Tibial prosthesis and knee joint prosthesis with same

Abstract

The invention discloses a tibial prosthesis and a knee joint prosthesis with the tibial prosthesis. The tibial prosthesis comprises a patellar ligament attachment surface, a lateral collateral ligament attachment surface and a medial collateral ligament attachment surface, and the surface roughness of at least one of the patellar ligament attachment surface, the lateral collateral ligament attachment surface and the medial collateral ligament attachment surface is smaller than or equal to a preset value. The tibia prosthesis has the advantages of being small in friction, low in abrasion, free of inflammatory response and pain, capable of remarkably reducing postoperative pain and discomfort, beneficial to recovery of patients, capable of effectively maintaining stability and functions of knee joints, long in service life and the like.

Description

Technical Field

[0001] The present invention relates to the field of artificial prosthesis replacement, and in particular, to a tibial prosthesis and also to a knee prosthesis having the tibial prosthesis. Background Art

[0002] The main purpose of tumor knee replacement is to remove the tumor tissue in the knee joint while restoring the stability and function of the knee joint. By using an artificial joint to replace the damaged joint part, the patient can regain the ability to perform daily activities such as walking and going up and down stairs.

[0003] Currently, for most tumor knee patients, the common surgical method is to remove the entire knee joint, including the lower end of the femur, the upper end of the tibia, and the patella, and replace it with an artificial joint. In the artificial joint replacement for tumor resection at the tibial end and patella, the connection between the ligament and the tumor tibial prosthesis is a key technology, which will affect the tightness of the patellar ligament and directly affect the patient's postoperative functional activities; at the same time, the attachment of the patellar ligament to the tumor tibial prosthesis will also lead to an increase in the friction between the patellar ligament and the prosthesis, and long-term high friction may cause wear of the patellar ligament, and may even cause ligament inflammation or injury. In the prior art, the contact area between the tumor tibial prosthesis and the patellar ligament mainly contacts the soft tissue and the patellar ligament with rough joint surfaces such as titanium bead sintering, titanium spraying, sandblasting, etc., which also exacerbates the wear of the patellar ligament. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to some extent. For this purpose, the present invention provides a tibial prosthesis and a knee prosthesis having the tibial prosthesis.

[0005] The tibial prosthesis of the present invention includes a patellar ligament attachment surface, a lateral collateral ligament attachment surface, and a medial collateral ligament attachment surface, and the surface roughness of at least one of the patellar ligament attachment surface, the lateral collateral ligament attachment surface, and the medial collateral ligament attachment surface is less than or equal to a preset value.

[0006] The tibial prosthesis of the present invention has the advantages of small friction, low wear, no inflammation reaction and pain, significantly reducing postoperative pain and discomfort, being beneficial to the patient's recovery, effectively maintaining the stability and function of the knee joint, and having a long service life.

[0007] Optionally, the surface roughness of at least one of the patellar ligament attachment surface, the lateral collateral ligament attachment surface, and the medial collateral ligament attachment surface is less than or equal to 0.1 micrometer;

[0008] and / or, the width of the patellar ligament attachment surface is greater than or equal to 20 millimeters and less than or equal to 70 millimeters, and the length of the patellar ligament attachment surface is greater than or equal to 20 millimeters and less than or equal to 150 millimeters;

[0009] And / or, the width of the attachment surface of the lateral collateral ligament is greater than or equal to 10 mm and less than or equal to 60 mm, and the length of the attachment surface of the lateral collateral ligament is greater than or equal to 30 mm and less than or equal to 200 mm;

[0010] And / or, the width of the attachment surface of the medial collateral ligament is greater than or equal to 10 mm and less than or equal to 60 mm, and the length of the attachment surface of the medial collateral ligament is greater than or equal to 30 mm and less than or equal to 200 mm;

[0011] And / or, the coronal plane profile of the attachment surface of the lateral collateral ligament includes a first outer straight segment, an outer curved segment, and a second outer straight segment connected in sequence;

[0012] And / or, the coronal plane profile of the attachment surface of the medial collateral ligament includes a first inner straight segment, an inner curved segment, and a second inner straight segment connected in sequence.

[0013] Optionally, the first outer straight segment extends along a first direction, the second outer straight segment extends along a second direction, and the second direction is perpendicular to the first direction and the medial-lateral direction;

[0014] And / or, the length of the first outer straight segment is greater than or equal to 1 mm and less than or equal to 100 mm, and the length of the second outer straight segment is greater than or equal to 0.5 mm and less than or equal to 100 mm;

[0015] And / or, the outer curved segment includes a first outer arc segment, a second outer arc segment, a third outer arc segment, and a fourth outer arc segment connected in sequence. The first outer arc segment is connected to the first outer straight segment, and the fourth outer arc segment is connected to the second outer straight segment. Wherein, the radius of curvature of the first outer arc segment is greater than or equal to 1 mm and less than or equal to 200 mm, the radius of curvature of the second outer arc segment is greater than or equal to 1 mm and less than or equal to 200 mm, the radius of curvature of the third outer arc segment is greater than or equal to 1 mm and less than or equal to 1000 mm, and the radius of curvature of the fourth outer arc segment is greater than or equal to 1 mm and less than or equal to 200 mm;

[0016] And / or, the first inner straight segment extends along the first direction, and the second inner straight segment extends along the second direction;

[0017] And / or, the length of the first inner straight segment is greater than or equal to 1 mm and less than or equal to 100 mm, and the length of the second inner straight segment is greater than or equal to 0.5 mm and less than or equal to 100 mm;

[0018] And / or, the inner curve segment includes a first inner arc segment, a second inner arc segment, a third inner arc segment, and a fourth inner arc segment that are connected in sequence. The first inner arc segment is connected to the first inner straight segment, and the fourth inner arc segment is connected to the second inner straight segment. Wherein, the radius of curvature of the first inner arc segment is greater than or equal to 1 mm and less than or equal to 200 mm, the radius of curvature of the second inner arc segment is greater than or equal to 1 mm and less than or equal to 200 mm, the radius of curvature of the third inner arc segment is greater than or equal to 1 mm and less than or equal to 1000 mm, and the radius of curvature of the fourth inner arc segment is greater than or equal to 1 mm and less than or equal to 200 mm.

[0019] Optionally, the tibial prosthesis further includes a patellar ligament binding beam and a distal binding adjustment hole. The distal binding adjustment hole is farther from the patella center than the patellar ligament binding beam in a first direction.

[0020] And / or, the tibial prosthesis further includes a patellar ligament binding beam. The distance between the center of the patellar ligament binding beam and the tibial joint line in the first direction is greater than or equal to 10 mm and less than or equal to 50 mm.

[0021] And / or, the tibial prosthesis further includes a patellar ligament binding beam and a proximal binding adjustment hole. The proximal binding adjustment hole is closer to the patella center than the patellar ligament binding beam in the first direction.

[0022] Optionally, an installation groove is provided on the patellar ligament attachment surface, and the patellar ligament binding beam straddles the notch of the installation groove.

[0023] And / or, the distance between the side of the patellar ligament binding beam close to the patella center and the patella center in the first direction is greater than or equal to 20 mm and less than or equal to 100 mm.

[0024] And / or, the distance between the distal binding adjustment hole and the patella center in the first direction is greater than or equal to 30 mm and less than or equal to 200 mm.

[0025] And / or, the distance between the proximal binding adjustment hole and the patella center in the first direction is greater than or equal to 10 mm and less than or equal to 60 mm.

[0026] And / or, the size of the patellar ligament binding beam in the inner-outer direction is greater than or equal to 10 mm and less than or equal to 50 mm.

[0027] And / or, there are multiple distal binding adjustment holes. The multiple distal binding adjustment holes are spaced along the inner-outer direction and are symmetrically arranged in the inner-outer direction.

[0028] And / or, there are a plurality of proximal bundling adjustment holes, and the plurality of proximal bundling adjustment holes are arranged at intervals in the inner-outer direction, and the plurality of proximal bundling adjustment holes are symmetrically arranged in the inner-outer direction;

[0029] And / or, the distance between the side of the patellar ligament bundling beam close to the tibial joint line and the tibial joint line in the first direction is greater than or equal to 5 mm and less than or equal to 40 mm;

[0030] And / or, the distance between the distal bundling adjustment hole and the tibial joint line in the first direction is greater than or equal to 10 mm and less than or equal to 80 mm;

[0031] And / or, the distance between the proximal bundling adjustment hole and the tibial joint line in the first direction is greater than or equal to 1 mm and less than or equal to 30 mm;

[0032] And / or, the diameter of each proximal bundling adjustment hole is greater than or equal to 1 mm and less than or equal to 10 mm.

[0033] Optionally, the tibial prosthesis further includes a plurality of bundling adjustment holes, and the plurality of bundling adjustment holes include: a first outer bundling adjustment hole and a second outer bundling adjustment hole, the first outer bundling adjustment hole and the second outer bundling adjustment hole are located outside the patellar ligament bundling beam and are arranged at intervals in the first direction; and a first inner bundling adjustment hole and a second inner bundling adjustment hole, the first inner bundling adjustment hole and the second inner bundling adjustment hole are located inside the patellar ligament bundling beam and are arranged at intervals in the first direction, the first outer bundling adjustment hole and the first inner bundling adjustment hole are symmetrically arranged in the inner-outer direction, and the second outer bundling adjustment hole and the second inner bundling adjustment hole are symmetrically arranged in the inner-outer direction.

[0034] Optionally, in the first direction, the plurality of bundling adjustment holes are all farther from the patella center relative to the proximal bundling adjustment holes;

[0035] And / or, the distance between the first outer bundling adjustment hole and the first inner bundling adjustment hole and the patella center in the first direction is greater than or equal to 20 mm and less than or equal to 80 mm;

[0036] And / or, the distance between the second outer bundling adjustment hole and the second inner bundling adjustment hole and the patella center in the first direction is greater than or equal to 30 mm and less than or equal to 100 mm;

[0037] And / or, the centers of the second outer bundling adjustment hole and the second inner bundling adjustment hole are farther from the patella center relative to the patellar ligament bundling beam in the first direction;

[0038] And / or, the distances between the first outer bundling adjustment hole and the first inner bundling adjustment hole and the tibial joint line in the first direction are both greater than or equal to 5 mm and less than or equal to 40 mm;

[0039] And / or, the distances between the second outer bundling adjustment hole and the second inner bundling adjustment hole and the tibial joint line in the first direction are both greater than or equal to 7 mm and less than or equal to 60 mm.

[0040] Optionally, the tibial prosthesis further includes a first fibular fixation groove and a second fibular fixation groove, and the first fibular fixation groove and the second fibular fixation groove are symmetrically arranged at intervals in the inner and outer directions.

[0041] Optionally, both the first fibular fixation groove and the second fibular fixation groove are triangular grooves; and / or, the tibial prosthesis further includes a patellar ligament bundling beam, an installation groove is arranged on the patellar ligament attachment surface, the patellar ligament bundling beam spans across the notch of the installation groove, and the first fibular fixation groove and the second fibular fixation groove are symmetrically arranged on both sides of the installation groove in the inner and outer directions.

[0042] Optionally, the tibial prosthesis further includes multiple groups of fibular fixation holes, the multiple groups of fibular fixation holes are arranged at intervals in the first direction, each group of fibular fixation holes includes a medial fibular fixation hole and a lateral fibular fixation hole that are symmetrically arranged in the inner and outer directions, the medial fibular fixation hole and the lateral fibular fixation hole both extend in the inner and outer directions and respectively penetrate through the two side walls of the installation groove, the first fibular fixation groove communicates with the installation groove through the lateral fibular fixation hole, and the second fibular fixation groove communicates with the installation groove through the medial fibular fixation hole.

[0043] The knee joint prosthesis of the present invention includes the tibial prosthesis described in the present invention.

[0044] The knee joint prosthesis of the present invention has the advantages of small friction, low wear, no inflammation reaction and pain, significantly reducing postoperative pain and discomfort, being beneficial to the patient's recovery, good stability, and long service life. Description of the Drawings

[0045] Figure 1 is a schematic diagram of the anatomical position of the patellar ligament on the tibia;

[0046] Figure 2 is a schematic diagram of the length and width of the patellar ligament attachment surface of the tibial prosthesis according to an embodiment of the present invention;

[0047] Figure 3 is the contour line of the patellar ligament attachment surface of the tibial prosthesis according to an embodiment of the present invention in the sagittal plane;

[0048] Figure 4It is a schematic diagram of the anatomical position of the lateral collateral ligament on the tibia;

[0049] Figure 5 It is the contour line of the attachment surface of the lateral collateral ligament of the tibial prosthesis according to an embodiment of the present invention in the coronal plane;

[0050] Figure 6 It is a schematic diagram of the anatomical position of the medial collateral ligament on the tibia;

[0051] Figure 7 It is the contour line of the attachment surface of the medial collateral ligament of the tibial prosthesis according to an embodiment of the present invention in the coronal plane;

[0052] Figure 8 It is a schematic diagram of the structure of the tibial prosthesis according to an embodiment of the present invention;

[0053] Figure 9 It is a schematic diagram of the structure of the tibial prosthesis according to an embodiment of the present invention;

[0054] Figure 10 It is a schematic diagram of the structure of the tibial prosthesis according to an embodiment of the present invention;

[0055] Figure 11 It is a schematic diagram of the structure of the tibial prosthesis according to an embodiment of the present invention;

[0056] Figure 12 It is a schematic diagram of fixing the fibula to the tibial prosthesis according to an embodiment of the present invention;

[0057] Figure 13 It is a schematic diagram of the structure of the knee joint prosthesis according to an embodiment of the present invention;

[0058] Figure 14 It is a schematic diagram of the structure of the knee joint prosthesis according to an embodiment of the present invention;

[0059] Figure 15 It is a schematic diagram of the structure of the knee joint prosthesis according to an embodiment of the present invention;

[0060] Figure 16 It is a schematic diagram of the structure of the knee joint prosthesis according to an embodiment of the present invention. Detailed implementation manners

[0061] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0062] The tibial prosthesis 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings. As Figures 1 - 16As shown, the tibial prosthesis 100 according to the embodiment of the present invention comprises a patellar ligament attachment surface 11, a lateral collateral ligament attachment surface 12 and a medial collateral ligament attachment surface 13. The surface roughness of at least one of the patellar ligament attachment surface 11, the lateral collateral ligament attachment surface 12 and the medial collateral ligament attachment surface 13 is less than or equal to a preset value.

[0063] The tibial prosthesis 100 according to the embodiment of the present invention can make at least one of the patellar ligament attachment surface 11, the lateral collateral ligament attachment surface 12 and the medial collateral ligament attachment surface 13 smoother by making the surface roughness of at least one of the patellar ligament attachment surface 11, the lateral collateral ligament attachment surface 12 and the medial collateral ligament attachment surface 13 less than or equal to a preset value.

[0064] In this way, the friction between the patellar ligament, the lateral collateral ligament and the medial collateral ligament and the tibial prosthesis 100 can be significantly reduced, which not only significantly reduces the inflammatory response and pain caused by wear or friction of the patellar ligament, the lateral collateral ligament and the medial collateral ligament, helps to keep the surgical site clean and hygienic, and significantly reduces postoperative pain and discomfort to promote patient recovery, but also effectively protects the patellar ligament, the lateral collateral ligament and the medial collateral ligament from damage, thereby effectively maintaining the stability and function of the knee joint.

[0065] Since the friction between the corresponding at least one of the patellar ligament, the lateral collateral ligament and the medial collateral ligament and the tibial prosthesis 100 is significantly reduced, the service life of the tibial prosthesis 100 can be greatly extended, so as to effectively reduce the risk of reoperation or revision surgery due to joint wear. In addition, by reducing pain and discomfort, promoting recovery, and extending the service life, the patient's satisfaction with the treatment can be improved, which helps to improve the patient's quality of life and enhance their self-confidence and social ability.

[0066] Therefore, the tibial prosthesis 100 according to the embodiment of the present invention has the advantages of low friction, low wear, no inflammatory response and pain, significantly reducing postoperative pain and discomfort, facilitating patient recovery, effectively maintaining the stability and function of the knee joint, and long service life.

[0067] like Figures 1 - 16 As shown, the tibial prosthesis 100 according to the embodiment of the present invention includes a patellar ligament attachment surface 11 , a lateral collateral ligament attachment surface 12 , and a medial collateral ligament attachment surface 13 .

[0068] The surface roughness of the patellar ligament attachment surface 11 is less than or equal to 0.1 micrometer. Optionally, the patellar ligament attachment surface 11 is subjected to high polishing treatment so that the surface roughness of the patellar ligament attachment surface 11 is less than or equal to 0.1 micrometer.

[0069] The surface roughness of the attachment surface 12 of the lateral collateral ligament is less than or equal to 0.1 micrometer. Optionally, the attachment surface 12 of the lateral collateral ligament is subjected to high polishing so that the surface roughness of the attachment surface 12 of the lateral collateral ligament is less than or equal to 0.1 micrometer.

[0070] The surface roughness of the attachment surface 13 of the medial collateral ligament is less than or equal to 0.1 micrometer. Optionally, the attachment surface 13 of the medial collateral ligament is subjected to high polishing so that the surface roughness of the attachment surface 13 of the medial collateral ligament is less than or equal to 0.1 micrometer.

[0071] Optionally, the patellar ligament contact area is within the range of the attachment surface 11 of the patellar ligament. That is, the edge of the attachment surface 11 of the patellar ligament surrounds (encircles) the patellar ligament contact area. The patellar ligament contact area refers to the area where the tibial prosthesis 100 contacts the patellar ligament when the human body is in a static state.

[0072] During human activities (such as walking, going upstairs, going downstairs, running, etc.), the patellar ligament will move to contact different areas of the tibial prosthesis 100 with the activity behavior. Therefore, by making the patellar ligament contact area within the range of the attachment surface 11 of the patellar ligament, it can further prevent the patellar ligament from being damaged by being cut by the rough surface of the tibial prosthesis 100, and can make the attachment surface 11 of the patellar ligament adapt to different situations of different patients, so as to effectively improve the applicability and application range of the tibial prosthesis 100.

[0073] The patellar ligament is attached to the tibial prosthesis 100. First, find the anatomical position of the patellar ligament on the tibia in the sagittal plane ( Figure 1 ), and determine the width W1' (in most cases greater than or equal to 10 millimeters and less than or equal to 50 millimeters) and length L1' (in most cases greater than or equal to 10 millimeters and less than or equal to 100 millimeters) of the patellar ligament. Then, determine the area and position where the patellar ligament is attached to the tibial prosthesis 100 in the sagittal plane, and draw the contour of the attachment surface 11 of the patellar ligament in the sagittal plane ( Figure 3 ). Finally, perform closed constraint fixation on the contour position, and then perform high polishing on the attachment surface 11 of the patellar ligament so that the surface roughness of the attachment surface 11 of the patellar ligament is less than or equal to 0.1 micrometer. The contour line S1 of the attachment surface 11 of the patellar ligament is as shown in Figure 3 shown.

[0074] Optionally, the width W1 of the patellar ligament attachment surface 11 is greater than or equal to 20 mm and less than or equal to 70 mm, and the length L1 of the patellar ligament attachment surface 11 is greater than or equal to 20 mm and less than or equal to 150 mm. This can further ensure that during human activities, the patellar ligament is always within the range of the patellar ligament attachment surface 11, that is, the patellar ligament is always in contact with the patellar ligament attachment surface 11, thereby further preventing damage to the patellar ligament caused by being cut by the rough surface of the tibial prosthesis 100. Moreover, the patellar ligament attachment surface 11 can be adapted to different situations of different patients, so as to effectively improve the applicability and application range of the tibial prosthesis 100.

[0075] Optionally, the lateral collateral ligament contact area is within the range of the lateral collateral ligament attachment surface 12. That is to say, the edge of the lateral collateral ligament attachment surface 12 surrounds (encircles) the lateral collateral ligament contact area. The lateral collateral ligament contact area refers to the area where the tibial prosthesis 100 contacts the lateral collateral ligament in the static state of the human body.

[0076] During human activities (such as walking, going upstairs, going downstairs, running, etc.), the lateral collateral ligament will move to contact different areas of the tibial prosthesis 100 as the activity behavior occurs. Therefore, by making the lateral collateral ligament contact area within the range of the lateral collateral ligament attachment surface 12, it can further prevent damage to the lateral collateral ligament caused by being cut by the rough surface of the tibial prosthesis 100, and the lateral collateral ligament attachment surface 12 can be adapted to different situations of different patients, so as to effectively improve the applicability and application range of the tibial prosthesis 100.

[0077] The lateral collateral ligament attaches to the upper outer part of the tibial prosthesis 100. First, determine the contact distance of the lateral collateral ligament on the outer side of the tibia in the coronal plane ( Figure 4 ), that is, the distance D1 from the center of the tibia to the lateral collateral ligament and the distance D2 from the horizontal plane of the tibia to the lateral collateral ligament (that is, the distance from the tibial joint line to the distal end of the lateral collateral ligament). In most cases, the distance D1 is greater than or equal to 5 mm and less than or equal to 30 mm, and the distance D2 is greater than or equal to 20 mm and less than or equal to 150 mm.

[0078] Then, establish the area and position where the lateral collateral ligament attaches to the tibial prosthesis 100, and draw the contour line S2 of the lateral collateral ligament attachment surface 12 in the coronal plane ( Figure 5 ). Finally, perform a closed constraint fixation on the position of the lateral collateral ligament attachment surface 12, and then perform a high polishing treatment on the lateral collateral ligament attachment surface 12 so that the surface roughness of the lateral collateral ligament attachment surface 12 is less than or equal to 0.1 μm.

[0079] Optionally, the width W2 of the lateral collateral ligament attachment surface 12 is greater than or equal to 10 mm and less than or equal to 60 mm, and the length L2 of the lateral collateral ligament attachment surface 12 is greater than or equal to 30 mm and less than or equal to 200 mm. The width W2 of the lateral collateral ligament attachment surface 12 is the distance between the center P2 of the tibial medullary cavity and the outer edge of the lateral collateral ligament attachment surface 12.

[0080] Thereby, it can be further ensured that during human activities, the lateral collateral ligament is always within the range of the lateral collateral ligament attachment surface 12, that is, the lateral collateral ligament is always in contact with the lateral collateral ligament attachment surface 12, thereby further preventing the lateral collateral ligament from being damaged by the rough surface of the tibial prosthesis 100. Moreover, the lateral collateral ligament attachment surface 12 can be adapted to different situations of different patients, so as to effectively improve the applicability and application range of the tibial prosthesis 100.

[0081] As Figure 5 shown, the coronal plane contour of the lateral collateral ligament attachment surface 12 includes a first outer straight segment 121, an outer curved segment, and a second outer straight segment 122 that are connected in sequence. Thereby, the shape of the lateral collateral ligament attachment surface 12 and its coronal plane contour can be made more reasonable, and the lateral collateral ligament attachment surface 12 can be adapted to different situations of different patients, so as to effectively improve the applicability and application range of the tibial prosthesis 100.

[0082] Optionally, the first outer straight segment 121 extends along a first direction. The first direction can be the length direction of the lateral collateral ligament attachment surface 12 (medial collateral ligament attachment surface 13, patellar ligament attachment surface 11). The second outer straight segment 122 extends along a second direction, and the second direction is perpendicular to the first direction and the medial-lateral direction. The side away from the mid-sagittal plane is the outside, and the side adjacent to the mid-sagittal plane is the inside, that is, the medial-lateral direction is perpendicular to the mid-sagittal plane. For example, the first direction can be the up-down direction, and the second direction can be the front-back direction. The first direction is as Figure 8 shown by the arrow A in Figure 8 and the medial-lateral direction is as

[0083] shown by the arrow B in

[0084] As Figure 5As shown, the outer curve segment includes a first outer arc segment 123, a second outer arc segment 124, a third outer arc segment 125, and a fourth outer arc segment 126 that are connected in sequence. The first outer arc segment 123 is connected to the first outer straight segment 121, and the fourth outer arc segment 126 is connected to the second outer straight segment 122. This can make the shape of the lateral collateral ligament attachment surface 12 and its coronal plane contour more reasonable, and can enable the lateral collateral ligament attachment surface 12 to adapt to different situations of different patients, so as to effectively improve the applicability and application range of the tibial prosthesis 100.

[0085] Optionally, the radius of curvature of the first outer arc segment 123 is greater than or equal to 1 mm and less than or equal to 200 mm, the radius of curvature of the second outer arc segment 124 is greater than or equal to 1 mm and less than or equal to 200 mm, the radius of curvature of the third outer arc segment 125 is greater than or equal to 1 mm and less than or equal to 1000 mm, and the radius of curvature of the fourth outer arc segment 126 is greater than or equal to 1 mm and less than or equal to 200 mm. This can make the shape of the lateral collateral ligament attachment surface 12 and its coronal plane contour more reasonable, and can enable the lateral collateral ligament attachment surface 12 to adapt to different situations of different patients, so as to effectively improve the applicability and application range of the tibial prosthesis 100.

[0086] Optionally, the medial collateral ligament contact area is located within the range of the medial collateral ligament attachment surface 13. That is to say, the edge of the medial collateral ligament attachment surface 13 surrounds (encircles) the medial collateral ligament contact area. The medial collateral ligament contact area refers to the area where the tibial prosthesis 100 contacts the medial collateral ligament in a static state of the human body.

[0087] During the movement of the human body (such as walking, going upstairs, going downstairs, running, etc.), the medial collateral ligament will move with the movement behavior to contact different areas of the tibial prosthesis 100. Therefore, by making the medial collateral ligament contact area located within the range of the medial collateral ligament attachment surface 13, it can further prevent the medial collateral ligament from being damaged by being cut by the rough surface of the tibial prosthesis 100, and can enable the medial collateral ligament attachment surface 13 to adapt to different situations of different patients, so as to effectively improve the applicability and application range of the tibial prosthesis 100.

[0088] The medial collateral ligament is attached to the upper inner part of the tibial prosthesis 100. First, determine the contact distance of the medial collateral ligament on the medial side of the tibia in the coronal plane ( Figure 6 ), that is, the distance D3 from the tibial center to the medial collateral ligament, and the distance D4 from the tibial horizontal plane to the medial collateral ligament (that is, the distance from the tibial joint line to the distal end of the medial collateral ligament). In most cases, the distance D3 is greater than or equal to 5 mm and less than or equal to 30 mm, and the distance D4 is greater than or equal to 20 mm and less than or equal to 150 mm.

[0089] Then, establish the area and position where the medial collateral ligament attaches to the tibial prosthesis 100, and draw the contour line S3 of the medial collateral ligament attachment surface 13 in the coronal plane ( Figure 7 ). Finally, perform a closed constraint fixation on the position of the medial collateral ligament attachment surface 13, and then perform a high polishing treatment on the medial collateral ligament attachment surface 13 so that the surface roughness of the medial collateral ligament attachment surface 13 is less than or equal to 0.1 micrometer.

[0090] Optionally, the width W3 of the medial collateral ligament attachment surface 13 is greater than or equal to 10 millimeters and less than or equal to 60 millimeters, and the length L3 of the medial collateral ligament attachment surface 13 is greater than or equal to 30 millimeters and less than or equal to 200 millimeters. The width W3 of the medial collateral ligament attachment surface 13 is the distance between the center P2 of the tibial medullary cavity and the inner edge of the medial collateral ligament attachment surface 13.

[0091] Thereby, it can be further ensured that during human activities, the medial collateral ligament is always within the range of the medial collateral ligament attachment surface 13, that is, the medial collateral ligament is always in contact with the medial collateral ligament attachment surface 13, thereby further preventing the medial collateral ligament from being damaged by the rough surface of the tibial prosthesis 100. Moreover, the medial collateral ligament attachment surface 13 can be adapted to different situations of different patients, so as to effectively improve the applicability and application range of the tibial prosthesis 100.

[0092] As Figure 7 shown, the coronal plane contour of the medial collateral ligament attachment surface 13 includes a first inner straight segment 131, an inner curved segment, and a second inner straight segment 132 that are connected in sequence. Thereby, the shape of the medial collateral ligament attachment surface 13 and its coronal plane contour can be made more reasonable, and the medial collateral ligament attachment surface 13 can be adapted to different situations of different patients, so as to effectively improve the applicability and application range of the tibial prosthesis 100.

[0093] Optionally, the first inner straight segment 131 extends along a first direction, and the second inner straight segment 132 extends along a second direction.

[0094] The length L6 of the first inner straight segment 131 is greater than or equal to 1 millimeter and less than or equal to 100 millimeters, and the length L7 of the second inner straight segment 132 is greater than or equal to 0.5 millimeter and less than or equal to 100 millimeters. Thereby, the shape of the medial collateral ligament attachment surface 13 and its coronal plane contour can be made more reasonable, and the medial collateral ligament attachment surface 13 can be adapted to different situations of different patients, so as to effectively improve the applicability and application range of the tibial prosthesis 100.

[0095] As Figure 7As shown, the inner curve segment includes a first inner arc segment 133, a second inner arc segment 134, a third inner arc segment 135, and a fourth inner arc segment 136 that are connected in sequence. The first inner arc segment 133 is connected to the first inner straight segment 131, and the fourth inner arc segment 136 is connected to the second inner straight segment 132. This can make the shape of the medial collateral ligament attachment surface 13 and its coronal plane contour more reasonable, and can enable the medial collateral ligament attachment surface 13 to adapt to different situations of different patients, so as to effectively improve the applicability and application range of the tibial prosthesis 100.

[0096] Optionally, the radius of curvature of the first inner arc segment 133 is greater than or equal to 1 mm and less than or equal to 200 mm, the radius of curvature of the second inner arc segment 134 is greater than or equal to 1 mm and less than or equal to 200 mm, the radius of curvature of the third inner arc segment 135 is greater than or equal to 1 mm and less than or equal to 1000 mm, and the radius of curvature of the fourth inner arc segment 136 is greater than or equal to 1 mm and less than or equal to 200 mm. This can make the shape of the medial collateral ligament attachment surface 13 and its coronal plane contour more reasonable, and can enable the medial collateral ligament attachment surface 13 to adapt to different situations of different patients, so as to effectively improve the applicability and application range of the tibial prosthesis 100.

[0097] As Figure 2 , Figure 3 Figure 5 , Figures 7 - 16 shown, the tibial prosthesis 100 further includes a patellar ligament binding beam 2, and the patellar ligament is bound to the patellar ligament binding beam 2. As Figure 11 shown, the distance D5 between the center of the patellar ligament binding beam 2 and the tibial joint line L in the first direction is greater than or equal to 10 mm and less than or equal to 50 mm.

[0098] This can make the tension of the patellar ligament between 324.294 N and 1682.403522 N, so as to conform to the patellar ligament tension regulations under activities such as walking, going upstairs, going downstairs, and deep squatting, and at knee joint flexion angles of 30 degrees, 60 degrees, 90 degrees, 120 degrees, etc., so as to help maintain knee joint stability, ensure the normal alignment of the knee joint during activities, and support joint mobility.

[0099] The relationship between the tension of the patellar ligament, the distance D5 between the center of the patellar ligament binding beam 2 and the patellar center P1 in the first direction, and the knee joint flexion angle is shown in Table 1.

[0100] Table 1

[0101]

[0102]

[0103] As Figure 2 , Figure 3 , Figure 5, Figures 7 - 16 As shown, the tibial prosthesis 100 further includes a distal tying adjustment hole 31. The distal tying adjustment hole 31 is relatively far from the patella center P1 (tibial joint line L) in the first direction with respect to the patellar ligament tying beam 2. That is to say, the distal tying adjustment hole 31 is relatively far from the proximal end of the patella in the first direction with respect to the patellar ligament tying beam 2.

[0104] When the patient has a high-riding patella, the patellar ligament can be tied in combination with the patellar ligament tying beam 2 and the distal tying adjustment hole 31, so that the patella can be stretched distally to solve the problem of high-riding patella. When the patient has a normal patella, the patellar ligament can be tied with the patellar ligament tying beam 2. Thus, the tibial prosthesis 100 can be used not only for patients with normal patellas but also for patients with high-riding patellas, thereby further improving the applicability and application range of the tibial prosthesis 100.

[0105] As Figure 2 , Figure 3 , Figures 8 - 11 As shown, there are multiple distal tying adjustment holes 31, and the multiple distal tying adjustment holes 31 are arranged at intervals in the medial-lateral direction and are symmetrically arranged in the medial-lateral direction. That is to say, the distances between the multiple distal tying adjustment holes 31 and the patella center P1 (tibial joint line L) in the first direction are equal to each other. Thus, the structure of the tibial prosthesis 100 can be made more reasonable, and the patella can be stretched distally more effectively, thereby better solving the problem of high-riding patella.

[0106] Optionally, the distance D6 between the side of the patellar ligament tying beam 2 close to the tibial joint line L and the tibial joint line L in the first direction is greater than or equal to 5 mm and less than or equal to 40 mm. The upper plane of the tibial prosthesis 100 serves as the reference plane after osteotomy, and the tibial joint line is located on the upper plane of the tibial prosthesis 100. By controlling the distance D6, the position of the patellar ligament tying beam 2 on the tibial prosthesis 100 can be controlled more precisely, and then the position of the patellar ligament tied on the tibial prosthesis 100 can be precisely controlled to precisely limit the position of the patellar ligament on the tibial prosthesis 100.

[0107] The distance D7 between the distal tying adjustment hole 31 and the tibial joint line L in the first direction is greater than or equal to 10 mm and less than or equal to 80 mm. Thus, the patella can be stretched distally more effectively, thereby better solving the problem of high-riding patella.

[0108] Optionally, as Figure 10 shown, the distance D12 between the side of the patellar ligament tying beam 2 close to the patella center P1 and the patella center P1 in the first direction is greater than or equal to 20 mm and less than or equal to 100 mm. Thus, the patellar ligament can be better tied to the patellar ligament tying beam 2, and the patella can be more precisely restricted to prevent the patella from moving randomly.

[0109] As Figure 10 shown, the distance D9 between the distal bundling adjustment hole 31 and the patella center P1 in the first direction is greater than or equal to 30 mm and less than or equal to 200 mm. Thus, the patella can be stretched distally more effectively, thereby better solving the problem of high-riding patella.

[0110] Optionally, as Figure 11 shown, the dimension D11 of the patellar ligament bundling beam 2 in the medial-lateral direction is greater than or equal to 10 mm and less than or equal to 50 mm. Thus, there is enough space for the patellar ligament bundling beam 2 to bundle the patellar ligament.

[0111] As Figure 2 、 Figure 3 、 Figure 5 、 Figures 7 - 16 shown, the tibial prosthesis 100 further includes a proximal bundling adjustment hole 32. The proximal bundling adjustment hole 32 is adjacent to the patella center (tibial joint line L) relative to the patellar ligament bundling beam 2 in the first direction. That is to say, the proximal bundling adjustment hole 32 is adjacent to the proximal end of the patella relative to the patellar ligament bundling beam 2 in the first direction.

[0112] When the patient's patella is a low-riding patella, the patellar ligament can be bundled in combination with the patellar ligament bundling beam 2 and the proximal bundling adjustment hole 32, so that the patella can be stretched proximally to solve the problem of low-riding patella. When the patient's patella is a normal patella, the patellar ligament can be bundled with the patellar ligament bundling beam 2. Thus, the tibial prosthesis 100 can be used not only for patients with normal patellae but also for patients with low-riding patellae, thereby further improving the applicability and application range of the tibial prosthesis 100.

[0113] As Figure 2 、 Figure 3 、 Figures 8 - 11 shown, there are multiple proximal bundling adjustment holes 32, and the multiple proximal bundling adjustment holes 32 are arranged at intervals in the medial-lateral direction and are symmetrically arranged in the medial-lateral direction. That is to say, the distances between the multiple proximal bundling adjustment holes 32 and the patella center P1 (tibial joint line L) in the first direction are equal to each other. Thus, the structure of the tibial prosthesis 100 can be made more reasonable, and the patella can be stretched distally more effectively, thereby better solving the problem of high-riding patella.

[0114] Optionally, as Figure 10 shown, the distance D10 between the proximal bundling adjustment hole 32 and the patella center P1 in the first direction is greater than or equal to 10 mm and less than or equal to 60 mm. Thus, the patella can be stretched proximally more effectively, thereby better solving the problem of low-riding patella.

[0115] Optionally, as Figure 9As shown, the distance D16 between the proximal bundling adjustment hole 32 and the tibial joint line L in the first direction is greater than or equal to 1 mm and less than or equal to 30 mm. Thus, the patella can be stretched more effectively proximally, thereby better solving the problem of low-lying patella.

[0116] Optionally, as Figure 8 shown, the patellar ligament attachment surface 11 is provided with a placement groove 14, and the patellar ligament bundling beam 2 straddles the notch of the placement groove 14. It can be understood that by providing the placement groove 14, the tibial tubercle can be placed to connect the bone block freed from the patellar tendon insertion point, providing support for the bone block connected to the patellar ligament, and ensuring that the patellar ligament can be completely implanted on the tibial prosthesis 100. At the same time, in this embodiment, the patellar ligament bundling beam 2 and the tibial prosthesis 100 are integrally provided, further avoiding the loosening of the patellar ligament bundling beam 2 under the long-term stretching drive of the ligament.

[0117] Specifically, the surface roughness inside the placement groove 14 is the same as that of the patellar ligament attachment surface 11, thereby further reducing wear.

[0118] As Figure 2 、 Figure 3 、 Figures 8 - 11 shown, the tibial prosthesis 100 further includes a plurality of bundling adjustment holes, and the plurality of bundling adjustment holes include a first outer bundling adjustment hole 41, a second outer bundling adjustment hole 42, a first inner bundling adjustment hole 43, and a second inner bundling adjustment hole 44.

[0119] The first outer bundling adjustment hole 41 and the second outer bundling adjustment hole 42 are located outside the patellar ligament bundling beam 2, and the first outer bundling adjustment hole 41 and the second outer bundling adjustment hole 42 are arranged at intervals in the first direction. The first inner bundling adjustment hole 43 and the second inner bundling adjustment hole 44 are located inside the patellar ligament bundling beam 2, and the first inner bundling adjustment hole 43 and the second inner bundling adjustment hole 44 are arranged at intervals in the first direction. The first outer bundling adjustment hole 41 and the first inner bundling adjustment hole 43 are symmetrically arranged in the inner and outer directions, and the second outer bundling adjustment hole 42 and the second inner bundling adjustment hole 44 are symmetrically arranged in the inner and outer directions.

[0120] Since the patellar ligament is reconstructed and the installation position of the patellar ligament has changed, which is equivalent to a change in the positioning reference, this will cause the patella center not to be in the ideal position, resulting in the problem of the patellar ligament being tight outside and loose inside or loose outside and tight inside. In the related art, the tightness of the patellar ligament is solved by excising the surrounding soft tissues or changing the thickness of the patella, but this will cause secondary trauma to the human body.

[0121] By setting the first outer bundling adjustment hole 41, the second outer bundling adjustment hole 42, the first inner bundling adjustment hole 43 and the second inner bundling adjustment hole 44, the problem of adjusting the tightness of the connection between the patellar ligament and the tibial prosthesis 100 can be solved, thereby reducing the wear pain caused by uneven force on the patellar ligament. Moreover, it will not damage the native soft tissue, nor reduce the bone mass of the patella, and will not cause secondary trauma to the human body.

[0122] Thereby, the risk of abnormal patellar movement and dislocation caused by inappropriate bundling of the patellar ligament is reduced, which helps to restore the normal functions of the knee joint (including flexion and extension activities and load-bearing capacity), so as to improve the quality of life of the patient and help the patient return to normal life and work faster. Moreover, by precisely controlling the bundling position and tension of the patellar ligament, the incidence of postoperative complications such as infection, pain, and stiffness can be reduced.

[0123] Specifically, when the medial side of the patellar ligament is under greater force and the lateral side is under less force (tight inside and loose outside), the patellar ligament can be bundled in combination with the patellar ligament bundling beam 2 and the proximal bundling adjustment hole 32 (distal bundling adjustment hole 31), and at least one of the first outer bundling adjustment hole 41 and the second outer bundling adjustment hole 42 is added to bundle with the patellar ligament. Thereby, the pulling force applied to the patellar ligament towards the outside can be increased, and the pulling force applied to the patellar ligament towards the inside can be reduced.

[0124] When the medial side of the patellar ligament is under less force and the lateral side is under greater force (loose inside and tight outside), the patellar ligament can be bundled in combination with the patellar ligament bundling beam 2 and the proximal bundling adjustment hole 32 (distal bundling adjustment hole 31), and at least one of the first inner bundling adjustment hole 43 and the second inner bundling adjustment hole 44 is added to bundle with the patellar ligament. Thereby, the pulling force applied to the patellar ligament towards the inside can be increased, and the pulling force applied to the patellar ligament towards the outside can be reduced.

[0125] For example, when the tibial prosthesis 100 is installed on the left tibia, the first outer bundling adjustment hole 41 and the second outer bundling adjustment hole 42 are located on the left side of the first inner bundling adjustment hole 43 and the second inner bundling adjustment hole 44; when the tibial prosthesis 100 is installed on the right tibia, the first outer bundling adjustment hole 41 and the second outer bundling adjustment hole 42 are located on the right side of the first inner bundling adjustment hole 43 and the second inner bundling adjustment hole 44. Figure 2 、 Figure 3 、 Figure 5 、 Figures 7 - 16 The tibial prosthesis 100 shown can be installed on the right tibia.

[0126] Optionally, a plurality of bundling adjustment holes are all away from the patella center P1 in the first direction relative to the proximal bundling adjustment hole 32. That is to say, the first outer bundling adjustment hole 41, the second outer bundling adjustment hole 42, the first inner bundling adjustment hole 43 and the second inner bundling adjustment hole 44 are all away from the patella center P1 in the first direction relative to the proximal bundling adjustment hole 32. Thus, the problem of adjusting the tightness of the connection between the patellar ligament and the tibial prosthesis 100 can be better solved, thereby further reducing the wear pain caused by uneven force on the patellar ligament.

[0127] As Figure 2 , Figure 3 , Figures 8 - 11 shown, the first outer bundling adjustment hole 41 is opposite to the patellar ligament bundling beam 2 in the inner-outer direction, and the first inner bundling adjustment hole 43 is opposite to the patellar ligament bundling beam 2 in the inner-outer direction. That is to say, the distances of the first outer bundling adjustment hole 41, the first inner bundling adjustment hole 43 and the patellar ligament bundling beam 2 from the patella center P1 (tibial joint line L) in the first direction are substantially equal to each other.

[0128] Thus, the problem of adjusting the tightness of the connection between the patellar ligament and the tibial prosthesis 100 can be better solved, thereby further reducing the wear pain caused by uneven force on the patellar ligament.

[0129] Optionally, the center of the second outer bundling adjustment hole 42 is away from the patella center P1 (tibial joint line L) in the first direction relative to the patellar ligament bundling beam 2, and the center of the second inner bundling adjustment hole 44 is away from the patella center P1 (tibial joint line L) in the first direction relative to the patellar ligament bundling beam 2.

[0130] Thus, the problem of adjusting the tightness of the connection between the patellar ligament and the tibial prosthesis 100 can be better solved, thereby further reducing the wear pain caused by uneven force on the patellar ligament.

[0131] Optionally, the diameter of each proximal bundling adjustment hole is greater than or equal to 1 mm and less than or equal to 10 mm. In this embodiment, the diameters of the first outer bundling adjustment hole 41, the second outer bundling adjustment hole 42, the first inner bundling adjustment hole 43 and the second inner bundling adjustment hole 44 are also all greater than or equal to 1 mm and less than or equal to 10 mm. Thus, the patellar ligament can be more easily bundled to the bundling adjustment holes.

[0132] As Figure 10 shown, the distance D12 between the first outer bundling adjustment hole 41 and the patella center P1 in the first direction is greater than or equal to 20 mm and less than or equal to 80 mm, and the distance D13 between the first inner bundling adjustment hole 43 and the patella center P1 in the first direction is greater than or equal to 20 mm and less than or equal to 80 mm. Thus, the problem of adjusting the tightness of the connection between the patellar ligament and the tibial prosthesis 100 can be better solved, thereby further reducing the wear pain caused by uneven force on the patellar ligament.

[0133] As Figure 10 shown, the distance D14 between the second outer binding adjustment hole 42 and the patella center P1 in the first direction is greater than or equal to 30 mm and less than or equal to 100 mm, and the distance D15 between the second inner binding adjustment hole 44 and the patella center P1 in the first direction is greater than or equal to 30 mm and less than or equal to 100 mm. Thus, the problem of adjusting the tightness of the connection between the patellar ligament and the tibial prosthesis 100 can be better solved, thereby further reducing the wear pain caused by uneven stress on the patellar ligament.

[0134] As Figure 9 shown, the distance D18 between the first outer binding adjustment hole 41 and the tibial joint line L in the first direction is greater than or equal to 5 mm and less than or equal to 40 mm, and the distance D19 between the first inner binding adjustment hole 43 and the tibial joint line L in the first direction is greater than or equal to 5 mm and less than or equal to 40 mm. Thus, the problem of adjusting the tightness of the connection between the patellar ligament and the tibial prosthesis 100 can be better solved, thereby further reducing the wear pain caused by uneven stress on the patellar ligament.

[0135] As Figure 9 shown, the distance D20 between the second outer binding adjustment hole 42 and the tibial joint line L in the first direction is greater than or equal to 7 mm and less than or equal to 60 mm, and the distance D21 between the second inner binding adjustment hole 44 and the tibial joint line L in the first direction is greater than or equal to 7 mm and less than or equal to 60 mm. Thus, the problem of adjusting the tightness of the connection between the patellar ligament and the tibial prosthesis 100 can be better solved, thereby further reducing the wear pain caused by uneven stress on the patellar ligament.

[0136] As Figure 2 、 Figure 3 、 Figure 5 、 Figures 7 - 16 shown, the tibial prosthesis 100 further includes a first fibula fixing groove 51 and a second fibula fixing groove 52, and the first fibula fixing groove 51 and the second fibula fixing groove 52 are symmetrically arranged at intervals in the inner-outer direction.

[0137] When the tibial prosthesis 100 is installed on the left tibia, the fibula 200 can be installed in one of the first fibula fixing groove 51 and the second fibula fixing groove 52; when the tibial prosthesis 100 is installed on the right tibia, the fibula 200 can be installed in the other of the first fibula fixing groove 51 and the second fibula fixing groove 52. Figure 2 、 Figure 3 、 Figure 5 、 Figures 7 - 16 shown, the tibial prosthesis 100 can be installed on the right tibia, and the fibula 200 can be installed in the first fibula fixing groove 51.

[0138] By setting the first fibula fixing groove 51 and the second fibula fixing groove 52, it is beneficial for the fibula 200 to be tightly combined with the tibial prosthesis 100, thereby not only increasing the stability of the tibial prosthesis 100, but also helping to reduce the risk of loosening and subsidence of the tibial prosthesis 100 after surgery. Moreover, by setting the first fibula fixing groove 51 and the second fibula fixing groove 52, the tibial prosthesis 100 can be installed on the left tibia of the patient or on the right tibia of the patient, thereby further improving the applicability and application range of the tibial prosthesis 100.

[0139] Moreover, by setting the first fibula fixing groove 51 and the second fibula fixing groove 52, the contact area between the fibula 200 and the tibial prosthesis 100 can also be increased, which is beneficial to bone integration and helps with the long-term fixation and functional recovery of the tibial prosthesis 100. As time goes by, bone tissue will grow into the first fibula fixing groove 51 and the second fibula fixing groove 52, further strengthening the connection between the fibula 200 and the tibial prosthesis 100, thereby improving the long-term stability of the tibial prosthesis 100.

[0140] The fibula 200, as one of the main stabilizing structures on the lateral side of the knee joint, its fixation helps to maintain the overall stability of the knee joint, especially during weight-bearing and activities. As Figure 12 shown, during weight-bearing activities, the upper end of the fibular head contacts the upper end surface 511 (upper end surface 521) of the first fibula fixing groove 51 (second fibula fixing groove 52), and the upper end surface 511 (upper end surface 521) of the first fibula fixing groove 51 (second fibula fixing groove 52) provides weight-bearing.

[0141] Optionally, the first fibula fixing groove 51 is a triangular groove, and the second fibula fixing groove 52 is a triangular groove. This can enable the first fibula fixing groove 51 and the second fibula fixing groove 52 to have excellent stability and stress conduction ability, so that the fibula 200 and the tibial prosthesis 100 are more tightly combined, in order to further increase the stability of the tibial prosthesis 100 and further reduce the risk of loosening and subsidence of the tibial prosthesis 100 after surgery. The first fibula fixing groove 51 and the second fibula fixing groove 52 are below the osteotomy surface of the tibial prosthesis 100.

[0142] Moreover, by making the first fibula fixing groove 51 and the second fibula fixing groove 52 triangular grooves, it is also easier to position and fix the fibula 200 during the operation, so that the position and angle of the fibula 200 can be controlled more precisely, reducing the operation time and ensuring the success of the operation.

[0143] Optionally, the first fibula fixing groove 51 and the second fibula fixing groove 52 are symmetrically arranged on both sides of the placement groove 14 in the inner-outer direction. This can better fix the fibula 200.

[0144] As Figure 7 and Figure 8As shown, the tibial prosthesis 100 further includes multiple groups of fibula fixing holes 6, and the multiple groups of fibula fixing holes 6 are arranged at intervals in the first direction. Each group of fibula fixing holes 6 includes a medial fibula fixing hole 61 and a lateral fibula fixing hole 62 that are symmetrically arranged in the inner-outer direction.

[0145] Both the medial fibula fixing hole 61 and the lateral fibula fixing hole 62 extend in the inner-outer direction, and the medial fibula fixing hole 61 and the lateral fibula fixing hole 62 respectively penetrate through the two side walls 141 of the placement groove 14. The first fibula fixing groove 51 communicates with the placement groove 14 through the lateral fibula fixing hole 62, and the second fibula fixing groove 52 communicates with the placement groove 14 through the medial fibula fixing hole 61. Thus, not only can the fibula 200 be fixed more firmly, but also the stress can be more evenly distributed between the tibial prosthesis 100 and the bone (tibia), which helps to reduce the risk of stress concentration and fracture.

[0146] In this embodiment, the proximal bundling adjustment hole 32, the first outer bundling adjustment hole 41, the second outer bundling adjustment hole 42, the first inner bundling adjustment hole 43, and the second inner bundling adjustment hole 44 are all located in the fibula fixing groove. Therefore, in addition to being used for bundling ligaments, the above adjustment holes can also be used to bundle the fibula 200 for fibula fixation.

[0147] After the fibula 200 is installed into the first fibula fixing groove 51, at least a part of the fibula 200 is bundled and fixed with the proximal bundling adjustment hole 32, the first outer bundling adjustment hole 41, the second outer bundling adjustment hole 42, and the lateral fibula fixing hole 62 according to the intraoperative situation. Thus, the stress can be more evenly distributed between the tibial prosthesis 100 and the bone (tibia), which helps to reduce the risk of stress concentration and fracture.

[0148] Specifically, after the fibula 200 is installed into the second fibula fixing groove 52, at least a part of the fibula 200 is bundled and fixed with the proximal bundling adjustment hole 32, the first inner bundling adjustment hole 43, the second inner bundling adjustment hole 44, and the medial fibula fixing hole 61 according to the intraoperative situation. Thus, the stress can be more evenly distributed between the tibial prosthesis 100 and the bone (tibia), which helps to reduce the risk of stress concentration and fracture.

[0149] Moreover, through the multiple fibula fixing holes 6, it not only provides convenience for bundling and fixing the fibula 200 during the operation, but also can better adapt to the bone morphologies of different patients. The triangular first fibula fixing groove 51 has strong inclusiveness. Doctors can select at least one appropriate fixing hole for bundling and fixing according to factors such as the patient's bone morphology, tumor location and size, etc., to ensure the best surgical effect and patient comfort. Whether it is the patient's own fibula or an artificial replacement fibula, it can be embedded into the first fibula fixing groove 51 for fixation.

[0150] In addition, multiple fixing holes also provide more space and channels for the growth and creeping substitution of bone tissue.

[0151] In this embodiment, the triangular groove design enables the tibial prosthesis 100 to better adapt to the anatomical structure of the patient. The doctor can adjust the position of the fibula 200 in the first fibula fixing groove 51 (the second fibula fixing groove 52) according to the specific conditions of the patient to achieve the best stability and functional recovery effect. In particular, the fibula 200 can be embedded into the first fibula fixing groove 51 (the second fibula fixing groove 52) according to the size of the fibula 200, and then the fibula 200 is bundled by multiple fixing holes (multiple fixing holes).

[0152] The triangular groove design plus the surrounding porous bundling and fixing structure simplifies the surgical operation process. The doctor can more easily fix the fibula 200 in the first fibula fixing groove 51 (the second fibula fixing groove 52) without performing complex additional fixing steps, thereby shortening the operation time and reducing the surgical risk.

[0153] Optionally, both the fibula fixing hole 6 and the adjustment hole in the fibula fixing groove can be in a threaded shape so that the fibula 200 can be fixed to the tibial prosthesis 100 by screwing through the fixing hole (adjustment hole).

[0154] The present invention also discloses a knee joint prosthesis 1000. The knee joint prosthesis 1000 includes a tibial prosthesis 100.

[0155] Correspondingly, the knee joint prosthesis 1000 of the present invention has the advantages of small friction, low wear, no inflammation reaction and pain, significantly reducing postoperative pain and discomfort, being beneficial to the patient's recovery, good stability, long service life, etc.

[0156] In the description of the present invention, the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0157] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0158] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0159] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0160] In the present invention, terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0161] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A tibial prosthesis, characterized in that: The tibial prosthesis includes a patellar ligament attachment surface, a lateral collateral ligament attachment surface and a medial collateral ligament attachment surface, and the surface roughness of at least one of the patellar ligament attachment surface, the lateral collateral ligament attachment surface and the medial collateral ligament attachment surface is less than or equal to a preset value.

2. The tibial prosthesis according to claim 1, characterized in that: The surface roughness of at least one of the patellar ligament attachment surface, the lateral collateral ligament attachment surface, and the medial collateral ligament attachment surface is less than or equal to 0.1 micrometer; And / or, the width of the patellar ligament attachment surface is greater than or equal to 20 mm and less than or equal to 70 mm, and the length of the patellar ligament attachment surface is greater than or equal to 20 mm and less than or equal to 150 mm; and / or, the width of the lateral collateral ligament attachment surface is greater than or equal to 10 mm and less than or equal to 60 mm, and the length of the lateral collateral ligament attachment surface is greater than or equal to 30 mm and less than or equal to 200 mm; and / or, the width of the medial collateral ligament attachment surface is greater than or equal to 10 mm and less than or equal to 60 mm, and the length of the medial collateral ligament attachment surface is greater than or equal to 30 mm and less than or equal to 200 mm; and / or, the coronal profile of the attachment surface of the lateral collateral ligament comprises a first outer straight segment, an outer curved segment and a second outer straight segment connected in sequence; And / or, the coronal plane contour of the medial collateral ligament attachment surface includes a first inner straight line segment, an inner curved line segment and a second inner straight line segment connected in sequence.

3. The tibial prosthesis according to claim 2, characterized in that: The first outer straight line segment extends along a first direction, and the second outer straight line segment extends along a second direction, wherein the second direction is perpendicular to the first direction and the inner-outer direction; and / or, the length of the first outer straight line segment is greater than or equal to 1 mm and less than or equal to 100 mm, and the length of the second outer straight line segment is greater than or equal to 0.5 mm and less than or equal to 100 mm; And / or, the outer curved segment includes a first outer arc segment, a second outer arc segment, a third outer arc segment and a fourth outer arc segment which are sequentially connected, the first outer arc segment is connected to the first outer straight line segment, the fourth outer arc segment is connected to the second outer straight line segment, wherein the radius of curvature of the first outer arc segment is greater than or equal to 1 mm and less than or equal to 200 mm, the radius of curvature of the second outer arc segment is greater than or equal to 1 mm and less than or equal to 200 mm, the radius of curvature of the third outer arc segment is greater than or equal to 1 mm and less than or equal to 1000 mm, and the radius of curvature of the fourth outer arc segment is greater than or equal to 1 mm and less than or equal to 200 mm; And / or, the first inner straight line segment extends along a first direction, and the second inner straight line segment extends along the second direction; And / or, the length of the first inner straight line segment is greater than or equal to 1 mm and less than or equal to 100 mm, and the length of the second inner straight line segment is greater than or equal to 0.5 mm and less than or equal to 100 mm; And / or, the inner curved line segment includes a first inner arc segment, a second inner arc segment, a third inner arc segment and a fourth inner arc segment which are connected in sequence, the first inner arc segment is connected to the first inner straight line segment, the fourth inner arc segment is connected to the second inner straight line segment, wherein the radius of curvature of the first inner arc segment is greater than or equal to 1 mm and less than or equal to 200 mm, the radius of curvature of the second inner arc segment is greater than or equal to 1 mm and less than or equal to 200 mm, the radius of curvature of the third inner arc segment is greater than or equal to 1 mm and less than or equal to 1000 mm, and the radius of curvature of the fourth inner arc segment is greater than or equal to 1 mm and less than or equal to 200 mm.

4. The tibial prosthesis according to claim 1, characterized in that: The tibial prosthesis further comprises a patellar ligament binding beam and a distal binding adjustment hole, wherein the distal binding adjustment hole is located away from the patellar center relative to the patellar ligament binding beam in a first direction; And / or, the tibial prosthesis further comprises a patellar ligament binding beam, and the distance between the center of the patellar ligament binding beam and the tibial joint line in the first direction is greater than or equal to 10 mm and less than or equal to 50 mm; And / or, the tibial prosthesis further comprises a patellar ligament binding beam and a proximal binding adjustment hole, wherein the proximal binding adjustment hole is adjacent to the center of the patella relative to the patellar ligament binding beam in a first direction.

5. The tibial prosthesis according to claim 4, characterized in that: The patellar ligament attachment surface is provided with a placement groove, and the patellar ligament binding beam spans the notch of the placement groove; And / or, the distance between the side of the patellar ligament binding beam close to the patellar center and the patellar center in the first direction is greater than or equal to 20 mm and less than or equal to 100 mm; And / or, the distance between the distal binding adjustment hole and the center of the patella in the first direction is greater than or equal to 30 mm and less than or equal to 200 mm; And / or, the distance between the proximal binding adjustment hole and the center of the patella in the first direction is greater than or equal to 10 mm and less than or equal to 60 mm; And / or, the dimension of the patellar ligament binding beam in the inner and outer directions is greater than or equal to 10 mm and less than or equal to 50 mm; And / or, there are a plurality of distal binding adjustment holes, the plurality of distal binding adjustment holes are arranged at intervals along the inner and outer directions, and the plurality of distal binding adjustment holes are symmetrically arranged in the inner and outer directions; And / or, there are a plurality of proximal binding adjustment holes, the plurality of proximal binding adjustment holes are arranged at intervals along the inner-outer direction, and the plurality of proximal binding adjustment holes are symmetrically arranged in the inner-outer direction; And / or, the distance between the side of the patellar ligament binding beam close to the tibial joint line and the tibial joint line in the first direction is greater than or equal to 5 mm and less than or equal to 40 mm; and / or, the distance between the distal binding adjustment hole and the tibial joint line in the first direction is greater than or equal to 10 mm and less than or equal to 80 mm; and / or, the distance between the proximal binding adjustment hole and the tibial joint line in the first direction is greater than or equal to 1 mm and less than or equal to 30 mm; And / or, the diameter of each of the proximal binding adjustment holes is greater than or equal to 1 mm and less than or equal to 10 mm.

6. The tibial prosthesis according to claim 4, characterized in that: It also includes a plurality of binding adjustment holes, wherein the plurality of binding adjustment holes include: a first external binding adjustment hole and a second external binding adjustment hole, wherein the first external binding adjustment hole and the second external binding adjustment hole are located outside the patellar ligament binding beam and are arranged at intervals along the first direction; and A first inner binding adjustment hole and a second inner binding adjustment hole, wherein the first inner binding adjustment hole and the second inner binding adjustment hole are located on the inner side of the patellar ligament binding beam and are arranged at intervals along the first direction, the first outer binding adjustment hole and the first inner binding adjustment hole are symmetrically arranged along the inner-outer direction, and the second outer binding adjustment hole and the second inner binding adjustment hole are symmetrically arranged along the inner-outer direction.

7. The tibial prosthesis according to claim 6, characterized in that: The plurality of binding adjustment holes are all far away from the patella center relative to the proximal binding adjustment hole in the first direction; And / or, the distance between the first outer binding adjustment hole and the first inner binding adjustment hole and the center of the patella in the first direction is greater than or equal to 20 mm and less than or equal to 80 mm; And / or, the distance between the second outer binding adjustment hole and the second inner binding adjustment hole and the center of the patella in the first direction is greater than or equal to 30 mm and less than or equal to 100 mm; And / or, the centers of the second outer binding adjustment hole and the second inner binding adjustment hole are away from the center of the patella relative to the patellar ligament binding beam in the first direction; And / or, the distances between the first external binding adjustment hole and the first internal binding adjustment hole and the tibial joint line in the first direction are both greater than or equal to 5 mm and less than or equal to 40 mm; And / or, the distances between the second external binding adjustment hole and the second internal binding adjustment hole and the tibial joint line in the first direction are both greater than or equal to 7 mm and less than or equal to 60 mm.

8. The tibial prosthesis according to claim 1, characterized in that: The tibial prosthesis further comprises a first fibula fixing slot and a second fibula fixing slot, wherein the first fibula fixing slot and the second fibula fixing slot are symmetrically arranged in an inner-outer direction.

9. The tibial prosthesis according to claim 8, characterized in that: The first fibula fixation groove and the second fibula fixation groove are both triangular grooves; And / or, the tibial prosthesis also includes a patellar ligament binding beam, the patellar ligament attachment surface is provided with a placement groove, the patellar ligament binding beam spans the slot of the placement groove, and the first fibula fixation groove and the second fibula fixation groove are symmetrically arranged on both sides of the placement groove along the inner and outer directions.

10. The tibial prosthesis according to claim 9, characterized in that: The tibial prosthesis also includes multiple groups of fibula fixation holes, which are arranged at intervals along the first direction, and each group of fibula fixation holes includes a medial fibula fixation hole and a lateral fibula fixation hole symmetrically arranged along the medial-lateral direction. The medial fibula fixation hole and the lateral fibula fixation hole both extend along the medial-lateral direction and respectively pass through two side walls of the placement groove, the first fibula fixation groove is connected to the placement groove through the lateral fibula fixation hole, and the second fibula fixation groove is connected to the placement groove through the medial fibula fixation hole.

11. A knee joint prosthesis, characterized in that: Comprising a tibial prosthesis according to any one of claims 1-10.

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