Biological type tackle groove replacement prosthesis

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a biological type tackle groove replacement prosthesis which comprises a prosthesis body, the upper surface of the prosthesis body is a groove-shaped tackle face with the low middle and the two high sides, and the body bottom face of the prosthesis body is a plane and is provided with an installation column used for being inserted into a skeleton to be replaced. A non-return boss protruding outwards in the radial direction of the installation column is arranged on a column body of the installation column, an osseointegration hole for bone tissue to grow in is further formed in the bottom face of the body, the osseointegration hole is a blind hole, and an orifice of the osseointegration hole obliquely points to the lower portion of the prosthesis body outwards. The prosthesis is simple in structure and reasonable in bottom design, and the stability and the reliability of connection between the prosthesis and the thighbone are greatly improved while the implant operation convenience of the prosthesis is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a biological trochlear groove replacement prosthesis. Background Art

[0002] When pet dogs and cats suffer from patellar dislocation due to trochlear injury or developmental deformity, patellar trochlear replacement can be used for treatment. The damaged trochlear groove on the femur needs to be removed and a replacement prosthesis implanted. The trochlear groove replacement prosthesis that is widely used at present is a component product, including a base plate and a trochlear prosthesis with adjacent surfaces forming a plug-in fit. During patellar trochlear replacement surgery, screws are first passed through the base plate to fix it to the distal end of the femur, and then the trochlear prosthesis is pressed and fixed on the base plate. This can achieve an effective connection between the prosthetic component and the femur while maintaining the smoothness and continuity of the trochlear surface. However, in actual application, the connection between the trochlear prosthesis and the base plate may become loose, the trochlear prosthesis may separate and warp from the base plate, or even fall off, which shortens the service life of the prosthesis and requires re-surgical repair.

[0003] In order to overcome the defects of the existing trochlear groove replacement prosthesis assembly, Chinese patent CN217723822U discloses a trochlear replacement system, including a trochlear prosthesis, at least one first fixing member installed on the distal end of the trochlear prosthesis, and at least one second fixing member installed on the distal end of the trochlear prosthesis, wherein the first fixing member is vertically arranged relative to the distal end face of the trochlear prosthesis, and the second fixing member is inclined relative to the distal end face of the trochlear prosthesis, the proximal ends of the first fixing member and the second fixing member are both connected to the distal end of the trochlear prosthesis, and the distal ends of the first fixing member and the second fixing member are both used to be inserted into the bone to be trochlear replaced. Specifically, as shown in the attached specification of the patent, Figure 3 As shown, the two second mounting holes extend from the side of the trochlear prosthesis to the distal end face of the trochlear prosthesis, and the overall arrangement is in an eight-shaped shape. In this way, the two second fixing members arranged opposite each other are inserted into the femur obliquely along the guide of the second mounting holes, which can effectively limit the axial outward displacement of the trochlear prosthesis along the first fixing member. Although this solution can enhance the pullout resistance of the trochlear replacement system, due to the size of the trochlear prosthesis, the spacing between the two second mounting holes on the distal end face of the trochlear prosthesis is small. The portions of the two second fixing members inserted into the femur are arranged closely together or even interfere with each other, making it impossible for the second fixing members to be reliably connected to the femur, or causing the femoral tissue between the two second fixing members to be difficult to heal or even necrotic and detached, thereby affecting the service life of the trochlear replacement system. Utility Model Content

[0004] The utility model aims to provide a biological trochlear groove replacement prosthesis which is stably and reliably connected to the femur.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a biological trochlear groove replacement prosthesis, including a prosthesis body, the upper surface of the prosthesis body is a groove-shaped trochlear surface with a low middle and high sides, the bottom surface of the prosthesis body is flat and is provided with a mounting column for inserting the bone to be replaced, the column body of the mounting column is provided with a non-return boss protruding outward along its radial direction, and the bottom surface of the body is also provided with a bone binding hole for bone tissue to grow into, the bone binding hole is a blind hole, and the opening of the bone binding hole is obliquely pointed outward to the bottom of the prosthesis body.

[0006] Compared with existing technologies, the present invention achieves the following technical benefits: the prosthesis has a simple structure and a rational bottom design, which not only improves the ease of implantation but also significantly enhances the stability and reliability of the connection between the prosthesis and the femur. The mounting post provides a certain degree of immediate stability after implantation, facilitating the rapid recovery of the patient's mobility after surgery. The recessed portion of the non-return boss on the mounting post and the bone-engaging hole allow for bone tissue in-growth, ensuring the long-term stability of the implanted prosthesis and effectively reducing the likelihood of prosthesis loosening or dislodging. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The following is a brief description of the contents and symbols in the drawings of this specification:

[0008] Figure 1 、 2 It is a three-dimensional schematic diagram of embodiment 1;

[0009] Figure 3 is a bottom view of the first embodiment;

[0010] Figure 4 yes Figure 3 AA section view in;

[0011] Figure 5 yes Figure 4 Enlarged schematic diagram of the middle E part;

[0012] Figure 6 yes Figure 3 BB cross-sectional view in;

[0013] Figure 7 、 8 It is a three-dimensional schematic diagram of embodiment 2;

[0014] Figure 9 is a bottom view of the second embodiment;

[0015] Figure 10 yes Figure 9 CC cross-sectional view;

[0016] Figure 11 yes Figure 10 Enlarged schematic diagram of the middle F part;

[0017] Figure 12 yes Figure 9 DD cross-sectional view. DETAILED DESCRIPTION

[0018] The specific implementation of the present invention will be further described in detail below through description of embodiments in conjunction with the accompanying drawings.

[0019] A biological trochlear groove replacement prosthesis includes a prosthesis body 10. The upper surface of the prosthesis body 10 is a groove-shaped trochlear surface 11 with a low center and high sides. Figure 1 、 3 As shown in FIG-5 , the trochlear surface 11 is a smoothly curved surface. In the width direction, the trochlear surface 11 forms a groove-like shape with a low center and high sides. In the length direction, the trochlear surface 11 forms a hill-like shape with a high center and low sides. The patella can slide within the grooves formed in the trochlear surface 11. The ridges on both sides of the trochlear surface 11 in the width direction prevent the patella from dislodging from the sides of the trochlear surface 11, thereby effectively guiding and limiting patellar displacement.

[0020] The bottom surface 12 of the prosthesis body 10 is a plane. Figure 2 、 4 As shown, the bottom surface 12 of the body is provided with a mounting post 20 for insertion into the bone to be replaced. The shaft of the mounting post 20 is provided with a radially outwardly projecting non-return projection 23. In this embodiment, the mounting post 20 is generally cylindrical. The non-return projection 23 comprises a tapered surface extending outward from the overhanging end of the mounting post 20 toward the bottom surface 12 of the body, and an annular table surface connecting the tapered surface with the cylindrical surface of the mounting post 20. Specifically, the non-return projection 23 comprises a tapered surface 23a with a small bottom diameter and a large top diameter. The upper edge of the tapered surface 23a connects to the cylindrical surface of the mounting post 20 via a flat table surface 23b. When implanting the prosthesis, a hole with a diameter smaller than the outer diameter of the circular surface 23b of the non-return boss 23 is drilled into the femur. The prosthesis body 10 is held in a position with the trochlear surface 11 facing the operator, and the overhanging end of the mounting post 20 is pressed against the hole drilled in the femur. The prosthesis body 10 is then pressed downward. The tapered surface 23a of the non-return boss 23 serves to position and guide the mounting post 20 into the hole. The prosthesis body 10 is pressed downward until the bottom surface 12 of the prosthesis body 10 is aligned with the cross-section of the femur. At this point, the shaft of the mounting post 20 is fully accommodated in the hole drilled in the femur, with some bone tissue embedded in the recess between the non-return boss 23 and the shaft of the mounting post 20. The surface 23b of the non-return boss 23 abuts against the bone tissue in the recess, preventing the mounting post 20 from dislodging. This provides immediate stability for the implantation of the prosthesis and facilitates the rapid recovery of the patient's mobility after surgery. After the prosthesis body 10 is implanted for a period of time, bone tissue continues to grow and fills the recess between the non-return boss 23 and the shaft of the mounting post 20, thereby ensuring the long-term stability of the implanted prosthesis.

[0021] To increase the anti-falling performance of the pulley prosthesis, Figure 2 、 4 As shown, in this embodiment, the overhanging end of the mounting post 20 is provided with two non-return bosses 23, as shown in the attached Figure 6 、 9 In the second embodiment shown, two or three non-return bosses 23 are provided on the body of the mounting post 20. In specific implementation, the number of the non-return bosses 23 on the mounting post 20 can be one, two or more according to needs.

[0022] In other embodiments, the mounting post 20 may be non-cylindrical, such as a polygonal cylinder or an elliptical cylinder, etc., so as to be able to be inserted into the cross-section of the femur; the non-return boss 23 may be similar to the present embodiment, being continuously arranged around the column body of the mounting post 20 in a closed ring shape. Of course, it may also be arranged at intervals on the circumference of the mounting post 20 in the form of convex dots or convex strips, so as to ensure that the surface of the non-return boss 23 adjacent to the main body 12 can cooperate with the bone tissue to prevent the mounting post 20 from falling out of the femoral hole along its column core.

[0023] In the preferred embodiment, the mounting post 20 includes a first mounting post 21 arranged in the center and a second mounting post 22 arranged near the outer edge of the prosthesis body 10. In actual application, the middle section of the femoral cross section formed after trochlear osteotomy is composed of loose cancellous bone, while the peripheral side is composed of hard cortical bone. To ensure a stable connection between the middle section of the prosthesis body 10 and the femur, the first mounting post 21 needs to have a larger cross section. Figure 2 、 7 As shown, mounting post 20 is generally cylindrical, and the outer diameter of first mounting post 21 is larger than the outer diameter of second mounting post 22. The connection point between second mounting post 22 and the femoral cross section is adjacent to the cortical bone. Thus, even with a second mounting post 22 having a smaller cross-sectional size, a reliable connection between second mounting post 22 and the femur can be ensured.

[0024] Furthermore, as attached Figure 3 、 8 As shown, the first mounting post 21, located at the center of the bottom surface 12 of the prosthesis body, has a dimension greater than one-third of the maximum width dimension of the prosthesis body 10. This allows the edges of the first mounting post 21 and the check boss 23 provided thereon to be adjacent to the hard cortical bone of the femoral cross-section, thereby enhancing the reliability of the connection between the first mounting post 21 and the femur. However, this makes it difficult to accommodate other mounting posts 20 on either side of the first mounting post 21. Therefore, second mounting posts 22 are placed at either end of the prosthesis body 10 in the longitudinal direction, that is, at the front and rear ends of the prosthesis body 10. At least two second mounting posts 22 are provided.

[0025] Since two or more mounting posts 20 are provided on the bottom surface 12 of the main body, in order to facilitate the implantation operation, the cores of the mounting posts 20 in the embodiment shown in the drawings are arranged perpendicular to the bottom surface 12 of the main body.

[0026] The cantilevered end of the first mounting post 21 is provided with a first non-return boss 231, and the cantilevered end of the second mounting post 22 is provided with a second non-return boss 232. The second mounting post 22 is arranged adjacent to the outer edge of the prosthesis body 10 and is easier to observe than the first mounting post 21. Therefore, in order to improve the accuracy of the implantation position of the prosthesis body 10, the second mounting post 22 also provides a guide for the implantation and installation operation. Figure 4 、 5 As shown, the protrusion heights of the first and second mounting posts 21 and 21 protruding downward from the bottom surface 12 of the body are consistent, and the taper of the first boss conical surface 231a of the first non-return boss 231 arranged adjacent to the overhanging end surface of the first mounting post 21 is greater than the taper of the second boss conical surface 232a of the second non-return boss 232 arranged adjacent to the overhanging end surface of the second mounting post 22. Figure 5 ∠α<∠β, so the attachment is maintained. Figure 4 When the prosthesis body 10 is pressed downward in the posture shown, the second mounting post 22 is easier to enter the corresponding hole on the femur than the first mounting post 21. Specifically, in this embodiment, the two second mounting posts 22 are respectively placed at the front end and the rear end of the first mounting post 21, and the cores of the three mounting posts 20 are located in the same plane and the plane is perpendicular to the bottom surface 12 of the body. In this way, when the prosthesis body 10 is pressed downward, the stability of the prosthesis body 10 in its length direction can be guaranteed. When the prosthesis body 10 is pressed downward and installed in place, the bottom surface 12 of the body fits with the cross section of the femur, which can limit the deflection displacement of the prosthesis body 10 to both sides in its width direction, thereby realizing effective positioning of the prosthesis body 10. Example 2 is shown in the attached figure. Figure 10 、 11 As shown, the distance between the overhanging end surface of the second mounting post 22 and the bottom surface 12 of the body is greater than the distance between the overhanging end surface of the first mounting post 21 and the bottom surface 12 of the body, that is, Figure 11 In the example, h2>h1, the protruding height of the second mounting post 22 is greater than the protruding height of the first mounting post 21, so as to maintain the attachment Figure 10 When the prosthesis body 10 is pressed downwards in the posture, the second mounting post 22 will be connected to the hole opened on the femoral cross section before the first mounting post 21. After the second mounting post 22 arranged around the side of the first mounting post 21 is inserted and connected to the femoral hole, the prosthesis body 10 is kept in the posture and pressed downwards to ensure the reliable connection between the first mounting post 21 and the femur. Furthermore, the maximum distance between the table surface of the second non-return boss 232 and the bottom surface 12 of the body is greater than the maximum distance between the table surface of the first non-return boss 231 and the bottom surface 12 of the body, that is, the attachment Figure 11In the embodiment, d2>d1, so that when the second non-return boss 232 arranged adjacent to the cantilevered end surface of the second mounting post 22 is accommodated in the mounting hole of the femur, the prosthesis 10 can be positioned. In the preferred embodiment, the taper of the first boss tapered surface 231a of the first non-return boss 231 arranged adjacent to the cantilevered end surface of the first mounting post 21 is greater than or equal to the taper of the second boss tapered surface 232a of the second non-return boss 232 arranged adjacent to the cantilevered end surface of the second mounting post 22. Figure 11 Specifically, this embodiment is provided with three second mounting posts 22, as shown in the attached Figure 8 、 9 As shown, the three second mounting columns 22 have the same column shape and the same protruding height. The three second mounting columns 22 are symmetrically arranged on the bottom surface 12 of the main body relative to the symmetry axis a of the bottom surface of the main body. This can effectively maintain the posture of the prosthesis body 10 during the press-fitting process of the prosthesis body 10 and avoid large-angle deflection of the prosthesis body 10.

[0027] For the convenience of description, the above and below are based on Figure 4 、 Figure 10 The posture of the prosthesis body 10 is defined.

[0028] To ensure the long-term stability of the biological trochlear groove replacement prosthesis, Figure 2 、 8 As shown, the bottom surface 12 of the prosthesis body is provided with a bone-binding hole 30 for bone tissue to grow into. The bone-binding hole 30 is a blind hole, that is, the bone-binding hole 30 is spaced apart from the trochlear surface 11, ensuring that the trochlear surface 11 has a continuous and smooth curved surface and can stably and reliably provide support and sliding guidance for the patella. The opening of the bone-binding hole 30 is obliquely outward and points downward to the bottom of the prosthesis body 10, that is, the bottom of the bone-binding hole 30 is adjacent to the center of the trochlear surface 11, and the opening points away from the center of the trochlear surface 11. Figure 6 、 10 As shown in Figures 1 and 12, the core line of the bone bonding hole 30 intersects with the bottom surface 12 of the body, and the core line of the bone bonding hole 30 and the perpendicular line passing through the center of the bottom surface 12 of the body intersect above the bottom surface 12 of the body, or the core line of the bone bonding hole 30 and the perpendicular line passing through the center of the bottom surface 12 of the body are skew lines and the common perpendicular line of the two is located above the bottom surface 12 of the body. When the prosthesis body 10 is implanted, bone tissue can grow into the bone bonding hole 30 to form a biological fixation, thereby ensuring the long-term stability of the implanted prosthesis. The cavity of the bone bonding hole 30 is tilted. Compared with the common bone growth hole in which the cavity is arranged perpendicular to the bottom surface 12 of the body, the bone tissue can grow obliquely upward into the bone bonding hole 30 and abut against the wall of the bone bonding hole 30, which can effectively limit the displacement of the bottom surface 12 of the prosthesis body away from the femoral cross-section, thereby avoiding the occurrence of loosening or falling off of the prosthesis body 10 after long-term implantation.

[0029] Example 1 is as shown in the attached Figure 2 、3 As shown, the bone-integrating hole 30 includes a first hole 31 and a second hole 32. The core lines of the first hole 31 and the second hole 32 intersect above the bottom surface 12 of the body, or the core lines of the first hole 31 and the second hole 32 are skew lines and the common perpendicular line segment of the two is located above the bottom surface 12 of the body. Figure 6 As shown, the cavities of the first and second holes 31, 32 are arranged in a figure-eight pattern. This allows bone tissue growing into the cavities to interlock with the prosthesis 10, thereby ensuring a tight connection between the prosthesis bottom surface 12 and the femoral cross-section. In this embodiment, the bone-engaging holes 30 are distributed throughout the prosthesis bottom surface 12, allowing bone tissue to grow as much as possible and securely connect with the prosthesis body 10. To facilitate machining, the first and second holes 31, 32 are located on either side of the symmetry axis a of the prosthesis bottom surface, enabling simultaneous machining of the first and second holes 31, 32 from the prosthesis bottom surface 12. Furthermore, in this embodiment, the first holes 31, with their cores arranged parallel to each other, form a first hole group 31a, while the second holes 32, with their cores arranged parallel to each other, form a second hole group 32a. The first and second hole groups 31a, 32a are located on opposite sides of the prosthesis bottom surface 12. This allows the drill bits for each of the first and second holes 31, 32 to be drilled from either side of the prosthesis bottom surface 12, thereby enabling machining of all bone-engaging holes 30.

[0030] Furthermore, in the first embodiment, the cavities of adjacent bone-bonding holes 30 in the same hole group are connected. Figure 2 、 6 As shown, the adjacent hole walls of two adjacent bone-engaging holes 30 with parallel hole cores are connected to form a gap 34, so that the newly formed bone tissue is connected as a whole, and the connection with the prosthesis body 10 is more tightly and firmly. In other embodiments, the bottoms of two adjacent bone-engaging holes 30 with non-parallel hole cores can also be connected.

[0031] Example 2 Figure 8 、 9 As shown in Figures 10 and 12, two second mounting posts 22 are provided at intervals at the rear end of the prosthesis body 10. Due to the obstruction of the second mounting posts 22, it is difficult to process the first hole 31 and the second hole 32 on the bottom surface 12 of the body between the rear ends of the prosthesis body 10. Therefore, the bone bonding hole 30 in this embodiment also includes a third hole 33, and the surface where the hole core line of the third hole 33 is located intersects with the hole core line of the first hole 31 or the second hole 32. In this way, not only more bone bonding holes 33 can be arranged on the bottom surface 12 of the body, but the third holes 33 for bone tissue growth can also further limit the displacement of the prosthesis body 10 on the femoral cross section. Similarly, for the convenience of processing, the third holes 33 with parallel hole cores form a third hole group 33a. Similar to the first embodiment, the bone bonding holes 30 in this embodiment are all over the bottom surface 12 of the body. As shown in the attached figure, Figure 9As shown, the first hole 31 and the second hole 32 are respectively placed on both sides of the symmetry axis a of the bottom surface of the body, and the third hole 33 is spaced and symmetrically arranged between the mounting posts 20 on both sides of the symmetry axis a of the bottom surface of the body. The core line of the third hole 33 is perpendicular to the surface where the core line of the first hole 31 or the second hole 32 is located. The difference between this embodiment and the first embodiment is that the third hole 33 is connected to the bottom of the adjacent first hole 31 or the second hole 32, forming a hole as shown in the attached figure. Figure 8 The through hole 35 shown in the figure allows the bone tissue to be connected as one at the through hole 35.

[0032] See attached Figure 8 In this embodiment, bone integration holes 30 are respectively provided on both sides of the prosthesis body 10. The bone integration holes 30 located on the side of the prosthesis body 10 are located at the bottom of the side wall, or at the junction of the side wall of the prosthesis body 10 and the bottom surface 12 of the body. In this way, the new bone tissue can grow upward and press against the bottom of the side wall of the prosthesis body 10, effectively limiting the displacement of the prosthesis body 10 in its width direction.

[0033] In the preferred embodiment, the distance between the bottom of the bone-engaging hole 30 and the bottom surface 12 of the body is less than 2 mm. This allows for as much bone tissue as possible to grow into the prosthesis body 10 while ensuring the stability of the bottom structure of the prosthesis body 10, thereby ensuring the long-term implantation reliability of the bio-type trochlear groove replacement prosthesis.

[0034] Embodiments 1 and 2 are as shown in the attached Figure 3 、 9 As shown, the body bottom surface 12, the mounting posts 20, and the bone engagement holes 30 disposed thereon are all arranged axially symmetrically, with the body bottom surface symmetry axis a parallel to the length of the trochlear surface 11 and located at the center of the trochlear surface 11 in the width direction. In actual applications, the body bottom surface 12, the mounting posts 20, and the bone engagement holes 30 can also be adaptively adjusted to form an asymmetrical arrangement.

[0035] When the present bio-type trochlear groove replacement prosthesis is in the implanted state, the mounting post 20 at the bottom of the prosthesis body 10 passes through the femoral cross section and is accommodated within the femur, allowing the bottom surface of the prosthesis body 10 to fit the femoral cross section. The dimension of the implanted trochlear prosthesis protruding outward from the femoral cross section is the maximum distance between the body bottom surface 12 and the trochlear surface 11. Compared with currently widely used component products, the present invention omits the base plate component, thereby reducing the protruding height of the implanted prosthesis relative to the femoral cross section. In other words, the space occupied by the replaced prosthesis within the animal's joint capsule is reduced. This not only facilitates the surgeon's suturing of the animal's joint capsule, but also provides more room for the patella to move within the animal's joint capsule, making the patella's sliding motion smoother and unobstructed. Compared with the pulley replacement system disclosed in Chinese patent CN217723822U, by adding mounting columns 20 and bone integration holes 30 at the bottom of the prosthesis, the protruding height of the implanted prosthesis can be maintained at a lower level without providing additional components such as a base plate or fixing parts, so as to ensure that there is sufficient space for movement in the joint capsule, thereby improving the reliability and stability of the pulley prosthesis implantation while ensuring that the joint can move flexibly after the prosthesis is implanted.

Claims

1. A biological trochlear groove replacement prosthesis, comprising a prosthesis body (10), wherein the upper surface of the prosthesis body (10) is a groove-shaped trochlear surface (11) with a lower middle portion and higher sides, characterized in that: The bottom surface (12) of the prosthesis body (10) is flat and is provided with a mounting column (20) for inserting the bone to be replaced. The column body of the mounting column (20) is provided with a non-return boss (23) protruding outward along its radial direction. The bottom surface (12) of the body is also provided with a bone binding hole (30) for bone tissue to grow into. The bone binding hole (30) is a blind hole, and the opening of the bone binding hole (30) is obliquely pointed outwardly below the prosthesis body (10).

2. The biological trochlear groove replacement prosthesis according to claim 1, characterized in that: The bone-integrating hole (30) comprises a first hole (31) and a second hole (32), wherein the hole core lines of the first hole (31) and the second hole (32) intersect above the bottom surface (12) of the body, or the hole core lines of the first hole (31) and the second hole (32) are skew straight lines and a common perpendicular line segment between the two is located above the bottom surface (12) of the body.

3. The biological trochlear groove replacement prosthesis according to claim 2, characterized in that: The first holes (31) arranged in parallel with the hole cores form a first hole group, and the second holes (32) arranged in parallel with the hole cores form a second hole group. The first hole group and the second hole group are placed on opposite sides of the bottom surface (12) of the body.

4. The biological trochlear groove replacement prosthesis according to claim 2, characterized in that: The bone-integrating hole (30) includes a third hole (33), the surface where the hole core line of the third hole (33) is located intersects with the hole core line of the first hole (31) or the second hole (32), and the third holes (33) arranged in parallel with the hole cores form a third hole group.

5. The biological trochlear groove replacement prosthesis according to claim 1, characterized in that: The adjacent hole walls of two bone-joining holes (30) arranged adjacently and having parallel hole cores are penetrated to form a notch (34).

6. The biological trochlear groove replacement prosthesis according to claim 3, characterized in that: The third hole (33) is connected to the bottom of the adjacent first hole (31) or the second hole (32).

7. The biological trochlear groove replacement prosthesis according to claim 1, characterized in that: Bone-bonding holes (30) are provided at the bottom of the two side walls of the prosthesis body (10) or at the junction of the side walls of the prosthesis body (10) and the bottom surface (12) of the body. The distance between the bottom of the bone-bonding hole (30) and the bottom surface (12) of the body is less than 2 mm.

8. The biological trochlear groove replacement prosthesis according to claim 2, characterized in that: The bottom surface (12) of the main body and the mounting column (20) and the bone coupling hole (30) provided thereon are arranged in an axisymmetric manner. The symmetry axis (a) of the bottom surface of the main body is parallel to the length direction of the trochlear surface (11) and is located at the center of the width direction of the trochlear surface (11).

9. The biological trochlear groove replacement prosthesis according to claim 8, characterized in that: The bone-integrating holes (30) are distributed throughout the bottom surface (12) of the main body, and the first hole (31) and the second hole (32) are respectively arranged on both sides of the symmetry axis (a) of the bottom surface of the main body; the third hole (33) is arranged between the mounting posts (20) spaced and symmetrically arranged on both sides of the symmetry axis (a) of the bottom surface of the main body, and the hole core line of the third hole (33) is perpendicular to the surface where the hole core line of the first hole (31) or the second hole (32) is located.

10. The biological trochlear groove replacement prosthesis according to any one of claims 1 to 9, characterized in that: The mounting column (20) includes a first mounting column (21) arranged in the center and a second mounting column (22) arranged along the outer periphery of the prosthesis body (10). The cantilevered end of the first mounting column (21) is provided with a first non-return boss (231), and the cantilevered end of the second mounting column (22) is provided with a second non-return boss (232).

11. The biological trochlear groove replacement prosthesis according to claim 10, characterized in that: The mounting post (20) is cylindrical in shape as a whole. The outer diameter of the first mounting post (21) is larger than the outer diameter of the second mounting post (22). There are at least two second mounting posts (22).

12. The biological trochlear groove replacement prosthesis according to claim 10, characterized in that: The dimension of the first mounting column (21) in the width direction of the prosthesis body (10) is greater than 1 / 3 of the maximum dimension of the prosthesis body (10) in the width direction, and the front end and the rear end of the prosthesis body (10) are respectively provided with second mounting columns (22).

13. The biological trochlear groove replacement prosthesis according to claim 10, characterized in that: The maximum distance between the table surface of the second non-return boss (232) and the bottom surface (12) of the main body is greater than the maximum distance between the table surface of the first non-return boss (231) and the bottom surface (12) of the main body.

14. The biological trochlear groove replacement prosthesis according to claim 10, characterized in that: The non-return boss (23) comprises a conical surface (23a) with a small bottom diameter and a large top diameter, and the upper edge of the conical surface (23a) is connected to the cylindrical surface of the flat table surface (23b) mounting column (20); the taper of the first boss conical surface (231a) of the first non-return boss (231) arranged adjacent to the overhanging end surface of the first mounting column (21) is greater than or equal to the taper of the second boss conical surface (232a) of the second non-return boss (232) arranged adjacent to the overhanging end surface of the second mounting column (22).

15. The biological trochlear groove replacement prosthesis according to claim 10, characterized in that: The protruding height of the second mounting post (22) is greater than or equal to the protruding height of the first mounting post (21).

16. The biological trochlear groove replacement prosthesis according to claim 10, characterized in that: The column core of the installation column (20) is perpendicular to the bottom surface (12) of the main body, and the overhanging end of the installation column (20) is provided with two or more non-return bosses (23).

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