CN114376771A - Multifunctional elbow joint placeholder - Google Patents

Abstract

The invention provides a multifunctional elbow joint spacer, which solves the problems of unstable connection of elbow joint prosthesis and the like and comprises an ulnar joint cement body, wherein the ulnar joint cement body, a proximal radioulnar joint cement body and a distal radioulnar joint cement body correspond to each other pairwise, a cushion layer is coated at the end of the ulnar joint cement body, the proximal radioulnar joint cement body and the proximal radiohumeral joint cement body are respectively connected with an installation seat body through buckling mechanisms, the installation seat body is embedded into the proximal radioulnar joint cement body and the distal radiohumeral joint cement body and is fixedly provided with a wear-resistant layer, the wear-resistant layer is coated at the outer sides of the proximal radioulnar joint cement body and the distal radiohumeral joint cement body, and a locking mechanism is arranged between the wear-resistant layer and the installation seat body. The invention has the advantages of good connection stability, simple structure and the like.

Description

Multifunctional elbow joint placeholder

technical field

The invention belongs to the technical field of medical devices, and in particular relates to a multifunctional elbow joint spacer.

Background technique

The elbow joint consists of the distal end of the humerus and the proximal end of the radius and ulna. Structurally, it includes three joints, which are collectively encased in a joint capsule. Elbow prosthesis is a surgical implant used in elbow replacement to replace the elbow joint of human patients. At present, the existing elbow joint prosthesis is mainly composed of a humerus prosthesis, an ulnar prosthesis, a joint shaft locking screw and a shaft sleeve. The humerus prosthesis is used to connect with the humerus of the human body, the ulnar prosthesis is used to connect with the ulna of the human body, and the joint shaft locking screw is used to connect the ends of the humeral prosthesis and the ulnar prosthesis so that the two can rotate relative to each other to realize the elbow For the function of joint movement, the shaft sleeve is sleeved between the humerus prosthesis and the joint shaft locking screw, and the ulnar prosthesis and the joint shaft locking screw to avoid the contact between the metal materials. However, in the actual use process, the existing elbow joint movement effect is poor. In addition, after the operation is completed, its connection state is unstable, and it is prone to loosening and dislocation.

In order to solve the shortcomings of the existing technology, people have carried out long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a knee joint spacer and its preparation method [202010156871.8], which includes a first bone cement main body part, a first Kirschner wire and a first metal prosthesis contact part; a first metal prosthesis The upper surface of the contact part is connected with the lower end of the first bone cement main body part; the first Kirschner wire is arranged in the middle part of the first bone cement main body part and the first metal prosthesis contact part; Two Kirschner wires are in contact with the second metal prosthesis, the upper end of the second metal prosthesis contact portion is connected with the lower end of the second bone cement main body, and the second Kirschner wire is arranged on the second bone cement main body and the second metal Inside the prosthesis contact part, the Spacer tibial side is also provided with a cavity structure for placing the first metal prosthesis contact part.

The above solution solves the problem of poor elbow joint movement effect to a certain extent, but there are still many shortcomings in this solution, such as the problem of unstable connection state.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above problems, and to provide a multifunctional elbow joint spacer with reasonable design and stable connection state.

In order to achieve the above object, the present invention adopts the following technical solutions: the multifunctional elbow joint spacer comprises a humeroulnar joint bone cement, a humeroulnar joint bone cement, a proximal radioulnar joint bone cement and a humeroradial joint bone cement. The cement bodies correspond to each other, the end of the humeroulnar joint bone cement body is covered with a cushion layer, the proximal radioulnar joint bone cement body and the humeroradial joint bone cement body are respectively connected with a mounting seat body through a buckle mechanism. The body is embedded in the proximal radioulnar joint bone cement body and the humeroradial joint bone cement body and fixed with a wear-resistant layer, and the wear-resistant layer is coated on the proximal radioulnar joint bone cement body and the outside of the humeroradial joint bone cement body. A locking mechanism is arranged between the wear-resistant layer and the mounting seat body. The wear-resistant layer is opposite to the cushion layer, wherein the wear-resistant layer is connected and fixed with the bone cement body through the mounting seat body and the locking mechanism, wherein a buckle mechanism is provided between the mounting seat body and the bone cement body, thereby improving the connection of the spacer stability.

In the above-mentioned multifunctional elbow joint spacer, the mounting seat body includes a tapered main seat body and an auxiliary seat body connected with the main seat body, a proximal radioulnar joint bone cement body and a humeroradial joint bone cement body end There is an installation groove for the installation seat body to be inserted into and fit with it, the outer side of the main seat body is provided with a reinforcing rib extending to the outer side of the auxiliary seat body, and the cross-section of the reinforcing rib is V-shaped. In the mounting seat body, the main seat body is matched with the auxiliary seat body, and has a larger contact area and clamping stability with the bone cement body.

In the above-mentioned multifunctional elbow joint spacer, the buckle mechanism includes a buckle groove arranged inside the installation groove, the installation seat body is installed with a buckle through the telescopic mechanism, the buckle is buckled with the buckle groove, and the lower end of the installation seat body is provided with a buckle. The sealing ring is made of elastic material, and the bottom of the installation groove is provided with a ring-shaped sealing groove which is pressed and fixed with the sealing ring. The buckle mechanism can lock and fix the mounting seat body and the bone cement body, wherein the sealing ring and the sealing groove improve the sealing performance between the end of the mounting seat body and the bottom of the mounting groove.

In the above-mentioned multifunctional elbow joint spacer, the telescopic mechanism includes a telescopic cavity provided inside the mounting base, the telescopic cavity is communicated with a telescopic groove provided on the mounting base, the buckle is slidably installed in the telescopic groove, and the telescopic cavity is connected to the telescopic groove. The filling holes extending along the vertical axis direction of the center of the mounting base are communicated, the side of the mounting base is provided with a number of positioning holes communicating with the expansion cavity, and the inner side of the mounting groove is provided with arc-shaped positioning grooves corresponding to the positioning holes one-to-one. The telescopic mechanism fills the filling hole and the telescopic cavity with slurry, so that the buckle is ejected to ensure the stability of the buckle mechanism, and the positioning hole and the positioning groove cooperate to form multiple positioning points to avoid the displacement of the mounting base relative to the mounting groove.

In the above-mentioned multifunctional elbow joint spacer, the locking mechanism includes a K-wire connected to the wear-resistant layer, the K-wire has a first locking portion and a second locking portion that are bent relative to each other, and the mounting seat is connected to the wear-resistant layer. The opposite end of the wear-resistant layer is provided with a locking hole for inserting the Kirschner wire, the first locking portion of the Kirschner wire is connected with the wear-resistant layer, and the second locking portion extends outward through the mounting seat body relative to the mounting seat body . The Kirschner wire in the locking mechanism makes the wear-resistant layer and the mounting seat body have better locking stability, and the Kirschner wire passes through the mounting seat body and is inserted into the bone cement body, which has a better fixing effect.

In the above-mentioned multifunctional elbow joint spacer, the humeroulnar joint bone cement body, the proximal radioulnar joint bone cement body and the humeroradial joint bone cement body respectively have a connecting seat body and a bone cement main body, and the connecting seat body and the bone A connecting frame component is arranged between the cement main body parts, and a covering component is arranged between the connecting seat body and the outer side of the bone cement main body part. The connection seat and the main part of the bone cement cooperate to realize the cooperation and fixation of the bone cement body and the bone, and the outer covering component effectively prolongs the service life of the bone cement body.

In the above-mentioned multifunctional elbow joint spacer, the connecting seat body includes a connecting handle and a connecting plate arranged at the end of the connecting handle. The connecting medulla needle extends outward in the direction, and the side surface of the connecting handle is provided with a number of connecting holes along the axis direction, and the distance between the connecting holes gradually decreases from the end of the connecting handle toward the end close to the connecting plate. The connecting plate includes a main plate body, and the main plate body and the The opposite side of the connecting handle has a conical surface structure, an arc-shaped transition portion is arranged at the junction between the outer side of the main disc body and the connecting handle, the side of the main disc body away from the connecting handle is a concave structure, and the edge of the main disc body is provided with a peripheral edge. To the surrounding connecting edge, the width of one side of the connecting edge is greater than the width of the other side. The connecting handle of the connecting seat body has good cooperation stability with the bone, which is convenient for surgical installation.

In the above-mentioned multifunctional elbow joint spacer, the connecting frame assembly includes a support frame disposed on the opposite side of the main body and the bone cement main body, and the support frame is a column structure and is arranged equidistantly along the edge of the main body. , the side of the support frame is provided with a number of through support holes in the axial direction, the support holes between the support frames are provided with support bars, the support bars are woven into a grid structure, the support frames are divided into long brackets and short brackets, long brackets Spaced from short brackets. The connecting frame assembly acts as a stable connection to the main part of the bone cement, and can provide a large tightening force.

In the above-mentioned multifunctional elbow joint spacer, the bone cement main body includes a base body directly connected to the connection base and a joint body connected to the base body and formed by 3D printing, and the covering component includes titanium covering the outside of the base body and the joint body. The alloy layer, the cushion layer and the wear-resistant layer are made of polyethylene materials. The wear-resistant layer is coated with an adhesion layer between the bone cement of the proximal radioulnar joint and the humeroradial joint. The edge of the wear-resistant layer is provided with a limited position The proximal radioulnar joint bone cement body and the outer side of the humeroradial joint bone cement body are circumferentially arranged with limit grooves that are clamped to the limit strips, and colloid is filled between the cushion layer and the wear-resistant layer. The adhesion layer fills the gap between the wear-resistant layer and the bone cement body to ensure the fit effect, and the limit strip and the limit groove are clamped, so that the edge of the wear-resistant layer and the bone cement body have a better fixing effect. The cushion layer and the wear-resistant layer have better buffering and lubricating effects to ensure the flexibility of the joint. The main part of the bone cement adopts a prefabricated matrix and a joint body that is 3D printed on the matrix. Select the size and specifications according to your needs to obtain better performance. It is comfortable to use and meets the replacement needs of different functional joints.

In the above-mentioned multifunctional elbow joint spacer, the inner side of the cushion is provided with grid-like positioning ribs, the end of the humeral and ulnar joint bone cement body is provided with positioning grooves that engage with the positioning ribs, and the cushion is provided with radial positioning ribs. The first hinge part opposite the end of the proximal ulna joint bone cement body and the second hinge part opposite to the humeroradial joint bone cement body, the outer side of the humeroulnar joint bone cement body and the radioulnar proximal joint bone cement body and the humeroradial joint An artificial ligament is connected between the bone cement bodies, and the end of the artificial ligament is connected and fixed with the humerulnar joint bone cement body, the proximal radioulnar joint bone cement body and the humeroradial joint bone cement body through threaded connectors, and an arc is arranged on the inner side of the cushion. The end of the humeral and ulnar joint bone cement body is provided with an arc-shaped depression that is pressed against the arc-shaped bulge, and a cavity is left between the arc-shaped bulge and the arc-shaped depression. The artificial ligament replaces the conventional articulated connection, so that the joint has better rotational flexibility.

Compared with the prior art, the present invention has the advantages that the wear-resistant layer covered by the end of the bone cement body is connected with the mounting seat body through a locking mechanism, and a buckle mechanism is arranged between the mounting seat body and the bone cement body, Thus, the stability of the installation and connection of the spacer is improved; the telescopic mechanism is filled with slurry to make the mounting seat body and the bone cement body fastened and fixed, which can effectively block the gap; the main part of the bone cement is formed by 3D printing , the specifications can be adjusted according to the actual situation to meet the space requirements of different functional joints.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural cross-sectional view of the bone cement main body part of the present invention;

3 is a partial cross-sectional view of the bone cement main body of the present invention;

4 is a partial cross-sectional view of the bone cement main body of the present invention;

Fig. 5 is the partial sectional view of the humerus and ulna joint bone cement body of the present invention;

Fig. 6 is the structural sectional view of the connecting seat of the present invention;

In the figure, the humeroulnar joint bone cement body 1, the bone cement main body 11, the base body 12, the joint body 13, the cushion layer 14, the arc-shaped convex part 141, the arc-shaped depression part 142, the positioning rib 15, the positioning groove 16 , the first hinge part 17, the second hinge part 18, the artificial ligament 19, the proximal radioulnar joint bone cement body 2, the connecting frame assembly 21, the support frame 22, the long frame 221, the short frame 222, the support hole 23, the support bar 24. The humeroradial joint bone cement body 3, the covering component 31, the buckle mechanism 4, the buckle groove 41, the buckle 42, the sealing ring 43, the sealing groove 44, the mounting seat body 5, the main seat body 51, the auxiliary seat body 52 , installation slot 53, reinforcement rib 54, positioning hole 55, positioning slot 56, wear-resistant layer 6, limit bar 61, limit slot 62, locking mechanism 7, K-wire 71, first locking part 72, Two locking parts 73, locking holes 74, telescopic mechanism 8, telescopic cavity 81, telescopic groove 82, filling hole 83, connecting base 9, connecting handle 91, connecting disc 92, connecting needle 93, connecting hole 94, main The disc body 95 , the arc-shaped transition portion 96 , and the connecting edge 97 .

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figure 1-6, the multifunctional elbow joint spacer includes a humeroulnar joint bone cement body 1, a humerulnar joint bone cement body 1, a proximal radioulnar joint bone cement body 2, and a humeroradial joint bone cement body 3. Corresponding to each other, the end of the humeroulnar joint bone cement body 1 is covered with a cushion layer 14, and the proximal radioulnar joint bone cement body 2 and the humeroradial joint bone cement body 3 are respectively connected with a mounting seat through a buckle mechanism 4. Body 5, the mounting seat body 5 is embedded in the proximal radioulnar joint bone cement body 2 and the humeroradial joint bone cement body 3 and is fixed with a wear-resistant layer 6, and the wear-resistant layer 6 is wrapped in the proximal radioulnar joint bone cement body 2 And on the outer side of the end of the humeroradial joint bone cement body 3 , a locking mechanism 7 is arranged between the wear-resistant layer 6 and the mounting seat body 5 . The humeroulnar joint bone cement body 1, the proximal radioulnar joint bone cement body 2 and the humeroradial joint bone cement body 3 constitute the main body of the spacer, and the end of the spacer is connected with a wear-resistant layer 6 fitted to it through a mounting seat body 5 , the locking mechanism 7 realizes the locking and fixing of the wear-resistant layer 6, the mounting seat body 5 and the bone cement body.

Specifically, the mounting seat body 5 includes a tapered main seat body 51 and an auxiliary seat body 52 connected to the main seat body 51 . The mounting groove 53 for the mounting base 5 to be inserted into and fit therewith has a reinforcing rib 54 extending to the outside of the secondary base 52 on the outside of the main base 51 , and the cross-section of the reinforcing rib 54 is V-shaped. The main seat body 51 is connected with the auxiliary seat body 52 as a whole, and the reinforcing ribs 54 on the outside thereof are symmetrically arranged relative to the center thereof,

In depth, the buckle mechanism 4 includes a buckle groove 41 arranged on the inner side of the installation groove 53 , the installation base 5 is installed with a buckle 42 through the telescopic mechanism 8 , the buckle 42 is buckled with the buckle groove 41 , and the lower end of the installation base 5 is provided with a buckle 42 . For the sealing ring 43 made of elastic material, the bottom of the installation groove 53 is provided with an annular sealing groove 44 which is pressed and fixed with the sealing ring 43 . The buckle 42 protrudes from the mounting seat body 5 and is buckled with the buckle groove 41 to realize the connection and locking of the mounting seat body 5 and the mounting groove 53. seal.

Further, the telescopic mechanism 8 includes a telescopic cavity 81 disposed inside the mounting base 5 , the telescopic cavity 81 communicates with the telescopic groove 82 provided on the mounting base 5 , the buckle 42 is slidably installed in the telescopic groove 82 , and the telescopic cavity 81 is connected to the telescopic groove 82 . The filling hole 83 extending along the vertical axis direction of the center of the mounting seat body 5 is connected to each other. The side surface of the mounting seat body 5 is provided with a number of positioning holes 55 that communicate with the telescopic cavity 81 . Arc-shaped positioning groove 56 . The telescopic cavity 81 of the telescopic mechanism 8 is filled with slurry, so that the buckle 42 is pushed out. At the same time, the slurry exuded from the gap is condensed to further improve the fixing and sealing effect, and the positioning hole 55 and the positioning groove 56 are filled with slurry. After condensation, several positioning nodes are formed to prevent the mounting base 5 from loosening and dislocating relative to the mounting groove 53 .

In addition, the locking mechanism 7 includes a K-wire 71 connected to the wear-resistant layer 6 , and the K-wire 71 has a first locking portion 72 and a second locking portion 73 that are bent relative to each other. The opposite end of the wear-resistant layer 6 is provided with a locking hole 74 for inserting the K-wire 71. The first locking portion 72 of the K-wire 71 is connected to the wear-resistant layer 6, and the second locking portion 73 passes through the mounting seat body. 5 extends outward relative to the mounting seat body 5 . The K-wire 71 in the locking mechanism 7 is connected and fixed with the wear-resistant layer 6, and passes through the locking hole 74 of the mounting base 5 to realize the locking and fixing of the wear-resistant layer 6 and the mounting base 5. The first locking portion 72 and the second locking portion 73 are bent relative to each other, and are connected and fixed after being inserted into the bone cement body.

Further, the humeroulnar joint bone cement body 1, the proximal radioulnar joint bone cement body 2 and the humeroradial joint bone cement body 3 respectively have a connecting seat body 9 and a bone cement main body portion 11, and the connecting seat body 9 and the bone cement main body are connected. A connecting frame assembly 21 is disposed between the parts 11 , and a covering assembly 31 is disposed between the connecting seat 9 and the outer side of the bone cement main body part 11 . The bone cement main body 11 cooperates with the connecting frame assembly 21 to realize the formation of the humerulnar joint bone cement body 1, the proximal radioulnar joint bone cement body 2 and the humeroradial joint bone cement body 3. play a protective role.

At the same time, the connecting base 9 includes a connecting handle 91 and a connecting plate 92 disposed at the end of the connecting handle 91. The connecting handle 91 and the connecting plate 92 are integrally formed. The extended connecting medulla needle 93 has a number of connecting holes 94 on the side of the connecting handle 91 along the axis direction. The spacing between the connecting holes 94 gradually decreases from the end of the connecting handle 91 toward the end close to the connecting plate 92. The connecting plate 92 includes a main body 95 The opposite side of the main disc body 95 and the connecting handle 91 has a conical surface structure, the outer side of the main disc body 95 and the connecting handle 91 are provided with an arc transition portion 96, and the side of the main disc body 95 away from the connecting handle 91 is concave Structure, the edge of the main plate body 95 is provided with a connecting edge 97 that surrounds in the circumferential direction, and the width of one side of the connecting edge 97 is greater than the width of the other side. The connecting handle 91 is fitted or plugged with the bone, the connecting hole 94 on the side thereof is relatively fixed with the bone through the connecting piece, the connecting pin 93 passes through the bone, and the connecting plate 92 is used for connecting with the bone cement main body 11, as required. A suitable bone cement main body 11 is prefabricated.

It can be seen that the connecting frame assembly 21 includes a supporting frame 22 disposed on the opposite side of the main plate body 95 and the bone cement main body 11 . The supporting frame 22 is a column structure and is equidistantly arranged along the edge of the main plate body 95. The supporting frame A number of through support holes 23 are opened on the side of the 22 along the axial direction. The support holes 23 between the support frames 22 are provided with support bars 24. The support bars 24 are woven into a grid structure. The support frames 22 are divided into long supports 221 and 22. The short bracket 222, the long bracket 221 and the short bracket 222 are arranged at intervals. The support frame 22 is fixed with the main plate body 95, it is evenly arranged near the edge of the main plate body 95, it is inserted into the bone cement main body part 11, and the meshes woven by the support bars 24 are raised to the bone cement main body. The contact area of the bone cement main body 11 and the connection nodes can be avoided, so as to avoid the loosening and separation of the bone cement main body part 11 and the main disc body 95 .

Obviously, the bone cement main body 11 includes a base body 12 that is directly connected to the connection base 9 and a joint body 13 that is connected to the base body 12 and is 3D printed. The covering component 31 includes a titanium alloy covering the outside of the base body 12 and the joint body 13 layer, the cushion layer 14 and the wear-resistant layer 6 are made of polyethylene materials, and the wear-resistant layer 6 is coated with an adhesion layer between the bone cement body 2 of the proximal radioulnar joint and the bone cement body 3 of the humeroradial joint. A limit bar 61 is arranged at the mouth, and the outer side of the proximal radioulnar joint bone cement body 2 and the humeroradial joint bone cement body 3 are circumferentially arranged with a limit groove 62 that is engaged with the limit bar 61, and the cushion layer 14 is connected to the wear-resistant material. Colloid is filled between the layers 6 . The inner side of the wear-resistant layer 6 is provided with an adhesion layer, which maintains a relatively high fit with the bone cement body, and at the same time plays a role in blocking the filling hole 83 . The limit bar 61 is combined with the limit groove 62 to avoid the separation of the wear-resistant layer 6 after long-term use. The colloid is used as a joint filler to ensure the lubricity between the cushion layer 14 and the wear-resistant layer 6, so that the humeral and ulnar joint bone cement is The body 1 can rotate flexibly relative to the proximal radioulnar joint bone cement body 2 and the humeroradial joint bone cement body 3 . The joint body 13 is printed and formed on the base body 12 of the bone cement main body 11, and then the base body 12 is connected with the main body 95. The titanium alloy layer has good affinity with the body tissue, and the cushion layer 14 and the wear-resistant layer 6 are selected. The polyethylene material has a long service life and lubricity, and the colloid between them realizes buffering.

Preferably, the inner side of the cushion layer 14 is provided with a grid-like positioning rib 15, the end of the humeral and ulnar joint bone cement body 1 is provided with a positioning groove 16 that engages with the positioning rib 15, The first hinge part 17 opposite to the end of the articular bone cement body 2 and the second hinge part 18 opposite to the humeroradial joint bone cement body 3; An artificial ligament 19 is connected between the humeroradial joint bone cement body 3, and the end of the artificial ligament 19 is connected with the humeroulnar joint bone cement body 1, the proximal radioulnar joint bone cement body 2 and the humeroradial joint bone cement body 3 through a screw connection. The connection is fixed, the inner side of the cushion layer 14 is provided with an arc-shaped convex portion 141, and the end of the humeral and ulnar joint bone cement body 1 is provided with an arc-shaped concave portion 142 that is pressed against the arc-shaped convex portion 141. A cavity is left between the portion 141 and the arc-shaped recessed portion 142 . The cushion layer 14 is connected with the humeral and ulnar joint bone cement body 1, and the first hinge part 17 and the second hinge part 18 realize the articulation connection, and the artificial ligament 19 on the outside replaces the original hinge shaft, which imitates the normal elbow joint movement of the human body, Reduce discomfort.

To sum up, the principle of this embodiment is that the wear-resistant layer 6 is opposite to the cushion layer 14 , wherein the wear-resistant layer 6 is connected and fixed with the bone cement body through the mounting base 5 and the locking mechanism 7 , wherein the mounting base 5 is connected to the bone cement body. A buckle mechanism 4 is arranged between the bone cement bodies, thereby improving the connection stability of the spacer.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definitions of the appended claims range.

Although the humeroulnar joint bone cement body 1, the bone cement main body part 11, the base body 12, the joint body 13, the cushion layer 14, the arc-shaped convex part 141, the arc-shaped depression part 142, the positioning ribs 15, Positioning groove 16, first hinge part 17, second hinge part 18, artificial ligament 19, proximal radioulnar joint bone cement body 2, connecting frame assembly 21, support frame 22, long bracket 221, short bracket 222, support hole 23. Support strip 24, humeroradial joint cement body 3, covering component 31, buckle mechanism 4, buckle groove 41, buckle 42, sealing ring 43, sealing groove 44, mounting seat body 5, main seat body 51, Auxiliary seat body 52, installation groove 53, reinforcing rib 54, positioning hole 55, positioning groove 56, wear-resistant layer 6, limit bar 61, limit groove 62, locking mechanism 7, K-wire 71, first locking part 72, second locking part 73, locking hole 74, telescopic mechanism 8, telescopic cavity 81, telescopic slot 82, filling hole 83, connecting seat 9, connecting handle 91, connecting disc 92, connecting needle 93, connecting Terms such as hole 94, main disc body 95, arcuate transition portion 96, connecting edge 97, etc., do not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; it is contrary to the spirit of the present invention to interpret them as any kind of additional limitation.

Claims (10)

1. A multifunctional elbow joint spacer comprises a humeral joint cement body (1), wherein the humeral joint cement body (1), a proximal radius joint cement body (2) and a brachioradialis joint cement body (3) correspond to each other in pairs, it is characterized in that the head of the ulnar humerus joint cement body (1) is coated with a cushion layer (14), the cement body (2) of the proximal radioulnar joint and the cement body (3) of the brachioradialis joint are respectively connected with an installation seat body (5) through a buckling mechanism (4), the mounting base body (5) is embedded into the cement body (2) of the proximal radioulnar joint and the cement body (3) of the brachioradialis joint and is fixed with a wear-resistant layer (6), the wear-resistant layer (6) is coated outside the ends of the proximal radioulnar joint cement body (2) and the brachioradialis joint cement body (3), and a locking mechanism (7) is arranged between the wear-resistant layer (6) and the mounting base body (5).

2. The multifunctional elbow joint spacer as claimed in claim 1, wherein the mounting seat body (5) comprises a conical main seat body (51) and an auxiliary seat body (52) connected with the main seat body (51), the ends of the radial proximal joint cement body (2) and the brachioradialis joint cement body (3) are provided with mounting grooves (53) for the mounting seat body (5) to insert and be attached to, the outer side of the main seat body (51) is provided with a reinforcing rib (54) extending to the outer side of the auxiliary seat body (52), and the section of the reinforcing rib (54) is V-shaped.

3. The multifunctional elbow joint spacer as claimed in claim 2, wherein the fastening mechanism (4) comprises a fastening groove (41) disposed inside the mounting groove (53), the mounting seat (5) is provided with a buckle (42) via a telescopic mechanism (8), the buckle (42) is fastened with the fastening groove (41), the lower end of the mounting seat (5) is provided with a sealing ring (43) made of elastic material, and the bottom of the mounting groove (53) is provided with a ring and is compressed and fixed with the sealing ring (43) to form a sealing groove (44).

4. The multifunctional elbow joint spacer as claimed in claim 3, wherein the telescoping mechanism (8) comprises a telescoping cavity (81) arranged inside the mounting base (5), the telescoping cavity (81) is communicated with a telescoping groove (82) arranged on the mounting base (5), the buckle (42) is slidably mounted in the telescoping groove (82), the telescoping cavity (81) is communicated with a filling hole (83) extending along the central vertical axis direction of the mounting base (5), a plurality of positioning holes (55) communicated with the telescoping cavity (81) are formed in the side surface of the mounting base (5), and positioning grooves (56) which correspond to the positioning holes (55) one by one and are arc-shaped are formed in the inner side of the mounting groove (53).

5. The multifunctional elbow joint spacer as claimed in claim 4, wherein the locking mechanism (7) comprises a Kirschner wire (71) connected with the wear layer (6), the Kirschner wire (71) has a first locking portion (72) and a second locking portion (73) which are bent relatively, a locking hole (74) for inserting the Kirschner wire (71) is opened at the end of the mounting body (5) opposite to the wear layer (6), the first locking portion (72) of the Kirschner wire (71) is connected with the wear layer (6), and the second locking portion (73) passes through the mounting body (5) and extends outwards relative to the mounting body (5).

6. The multifunctional elbow spacer as claimed in claim 1, wherein the ulnar joint cement body (1), the proximal radioulnar joint cement body (2) and the radioradial joint cement body (3) are respectively provided with a connecting seat body (9) and a bone cement main body part (11), a connecting frame assembly (21) is arranged between the connecting seat body (9) and the bone cement main body part (11), and a cladding assembly (31) is arranged between the connecting seat body (9) and the outer side of the bone cement main body part (11).

7. The multifunctional elbow joint spacer of claim 6, wherein the connection seat body (9) comprises a connection handle (91) and a connection disc (92) arranged at the end of the connection handle (91), the connection handle (91) and the connection disc (92) are integrally formed, the cross section of the connection handle (91) is in a flat arc structure and is provided with a connection broach (93) extending outwards along the axis direction, the side surface of the connection handle (91) is provided with a plurality of connection holes (94) along the axis direction, the distance between the connection holes (94) is gradually reduced from the end of the connection handle (91) to one end close to the connection disc (92), the connection disc (92) comprises a main disc body (95), one side of the main disc body (95) opposite to the connection handle (91) is in a conical surface structure, and an arc transition part (96) is arranged at the joint of the outer side of the main disc body (95) and the connection handle (91), the main tray body (95) keep away from one side of connecting handle (91) and be sunk structure, main tray body (95) limit mouth department be provided with along circumference encircleed connection limit (97), connection limit (97) one side width be greater than the opposite side width.

8. The multifunctional elbow joint spacer of claim 7 wherein the connecting frame assembly (21) comprises a support frame (22) disposed on one side of the main body (95) opposite to the bone cement body (11), the support frame (22) is of a column structure and is arranged along the equal distance near the rim of the main body (95), a plurality of through support holes (23) are formed in the side surface of the support frame (22) along the axial direction, support bars (24) are arranged in the support holes (23) between the support frames (22), the support bars (24) are woven into a grid structure, the support frame (22) is divided into long supports (221) and short supports (222), and the long supports (221) and the short supports (222) are arranged at intervals.

9. The multifunctional elbow joint spacer according to claim 6, wherein the bone cement body (11) comprises a base body (12) directly connected with the connecting seat body (9) and a joint body (13) connected with the base body (12) and formed by 3D printing, the cladding component (31) comprises a titanium alloy layer covering the outer sides of the base body (12) and the joint body (13), the cushion layer (14) and the wear layer (6) are made of polyethylene materials, an adhesion layer is coated between the wear layer (6) and the proximal radius joint cement body (2) and the humeral joint cement body (3), a limiting strip (61) is arranged at the edge of the wear layer (6), and a limiting groove (62) clamped with the limiting strip (61) is circumferentially arranged at the outer sides of the proximal radius joint cement body (2) and the humeral joint cement body (3), and colloid is filled between the cushion layer (14) and the wear-resistant layer (6).

10. The multifunctional elbow joint spacer as claimed in claim 1, wherein a latticed positioning rib (15) is arranged on the inner side of the cushion layer (14), a positioning groove (16) engaged with the positioning rib (15) is arranged at the end of the ulnar joint cement body (1), the cushion layer (14) is provided with a first articulated part (17) opposite to the end of the ulnar joint cement body (2) on the proximal radius side and a second articulated part (18) opposite to the ulnar joint cement body (3), an artificial ligament (19) is connected between the outer side of the ulnar joint cement body (1) and the ulnar joint cement body (2) on the proximal radius side and the ulnar joint cement body (3), and the end of the artificial ligament (19) is connected and fixed with the ulnar joint cement body (1), the ulnar joint cement body (2) on the proximal radius side and the ulnar joint cement body (3) through a threaded connection, the inner side of the cushion layer (14) is provided with an arc-shaped bulge part (141), the end of the ulnar humerus joint cement body (1) is provided with an arc-shaped concave part (142) which is tightly attached to and pressed against the arc-shaped bulge part (141), and a cavity is reserved between the arc-shaped bulge part (141) and the arc-shaped concave part (142).

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