Artificial shoulder joint liner

Abstract

The application is suitable for the technical field of artificial shoulder joint, and provides an artificial shoulder joint liner, which comprises a liner prosthesis, one end of the liner prosthesis is inserted into a scapula body, the other end of the liner prosthesis is connected with a humeral head, the liner prosthesis is composed of a base, a bearing part and an edge part, a scapula cutting surface is cut on the scapula body, a blind hole is formed on the scapula cutting surface, a plug rod matched with the blind hole is arranged on the left side wall of the base, and the outer wall of the plug rod is fixedly connected with arc-shaped blocks in a symmetrical mode. The base and the scapula are connected through the plug rod and the arc-shaped blocks on the base and the blind hole on the scapula in a plug-in and rotation mode, the base on the liner prosthesis is prevented from slipping off the scapula, and the liner prosthesis is fixedly connected with the mechanical mode of the positioning rod and the lock rod one, so that the insecure phenomenon of the traditional adhesive connection is avoided; and the edge part is adjustable, so that the width of the liner prosthesis is adjusted, and the liner prosthesis is most suitable for the shoulder joint of a patient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of artificial shoulder joint, more particularly, it relates to an artificial shoulder joint liner. BACKGROUND

[0002] The rotator cuff is a group of tendons that surround the head of the humerus, and is a musculo-tendinous structure that connects the scapula and the humeral head, the front of the humeral head is the infraspinatus tendon, the upper part is the supraspinatus tendon, and the rear is the infraspinatus tendon and the teres minor tendon, which is attached to the greater tuberosity of the humerus and the edge of the anatomical neck of the humerus, and its inner surface is closely connected with the joint capsule, and its outer surface is the subdeltoid bursa; these tendons not only have the functions of internal rotation, external rotation and lifting movement of the shoulder joint; more importantly, these tendons stabilize the humeral head on the glenoid to maintain the stability of the shoulder joint, and can prevent the humeral head from moving upward to hit the acromion to cause pain; therefore, the rotator cuff plays an extremely important role in maintaining the stability of the shoulder joint and in the movement of the shoulder joint.

[0003] Rotator cuff injury is the most common cause of shoulder pain, and its treatment methods include conservative treatment, arthroscopic cleaning, rotator cuff repair, subacromial decompression, acromioplasty, long head tendon resection or fixation, tendon transposition, upper joint capsule reconstruction, subacromial balloon, shoulder joint replacement, etc.; subacromial balloon technology is used for the treatment of patients with massive rotator cuff injury, which uses a balloon made of polylactic acid-polyglycolide material, which is placed in the space between the acromion and the humeral head under arthroscopy, and its mechanism is to reduce the upward movement of the humerus during abduction, change the pressure distribution under the acromion, reduce friction, and form a fibrous interval after degradation.

[0004] At present, the subacromial balloon technology has the following problems:

[0005] At present, the liner is mainly composed of three parts, a base, a bearing part and an edge part, wherein the connection between the base and the scapula is completed by a direct insertion type of insertion, which makes the base easily slide off the scapula, and the connection between the base and the bearing part is completed by adhesion, which has poor adhesion strength, thereby affecting the use effect of the liner, and the connection between the bearing part and the edge part is fixed, which has poor adaptability, so that the width of the liner cannot be adjusted, and the liner cannot well fit the patient. SUMMARY

[0006] In view of the deficiencies of the prior art, the purpose of the present application is to provide an artificial shoulder joint liner which is connected to the scapula by the insertion and rotation of the insertion rod and the arc-shaped block on the base into the blind hole on the scapula, thereby avoiding the base of the liner prosthesis from sliding off the scapula and avoiding the mechanical fixation of the positioning rod and the lock rod, thereby avoiding the insecure adhesion of the traditional connection, and the adjustable edge part, thereby adjusting the width of the liner prosthesis and making it most suitable for the patient's shoulder joint.

[0007] To achieve the above object, the present application provides the following technical scheme:

[0008] The artificial shoulder joint liner comprises a liner prosthesis, one end of the liner prosthesis is inserted into a scapula body, the other end of the liner prosthesis is connected with a humeral head, the liner prosthesis is composed of a base, a bearing component and an edge component, and a scapula cutting surface is cut on the scapula body.

[0009] A blind hole is formed in the scapula cutting surface, a left side wall of the base is provided with an insertion rod matched with the blind hole, the outer wall of the insertion rod is fixedly connected with arc-shaped blocks in a symmetrical manner, the inner wall of the blind hole is symmetrically provided with sliding grooves I matched with the arc-shaped blocks, and the inner wall of the blind hole is symmetrically provided with circular arc grooves in communication with the blind hole.

[0010] A recess is formed in the right side wall of the base, four positioning holes are symmetrically formed in the inner bottom wall of the recess, the inside of the base is symmetrically provided with penetrating screw holes in an annular array and in communication with the positioning holes, a lock rod I extending into the positioning hole is slidably arranged in each screw hole, a sliding block plate is slidably connected to the inner peripheral side surface of the screw hole, a spring is fixedly connected between the sliding block plate and the lock rod I, a screw column threadedly connected with the screw hole is rotatably connected to one side surface of the sliding block plate, and the gap between the screw column and the base is filled with sealing glue.

[0011] The left side wall of the bearing component is symmetrically fixedly connected with positioning rods matched with each positioning hole at the position deviated from the center, the outer wall of the bearing component is symmetrically provided with guide grooves, a plurality of sliding grooves II are formed in the inside of each guide groove, the outer wall of the bearing component is slidably provided with the edge component, the outer wall of the edge component is symmetrically slidably provided with button plates, the opposite side walls of the two button plates are fixedly connected with connecting rods, the opposite end portions of the two connecting rods are fixedly connected with wedge blocks, the outer walls of the two connecting rods are fixedly connected with lock rods II in abutting contact with the inner walls of the sliding grooves II, and the right side wall of the edge component is provided with a prosthesis glenoid, and the humeral head is hingedly arranged with the prosthesis glenoid.

[0012] The base is made of PEEK material, and the outer surface of the PEEK material of the base is coated with an HA coating.

[0013] The bearing component is made of PEEK material.

[0014] The edge component is made of high molecular polyethylene material.

[0015] The outer wall of each positioning rod is provided with a through hole matched with the lock rod one, and the outer wall of the end of each lock rod one is provided with a guide inclined wall matched with the positioning rod.

[0016] The inner bottom wall of each chute two is fixedly connected with a resisting rod matched with the wedge block, and the inner side wall of each chute two is provided with an inclined clamping groove matched with the lock rod two.

[0017] The top end of each resisting rod is circular.

[0018] The left side wall of the base is in contact with the surface of the scapula body after osteotomy.

[0019] The right side wall of the bearing part is in contact with the humeral head, one end of the bearing part is embedded in the interior of the base, and the other end of the bearing part is embedded in the interior of the edge part.

[0020] The advantages of the present application are:

[0021] 1. The base and the scapula are connected through the insertion and rotation of the insertion rod and the arc-shaped block on the base into the blind hole on the scapula, avoiding the base on the liner prosthesis from slipping off the scapula.

[0022] 2. The positioning rod and the lock rod one are mechanically fixedly connected, avoiding the insecure phenomenon of traditional adhesive connection, and the adjustable edge part is used to adjust the width of the liner prosthesis, so that it is most suitable for the use of the patient's shoulder joint. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the natural shoulder joint of the present application.

[0024] Figure 2 It is an explosion view of the connection between the scapula body, the liner prosthesis and the humeral head in the present application.

[0025] Figure 3 It is a front planar structure perspective view. Figure 2

[0026] Figure 4 It is a schematic diagram of the sectional structure of the scapula.

[0027] Figure 5 It is an enlarged view of A in the present application. Figure 4

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the base in the present application.

[0029] Figure 7 ​​Fig. 4 is a right plan view of the base of the application.

[0030] Figure 8 Fig. 5 is a sectional view of the base of the application.

[0031] Figure 9 Fig. 6 is a sectional view of the bearing component of the application. Figure 8 Fig. 7 is an enlarged view of the portion B in Fig. 6.

[0032] Figure 10 Fig. 8 is a perspective view of the bearing component of the application.

[0033] Figure 11 Fig. 9 is a sectional view of the bearing component of the application.

[0034] Figure 12 Fig. 10 is a sectional view of the edge component of the application. Figure 11 Fig. 11 is an enlarged view of the portion C in Fig. 10.

[0035] Figure 13 Fig. 12 is a sectional view of the edge component of the application.

[0036] Figure 14 Fig. 13 is a sectional view of the edge component of the application. Figure 13 Fig. 14 is an enlarged view of the portion D in Fig. 13.

[0037] Fig. 1 is a schematic diagram of the scapula body; Fig. 2 is a schematic diagram of the glenoid cavity; Fig. 3 is a schematic diagram of the humeral head; Fig. 4 is a schematic diagram of the scapula cutting surface; Fig. 5 is a schematic diagram of the spacer prosthesis; Fig. 6 is a schematic diagram of the blind hole; Fig. 7 is a schematic diagram of the sliding groove I; Fig. 8 is a schematic diagram of the circular arc groove; Fig. 9 is a schematic diagram of the base; Fig. 10 is a schematic diagram of the bearing component; Fig. 11 is a schematic diagram of the insertion rod; Fig. 12 is a schematic diagram of the arc-shaped block; Fig. 13 is a schematic diagram of the recessed cavity; Fig. 14 is a schematic diagram of the positioning hole; Fig. 15 is a schematic diagram of the threaded hole; Fig. 16 is a schematic diagram of the spring; Fig. 17 is a schematic diagram of the first locking rod; Fig. 18 is a schematic diagram of the sliding block plate; Fig. 19 is a schematic diagram of the stud; Fig. 20 is a schematic diagram of the positioning rod; Fig. 21 is a schematic diagram of the guide groove; Fig. 22 is a schematic diagram of the second sliding groove; Fig. 23 is a schematic diagram of the abutting rod; Fig. 24 is a schematic diagram of the inclined clamping groove; Fig. 25 is a schematic diagram of the button plate; Fig. 26 is a schematic diagram of the connecting rod; Fig. 27 is a schematic diagram of the guide groove; Fig. 28 is a schematic diagram of the wedge block; Fig. 29 is a schematic diagram of the second locking rod; and Fig. 30 is a schematic diagram of the prosthesis glenoid cavity. DETAILED DESCRIPTION

[0038] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0039] It should be noted that all the technical and scientific terms used in the present application have the same meaning as that generally understood by the ordinary skilled in the art to which the present application belongs, unless otherwise specified.

[0040] In the present application, the orientation such as "upper, lower" is generally directed to the direction shown in the drawings or the vertical, perpendicular or gravity direction unless otherwise stated; similarly, for the convenience of understanding and description, "left, right" is generally directed to the left and right shown in the drawings; "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

[0041] Embodiment one

[0042] Please refer to Figures 1-14 The present application provides the following technical solutions:

[0043] The artificial shoulder joint liner comprises a liner prosthesis 5, one end of the liner prosthesis 5 is inserted into a scapula body 1, the other end of the liner prosthesis 5 is connected with a humeral head 3, the liner prosthesis 5 is composed of a base 51, a bearing component 52 and an edge component 53, a scapula cutting surface 4 is cut on the scapula body 1, a blind hole 41 is formed on the scapula cutting surface 4, a left side wall of the base 51 is provided with a plug rod 511 matched with the blind hole 41, the outer wall of the plug rod 511 is fixedly connected with arc-shaped blocks 512 in a symmetrical manner, the inner wall of the blind hole 41 is symmetrically provided with sliding grooves 42 matched with the arc-shaped blocks 512, and the inner wall of the blind hole 41 is symmetrically provided with circular arc grooves 43 communicated with the blind hole 41, and the circular arc grooves 43 are communicated with the sliding grooves 42.

[0044] The specific application of the present embodiment one is that the glenoid 2 on the scapula body 1 is removed, the blind hole 41, the sliding groove 42 and the circular arc groove 43 are drilled on the cutting surface, then the plug rod 511 and the arc-shaped blocks 512 on the base 51 are inserted along the blind hole 41 and the sliding groove 42, and the base 51 is counterclockwise rotated so that the arc-shaped blocks 512 are located in the sliding grooves 42, thereby completing the locking of the base 51 and avoiding the base 51 from being separated from the blind hole 41 on the scapula body 1.

[0045] Embodiment two

[0046] Please refer to Figures 1-14The embodiment two is improved based on the embodiment one, and specifically, the right side wall of the base 51 is provided with a concave cavity 513, four positioning holes 514 are symmetrically arranged on the inner bottom wall of the concave cavity 513, a plurality of penetrating threaded holes 515 in annular array are symmetrically arranged in the inner portion of the base 51 and communicate with the positioning holes 514, a lock rod one 517 extending into the inner portion of the positioning hole 514 is slidingly arranged in each threaded hole 515, a sliding block plate 518 is slidingly connected to the inner circumferential side of the threaded hole 515, a spring 516 is fixedly connected between the sliding block plate 518 and the lock rod one 517, a stud 519 threadedly connected with the threaded hole 515 is rotatably connected to one side of the sliding block plate 518, and the gap between the stud 519 and the base 51 is filled with sealing glue; the left side wall of the bearing component 52 is fixedly connected with a positioning rod 521 matched with each positioning hole 514 at positions deviated from the center, a through hole matched with the lock rod one 517 is formed in the outer wall of each positioning rod 521, a guide inclined wall matched with the lock rod one 517 is arranged on the end outer wall of each lock rod one 517, a plurality of guide grooves 522 are symmetrically formed in the outer wall of the bearing component 52, a plurality of sliding grooves two 523 are formed in the inner portion of each guide groove 522, an edge component 53 is slidingly arranged on the outer wall of the bearing component 52, a plurality of button plates 531 are symmetrically slidingly arranged on the outer wall of the edge component 53, a connecting rod 532 is fixedly connected to the opposite side wall of each button plate 531, a wedge block 534 is fixedly connected to the opposite end of each connecting rod 532, a lock rod two 535 in abutting contact with the inner wall of the sliding groove two 523 is fixedly connected to the outer wall of each connecting rod 532, a resisting rod 524 matched with the wedge block 534 is fixedly connected to the inner bottom wall of each sliding groove two 523, the top end of each resisting rod 524 is circularly arranged, an inclined clamping groove 525 matched with the lock rod two 535 is formed in the inner side wall of each sliding groove two 523, and a prosthetic glenoid 536 is arranged on the right side wall of the edge component 53.

[0047] The specific application of the second embodiment is that the positioning rod 521 on the bearing part 52 is inserted into the positioning hole 514 on the concave cavity 513, and the positioning rod 521 is extruded to contact the lock rod 517 during the insertion process. The positioning rod 521 moves along the guide inclined wall on the lock rod 517, and drives the lock rod 517 to move into the threaded hole 515. When the through hole on the positioning rod 521 is aligned with the lock rod 517, the lock rod 517 is driven to move into the through hole under the elastic force of the spring 516, thereby completing the locking of the positioning rod 521. The fixed connection by the mechanical mode effectively improves the firmness of the connection between the base 51 and the bearing part 52. Then, the button plate 531 on the edge part 53 is placed along the sliding groove two 523 on the bearing part 52, and the button plate 531 is pressed inward, driving the connecting rod 532, the wedge block 534 and the lock rod two 535 to move in the opposite direction. The wedge block 534 extrudes and contacts the abutment rod 524, and then drives the wedge block 534, the connecting rod 532 and the lock rod two 535 to move into the inclined clamping groove 525, thereby completing the locking of the lock rod two 535 and the connection of the edge part 53 and the bearing part 52. Through the actual use demand of the patient's shoulder joint, the edge part 53 is moved left and right, thereby completing the adjustment of the width of the gasket prosthesis 5, so that it is most suitable for the use of the patient's shoulder joint. The device can solve the problem of pressing down the humeral head in a large rotator cuff tear, and can replace technologies such as upper joint capsule reconstruction and subacromial balloon.

[0048] Embodiment three

[0049] Please refer to Figures 1-14 , the third embodiment is improved on the basis of the first embodiment. Specifically, the left side wall of the base 51 is in contact with the surface of the scapula body 1 after osteotomy. The base 51 is made of PEEK material. The outer surface of the PEEK material of the base 51 is coated with a HA coating. The bearing part 52 is made of PEEK material. The edge part 53 is made of high molecular polyethylene material.

[0050] The specific application of the third embodiment is that the HA coating on the outer surface of the PEEK material can promote healing with the subacromial surface, provide the possibility of connecting the implant and the acromion together, the polyurethane layer plays a main role in filling the joint gap, pressing down the humeral head, and the elastic characteristics also play a buffering role. It can also prevent body fluids from entering the inside of the gasket prosthesis 5, avoid the influence of human body fluids on the use process of the gasket prosthesis 5, protect the humeral head and acromion, further protect the tissue such as the rotator cuff or the humeral head below the implant, reduce the friction force, and increase the wear resistance.

[0051] Obviously, the above described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0052] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments consistent with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0053] It is to be noted that the terms "first", "second", and the like in the description and in the claims of this application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of the terms so termed is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of efficient operation in other than the order shown or described herein.

[0054] The preferred embodiments of the application have been described above with the specific details. Obviously, the above described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0055] The above described are only the preferred embodiments of the present application, the protection scope of the present application is not limited to the above described embodiments, all the technical solutions which belong to the idea of the present application should belong to the protection scope of the present application. It should be pointed out that, for the ordinary skilled in the art, several improvements and decorations without departing from the principle of the present application should be considered as the protection scope of the present application.

Claims

1. Artificial shoulder joint liner, comprising a liner prosthesis (5) which is inserted at one end into a scapula body (1) and which is connected at the other end to a humeral head (3), characterized in that: The liner prosthesis (5) is composed of a base (51), a bearing part (52) and an edge part (53), and a scapula cutting surface (4) is cut on the scapula body (1); A blind hole (41) is arranged on the scapula cutting surface (4), a left side wall of the base (51) is provided with a plug rod (511) matched with the blind hole (41), outer walls of the plug rod (511) are symmetrically and fixedly connected with arc blocks (512), inner walls of the blind hole (41) are symmetrically provided with sliding grooves I (42) matched with the arc blocks (512), and inner walls of the blind hole (41) are symmetrically provided with circular arc grooves (43) communicated with the blind hole (41), and the circular arc grooves (43) are communicated with the sliding grooves I (42); A concave cavity (513) is arranged on a right side wall of the base (51), inner bottom walls of the concave cavity (513) are symmetrically provided with four positioning holes (514), an inside of the base (51) is symmetrically provided with penetrating screw holes (515) in an annular array and communicated with the positioning holes (514), each of the screw holes (515) is slidably provided with a lock rod I (517) extending into the positioning hole (514), inner peripheral sides of the screw holes (515) are slidably connected with sliding block plates (518), the sliding block plates (518) and the lock rod I (517) are fixedly connected with springs (516), one side of the sliding block plate (518) is rotatably connected with a threaded stud (519) threadedly connected with the screw hole (515), and a gap between the threaded stud (519) and the base (51) is filled with sealing glue; Left side walls of the bearing part (52) are symmetrically and fixedly connected with positioning rods (521) matched with each of the positioning holes (514) at positions deviated from the center, outer walls of the bearing part (52) are symmetrically provided with guide grooves (522), each of the guide grooves (522) is provided with a plurality of sliding grooves II (523) in the inside, the outer wall of the bearing part (52) is slidably provided with the edge part (53), the outer wall of the edge part (53) is symmetrically slidably provided with button plates (531), opposite side walls of the two button plates (531) are fixedly connected with connecting rods (532), opposite ends of the two connecting rods (532) are fixedly connected with wedge blocks (534), outer walls of the two connecting rods (532) are fixedly connected with lock rods II (535) in abutting contact with inner walls of the sliding grooves II (523), and a right side wall of the edge part (53) is provided with a prosthesis glenoid (536), and the humeral head (3) is hingedly arranged with the prosthesis glenoid (536); Outer walls of each of the positioning rods (521) are provided with through holes matched with the lock rod I (517), and end outer walls of each of the lock rod I (517) are provided with guide inclined walls matched with the positioning rods (521); Inner bottom walls of each of the sliding grooves II (523) are fixedly connected with abutting rods (524) matched with the wedge blocks (534), and inner side walls of each of the sliding grooves II (523) are provided with inclined clamping grooves (525) matched with the lock rods II (535).

2. The artificial shoulder joint liner according to claim 1, characterized in that: The base (51) is made of PEEK material, and the outer surface of the PEEK material of the base (51) is coated with a HA coating.

3. The artificial shoulder joint liner of claim 2, wherein: The bearing component (52) is made of PEEK material.

4. The artificial shoulder joint liner of claim 3, wherein: The edge component (53) is made of high molecular polyethylene material.

5. The artificial shoulder joint liner of claim 4, wherein: The top end of each of the abutting rods (524) is circularly arranged.

6. The artificial shoulder joint liner of claim 5, wherein: The left side wall of the base (51) is in surface contact with the scapula body (1) after osteotomy.

7. The artificial shoulder joint liner according to claim 6, characterized in that: The right side wall of the bearing component (52) is in contact with the humeral head (3), one end of the bearing component (52) is embedded in the interior of the base (51), and the other end of the bearing component (52) is embedded in the interior of the edge component (53).

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