CN113367854B - Tibial tray prosthesis and knee joint prosthesis - Google Patents
Tibial tray prosthesis and knee joint prosthesis Download PDFInfo
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- CN113367854B CN113367854B CN202110566321.8A CN202110566321A CN113367854B CN 113367854 B CN113367854 B CN 113367854B CN 202110566321 A CN202110566321 A CN 202110566321A CN 113367854 B CN113367854 B CN 113367854B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/389—Tibial components
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30721—Accessories
- A61F2/30749—Fixation appliances for connecting prostheses to the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2002/30934—Special articulating surfaces
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Cardiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Physical Education & Sports Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a tibial tray prosthesis and a knee joint prosthesis, which comprise a tibial tray body and a connecting piece, wherein the connecting piece is used for connecting tibia, the connecting piece is arranged at the lower end of the tibial tray body, a limiting part is arranged on the connecting piece, and an included angle alpha is formed between at least part of the length direction of the limiting part and the length direction of the connecting piece, wherein alpha is more than 0 degrees and less than 90 degrees. The tibial tray prosthesis is difficult to loosen after being installed and has good stability.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a tibial tray prosthesis and a knee joint prosthesis.
Background
The artificial unicondylar knee joint prosthesis is adopted for replacing diseased joint cartilage and meniscus and normal joint ligaments and other tissues are reserved in the unicondylar knee joint replacement operation, so that the unicondylar knee joint replacement operation has the advantages of small trauma, quick recovery, reduced pain, more natural movement range and the like, and is widely applied to knee joint treatment.
In the related art, unicondylar knee prostheses generally include a unicondylar femoral prosthesis coupled to a femur and a tibial tray prosthesis coupled to a tibia. But the tibial tray prosthesis is easy to loose after being connected with the tibia, and has poor stability.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the embodiment of the invention provides the tibial tray prosthesis which is not easy to loosen after being installed and has good stability.
The embodiment of the invention also provides a knee joint prosthesis.
In a first aspect, a tibial tray prosthesis according to an embodiment of the invention includes: the tibia support comprises a tibia support body and a connecting piece, wherein the connecting piece is used for connecting tibia, the connecting piece is arranged at the lower end of the tibia support body, a limiting part is arranged on the connecting piece, and an included angle alpha is formed between at least part of the length direction of the limiting part and the length direction of the connecting piece, wherein the included angle alpha is more than 0 degrees and less than 90 degrees.
According to the tibial tray prosthesis provided by the embodiment of the invention, the limiting part is arranged on the connecting piece, so that after the connecting piece is connected with the tibia through bone cement, the contact area between the connecting piece and the tibia is increased through the limiting part, the stability of the tibial tray prosthesis and the tibia after installation is improved, the value range of the included angle alpha between the length direction of the limiting part and the length direction of the connecting piece is 0 degrees less than alpha less than 90 degrees, and when the tibial tray prosthesis is subjected to thrust in the front-back direction or the up-down direction, the interaction between the bone cement shell and the limiting part with a certain included angle and the bone cement can further limit the tibial movement of the tibial tray prosthesis, so that the tibial tray prosthesis after installation is not easy to loosen and has good stability.
In some embodiments, the limiting portions are provided on both sides of the connecting member in the thickness direction, respectively.
In some embodiments, the limit portion includes a plurality of concave-convex portions, wherein at least two of the concave-convex portions are arranged along a depth direction of the connection member.
In some embodiments, the limiting portion includes a first concave-convex portion and a second concave-convex portion, the first concave-convex portion and the second concave-convex portion are arranged along a depth direction of the connecting piece, and an included angle beta is formed between a length direction of the first concave-convex portion and a length direction of the second concave-convex portion, wherein beta is more than or equal to 0 degrees and less than or equal to 90 degrees.
In some embodiments, 3 +.β +.5 °, and/or the dimension of the connector along its depth direction is L, the distance between the bisector of the included angle β and the lower surface of the tibial tray body is X, where 1.8 +.l/X +.3.
In some embodiments, the limiting parts are respectively arranged at two sides of the connecting piece along the thickness direction, and each limiting part comprises a plurality of long concave-convex parts, wherein at least two long concave-convex parts are distributed into a horn shape, and the opening directions of the horn concave-convex parts at two sides are opposite.
In some embodiments, at least some of the asperities are connected to enclose a polygonal or mesh structure; and/or the limiting part is a groove, a bulge or a combination of the bulge and the groove.
In some embodiments, the limiting portion is a groove, and at least part of an inner wall surface of the groove is a curved surface.
In some embodiments, the inner wall surface of the groove comprises an arc surface and a plane surface, the arc surface is positioned at the upper end of the plane surface, and the arc surface is tangential to the plane surface.
In a second aspect, embodiments of the present invention provide a knee prosthesis comprising a tibial tray prosthesis according to any of the above implementations of the first aspect.
The knee joint prosthesis according to the embodiment of the invention is not easy to loosen after being installed, and has good stability.
Drawings
Fig. 1 is a schematic view of the installation of a tibial tray prosthesis according to an embodiment of the invention.
Fig. 2 is a schematic view of a tibial tray prosthesis according to an embodiment of the invention.
Fig. 3 is a front view of a tibial tray prosthesis according to an embodiment of the invention.
Fig. 4 is a rear view of a tibial tray prosthesis according to an embodiment of the invention.
Fig. 5 is a side view of a tibial tray prosthesis according to an embodiment of the invention.
Fig. 6 is a partial schematic view of a tibial tray prosthesis according to an embodiment of the invention.
Fig. 7 is a graph of an anti-pullout force test for a tibial tray prosthesis of an embodiment of the invention having an included angle β in the range of 0-90 °.
Fig. 8 is a graph of an anti-pullout force test for a tibial tray prosthesis of an embodiment of the invention having an included angle β in the range of 0-15 °.
Fig. 9 is a graph of maximum displacement values for differently numbered tibial tray prostheses of an embodiment of the present invention when subjected to anterior-posterior forces.
100. A tibial tray body;
200. a connecting piece;
300. a limit part; 310. a first concave-convex portion; 320. a second concave-convex portion; 301. a groove; 3011. a cambered surface; 3012. a plane;
400. tibia.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A tibial tray prosthesis and a knee prosthesis according to embodiments of the present invention are described below with reference to fig. 1-9.
As shown in fig. 1 to 3, the tibial tray prosthesis according to the embodiment of the invention includes a tibial tray body 100 and a connector 200, the connector 200 is used for connecting a tibia 400, the connector 200 is provided at a lower end of the tibial tray body 100, a limiting part 300 is provided on the connector 200, and an included angle α is formed between at least a part of a length direction of the limiting part 300 and a length direction (e.g., an anterior-posterior direction in fig. 2) of the connector 200, wherein 0 ° < α < 90 °. The length direction of at least part of the limiting portion 300 may be the length direction of a part of the limiting portion 300 or the length direction of the whole limiting portion 300, and it is understood that the length direction of at least part of the limiting portion 300 is not parallel to the front-rear direction of the tibial tray body 100 or the up-down direction of the tibial tray body 100.
The inventor finds through experimental study that, after the tibial tray prosthesis is implanted into the tibia 400, if the infinite position part 300 or the limit part 300 on the connecting piece 200 is parallel to the length direction of the connecting piece 200, when the tibial tray prosthesis is pushed in the front-back direction, the tibial tray prosthesis can only be restrained by the bone cement shells at the front side and the back side, so that the possibility of fatigue fracture of the bone cement shells is increased, and the risk of loosening of the tibial tray prosthesis is increased; if the limiting portion 300 on the connecting piece 200 is perpendicular to the length direction of the connecting piece 200, when the tibial tray prosthesis is pushed in the up-down direction, the tibial tray prosthesis can only be constrained by the bone cement shells on the upper side and the lower side, so that the possibility of fatigue fracture of the bone cement shells is increased, and the risk of loosening of the tibial tray prosthesis is increased. When setting up spacing portion 300 to have certain contained angle, when the shin bone holds in the palm the prosthetic and receives the thrust from front to back, the bone cement shell of front and back side and the bone cement around spacing portion 300 can both play the constraint effect to the shin bone holds in the palm the prosthetic to the power that the bone cement bore on the unit area has been reduced, the loose risk of shin bone holds in the palm the prosthetic has been reduced.
According to the tibial tray prosthesis provided by the embodiment of the invention, the limiting part 300 is arranged on the connecting piece 200, so that after the connecting piece 200 is connected with the tibia 400 through bone cement, the contact area between the connecting piece 200 and the tibia 400 can be increased by the limiting part 300, the stability of the tibial tray prosthesis and the tibia 400 after installation is improved, the value range of the included angle alpha between the length direction of the limiting part 300 and the length direction of the connecting piece 200 is 0 degrees less than 90 degrees, and when the tibial tray prosthesis is subjected to the thrust in the front-back direction or the up-down direction, the movement of the tibial tray prosthesis relative to the tibia 400 can be further limited by the interaction of the bone cement shell and the limiting part 300 with a certain included angle, so that the tibial tray prosthesis after installation is not easy to loosen and has good stability.
In some embodiments, as shown in fig. 1 to 5, the stopper 300 includes a plurality of concave-convex portions, at least two of which are spaced apart in a depth direction (up-down direction in fig. 2) of the connector 200. It is understood that the number of concave-convex portions is two or more. For example, the stopper portion 300 includes a first concave-convex portion 310 and a second concave-convex portion 320, the first concave-convex portion 310 and the second concave-convex portion 320 are arranged at intervals along the depth direction (up-down direction in fig. 2) of the connector 200, and an angle β is formed between the length direction of the first concave-convex portion 310 and the length direction of the second concave-convex portion 320, wherein the angle β has a value ranging from 0 ° β to 90 °.
Here, either one of the first concave-convex portion 310 and the second concave-convex portion 320 may have an angle α with the longitudinal direction of the connector 200 in the longitudinal direction, or both may have an angle α with the longitudinal direction of the connector 200, respectively. The first concave-convex portion 310 and the second concave-convex portion 320 may be parallel to each other in the longitudinal direction, may be perpendicular to each other, or may form an acute angle. When the first concave-convex portion 310 and the second concave-convex portion 320 are perpendicular to each other or form an acute angle with each other in the length direction, when the tibial tray prosthesis receives the thrust of the front and rear sides, the force can be decomposed due to the existence of the included angle beta between the first concave-convex portion 310 and the second concave-convex portion 320, namely, the tibial tray in the front, rear, upper and lower directions and the bone cement in the groove can play a constraint role on the tibial tray, so that the force born by the bone cement in unit area is reduced, and the risk of loosening the tibial prosthesis is reduced. Preferably, the included angle beta is within the range of 3 degrees less than or equal to 5 degrees.
Specifically, the inventors of the present application conducted the following comparative experiments.
As shown in fig. 7, an anti-extraction force test graph of an angle β between the length direction of the first concave-convex portion 310 and the length direction of the second concave-convex portion 320 is within the range of 0+.β+.90°, it can be seen from the graph that when the angle β is smaller, the anti-extraction force value of the tibial tray prosthesis is larger, and thus the stability of the tibial tray prosthesis is higher.
Further, as shown in fig. 8, the inventors of the present application compare the values of the pull-out resistance force within the range of 0.ltoreq.β.ltoreq.15° included angle β to obtain the pull-out resistance force test graph with the range of 0 < β.ltoreq.15° included angle β, so that the inventors found by the test: when the included angle beta is more than or equal to 3 degrees and less than or equal to 5 degrees, the anti-pulling force value of the tibial tray prosthesis is larger, the stability of the tibial tray prosthesis is higher, and the effect is optimal.
In some embodiments, as shown in FIG. 3, the connector 200 has a dimension L along its depth and the angle β has a distance X between the bisector of the angle β and the lower surface of the tibial tray body 100, where 1.8L/X3. In this way, the first concave-convex portion 310 and the second concave-convex portion 320 are located at the middle part of the depth direction of the connector 200 due to the position limitation of the included angle β, so that the first concave-convex portion 310 and/or the second concave-convex portion 320 are prevented from being too short due to being too close to the upper end or the lower end of the connector 200, the length of the first concave-convex portion and/or the second concave-convex portion is ensured, the length of the limiting portion is ensured, the area of the limiting portion 300 for limiting is increased, for example, the limiting portion is a groove, the surface area of the groove is increased, the volume of bone cement contacted with the groove is also increased, and the stability of the tibial tray prosthesis is further improved. For example, L is 9mm, x=4 mm, i.e., the height of the connector 200 in the up-down direction is 9mm, and the distance between the bisector of the included angle β and the lower surface of the tibial tray body 100 is 4mm, so that the stability of the tibial tray prosthesis according to the embodiment of the present invention after installation is further improved and loosening is not easily performed.
In some embodiments, as shown in fig. 3 to 5, both sides of the connection member 200 in the thickness direction are provided with stopper portions 300, respectively. The limiting portion 300 includes a plurality of elongated concave-convex portions, wherein at least two elongated concave-convex portions are distributed in a horn shape, and openings of the horn-shaped concave-convex portions on two sides are opposite in direction.
It is also understood that the first concave-convex portion 310 and the second concave-convex portion 320 are provided on both sides of the connector 200 in the thickness direction, respectively. The first concave-convex portion 310 and the second concave-convex portion 320 of the both sides of the connection member 200 in the thickness direction are arranged in a horn-like structure. The direction of the included angle between the length direction of the first concave-convex part 310 on one side and the length direction of the second concave-convex part 320 on the other side is opposite to the direction of the included angle between the length direction of the first concave-convex part 310 on the other side and the length direction of the second concave-convex part 320, so that the rationality of the tibial tray prosthesis when being stressed can be further improved, and the risk of loosening the tibial tray prosthesis is reduced.
Specifically, as shown in fig. 9 and table 1, the inventors of the present application conducted the following comparative experiments.
The first concave-convex portion 310 and the second concave-convex portion 320 of the connecting member 200 of the tibial tray prosthesis of No. 1-1 have an included angle in one side thereof in the thickness direction, and the first concave-convex portion 310 and the second concave-convex portion 320 of the connecting member 200 have an included angle in the other side thereof in the thickness direction;
the first concave-convex portion 310 and the second concave-convex portion 320 of the connecting piece 200 of the tibial tray prosthesis of the number 1-2 form an included angle along one side in the thickness direction thereof, and the first concave-convex portion 310 and the second concave-convex portion 320 of the connecting piece 200 are arranged in parallel with each other along the other side in the thickness direction thereof;
the first concave-convex portion 310 and the second concave-convex portion 320 of the connector 200 of the tibial tray prosthesis of No. 1-3 are disposed parallel to each other along one side in the thickness direction thereof, and the first concave-convex portion 310 and the second concave-convex portion 320 of the connector 200 are disposed parallel to each other along the other side in the thickness direction thereof;
the first concave-convex portion 310 and the second concave-convex portion 320 of the connecting piece 200 of the tibial tray prosthesis of the serial numbers 1-4 form an included angle along one side in the thickness direction, and the other side of the connecting piece 200 does not have a limiting portion 300 along the thickness direction;
the first and second concavities and convexities 310 and 320 of the connector 200 of the tibial tray prosthesis of nos. 1 to 5 have no stopper 300 on one side thereof in the thickness direction, and the connector 200 has no stopper 300 on the other side thereof in the thickness direction.
The inventors measured and compared the maximum displacement values of the tibial tray prostheses numbered 1-1, 1-2, 1-3, 1-4, 1-5 when subjected to forces in the anterior-posterior direction as follows.
Table 1 maximum displacement contrast table for tibial tray prostheses
The inventor has found through analysis of test results that, when the same force is applied, the total displacement of the tibial tray prosthesis of the limiting part 300 with the included angle on both sides of the connecting piece 200 in the thickness direction thereof is minimum, so that the stability of the tibial tray prosthesis after installation can be further improved.
In some embodiments, at least part of the concave-convex parts are connected to form a polygonal or net structure, it may be understood that the concave-convex parts may form a triangle, a quadrangle or a polygon with curved edges, or may be a net structure formed by a plurality of mutually staggered concave-convex parts, and it may be understood that the value range of the included angle α between the length direction of one part of the limiting part 300 formed by a plurality of concave-convex parts and the length direction of the connecting piece 200 is 0 ° < α < 90 °, which is not limited.
In other embodiments, as shown in fig. 5 and 6, the limiting portion 300 is a groove, a protrusion, or a combination of a protrusion and a groove, for example, the limiting portion 300 is a groove 301, and the cross section of the groove 301 is a quadrilateral, triangle, circle, or mesh structure, it is understood that when the connecting member 200 is connected to the tibia 400 through bone cement, the bone cement may enter the gap of the groove 301, so that the connection strength of the connecting member 200 and the tibia 400 may be further enhanced.
Preferably, as shown in fig. 6, at least part of the inner wall surface of the groove 301 is curved. Specifically, the inner wall surface of the groove 301 includes an arc surface 3011 and a plane 3012, the arc surface 3011 is located at the upper end of the plane 3012, and the arc surface 3011 is tangent to the plane 3012, so that when bone cement is filled into the groove 301, the fluid bone cement can be convenient to fill the whole groove 301, an unfilled cavity in the groove 301 can be avoided, and the reliability of the tibial tray prosthesis after installation is further improved.
For example, as shown in FIG. 6, the plane 3012 may have an angle γ with the depth direction of the connector 200, where 30 ε. Ltoreq.γ. Ltoreq.45°, to further facilitate the bone cement filling the entire area enclosed by the recess 301. The cross section of the arc surface 3011 is an arc surface 3011, the diameter of the circle where the arc surface 3011 is located is 1.5mm, and the distance from the center of the circle where the arc surface 3011 is located to the notch of the groove 301 is 0.2mm. Therefore, the tibial tray prosthesis is good in stability and difficult to loosen when being connected with the tibia 400.
The knee joint prosthesis comprises the tibia support prosthesis in the embodiment, and the limiting part 300 is arranged on the connecting piece 200 of the tibia support prosthesis, so that after the connecting piece 200 is connected with the tibia 400 through bone cement, the contact area between the connecting piece 200 and the tibia 400 can be increased by the limiting part 300, the stability of the tibia support prosthesis and the tibia 400 after the tibia support prosthesis is installed is improved, the value range of an included angle alpha between the length direction of the limiting part 300 and the length direction of the connecting piece 200 is less than 0 degrees and less than 90 degrees, and when the tibia support prosthesis is subjected to thrust in the front-back direction or the up-down direction, the movement of the tibia support prosthesis relative to the tibia 400 can be further limited by interaction of the bone cement shell and the limiting part 300 with a certain included angle, so that the tibia support prosthesis after being installed is not easy to loose and has good stability.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (7)
1. The tibia support prosthesis is characterized by comprising a tibia support body (100) and a connecting piece (200), wherein the connecting piece (200) is used for connecting tibia (400), the connecting piece (200) is arranged at the lower end of the tibia support body (100), a limiting part (300) is arranged on the connecting piece (200), and an included angle alpha is formed between at least part of the length direction of the limiting part (300) and the length direction of the connecting piece (200), wherein 0 degree is less than or equal to alpha and less than 90 degrees;
the limiting part (300) comprises a plurality of concave-convex parts, wherein at least two concave-convex parts are arranged along the depth direction of the connecting piece (200);
the limiting part (300) comprises a first concave-convex part (310) and a second concave-convex part (320), the first concave-convex part (310) and the second concave-convex part (320) are arranged along the depth direction of the connecting piece (200), and an included angle beta is formed between the length direction of the first concave-convex part (310) and the length direction of the second concave-convex part (320), wherein beta is more than or equal to 0 degree and less than or equal to 90 degrees;
the limiting parts (300) are respectively arranged on two sides of the connecting piece (200) along the thickness direction, and each limiting part comprises a plurality of long-strip-shaped concave-convex parts, wherein at least two long-strip-shaped concave-convex parts are distributed into a horn shape, and the opening directions of the horn-shaped concave-convex parts on two sides are opposite.
2. The tibial tray prosthesis according to claim 1, wherein the limiting parts (300) are provided on both sides of the connecting piece (200) in the thickness direction, respectively.
3. The tibial tray prosthesis according to claim 1, wherein 3 ° - β -5 ° and/or the dimension of said connector (200) in its depth direction is L, the distance between the bisector of said included angle β and the lower surface of said tibial tray body (100) is X, wherein 1.8-L/X-3.
4. The tibial tray prosthesis of claim 1 wherein at least a portion of the concavities and convexities are connected to enclose a polygon or a mesh; and/or the number of the groups of groups,
the limiting part (300) is a groove, a bulge or a combination of the bulge and the groove.
5. The tibial tray prosthesis of claim 4, wherein said limiting part (300) is a groove (301), and at least part of an inner wall surface of said groove (301) is a curved surface.
6. The tibial tray prosthesis of claim 5, wherein the inner wall surface of said recess (301) comprises a curved surface (3011) and a planar surface (3012), said curved surface (3011) being located at an upper end of said planar surface (3012), and said curved surface (3011) being tangential to said planar surface (3012).
7. A knee prosthesis comprising a tibial tray prosthesis according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110566321.8A CN113367854B (en) | 2021-05-24 | 2021-05-24 | Tibial tray prosthesis and knee joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110566321.8A CN113367854B (en) | 2021-05-24 | 2021-05-24 | Tibial tray prosthesis and knee joint prosthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113367854A CN113367854A (en) | 2021-09-10 |
| CN113367854B true CN113367854B (en) | 2023-08-01 |
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| CN202110566321.8A Active CN113367854B (en) | 2021-05-24 | 2021-05-24 | Tibial tray prosthesis and knee joint prosthesis |
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