificial total knee arthroplasty (TKA, total knee arthroplasty) or simple patella prosthesis revision (Isolated patellar revision).

The largest trochlear joint in the human body is the patella and the femoral canal joint, i.e., the patella joint, and the patella can slide on the femoral canal when the femoral canal and the patella are associated. Along with the knee joint bending and stretching, the patella can slide on the femur chute to be positioned at different positions, so that normal bending and stretching activities and functional training of the knee joint can be matched.

The patella replacement in the related art is incomplete replacement, and after the original patella is subjected to osteotomy, the patella prosthesis is fixedly connected with the rest patella after osteotomy by using a plurality of screws. However, when the original patella is smaller, the residual patella after osteotomy is smaller, the setting of a plurality of screws is inconvenient for the residual patella after osteotomy due to the size reasons, the stability of the connection between the patella prosthesis and the residual patella after osteotomy can be affected by reducing the use quantity of the screws, and then the patella prosthesis cannot be installed. When the number of the patella to be cut off is large, the residual patella after the osteotomy is thinner, the residual patella after the osteotomy has poor strength, so that the connection reliability of the patella prosthesis and the residual patella after the osteotomy can be affected, and the patella prosthesis cannot be installed.

Disclosure of Invention

The invention mainly aims to provide a patella prosthesis, which solves the problem that the patella prosthesis cannot be installed when the residual patella after osteotomy is smaller or thinner in the related art.

In order to achieve the above object, the present invention provides a patella prosthesis comprising: the patella prosthesis body, the surface of the patella prosthesis body is provided with a sliding groove matching part; the convex plate is connected to the patella prosthesis main body and protrudes to the outer side of the patella prosthesis main body, and a soft tissue connecting part is arranged on the convex plate.

Further, the patella prosthesis body is rotatably disposed relative to the flange.

Further, the axis of rotation of the patella prosthetic body is perpendicular to the surface of the patella prosthetic body that intersects the flange.

Further, the patella prosthesis body is rotatably coupled to the flange by a mating of an annular projection disposed on one of the flange and the patella prosthesis body and an annular groove disposed on the other of the flange and the patella prosthesis body.

Further, the soft tissue connecting part is a suture hole or a suture groove.

Further, the soft tissue connecting part is provided with a plurality of suture holes, and the suture holes are distributed on two sides of the patella prosthesis main body.

Further, the patella prosthesis body comprises a first body and a second body which are connected, the first body is rotatably connected with the convex plate, and the sliding groove matching part is arranged on the surface of the second body, which is away from the first body.

Further, the first main body is made of rigid materials, and the second main body is made of flexible materials.

Further, a surface of the first body facing the second body is provided with a first adhesive accommodating groove, and a surface of the second body facing the first body is provided with a second adhesive accommodating groove communicating with the first adhesive accommodating groove.

Further, the first adhesive receiving groove includes a first groove section and a second groove section connected with the first groove section, the second groove section is away from the second body relative to the first groove section, and a groove width of the second groove section is larger than a groove width of the first groove section.

Further, an insertion protrusion is provided on a groove side wall of the second adhesive accommodation groove, and the insertion protrusion is provided to extend from an outside of the second adhesive accommodation groove to an inside of the second adhesive accommodation groove.

Further, the embedding protruding is a plurality of, and a plurality of embedding protruding circumference interval arrangement along the second adhesive holding tank, and the embedding protruding includes evagination arc and connects two indent arc in evagination arc both sides, and two indent arc are connected on the groove lateral wall of second adhesive holding tank.

By applying the technical scheme of the invention, the patella prosthesis comprises: a patella prosthesis body and a flange. The surface of the patella prosthesis main body is provided with a chute matching part which is matched with the femur chute of a human body, so that the patella prosthesis can slide on the femur chute more smoothly, and the patella prosthesis can be better matched with normal flexion and extension activities of a knee joint. The convex plate is connected to the patella prosthesis main body and protrudes to the outer side of the patella prosthesis main body, and the convex plate is provided with a soft tissue connecting part. The soft tissue connection portion on the convex plate is connected to the tendon of quadriceps femoris and the patellar ligament, so that the patellar prosthesis body can be connected to the tendon of quadriceps femoris and the patellar ligament through the convex plate. In this way, the patella prosthesis can be fixed at the femur chute through the connection of the tendons of the quadriceps femoris and the soft tissue connection part of the patella ligament and the convex plate, so that the problem that the patella prosthesis is replaced by the residual patella after osteotomy in the related art is avoided. Therefore, the technical scheme of the application effectively solves the problem that the patella prosthesis cannot be installed when the residual patella after osteotomy is smaller or thinner in the related technology.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows a schematic side view of an embodiment of a patella prosthesis according to the present invention in connection with the tendons of the quadriceps and the patellar ligament;

fig. 2 shows a schematic perspective view of the patella prosthesis of fig. 1;

FIG. 3 shows a schematic side view of the patella prosthesis of FIG. 2;

fig. 4 shows a schematic front view of the patella prosthesis of fig. 2;

FIG. 5 shows a schematic cross-sectional view of the patella prosthesis of FIG. 4 in the A-A direction;

fig. 6 shows a schematic side view of the patella prosthesis body of the patella prosthesis of fig. 2;

FIG. 7 shows a schematic perspective view of the convex plate of the patella prosthesis of FIG. 2;

fig. 8 shows a schematic perspective view of the second body of the patella prosthesis of fig. 2;

fig. 9 shows a schematic side view of the second body of the patella prosthesis of fig. 8;

fig. 10 shows a schematic cross-sectional view of the second body of the patella prosthesis of fig. 8;

fig. 11 shows a schematic bottom view of the second body of the patella prosthesis of fig. 2;

fig. 12 shows a schematic bottom view of the first body of the patella prosthesis of fig. 2;

fig. 13 shows a schematic cross-sectional view of the first body of the patella prosthesis of fig. 2.

Wherein the above figures include the following reference numerals:

10. a patella prosthesis body; 11. a first body; 12. a second body; 13. a chute mating portion; 14. an annular groove; 15. a first adhesive accommodating groove; 151. a first trough section; 152. a second trough section; 16. a second adhesive accommodating groove; 17. embedding the bulge; 171. a convex arc section; 172. a concave arc section;

20. a convex plate; 21. stitching the hole; 22. an annular protrusion; 23. a ring plate; 24. a first convex section; 25. a second convex section;

30. tendons of quadriceps femoris;

40. the patellar ligament.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

As shown in fig. 1 to 5, the patella prosthesis includes: the patella prosthesis body 10 and the flange 20. The surface of the patella prosthesis body 10 has a sliding groove mating portion 13. The convex plate 20 is connected to the patella prosthesis body 10 and protrudes outward of the patella prosthesis body 10, and the convex plate 20 is provided with a soft tissue connecting portion.

By applying the technical scheme of the embodiment, the patella prosthesis comprises: the patella prosthesis body 10 and the flange 20. The surface of the patella prosthesis main body 10 is provided with a chute matching part 13, and the chute matching part 13 is matched with the femur chute of a human body so as to enable the patella prosthesis to slide on the femur chute more smoothly, and enable the patella prosthesis to better match the normal flexion and extension activities of the knee joint. The convex plate 20 is connected to the patella prosthesis body 10 and protrudes outward of the patella prosthesis body 10, and the convex plate 20 is provided with a soft tissue connecting portion. The soft tissue connection on the flange 20 is connected to the tendon 30 of quadriceps and the patellar ligament 40 so that the patellar prosthesis body 10 can be connected to the tendon 30 of quadriceps and the patellar ligament 40 through the flange 20. In this way, by connecting the tendon 30 of quadriceps femoris and the patellar ligament 40 with the soft tissue connecting portion of the convex plate 20, the patella prosthesis can be fixed at the femoral runner, avoiding the problem of replacing the patella prosthesis depending on the remaining patella after osteotomy in the related art. Therefore, the technical solution of the present embodiment effectively solves the problem that the patella prosthesis cannot be installed when the remaining patella after osteotomy is smaller or thinner in the related art.

As shown in fig. 1 to 5, the patella prosthesis body 10 is rotatably disposed with respect to the convex plate 20, so that after the convex plate 20 is connected with the tendon 30 of quadriceps femoris and the patellar ligament 40, the patella prosthesis body 10 can rotate with respect to the convex plate 20 according to the shapes of different femoral runners, so that the runner engaging portion 13 on the patella prosthesis body 10 can be better engaged with the femoral runners of different shapes, so that the patella prosthesis can be adapted to the different femoral runners, and the adaptability of the patella prosthesis is improved.

In an embodiment not shown in the figures, the patella prosthesis body is fixedly connected to the flange.

As shown in fig. 1 to 5, the rotation axis of the patella prosthesis body 10 is perpendicular to the surface of the patella prosthesis body 10 intersecting the convex plate 20, so that the rotation of the patella prosthesis body 10 relative to the convex plate 20 is smoother, and the reliability and stability of the patella prosthesis are improved.

As shown in fig. 1 to 10, the patella prosthesis body 10 and the convex plate 20 are rotatably connected by the cooperation of the annular projection 22 and the annular groove 14, the cooperation of the annular projection 22 and the annular groove 14 makes the rotation between the patella prosthesis body 10 and the convex plate 20 smoother and more reliable, and the annular projection 22 and the annular groove 14 have simple and reliable structures and are convenient for processing. Annular projection 22 is provided on the boss 20 and annular groove 14 is provided on the patella prosthetic body 10 to make the structure of the patella prosthetic body 10 more compact.

In an embodiment not shown in the figures, an annular protrusion is provided on the patella prosthesis body and an annular groove is provided on the flange.

As shown in fig. 1 to 7, the soft tissue connection portion is a suture hole 21, and the suture hole 21 is provided to facilitate connection of the soft tissue connection portion with the tendon 30 of quadriceps femoris and the patellar ligament 40, and to facilitate suture operation, so that connection of the patellar prosthesis with the tendon 30 of quadriceps femoris and the patellar ligament 40 is more convenient and reliable.

In an embodiment not shown in the figures, the soft tissue connection is a suture slot.

As shown in fig. 1 to 7, the soft tissue connecting portion has a plurality of suture holes 21, and the suture holes 21 are plural. The plurality of suture holes 21 are distributed on both sides of the patella prosthesis body 10, so that the stress is more uniform when the soft tissue connection part on the convex plate 20 is connected with the tendon 30 of quadriceps femoris and the patella ligament 40, so that the stress of the patella prosthesis is more uniform, and the reliability of the connection of the patella prosthesis with the tendon 30 of quadriceps femoris and the patella ligament 40 is further improved.

As shown in fig. 1 to 13, the patella prosthesis body 10 includes a first body 11 and a second body 12 that are connected. The first body 11 is rotatably connected with the convex plate 20, and the chute-fitting portion 13 is provided on a surface of the second body 12 facing away from the first body 11. In this way, when different sliding groove matching parts 13 are needed to be selected according to different femur sliding grooves, or when patella prostheses with different thicknesses are needed to be selected, only the second main body 12 is needed to be replaced or processed, so that the processing process of the patella prostheses is simplified, and the adaptability of the patella prostheses is improved.

In this embodiment, the sliding groove matching portion 13 is an arc-shaped protrusion which is disposed on the second main body 12 and is matched with the shape of the femur sliding groove, so that abrasion of the sliding groove matching portion 13 when sliding in the femur sliding groove is reduced, sliding track of the patella prosthesis when sliding on the femur sliding groove is improved, and stability of the joint is increased. The portion of the second body 12 facing the first body 11 is nested within the first body 11.

In an embodiment not shown in the drawings, the chute-fitting portion is an arc-shaped protrusion provided on the second body.

As shown in fig. 1 to 13, the first body 11 is a first flat body, and the second body 12 is a second flat body, so as to adapt to the structure of the femur chute and the knee joint, and make the structure of the patella prosthesis body 10 more compact, so as to adapt to the requirements of different volumes or different structures of the patella prosthesis, and improve the adaptability of the patella prosthesis. The convex plate 20 comprises a ring plate 23 surrounding the outer side of the first flat body, and a first convex section 24 and a second convex section 25 arranged on two opposite sides of the ring plate 23, and a plurality of stitching holes 21 are arranged on the first convex section 24 and the second convex section 25 at intervals. The first convex segment 24 and the second convex segment 25 facilitate the arrangement of the suture holes, and the convex plate after the suture holes are arranged can keep the required structural strength and the structure compact, so as to adapt to the requirements of different volumes or different structures of the patella prosthesis and improve the adaptability of the patella prosthesis.

In the present embodiment, the annular protrusion is provided on the ring plate 23, and the annular protrusion 22 is integral with the ring plate 23.

As shown in fig. 1 to 13, the first body 11 is made of a rigid material, and the second body 12 is made of a flexible material. In this way, the first body 11 made of a rigid material and the convex plate 20 are rotatably connected, and the stability and reliability of the connection between the first body 11 and the convex plate 20 can be improved. The first body 11 is made of a rigid material, which can improve the structural strength of the first body 11, so as to improve the structural strength and reliability of the patella prosthesis. The second main part 12 is flexible material, can make the spout cooperation portion 13 on the second main part 12 when cooperating with the femur spout, can alleviate the stress concentration phenomenon of spout cooperation portion 13 on the second main part 12, reduce the contact stress of spout cooperation portion 13, play the effect of buffering, experience when improving the patella prosthesis and feel to because the atress of second main part 12 is more even, can improve the service life of patella prosthesis.

In this embodiment, the convex plate 20 is preferably made of medical polyurethane, and the first body 11 is preferably made of cobalt chromium molybdenum material or zirconium niobium alloy material. The second body 12 is preferably a polyethylene material (e.g., high molecular weight polyethylene, high crosslinked polyethylene, VE-containing polyethylene material) or a polyurethane material. The convex plate 20, the outer sidewall of the first body 11 and the outer sidewall of the second body 12 are all subjected to high polishing treatment to prevent damage to soft tissues of the human body.

As shown in fig. 2 to 13, the surface of the first body 11 facing the second body 12 is provided with a first adhesive accommodating groove 15, and the surface of the second body 12 facing the first body 11 is provided with a second adhesive accommodating groove 16 communicating with the first adhesive accommodating groove 15. In this way, the first and

second bodies

11 and 12 can be adhesively fixed by placing the adhesive into the first and second

adhesive receiving grooves

15 and 16, facilitating the connection of the first and

second bodies

11 and 12. In this embodiment, the binder is bone cement.

As shown in fig. 2 to 13, the first adhesive receiving groove 15 includes a first groove section 151 and a second groove section 152 connected to the first groove section 151. The second channel section 152 is remote from the second body 12 relative to the first channel section 151, the second channel section 152 having a channel width greater than the channel width of the first channel section 151. Thus, after the adhesive in the second groove section 152 is cured, the adhesive cured in the second groove section 152 is caught in the second groove section 152 due to the wider groove width of the second groove section 152 and the distance from the second body 12, so that the adhesive cured in the second groove section 152 can be stably fixed in the second groove section 152, so that the adhesive can reliably connect the first body 11 and the second body 12.

As shown in fig. 2 to 13, a collar is provided on the groove sidewall of the first groove section 151, and can be inserted into the adhesive, and when the adhesive is cured, the collar is inserted into the cured adhesive to improve the reliability of the connection of the first groove section 151 with the adhesive, so that the adhesive can reliably connect the first body 11 and the second body 12.

As shown in fig. 2 to 13, the second adhesive accommodation groove 16 is provided with an insertion protrusion 17 on a groove side wall, and the insertion protrusion 17 is provided to extend from the outside of the second adhesive accommodation groove 16 to the inside of the second adhesive accommodation groove 16. The insertion protrusion 17 can be inserted into the adhesive, and when the adhesive is cured, the insertion protrusion 17 is inserted into the cured adhesive to improve the reliability of the connection of the second adhesive receiving groove 16 with the adhesive, so that the adhesive can reliably connect the first body 11 and the second body 12.

As shown in fig. 2 to 13, the insertion projections 17 are plural, and the plural insertion projections 17 are arranged at intervals in the circumferential direction of the second adhesive accommodation groove 16. The provision of the plurality of embedded protrusions 17 further improves the reliability of the connection of the second adhesive accommodating groove 16 with the adhesive. The embedded protrusion 17 includes a male arc section 171 and two female arc sections 172 connected to both sides of the male arc section 171, the two female arc sections 172 being connected to the groove side walls of the second adhesive receiving groove 16. The arrangement of the convex arc sections 171 and the concave arc sections 172 can effectively increase the contact area between the embedded protrusion 17 and the adhesive, so as to increase the volume of the embedded protrusion 17 embedded into the adhesive, and further improve the reliability of the connection between the second adhesive accommodating groove 16 and the adhesive.

In this embodiment, the original patella is completely removed, and the patella prosthesis is fixed at the femoral runner by the connection of the tendon 30 of quadriceps femoris and the patellar ligament 40 with the soft tissue connecting portion of the convex plate 20.

In an embodiment not shown in the figures, the original patella is left after osteotomy. The outer side wall of the first main body is provided with a porous structure so that the residual patella after osteotomy can grow into the porous structure, thereby facilitating the connection of the patella prosthesis and the residual patella after osteotomy.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A patella prosthesis comprising:

a patella prosthesis body (10), the surface of the patella prosthesis body (10) having a runner mating portion (13);

a convex plate (20) connected to the patella prosthesis main body (10) and protruding to the outer side of the patella prosthesis main body (10), wherein a soft tissue connecting part is arranged on the convex plate (20);

wherein the patella prosthesis body (10) comprises a first body (11) and a second body (12) connected;

a first adhesive accommodating groove (15) is formed in the surface of the first main body (11) facing the second main body (12), and a second adhesive accommodating groove (16) communicated with the first adhesive accommodating groove (15) is formed in the surface of the second main body (12) facing the first main body (11);

the first adhesive accommodating groove (15) comprises a first groove section (151) and a second groove section (152) connected with the first groove section (151), the second groove section (152) is far away from the second main body (12) relative to the first groove section (151), and the groove width of the second groove section (152) is larger than that of the first groove section (151);

the patella prosthesis body (10) is rotatably disposed relative to the flange (20);

the patella prosthesis body (10) is rotatably connected with the convex plate (20) by the cooperation of an annular protrusion (22) and an annular groove (14), the annular protrusion (22) is arranged on one of the convex plate (20) and the patella prosthesis body (10), and the annular groove (14) is arranged on the other of the convex plate (20) and the patella prosthesis body (10);

the first main body (11) is rotatably connected with the convex plate (20), and the sliding groove matching part (13) is arranged on the surface of the second main body (12) facing away from the first main body (11);

the first main body is a first flat body, the second main body is a second flat body, the convex plate comprises a ring plate (23) which is arranged on the outer side of the first flat body in a surrounding mode, a first convex section (24) and a second convex section (25) which are arranged on two opposite sides of the ring plate (23), and the soft tissue connecting portion is arranged on the first convex section (24) and the second convex section (25).

2. The patellar prosthesis according to claim 1, characterized in that the rotation axis of the patellar prosthesis body (10) is perpendicular to the surface of the patellar prosthesis body (10) intersecting the convex plate (20).

3. The patellar prosthesis according to claim 1, wherein the soft tissue connection is a suture hole (21) or a suture groove.

4. The patellar prosthesis according to claim 1, wherein the soft tissue connecting parts are suture holes (21), the suture holes (21) are plural, and the suture holes (21) are distributed on two sides of the patellar prosthesis body (10).

5. The patellar prosthesis according to claim 1, wherein the first body (11) is a rigid material and the second body (12) is a flexible material.

6. The patella prosthesis according to claim 1, characterized in that the groove side wall of the second adhesive-receiving groove (16) is provided with an insertion projection (17), the insertion projection (17) extending from the outside of the second adhesive-receiving groove (16) to the inside of the second adhesive-receiving groove (16).

7. The patellar prosthesis according to claim 6, wherein the insertion protrusion (17) is a plurality of insertion protrusions (17) arranged at intervals along the circumference of the second adhesive receiving groove (16), the insertion protrusion (17) comprising a male arc section (171) and two female arc sections (172) connected to both sides of the male arc section (171), the two female arc sections (172) being connected to groove side walls of the second adhesive receiving groove (16).