Modularized artificial shoulder joint replacement implantation structure

Abstract

The invention relates to the technical field of medical instruments, and discloses a modular artificial shoulder joint replacement implantation structure which comprises a shoulder glenoid assembly, a humerus head assembly, a humerus neck assembly and a humerus handle assembly, and the shoulder glenoid assembly, the humerus head assembly, the humerus neck assembly and the humerus handle assembly are detachably connected and converted. The shoulder glenoid assembly, the humerus head assembly, the humerus neck assembly and the humerus handle assembly can form a half-shoulder joint replacement structure, a full-shoulder joint replacement structure and a reverse-shoulder joint replacement structure through detachable connection and conversion, and a half-shoulder replacement system, a full-shoulder replacement system and a reverse-shoulder replacement system are integrated into one set of structure through modular design. All the components can be freely disassembled and converted, the links of research and development, testing and verification are reduced, the production cost and inventory pressure of enterprises are reduced, and therefore the expansibility and flexibility of shoulder joint replacement surgery are improved, and doctors can accurately match the components according to the specific illness state of a patient to meet the treatment requirements of different injury types.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a modular artificial shoulder joint replacement implant structure. Background Technology

[0002] Artificial shoulder joint replacement is mainly divided into three types: partial shoulder joint replacement, total shoulder joint replacement, and reverse shoulder joint replacement. In traditional shoulder joint replacement implants, partial shoulder, total shoulder, and reverse shoulder are all independent systems.

[0003] Currently, traditional shoulder replacement implant systems require independent development, testing, and validation, which significantly increases R&D and production costs and creates substantial inventory pressure. The independent system design complicates shoulder replacement surgery, reduces surgical flexibility, and prevents doctors from flexibly adjusting the implant structure according to the patient's condition. The implant needs to be replaced entirely during surgery, which prolongs the operation time, increases surgical risks and the incidence of complications, and is not conducive to the promotion and development of shoulder replacement surgery technology. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a modular artificial shoulder joint replacement implant structure that solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a modular artificial shoulder joint replacement implant structure, comprising a glenoid assembly, a humeral head assembly, a humeral neck assembly, and a humeral stem assembly, wherein the glenoid assembly, the humeral head assembly, the humeral neck assembly, and the humeral stem assembly are all detachably connected and interchangeable;

[0006] The glenoid assembly, humeral head assembly, humeral neck assembly, and humeral stem assembly can be disassembled, connected, and converted to form a hemi-shoulder joint replacement structure, a total shoulder joint replacement structure, and a reverse shoulder joint replacement structure, respectively.

[0007] Furthermore, the glenoid assembly includes a glenoid liner, bone screws, a positive shoulder glenoid pad, a negative shoulder glenoid pad, and a negative shoulder locking screw.

[0008] Furthermore, the shoulder liner is provided with nail holes, anti-slip grooves, arc-shaped grooves, and threaded structural holes that mate with the anti-shoulder locking screws.

[0009] Furthermore, the humeral head assembly includes a positive shoulder humeral head body, a negative shoulder humeral head, and a connecting shaft, wherein the connecting shaft adopts a double-tapered press-fit structure.

[0010] Furthermore, the humeral neck assembly includes a humeral neck body, a reverse humeral neck, and a positive shoulder humeral head pad body, with a positioning groove provided on the inner side of the humeral neck body.

[0011] Furthermore, the humeral stem assembly includes a humeral stem body and a connecting screw, and a second threaded hole is provided on the inner side of the humeral stem body.

[0012] Furthermore, the detachable connection between the glenoid assembly, the humeral head assembly, the humeral neck assembly and the humeral stem assembly is a Morse taper press-fit connection, a threaded locking connection and a reverse buckle anti-detachment connection.

[0013] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0014] I. This modular artificial shoulder joint replacement implant structure integrates three replacement systems—half-shoulder, full-shoulder, and reverse-shoulder—into a single structure through modular design. Each component can be freely disassembled and converted, reducing research and development, testing, and verification processes, lowering production costs and inventory pressure for enterprises, thereby enhancing the scalability and flexibility of shoulder joint replacement surgery. Doctors can precisely match components according to the patient's specific condition to meet the treatment needs of different injury types.

[0015] Second, this modular artificial shoulder joint replacement implant structure simplifies the surgical procedure of shoulder joint replacement through its modular structure. During the operation, only the damaged module needs to be replaced to complete the repair, without the need to replace the entire implant. This shortens the operation time, reduces the surgical risk and the incidence of complications, improves the surgeon's efficiency and ease of operation, and reduces the patient's treatment costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this application;

[0017] Figure 2 This is a schematic diagram of the overall disassembled structure in this application;

[0018] Figure 3 This is a schematic diagram of the overall structure of the shoulder girder liner in this application;

[0019] Figure 4 This is a schematic diagram of the main structure of the humeral stem in this application;

[0020] Figure 5 This is a schematic diagram of the main structure of the humeral neck in this application.

[0021] Markings in the diagram: 1. Glandular assembly; 101. Glandular liner; 1011. Screw hole; 1012. Anti-slip groove; 1013. Arc groove; 1014. Threaded structure hole; 102. Bone screw; 103. Positive shoulder glandular pad; 104. Negative shoulder glandular pad; 105. Negative shoulder locking screw;

[0022] 2. Humeral head assembly; 201. Positive humeral head body; 202. Negative humeral head; 203. Connecting shaft;

[0023] 3. Humeral neck assembly; 301. Humeral neck body; 302. Reverse humeral neck; 303. Positive shoulder humeral head pad body; 304. Positioning groove;

[0024] 4. Humeral stem assembly; 401. Humeral stem body; 402. Connecting screw; 403. Second threaded hole. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] Please see Figures 1 to 5 This embodiment presents a modular artificial shoulder joint replacement implant structure, including a glenoid assembly 1, a humeral head assembly 2, a humeral neck assembly 3, and a humeral stem assembly 4. The glenoid assembly 1, humeral head assembly 2, humeral neck assembly 3, and humeral stem assembly 4 are all detachably connected and interchangeable. Through detachment and interchangeability, the glenoid assembly, humeral head assembly, humeral neck assembly, and humeral stem assembly can respectively constitute a hemi-shoulder joint replacement structure, a total shoulder joint replacement structure, and a reverse shoulder joint replacement structure. The modular artificial shoulder joint replacement implant structure is designed in a modular fashion, dividing the overall structure into... The system comprises four core modules: glenoid component 1, humeral head component 2, humeral neck component 3, and humeral stem component 4. These modules are detachably connected, allowing for free disassembly and combination based on the patient's shoulder injury type and condition. For different conditions such as humeral head fracture necrosis, glenohumeral osteoarthritis, and massive rotator cuff tears, the system can selectively combine components to assemble hemi-shoulder replacement, total shoulder replacement, and reverse shoulder replacement structures. One modular system can meet the needs of three types of replacement surgeries without the need for three separate implant systems.

[0027] The glenoid assembly 1 includes a glenoid liner 101, a bone screw 102, a positive shoulder glenoid pad 103, a negative shoulder glenoid pad 104, and a negative shoulder locking screw 105. As the scapular implant portion in shoulder replacement, the glenoid assembly 1 is composed of the glenoid liner 101, bone screw 102, positive shoulder glenoid pad 103, negative shoulder glenoid pad 104, and negative shoulder locking screw 105. The bone screw 102 is used to fix the glenoid liner 101 to the scapula. The positive shoulder glenoid pad 103 is suitable for total shoulder replacement, and the negative shoulder glenoid pad 104 is suitable for negative shoulder replacement. The negative shoulder locking screw 105 is used to lock and fix the assembly under the negative shoulder structure. All components work together to complete the implantation and fixation on the scapular side. The negative shoulder glenoid pad 104 consists of a conical surface, an arcuate surface, and a beveled surface. The conical surface is used to engage with the negative humeral neck 302 and is locked by tapered compression. The arcuate surface engages with the negative humeral head. The inclined surface increases the range of motion of the humeral head and reduces dead angles. The glenoid pad 103 consists of an arc-shaped surface, an elastic groove, a buckle, and a hole. The arc-shaped surface is used to fit the size of the humeral head. The elastic groove increases the elasticity of the glenoid pad tail entering the hole and then expands it elastically. The buckle can enter the hole again to form a buckle and prevent withdrawal. The hole increases the space for implanting the bone screw 102. The reverse shoulder locking screw 105 consists of a thread and a drive groove. The thread is used to connect the glenoid liner 101. The drive groove is hexagonal and can be adapted to a corresponding screwdriver. It can also be a slotted or Phillips head groove. The bone screw 102 consists of a thread, a cutting edge, and a drive groove. The thread can fix and limit the movement. The cutting edge can cut and remove chips, which is beneficial for self-tapping threads. The drive groove is hexagonal. It can also be a slotted or Phillips head groove and can be connected to a drive screwdriver for connection.

[0028] The glenoid liner 101 is provided with screw holes 1011, anti-slip grooves 1012, arc-shaped grooves 1013, and threaded structural holes 1014 that mate with the anti-shoulder locking screws 105. As the core carrier of the glenoid assembly 1, the glenoid liner 101 has screw holes 1011 on its surface to guide and position the bone screws 102. The anti-slip grooves 1012 on its outer side increase the friction between the implanted component and the bone, preventing the assembly from loosening and exiting. The arc-shaped grooves 1013 on its inner side are used to accommodate the installation of the positive shoulder glenoid pad 103. Simultaneously, the inner wall of the glenoid liner 101 is machined with threaded structural holes 1014 to allow for... The anti-shoulder locking screws 105 cooperate with each other to achieve threaded locking and fixation in the anti-shoulder replacement mode, ensuring connection stability. The axilla liner 101 is composed of threads, screw holes 1011, anti-slip grooves 1012 and arc grooves 1013. The threaded structure hole 1014 is used to cooperate with the anti-shoulder locking screws 105 to play a locking and fixing role. The screw holes 1011 guide and position the bone screws 102. The anti-slip grooves 1012 can play a role in preventing withdrawal. A certain number of anti-slip grooves 1012 increase the friction. The arc grooves 1013 are used to cooperate with the positive shoulder axilla pad 103.

[0029] Humeral head assembly 2 includes a positive shoulder humeral head body 201, a negative shoulder humeral head 202, and a connecting shaft 203. The connecting shaft 203 adopts a double-tapered press-fit structure. The humeral head assembly 2 comes in two types: the positive shoulder humeral head body 201 and the negative shoulder humeral head 202, suitable for total and reverse shoulder replacement surgeries respectively. The connecting shaft 203 has a two-section tapered structure with a coarse and a fine taper. The coarse taper end is locked to the negative shoulder humeral head 202 via tapered press-fit, and the fine taper end is locked to the glenoid liner 101 via tapered press-fit. The double-tapered press-fit structure allows for rapid and precise docking and fixation of the negative shoulder humeral head 202 and the glenoid liner 101, improving assembly efficiency and connection strength. The positive shoulder humeral head body 201 is composed of a tapered... The device consists of a tapered hole and a spherical surface. The tapered hole is connected by Morse taper press-fit locking. The spherical surface simulates the human humeral head. The connecting shaft 203 consists of a coarse taper, a fine taper, and an inner hole. The coarse taper is used to connect the reverse humeral head 202 through a taper press-fit locking mechanism. The fine taper is used to connect the glenoid liner 101 through a taper press-fit locking mechanism. The connecting shaft 203 is used to connect the reverse humeral head 202 and the glenoid liner 101. The inner hole is used to pass the reverse humeral head locking screw 105. The reverse humeral head 202 consists of a groove, an inner hole, and a spherical surface. The groove reduces the weight of the humeral head. The inner hole is a tapered surface that can be press-fit locked with the connecting shaft 203. The spherical surface simulates the function of the humeral head.

[0030] The humeral neck assembly 3 includes a humeral neck body 301, a reverse humeral neck 302, and a positive shoulder humeral head pad body 303. A positioning groove 304 is provided on the inner side of the humeral neck body 301. The humeral neck assembly 3 comprises a conventional humeral neck body 301, a reverse humeral neck 302, and a positive shoulder humeral head pad body 303. The conventional humeral neck body 301 is adapted for full and partial shoulder replacements, the reverse humeral neck 302 is adapted for reverse shoulder replacements, and the positive shoulder humeral head pad body 303 is used to connect the positive shoulder humeral head body 201 and the humeral neck. The positioning groove 304 is provided on the surface of the humeral neck body 301 to achieve eccentric installation of the humeral head for adaptation. Different patient anatomical structures are combined with anti-rotation structures to enhance the anti-rotation capability of the humeral neck body 301 after connection with other components, avoiding the impact of relative rotation of components on the use effect after surgery. The positive shoulder humeral head pad body 303 consists of an inner hole and a conical surface. The inner hole is a tapered hole that connects to the humeral neck through a Morse taper. The conical surface connects to the humeral head through a Morse taper. The reverse humeral neck 302 consists of a conical surface, an inner hole, and an inclined surface. The conical surface connects to the positive shoulder humeral head pad body 303 through a Morse taper. The humeral stem body 401 is used to connect with the connecting screw 402 through the inner hole. The inclined surface of the reverse humeral neck 302 increases the range of motion.

[0031] The humeral stem assembly 4 includes a humeral stem body 401 and a connecting screw 402. A second threaded hole 403 is provided on the inner side of the humeral stem body 401. The humeral stem assembly 4 is composed of the humeral stem body 401 and the connecting screw 402. A conical stem structure is provided at the end of the humeral stem body 401 to facilitate smooth entry into the humeral medullary cavity for fixation. The second threaded hole 403 is provided at the proximal end of the humeral stem body 401. The connecting screw 402, through threaded engagement, connects and fixes the humeral stem assembly 3 to the humeral neck assembly 3. An anti-rotation structure is provided on the outer side of the humeral stem body 401 to increase its connection with the bone. The frictional force of the medullary cavity contact effectively prevents the humeral stem body 401 from rotating or loosening after implantation, ensuring the long-term stability of the implant. The connecting screw 402 consists of threads and a drive groove. The threads can connect to the humeral stem body 401, and the drive groove is hexagonal. With the corresponding screwdriver, the drive groove can also be a slotted groove or a Torx groove. The humeral stem body 401 consists of a threaded hole, a profile groove, and a conical shank. The threaded hole can cooperate with the connecting screw 402. The profile increases the anti-rotation force and friction of the humeral stem body 401, and the conical shank can enter the humeral medullary cavity more smoothly.

[0032] The detachable connections between the glenoid assembly 1, humeral head assembly 2, humeral neck assembly 3, and humeral stem assembly 4 are Morse taper press-fit connection, threaded locking connection, and inverted anti-dislodgement connection. The humeral head body 201 and the humeral neck, and the humeral head pad body 303 and the humeral neck are connected by Morse taper press-fit, relying on taper self-locking to achieve quick and stable docking. The glenoid liner 101 and the reverse shoulder locking screw 105, and the humeral stem body 401 and the connecting screw 402 are connected by threaded locking connection to ensure connection strength. The glenoid pad 103 and the glenoid liner 101 are connected by inverted anti-dislodgement connection. After implantation, the inverted structure automatically engages to prevent the components from falling off. All three connection methods can achieve quick assembly and disassembly, meeting the modular conversion requirements.

[0033] The working principle of the above embodiment is as follows: When using this modular artificial shoulder joint replacement implant structure, the doctor first selects the corresponding components to combine according to the type of shoulder joint condition of the patient. For hemi-shoulder replacement, only the humeral head component 2, humeral neck component 3, and humeral stem component 4 need to be assembled. For total shoulder replacement, the glenoid component 1 with the positive glenoid pad 103 needs to be combined with the complete humeral head, humeral neck, and humeral stem component 4. For reverse shoulder replacement, the glenoid component 1 with the reverse glenoid pad 104, the humeral head component 2 with the reverse humeral head 202, and the humeral neck component 3 with the reverse humeral neck 302 are replaced. Each component is quickly connected and fixed by Morse taper pressing, thread locking, and reverse buckling anti-dislodgement method. Bone screws 102 fix the glenoid component 1 to the scapula. The humeral stem body 401 is implanted into the humeral medullary cavity to complete the implant installation. Damaged modules can be disassembled and replaced individually during the operation without the need for overall replacement.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular artificial shoulder joint replacement implant structure, comprising a glenoid assembly (1), a humeral head assembly (2), a humeral neck assembly (3), and a humeral stem assembly (4), characterized in that: The glenoid assembly (1), humeral head assembly (2), humeral neck assembly (3) and humeral stem assembly (4) are all detachably connected and interchangeable; The glenoid assembly (1), humeral head assembly (2), humeral neck assembly (3) and humeral stem assembly (4) can be connected and converted to form a hemi-shoulder joint replacement structure, a total shoulder joint replacement structure and a reverse shoulder joint replacement structure, respectively.

2. The modular artificial shoulder joint replacement implant structure according to claim 1, characterized in that: The glenoid assembly (1) includes a glenoid liner (101), a bone screw (102), a positive shoulder glenoid pad (103), a negative shoulder glenoid pad (104), and a negative shoulder locking screw (105).

3. The modular artificial shoulder joint replacement implant structure according to claim 2, characterized in that: The shoulder bushing (101) is provided with nail holes (1011), anti-slip grooves (1012), arc grooves (1013), and threaded structure holes (1014) that cooperate with the anti-shoulder locking screws (105).

4. The modular artificial shoulder joint replacement implant structure according to claim 1, characterized in that: The humeral head assembly (2) includes a positive shoulder humeral head body (201), a negative shoulder humeral head (202), and a connecting shaft (203), wherein the connecting shaft (203) adopts a double-tapered press-fit structure.

5. The modular artificial shoulder joint replacement implant structure according to claim 1, characterized in that: The humeral neck assembly (3) includes a humeral neck body (301), a reverse humeral neck (302), and a positive shoulder humeral head pad body (303). A positioning groove (304) is provided on the inner side of the humeral neck body (301).

6. The modular artificial shoulder joint replacement implant structure according to claim 1, characterized in that: The humeral stem assembly (4) includes a humeral stem body (401) and a connecting screw (402), and a second threaded hole (403) is provided on the inner side of the humeral stem body (401).

7. The modular artificial shoulder joint replacement implant structure according to claim 1, characterized in that: The detachable connection between the glenoid assembly (1), the humeral head assembly (2), the humeral neck assembly (3) and the humeral stem assembly (4) is a Morse taper press-fit connection, a threaded locking connection and a reverse buckle anti-detachment connection.

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