CN107693167B

CN107693167B - Tibial insert prosthesis, tibial prosthesis and artificial knee joint

Info

Publication number: CN107693167B
Application number: CN201711063261.8A
Authority: CN
Inventors: 张晏萌
Original assignee: Beijing Ansong Technology Co ltd
Current assignee: Beijing Ansong Technology Co ltd
Priority date: 2017-11-02
Filing date: 2017-11-02
Publication date: 2024-01-16
Anticipated expiration: 2037-11-02
Also published as: CN107693167A

Abstract

The invention relates to the technical field of medical appliances, in particular to a tibial insert prosthesis, a tibial prosthesis and an artificial knee joint. The tibial insert prosthesis includes a tibial insert base, a CR insert, and a PS insert; the tibial gasket base body comprises a gasket top surface and a gasket joint surface corresponding to the gasket top surface, wherein the gasket joint surface is used for being connected with a tibial tray prosthesis; the top surface is provided with a basic body groove; the CR insert block can be detachably connected with the tibial gasket base body through the base body groove; the PS plug can be detachably connected with the tibial gasket base body through the base body groove. The tibial prosthesis includes a tibial insert prosthesis. The artificial knee joint includes a tibial insert prosthesis or includes a tibial prosthesis. The present invention aims to provide a tibial insert prosthesis and a tibial prosthesis and an artificial knee joint for realizing the conversion between a PS type and a CR type of the tibial insert prosthesis.

Description

Tibial insert prosthesis, tibial prosthesis and artificial knee joint

Technical Field

The invention relates to the technical field of medical appliances, in particular to a tibial insert prosthesis, a tibial prosthesis and an artificial knee joint.

Background

In prosthetic knee joint prosthesis systems, there are two main forms of knee joint prosthesis, one is a PS tibial prosthesis with a post (see fig. 1-1) and the other is a CR tibial prosthesis without a post (see fig. 1-2). Wherein, the tibia prosthesis with the upright post is matched with the femur condyle prosthesis with the cam, and finally the assembling relation of the PS type prosthesis is formed. And the tibial prosthesis without the upright post is matched with the femoral condyle prosthesis without the cam to form the assembling relationship of the CR type prosthesis. Wherein, the PS type is named as post-stable type; the proprietary name of the CR type is posterior cruciate ligament retaining type.

In performing artificial knee replacement, a doctor determines according to the final result of examination of the patient, and if the posterior cruciate ligament of the patient is not lost or diseased, the patient still has a healthy form, and the doctor can select to reserve the posterior cruciate ligament during operation, so that the CR type knee prosthesis system is used; if the patient's posterior cruciate ligament has been damaged or diseased very severely, losing the function that the ligament should have, the physician may choose to resect the posterior cruciate ligament during surgery, thereby using the PS-type knee prosthesis system.

The option of retaining or resecting the posterior cruciate ligament is a difficult option for the surgeon. The surgical plan planned prior to surgery may be inaccurate and may change at any time while the surgery is actually performed. Especially, when it is decided to use the CR type knee prosthesis system before an operation, it is found that the patient's posterior cruciate ligament cannot be used any more in the operation, and only the PS type knee prosthesis system can be cut off to be replaced, or the posterior cruciate ligament is damaged due to a mistake in the operation, and the PS type knee prosthesis system must be replaced. The replacement of surgical solutions can cause confusion in the preparation of the knee prosthesis system and even possible rejection of the already opened prosthesis.

Tibial prostheses are an important component of knee prosthesis systems. The tibial prosthesis is divided into an integral type and a split type, and the split type tibial prosthesis comprises a tibial liner prosthesis and a tibial tray prosthesis. The present application addresses the above-described problems by providing a tibial insert prosthesis and tibial and artificial knee joint that achieve a transition between the PS and CR types of tibial insert prostheses.

Disclosure of Invention

The present invention aims to provide a tibial insert prosthesis to achieve a transition between the PS-type and the CR-type of the tibial insert prosthesis.

The present invention aims to provide a tibial insert prosthesis to achieve a transition between the PS and CR types of tibial insert prostheses.

The object of the present invention is to provide an artificial knee joint to achieve a transition between the PS-type and the CR-type of tibial insert prosthesis.

Based on the first object, the tibial insert prosthesis provided by the invention comprises a tibial insert basic body, a CR insert block and a PS insert block;

the tibial gasket base body comprises a gasket top surface and a gasket joint surface corresponding to the gasket top surface, wherein the gasket joint surface is used for being connected with a tibial tray prosthesis; the top surface is provided with a basic body groove;

the CR insert block can be detachably connected with the tibial gasket base body through the base body groove;

the PS plug can be detachably connected with the tibial gasket base body through the base body groove.

Optionally, the PS plug includes a plug portion and a column portion fixedly connected in sequence; the inserting part can be detachably connected with the tibia pad basic body through the basic body groove; the column part is a column of the tibial gasket prosthesis;

the shape of the inserting part is the same as that of the CR inserting block.

Optionally, the CR insert and the PS insert may be connected to the tibial insert base by screws, pins, or keys, respectively;

along the width direction of the basic body groove, the CR plug block and the PS plug block can be respectively connected with the basic body groove through mortise and tenon structures.

Optionally, the tibial insert base body is fixedly provided with a stop block; the base body groove is opened at one end along the length direction of the base body groove, and the other end of the base body groove is connected with the stop block; a screw, pin or key passing through the stop block can be connected with the CR plug or the PS plug;

and/or the number of the groups of groups,

the bottom of the basic body groove is provided with a first groove bottom connecting hole; and a screw, a pin or a key penetrates through the CR plug or the PS plug to be connected with the first groove bottom connecting hole.

Optionally, a stop tenon strip or a stop mortise is arranged on one surface of the stop block, which is contacted with the groove of the basic body; corresponding surfaces of the CR plug block and the PS plug block are respectively provided with a stop mortise and a stop tenon strip matched with the stop tenon strip or the stop mortise;

screws, pins or keys pass through the posts of the PS plug;

the cross section of the basic body groove along the width direction of the basic body groove is in a dovetail shape.

Optionally, the CR insert and the PS insert may be connected to the tibial insert base body by one or more of mortise and tenon structures, threaded connections, pin connections, and keyed connections, respectively.

Optionally, the periphery of the plug-in part is provided with threads, and correspondingly, the basic body groove is provided with internal threads, so that the PS plug block is in threaded connection with the tibial liner basic body;

or the basic body groove is a second groove bottom connecting hole; and a screw, a pin or a key passes through the CR plug or the PS plug to be connected with the second groove bottom connecting hole.

Based on the second object, the tibial insert prosthesis provided by the invention comprises the tibial insert prosthesis.

Optionally, the tibial prosthesis further comprises a tibial tray prosthesis;

the tibia support prosthesis comprises a tibia base and a fixing column fixedly connected with the tibia base;

a flange is fixedly arranged on one surface of the tibia base, which is far away from the fixed column; the flange forming a base recess connected to the tibial insert base;

the height of the flange is higher than the bottom of the base body groove, and the base groove can be connected with a CR plug or a PS plug.

Based on the third object, the artificial knee joint provided by the invention comprises the tibial gasket prosthesis or the tibial prosthesis.

The tibial gasket prosthesis provided by the invention is detachably connected with the tibial gasket base body through the CR plug block and the base body groove, and the PS plug block is detachably connected with the tibial gasket base body through the base body groove, so that the PS type and the CR type of the tibial gasket prosthesis are converted; that is, when the PS tibial insert prosthesis is required to be used, the PS insert block is fixedly connected to the tibial insert base body, and when the CR tibial insert prosthesis is required to be used, the CR insert block is fixedly connected to the tibial insert base body. The tibial insert prosthesis can help doctors to quickly adjust the operation method, facilitates the operations of the doctors, saves the operation time and is more beneficial to patients.

According to the tibial prosthesis and the artificial knee joint, the PS type and the CR type of the tibial pad prosthesis are converted through the PS plug and the CR plug, so that a doctor can be helped to quickly adjust an operation method, operation of the doctor is facilitated, operation time is saved, and the tibial pad prosthesis is more beneficial to a patient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1-1 is a schematic illustration of the structure of a prior art PS tibial prosthesis;

FIGS. 1-2 are schematic illustrations of the construction of a prior art CR tibial prosthesis;

FIG. 2-1 is an exploded view of a first PS tibial insert prosthesis according to an embodiment of the present invention;

fig. 2-2 are first angular structural views of a first PS tibial insert prosthesis according to an embodiment of the present invention;

FIGS. 2-3 are schematic views of a second angular configuration of a first PS tibial insert prosthesis according to an embodiment of the present invention;

FIGS. 2-4 are A-A cross-sectional views of the tibial insert prosthesis of FIGS. 2-3;

FIGS. 2-5 are top views of the tibial insert prosthesis of FIGS. 2-3;

FIGS. 2-6 are B-B side cross-sectional views of the tibial insert prosthesis of FIGS. 2-5;

FIG. 3-1 is an exploded view of a first CR tibial insert prosthesis provided in accordance with one embodiment of the present invention;

fig. 3-2 is a first angular schematic view of a first CR-type tibial insert prosthesis according to an embodiment of the present invention;

fig. 3-3 are schematic views of a second angular configuration of a first CR-type tibial insert prosthesis according to an embodiment of the present invention;

FIGS. 3-4 are C-C cross-sectional views of the tibial insert prosthesis of FIGS. 3-3;

fig. 3-5 are top views of the tibial insert prosthesis shown in fig. 3-3;

FIGS. 3-6 are D-D cross-sectional views of the tibial insert prosthesis of FIGS. 3-5;

FIG. 4-1 is a schematic view of a first angular configuration of a tibial insert base body of a first tibial insert prosthesis according to an embodiment of the present invention;

fig. 4-2 is a schematic view of a second angular configuration of a tibial insert base body of a first tibial insert prosthesis according to an embodiment of the present invention;

FIG. 4-3 is an E-E cross-sectional view of the tibial insert base body of FIG. 4-2;

fig. 4-4 is a top view of the tibial insert base body of fig. 4-2;

FIGS. 4-5 are F-F cross-sectional views of the tibial insert base body of FIGS. 4-4;

FIG. 5-1 is a first angular configuration diagram of a PS plug of a first tibial insert prosthesis according to an embodiment of the present invention;

fig. 5-2 is a second angular schematic view of a PS plug of a first tibial insert prosthesis according to an embodiment of the present invention;

FIG. 5-3 is a G-G cross-sectional view of the PS plug shown in FIG. 5-2;

FIG. 5-4 is a top view of the PS plug shown in FIG. 5-2;

FIG. 6-1 is a schematic view of a first angular configuration of a CR insert of a first tibial insert prosthesis according to an embodiment of the present invention;

FIG. 6-2 is a schematic view of a second angular configuration of a CR insert of a first tibial insert prosthesis according to an embodiment of the present invention;

FIG. 6-3 is an H-H cross-sectional view of the CR insert of FIG. 6-2;

FIG. 6-4 is a top view of the CR insert of FIG. 6-2;

FIG. 7-1 is an exploded view of a second PS tibial insert prosthesis according to an embodiment of the present invention;

fig. 7-2 is an exploded view of a second CR tibial insert prosthesis provided in accordance with a first embodiment of the present invention;

fig. 7-3 are schematic structural views of a PS plug of a second tibial insert prosthesis according to an embodiment of the present invention;

FIG. 7-4 is an I-I cross-sectional view of the PS plug shown in FIG. 7-3;

fig. 7-5 are schematic views of a CR insert block of a second tibial insert prosthesis according to an embodiment of the present invention;

FIGS. 7-6 are J-J cross-sectional views of the CR insert of FIGS. 7-5;

FIG. 8-1 is a schematic illustration of a tibial insert base body of a third tibial insert prosthesis according to an embodiment of the present invention;

fig. 8-2 is a schematic illustration of a PS plug of a third tibial insert prosthesis according to an embodiment of the present invention;

fig. 8-3 are schematic views of a CR insert block of a third tibial insert prosthesis according to an embodiment of the present invention;

FIG. 9-1 is an exploded view of a PS-tibial prosthesis according to a second embodiment of the present invention;

fig. 9-2 is an exploded view of a CR-type tibial prosthesis according to a second embodiment of the present invention;

fig. 9-3 are perspective views of a PS tibial prosthesis provided in accordance with a second embodiment of the present invention;

fig. 9-4 are perspective views of a CR-type tibial prosthesis provided in accordance with a second embodiment of the present invention.

Icon: 200-tibial insert prosthesis; 210-tibial insert base; 211-top surface of the liner; 212-a base body groove; 2121-first groove bottom connecting holes; 2122-second groove bottom connecting holes; 213-stop blocks; 220-CR plug-in block; 230-PS plug; 231-plug-in part; 232-column part; 300-tibial tray prosthesis; 310-tibial base; 311-flanges; 312-a base recess; 320-fixing the column.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1

Referring to fig. 2-1 through 8-3, the present embodiment provides a tibial insert prosthesis; referring to fig. 2-1 to 6-4, a schematic diagram of a PS-type and a CR-type tibial insert prosthesis according to the present embodiment is provided, wherein the CR insert or the PS insert is connected to the tibial insert base body by a mortise and tenon structure and a screw. Referring to fig. 7-1 to 7-6, there are provided related schematic views of a PS-type and a CR-type of another tibial insert prosthesis according to this embodiment, in which a CR insert or a PS insert is connected to a tibial insert base body by mortise and tenon structures and two screws. Referring to fig. 8-1 to 8-3, there are provided a related schematic views of a third tibial insert prosthesis of PS type and CR type according to the present embodiment, wherein the CR insert or PS insert is screwed with the tibial insert base body, and the threads are not shown.

The sagittal plane of this embodiment is a plane that divides the human body into left and right parts in the human anatomy, and is simply the sagittal plane, regardless of whether the parts are equivalent. For example, the views of FIGS. 2-4, 3-4, 5-3, and 7-6 are all shown on the sagittal plane.

Referring to fig. 2-1 to 8-3, the tibial insert prosthesis provided in this embodiment is applied to a tibial prosthesis and also to an artificial knee joint, and includes a tibial insert base 210, a CR insert 220, and a PS insert 230.

The tibial insert base body 210 includes an insert top surface 211 and an insert bonding surface corresponding to the insert top surface 211 for coupling with a tibial tray prosthesis. The liner top surface 211 is provided with a base body recess 212. The liner top surface 211 of the tibial liner base body 210 may also be understood as the mating surface for mating connection with a femoral condyle prosthesis.

The CR insert 220 is removably attachable to the tibial insert base 210 via the base recess 212 to form a CR type tibial insert prosthesis.

The PS insert block 230 can be removably coupled to the tibial insert base body 210 via the base body recess 212 to form a PS tibial insert prosthesis.

In the tibial insert prosthesis of the embodiment, the CR insert block 220 is detachably connected with the tibial insert base body 210 through the base body groove 212, and the PS insert block 230 is detachably connected with the tibial insert base body 210 through the base body groove 212, so that the PS type and the CR type of the tibial insert prosthesis are converted; that is, when the PS tibial insert prosthesis is required, the PS insert block 230 is fixedly connected to the tibial insert base 210, and when the CR tibial insert prosthesis is required, the CR insert block 220 is fixedly connected to the tibial insert base 210. The tibial insert prosthesis can help doctors to quickly adjust the operation method, facilitates the operations of the doctors, saves the operation time and is more beneficial to patients.

In the prior art, both PS-type and CR-type knee prosthesis systems (including femoral condyle prostheses and tibial prostheses, including tibial insert prostheses and tibial tray prostheses) are often prepared in performing artificial knee replacements to prevent overwhelming in the course of surgical procedure changes. However, the tibial insert prosthesis is patient-specific, two sets of tibial insert prostheses prepared during surgery, which undoubtedly increases the amount of spare power for the medical equipment manufacturer, thereby increasing the cost of the tibial insert prosthesis, and increasing the cost of the artificial knee joint, increasing the economic burden on the patient. The tibial gasket prosthesis creatively solves the problem of selecting a CR type prosthesis and a PS type prosthesis in operation by adopting split, universal, plug-in type and other design modes, can help doctors to quickly adjust an operation method, and saves operation time; meanwhile, the tibia pad prosthesis realizes the switching of the CR type prosthesis and the PS type prosthesis through the switching of the CR plug 220 and the PS plug 230, so that the stock of medical instrument manufacturers can be reduced to the greatest extent, the stock pressure is reduced, the consumption of raw materials is reduced, the cost can be reduced to the great extent, and the benefit of enterprises is improved.

Referring to fig. 5-1 to 5-4, 7-3, and 7-4, in an alternative of this embodiment, PS plug 230 includes a plug portion 231 and a post portion 232 fixedly connected in sequence. The plug 231 is removably attachable to the tibial insert base 210 via the base recess 212. The post portion 232 is the post of the PS insert 230, i.e., the post of the tibial insert prosthesis and the post of the tibial prosthesis.

Optionally, the socket 231 is shaped identically to the CR insert 220 for ease of handling by the surgeon and also for ease of manufacturing the tibial insert prosthesis. For example, the shape of the socket 231, i.e., the CR plug 220, is a cylinder, a square cylinder, an oval cylinder, a rectangular cylinder, or any other shape.

Referring to fig. 8-1 to 8-3, in the alternative of the present embodiment, the insertion part 231 is cylindrical, the outer circumference of the insertion part 231 is provided with threads, and the base body groove 212 is correspondingly provided with internal threads, so that the PS insert 230 is screwed with the tibial insert base body 210; the CR plug 220 has the same shape as the socket 231, and thus the outer circumference of the CR plug 220 is also provided with threads.

In an alternative of this embodiment, the base body recess 212 is a second groove bottom connecting hole 2122; the screw, pin or key is connected to the second groove bottom connection hole 2122 along passing through the CR insert 220 or the PS insert 230, i.e., the screw, pin or key is connected to the second groove bottom connection hole 2122 along passing through the CR insert 220, or the screw, pin or key is connected to the second groove bottom connection hole 2122 along passing through the PS insert 230 to fixedly connect the tibial insert base 210 and the CR insert 220 or the PS insert 230 from the depth direction of the base recess 212.

In an alternative to this embodiment, the CR insert 220 and the PS insert 230 can each be coupled to the tibial insert base body 210 by one or more of a mortise and tenon arrangement, a threaded connection, a pin connection, and a keyed connection. For example, the CR and PS inserts 220, 230 can be threaded with the tibial insert base body 210, respectively, as well as the CR and PS inserts 220, 230 can be pinned with the tibial insert base body 210, respectively, as well as the CR and PS inserts 220, 230 can be threaded with the tibial insert base body 210, respectively, with a mortise and tenon arrangement, and so forth. The CR insert 220 and the PS insert 230 may also be removably coupled to the tibial insert base body 210 by other means.

Referring to fig. 2-1 through 6-4, in an alternative to this embodiment, the CR insert block 220 and the PS insert block 230 can be connected to the tibial insert base body 210 by screws, pins, or keys, respectively; alternatively, the CR insert 220 and the PS insert 230 may be screwed to the tibial insert base body 210, respectively, with a simpler and stronger screw connection.

Along the width direction of the base body groove 212, the CR plug 220 and the PS plug 230 can be connected with the base body groove 212 through mortise and tenon structures, respectively. The CR insert 220 or the PS insert 230 is inserted into the base body groove 212 of the tibial liner base body 210 through a mortise and tenon structure, and the CR insert 220 and the PS insert 230 are connected with the tibial liner base body 210 through screws, pins or keys, so that on one hand, the connection precision between the CR insert 220 and the PS insert 230 and the tibial liner base body 210 is improved, and further, the precision of the tibial liner prosthesis is improved, and on the other hand, the connection mode is easy and convenient to operate, and is beneficial to doctors to use. Optionally, the length of the base body recess 212 is parallel to the sagittal plane of the tibial insert prosthesis.

Referring to fig. 4-1, optionally, tibial insert base body 210 is fixedly provided with stop block 213; optionally, the stop block 213 is integrally formed with the tibial insert base body 210. The stop 213 may be fixedly attached to the tibial insert base 210 by adhesive, screw, or the like.

The base body groove 212 is opened at one end in the longitudinal direction thereof, and the other end is connected to the stopper 213. The stopper 213 facilitates the limitation of the CR plug 220 or the PS plug 230 in the length direction of the base body groove 212, which is helpful to improve the precision of the insertion of the CR plug 220 or the PS plug 230. Optionally, the tibial insert base body 210 includes a front edge and a rear edge, the rear edge including a left rear edge and a right rear edge, a rear edge recess being formed between the left rear edge and the right rear edge; the open end of the base body recess 212 faces the backup recess, and the stop block 213 is near the leading edge.

The screw, pin or key can be coupled with the CR plug 220 or the PS plug 230 through the stopper 213, i.e., the screw, pin or key can be coupled with the CR plug 220 through the stopper 213, or the screw, pin or key can be coupled with the PS plug 230 through the stopper 213 to fix the CR plug 220 or the PS plug 230 in the length direction of the base body groove 212. Optionally, the direction of threading or insertion of the screw, pin or key is parallel to the sagittal plane direction of the tibial insert prosthesis.

Optionally, a stop tongue or a stop groove (not shown) is provided on a surface of the stop block 213 contacting the base body groove 212.

The corresponding surfaces of the CR plug block 220 and the PS plug block 230 matched with the stop block 213 are respectively provided with a stop mortise and tenon groove or a stop tenon strip matched with the stop mortise and tenon groove. The precision of the cooperation between the CR insert block 220 or the PS insert block 230 and the stop block 213 in the length direction of the base body groove 212 is further improved by mortise and tenon cooperation of the stop tenon strip and the stop mortise and tenon groove, thereby further improving the precision of the tibial insert prosthesis. Optionally, the stop tongue extends in the width direction of the base body groove 212.

Referring to fig. 7-1 and 7-2, in an alternative of the present embodiment, the groove bottom of the base body groove 212 is provided with a first groove bottom connecting hole 2121;

the screw, pin or key is coupled to the first groove bottom coupling hole 2121 through the CR insert 220, or the screw, pin or key is coupled to the first groove bottom coupling hole 2121 through the PS insert 230 to fixedly couple the tibial insert base body 210 with the CR insert 220 or PS insert 230 in a depth direction of the base body recess 212.

Alternatively, the screw, pin or key passes through the post of the PS insert 230, i.e., the screw, pin or key passes through the post portion 232 of the PS insert 230; to improve the connection securement of the PS insert 230 to the tibial insert base body 210.

Alternatively, the CR insert 220 or the PS insert 230 may be coupled to the base body recess 212 by a dovetail, rectangular, semi-circular, or other shaped mortise and tenon configuration. Optionally, the base body recess 212 may be dovetail-shaped in cross-section along its width to facilitate the manufacturing process of the tibial insert base body 210.

Alternatively, the CR insert 220 or the PS insert 230 may be pinned to the tibial insert base body 210 by rectangular, circular, conical, or the like pins.

Alternatively, the CR insert 220 or the PS insert 230 may be keyed to the tibial insert base body 210 by flat keys, splines, etc.

In this embodiment, the CR insert 220 or the PS insert 230 is connected with the base body groove 212 by a mortise and tenon structure to constrain the CR insert 220 or the PS insert 230 from the width direction of the base body groove 212; the CR insert 220 or PS insert 230 may be coupled to the first slot bottom coupling hole 2121 by screws, pins, or keys through the CR insert 220/PS insert 230 to secure the CR insert 220 or PS insert 230 to the tibial insert base 210 from the depth direction of the base body recess 212; the CR insert 220/PS insert 230 may also be coupled to the CR insert 220/PS insert 230 by screws, pins, or keys through the stop block 213 to secure the CR insert 220 or PS insert 230 to the tibial insert base 210 from the length of the base body recess 212 (see fig. 2-1 through 6-4); screws, pins or keys may also be used to connect through the CR insert block 220/PS insert block 230 and the first slot bottom attachment hole 2121, and screws, pins or keys may be used to connect through the stop block 213 and the CR insert block 220/PS insert block 230 to secure the CR insert block 220 or PS insert block 230 to the tibial insert base body 210 from the depth and length directions of the base body recess 212 (see fig. 7-1 through 7-6).

Optionally, when a threaded connection is used, the nominal diameter of the screw is not less than M3; alternatively, the nominal diameter of the screw is not less than M3 and not greater than M10.

During the procedure, regardless of the type of knee prosthesis ultimately selected, the CR tibial insert prosthesis is first used, and after a positive selection, the CR insert 220 may be selected to be inserted into the tibial insert base body 210, or may be selected to be not inserted such that the base body recess 212 is exposed. If the surgical plan is finally changed and the PS tibial insert prosthesis is selected, the PS insert block 230 may be selected for insertion into the tibial insert base body 210, thereby achieving the objective of implanting the PS tibial insert prosthesis.

Example two

A second embodiment provides a tibial insert prosthesis, where the features of the tibial insert prosthesis described in the first embodiment are applicable to the second embodiment, and the features of the tibial insert prosthesis disclosed in the first embodiment are not repeated.

Fig. 9-1 to 9-4 are schematic diagrams showing the PS-type and CR-type of the tibial prosthesis according to the present embodiment.

Referring to fig. 9-1 to 9-4 in combination with fig. 2-1 to 8-3, the tibial prosthesis provided in this embodiment includes a tibial insert prosthesis 200; also included is a tibial tray prosthesis 300.

The tibial tray prosthesis 300 includes a tibial base 310 and a fixation post 320 fixedly connected to the tibial base 310; the tibial tray prosthesis 300 is coupled to the tibia of the human body by the fixation post 320.

Optionally, a flange 311 is fixedly disposed on a surface of the tibial base 310 away from the fixing post 320; the flange 311 forms a base recess 312 that connects with the tibial insert base body 210; optionally, the flange 311 is fixedly disposed at the periphery of the tibial base 310 and is annular; so that the tibial base 310 is more securely coupled to the tibial insert prosthesis 200.

Alternatively, the height of the flange 311 is higher than the bottom of the base body groove 212, and the base groove 312 can be connected with the CR plug 220 or the PS plug 230; such that a portion of the CR insert 220 or the PS insert 230 is positioned within the base recess 312 such that the flange 311 can limit movement of the CR insert 220 or the PS insert 230 relative to the tibial insert base body 210, improving the stability of the tibial insert prosthesis 200 and, thus, the tibial prosthesis.

The tibial prosthesis of this embodiment has the advantages of the tibial insert prosthesis 200 of embodiment one, and the advantages of the tibial insert prosthesis 200 of embodiment one disclosed are not repeated here.

Example III

A third embodiment provides an artificial knee joint, the embodiment including the tibial insert prosthesis of the first embodiment, the technical features of the tibial insert prosthesis of the first embodiment disclosed also apply to the embodiment, and the technical features of the tibial insert prosthesis of the first embodiment disclosed will not be repeated.

The artificial knee joint provided in the third embodiment may further include the tibial prosthesis described in the second embodiment, and the technical features of the tibial prosthesis disclosed in the second embodiment are also applicable to the second embodiment, and the technical features of the tibial prosthesis disclosed in the second embodiment are not repeated.

The artificial knee joint provided by the embodiment comprises a tibial prosthesis with a tibial liner prosthesis and also comprises a femoral condyle prosthesis. The tibial insert prosthesis of the tibial prosthesis is in fit connection with the femoral condyle prosthesis. The tibial pad prosthesis of the tibial prosthesis is CR-type, and the femoral condyle prosthesis is also CR-type; the tibial insert prosthesis of the tibial prosthesis is PS-type and the femoral condyle prosthesis is also PS-type. The upright post of the PS-type tibial insert prosthesis is movably connected with the intercondylar box of the PS-type femoral condyle prosthesis. Through PS plug and CR plug, realized the conversion between PS type and the CR type of shin bone pad prosthetic, also realized the conversion between PS type and the CR type of shin bone prosthetic, can help the doctor to make the adjustment of operation method rapidly, made things convenient for the doctor to perform the operation, saved operation time to it is more favorable to the patient.

The artificial knee joint of this embodiment has the advantages of the tibial insert prosthesis of embodiment one, the advantages of which are disclosed herein and will not be repeated here; the artificial knee joint of this embodiment has the advantages of the tibial prosthesis of embodiment two, and the advantages of the tibial prosthesis disclosed in embodiment two are not repeated here.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. A tibial insert prosthesis comprising a tibial insert base, a CR insert, and a PS insert;

the PS plug can be detachably connected with the tibial gasket base body through the base body groove;

the PS plug block comprises a plug part and a column part which are sequentially and fixedly connected; the inserting part can be detachably connected with the tibia pad basic body through the basic body groove; the column part is a column of the tibial gasket prosthesis;

the shape of the inserting part is the same as that of the CR inserting block;

the CR plug and the PS plug can be respectively connected with the tibia pad basic body through one or more of mortise and tenon structures, threaded connection, pin connection and key connection.

2. The tibial insert prosthesis of claim 1, wherein said CR insert block and said PS insert block are each connectable with said tibial insert base body by screws, pins, or keys;

3. The tibial insert prosthesis of claim 2, wherein said tibial insert base body is fixedly provided with a stop block; the base body groove is opened at one end along the length direction of the base body groove, and the other end of the base body groove is connected with the stop block; a screw, pin or key passing through the stop block can be connected with the CR plug or the PS plug;

4. The tibial insert prosthesis of claim 3, wherein a stop tongue or groove is provided on a surface of the stop block contacting the base body recess; corresponding surfaces of the CR plug block and the PS plug block are respectively provided with a stop mortise and a stop tenon strip matched with the stop tenon strip or the stop mortise;

screws, pins or keys pass through the posts of the PS plug;

5. The tibial insert prosthesis of claim 1, wherein the insert portion is threaded on an outer periphery thereof and the base body recess is correspondingly internally threaded to threadably couple the PS insert block with the tibial insert base body;

the base body groove is a second groove bottom connecting hole; and a screw, a pin or a key passes through the CR plug or the PS plug to be connected with the second groove bottom connecting hole.

6. A tibial insert prosthesis comprising the tibial insert prosthesis of any one of claims 1 to 5.

7. The tibial prosthesis of claim 6, further comprising a tibial tray prosthesis;

8. An artificial knee joint comprising the tibial insert prosthesis of any one of claims 1-5, or comprising the tibial prosthesis of any one of claims 6 or 7.