Implant prosthesis for partial surface shoulder joint replacement

Abstract

The implant prosthesis comprises a humerus component and a connecting component, one side of the humerus component is provided with an attaching part, the attaching part is attached to a lesion area of a humerus head, and the surface of the side, close to the humerus head, of the humerus component is provided with a first biocompatible coating; one end of the connecting component is connected with the humerus component, the other end of the connecting component is installed on the humerus head, and a second biocompatibility coating is arranged on the surface, making contact with the humerus head, of the connecting component. According to the invention, boning replacement can be carried out on a small lesion area of the shoulder joint, an effective solution is provided for a patient who needs prosthesis replacement in a small lesion area on the surface of the shoulder joint humerus head, the bone mass of the patient can be reserved to the greatest extent, the damage amount to healthy sclerotin is reduced, the operative wound to the patient is reduced, and the rehabilitation of the patient is promoted.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an implant prosthesis for partial surface shoulder joint replacement. Background Art

[0002] Shoulder arthritis, humeral head necrosis, and severe humeral head fractures are already common orthopedic diseases of the shoulder joint. Modern medicine has become relatively mature in treating humeral head necrosis, shoulder arthritis, and humeral head fractures through shoulder replacement.

[0003] Shoulder replacement, also known as Shoulder Arthroplasty or Glenohumeral Arthroplasty, was first introduced by French surgeon Jules Emile Péan in 1893. His surgical procedures included smoothing the shoulder joint and implanting platinum and rubber materials. A famous case in the development of shoulder replacement was in 1955 when Charles Neer performed the first hemiarthroplasty, which essentially replaced only the humeral head, leaving the socket or glenoid intact. Over time, this method became very popular.

[0004] Prior art CN213851268U discloses a shoulder joint prosthesis for surface replacement, comprising: a humeral head prosthesis covering the proximal surface of the humerus, a medullary pin prosthesis implanted in the proximal medullary cavity of the humerus, and a hollow screw that penetrates the medullary pin prosthesis and is connected to the humeral head prosthesis, wherein the medullary pin prosthesis is a spiral bone cage structure. Its advantages are: the spiral bone cage structure is adopted, so that the spiral is screwed into the medullary cavity in the early stage, and the contact area with the bone cortex is larger, and the early stage is more stable; and a small amount of bone fragments can be implanted during the operation, which is conducive to the later bone growth and improves the stability in the later stage. The shoulder joint prosthesis of this patent is to perform bone removal and replacement on the entire humeral head surface above the anatomical neck. For cases with only a small lesion area on the humeral head surface, although the surface shoulder joint can solve this disease by replacing the entire humeral head surface, it will cause damage to the bone area of ​​the patient without lesions, and the amount of damage to healthy bone is large, which increases the surgical trauma of the patient. Summary of the invention

[0005] The purpose of the present invention is to provide an implant prosthesis for partial surface shoulder joint replacement, which is used to solve the problem in the prior art that patients with partial arthritis on the surface of the humeral head can only choose a shoulder joint prosthesis for replacing the entire surface, which will cause damage to the patient's bone area without lesions and waste the patient's bone mass.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an implant prosthesis for partial surface shoulder joint replacement, comprising a humeral component and a connecting component, one side of the humeral component is provided with a fitting portion, the fitting portion and the diseased area of ​​the humeral head are mutually fitted, and the surface of the humeral component close to the humeral head is provided with a first biocompatible coating; one end of the connecting component is connected to the humeral component, and the other end of the connecting component is installed on the humeral head, and the surface of the connecting component in contact with the humeral head is provided with a second biocompatible coating. The implant prosthesis is divided into more than 30 specifications according to the curvature diameter of the humeral head, the diameter of the coverage area and the length of the humeral body. During the operation, the partial surface shoulder joint implant prosthesis with the most suitable specifications and models for the patient can be tested through the matching surgical tools. As a shoulder joint prosthesis replacement with the least bone removal, it provides a good bone mass foundation for subsequent revision replacement.

[0007] The present invention adopts the above technical solution. After the connecting component is connected to the humeral component, the connecting component is installed on the humeral head. The fitting part of the humeral component fits the lesion area of ​​the humeral head to achieve bone removal and replacement of the lesion area. The present invention can perform bone removal and replacement on a small lesion area of ​​the shoulder joint, and provides an effective solution for patients who need prosthetic replacement of a small part of the lesion area on the surface of the humeral head of the shoulder joint. It can retain the patient's bone mass to the greatest extent, reduce the damage to healthy bone, reduce surgical trauma to the patient, and promote patient recovery.

[0008] As an optional implementation of the above technical solution, the connecting component includes a connecting section and a threaded section, one end of the connecting section is connected to the humeral component, the other end of the connecting section is connected to the threaded section, and the threaded section is threadedly connected to the humeral head.

[0009] As an optional implementation of the above technical solution, a central clamping column is provided on the inner side of the humeral component, and the central clamping column and the connecting section are clamped with each other.

[0010] As an optional implementation of the above technical solution, a clamping hole is opened at the end of the connecting section, and the clamping hole is clamped with the central clamping column.

[0011] As an optional implementation of the above technical solution, the central clamping column and the clamping hole are matched through a taper.

[0012] As an optional implementation of the above technical solution, the outer diameter of the threaded section gradually decreases from one end close to the connecting section toward the other end.

[0013] As an optional implementation of the above technical solution, the connecting section and the threaded section are integrally formed.

[0014] As an optional implementation of the above technical solution, the connecting component is made of titanium alloy.

[0015] As an optional implementation of the above technical solution, the material of the humeral component is cobalt-chromium-molybdenum alloy.

[0016] As an optional implementation of the above technical solution, the first biocompatible coating includes a first titanium powder layer and a first hydroxyapatite layer, the first titanium powder layer is arranged on the inner surface of the humeral component, and the first hydroxyapatite layer is arranged on the surface of the first titanium powder layer.

[0017] As an optional implementation of the above technical solution, the second biocompatible coating includes a second titanium powder layer and a second hydroxyapatite layer, the second titanium powder layer is arranged on the surface of the connecting component, and the second hydroxyapatite layer is arranged on the surface of the second titanium powder layer.

[0018] In the present invention, the first biocompatible coating and the second biocompatible coating both use the same biocompatible coating, which is a protective layer that is biocompatible with human tissue and is used to improve the interaction between implants and medical devices and the biological environment. The biocompatible coating can reduce foreign body reactions, inflammation and scar formation, thereby extending the life of the implant and improving patient prognosis. In addition, the biocompatible coating has good cell compatibility, tissue regeneration promotion and anti-infection properties. Since hydroxyapatite is the main inorganic component of human bone tissue. After the implant prosthesis is implanted in the body, calcium and phosphorus will be released from the surface of the material and absorbed by the body tissue, and new tissue will grow, which can induce the growth of bone tissue, accelerate the fusion rate of bone tissue and implant prosthesis, promote patient recovery, and shorten the patient's treatment cycle.

[0019] Since the existing surface shoulder joint prosthesis is to perform bone removal and replacement on the entire humeral head surface above the anatomical neck, for cases where there is only a small lesion area on the humeral head surface, the surface shoulder joint can solve this disease by replacing the entire humeral head surface, but the amount of damage to healthy bone is relatively large. In view of this situation, the present invention designs an implant prosthesis for partial surface shoulder joint replacement. This implant prosthesis can perform bone removal and replacement on small lesion areas. It is similar to the structural appearance of a "thumbnail" and only performs bone removal and replacement on the lesion area to retain the patient's healthy bone to the greatest extent. The implant prosthesis is divided into more than 30 specifications according to the curvature diameter of the humeral head, the diameter of the covered area and the length of the humeral body. During the operation, the matching surgical tools can be used to test the partial surface shoulder joint prosthesis with the most suitable specifications for the patient. As a shoulder joint prosthesis replacement with the least bone removal, it provides a good bone mass foundation for subsequent revision replacement.

[0020] The beneficial effects of the present invention are:

[0021] The present invention provides an implant prosthesis for partial surface shoulder joint replacement, wherein a fitting portion is provided on one side of a humeral component, the fitting portion and the diseased area of ​​the humeral head are fitted together, one end of a connecting component is connected to the humeral component, and the other end of the connecting component is mounted on the humeral head. After the connecting component is connected to the humeral component, the connecting component is mounted on the humeral head, the fitting portion of the humeral component and the diseased area of ​​the humeral head are fitted together, and bone removal and replacement of the diseased area are achieved. The present invention can perform bone removal and replacement on small diseased areas of the shoulder joint, and provides an effective solution for patients who need prosthetic replacement of a small part of the diseased area on the surface of the humeral head of the shoulder joint, which can retain the patient's bone mass to the greatest extent, reduce the amount of damage to healthy bone, reduce surgical trauma to the patient, and promote patient recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the three-dimensional structure of an implanted prosthesis in one embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of the cross-sectional structure of an implanted prosthesis in one embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of the three-dimensional structure of a humeral component in one embodiment of the present invention;

[0025] Figure 4 is a diagram of a use state of an existing prosthesis in one embodiment of the present invention;

[0026] Figure 5 This is a diagram of the use status of an implanted prosthesis in one embodiment of the present invention.

[0027] In the figure: 1-humeral component; 2-connecting component; 3-humeral head; 4-lesion area; 11-center clamping column; 21-connecting section; 22-threaded section; 23-clamping hole. DETAILED DESCRIPTION

[0028] like Figure 1-Figure 5 As shown, this embodiment provides an implant prosthesis for partial surface shoulder joint replacement, including a humeral component 1 and a connecting component 2. The humeral component 1 and the connecting component 2 are connected to form a structural appearance similar to a "thumbnail", which only removes and replaces the diseased area 4 of the humeral head 3, and retains the patient's healthy bone to the greatest extent. The implant prosthesis is divided into more than 30 specifications according to the curvature diameter of the humeral head 3, the diameter of the covered area and the length of the humeral body. During the operation, the matching surgical tools can be used to test the partial surface shoulder joint implant prosthesis with the most suitable specifications for the patient. As a shoulder joint prosthesis replacement with the least bone removal, it provides a good bone mass foundation for subsequent revision replacement.

[0029] A fitting portion is provided on one side of the humeral component 1, and the fitting portion fits with the diseased area 4 of the humeral head 3. A first biocompatible coating is provided on the surface of the humeral component 1 on one side close to the humeral head 3. The size of the fitting portion is larger than the size of the diseased area 4 and can match the original curvature of the patient's humeral head 3, so that the implanted prosthesis can perform bone removal and replacement on the diseased area 4 of the humeral head 3. A first biocompatible coating is provided on the surface of the humeral component 1, and the first biocompatible coating can improve the compatibility of the humeral component 1 with the human body.

[0030] One end of the connecting component 2 is connected to the humeral component 1, and the other end of the connecting component 2 is installed on the humeral head 3, and the surface of the connecting component 2 in contact with the humeral head 3 is provided with a second biocompatible coating, and the second biocompatible coating can improve the compatibility of the connecting component 2 with the human body. After the connecting component 2 is connected to the humeral component 1, the connecting component 2 is installed on the humeral head 3, and the fitting portion of the humeral component 1 fits with the diseased area 4 of the humeral head 3 to achieve bone removal and replacement of the diseased area 4.

[0031] The present invention can perform bone removal and replacement on small diseased areas 4 of the shoulder joint, providing an effective solution for patients who need prosthetic replacement of a small diseased area 4 on the surface of the humeral head 3 of the shoulder joint. It can retain the patient's bone mass to the greatest extent, reduce the damage to healthy bone, reduce surgical trauma to the patient, and promote patient recovery.

[0032] like Figure 1 and Figure 2 As shown, in this embodiment, the connecting component 2 includes a connecting section 21 and a threaded section 22, one end of the connecting section 21 is connected to the humeral component 1, and the other end of the connecting section 21 is connected to the threaded section 22, the threaded section 22 is threadedly connected to the humeral head 3, and the outer wall of the threaded section 22 is provided with an external thread, and the threaded section 22 can be rotatably implanted in the humeral head 3. Preferably, the outer diameter of the threaded section 22 gradually decreases from one end close to the connecting section 21 toward the other end, and the threaded section 22 has a conical structure, so that the connecting component 2 is more stably fixed in the medullary cavity after being rotated and implanted.

[0033] like Figure 3 As shown, a central clamping column 11 is provided on the inner side of the humeral component 1, and the central clamping column 11 is mutually clamped with the connecting section 21, which is conducive to the coordinated installation of the humeral component 1 and the connecting component 2. Preferably, a clamping hole 23 is provided at the end of the connecting section 21, and the clamping hole 23 is clamped with the central clamping column 11. The central clamping column 11 of the humeral component 1 is clamped into the clamping hole 23 of the connecting section 21 to realize the assembly of the humeral component 1 and the connecting component 2. Furthermore, the central clamping column 11 and the clamping hole 23 are matched through a taper, so that the connection between the humeral component 1 and the connecting component 2 is more stable, reducing the risk of the humeral component 1 and the connecting component 2 falling off.

[0034] In order to improve the overall lightness of the connecting component 2, the connecting section 21 and the threaded section 22 are integrally formed. The connecting component 2 is made of titanium alloy, and the humeral component 1 is made of cobalt-chromium-molybdenum alloy.

[0035] In this embodiment, the first biocompatible coating includes a first titanium powder layer and a first hydroxyapatite layer, the first titanium powder layer is arranged on the inner surface of the humeral component 1, and the first hydroxyapatite layer is arranged on the surface of the first titanium powder layer. The second biocompatible coating includes a second titanium powder layer and a second hydroxyapatite layer, the second titanium powder layer is arranged on the surface of the connecting component 2, and the second hydroxyapatite layer is arranged on the surface of the second titanium powder layer. The first titanium powder layer and the second titanium powder layer are both titanium powder sprayed, and the first hydroxyapatite layer and the second hydroxyapatite layer are both hydroxyapatite sprayed. Titanium powder and hydroxyapatite are both sprayed on the surface by plasma spraying. Titanium powder and hydroxyapatite are both plasma sprayed in a negative pressure sealed container with controllable atmosphere.

[0036] In the present invention, the first biocompatible coating and the second biocompatible coating both use the same biocompatible coating, which is a protective layer that is biocompatible with human tissue and is used to improve the interaction between implants and medical devices and the biological environment. The biocompatible coating can reduce foreign body reactions, inflammation and scar formation, thereby extending the life of the implant and improving patient prognosis. In addition, the biocompatible coating has good cell compatibility, tissue regeneration promotion and anti-infection properties. Since hydroxyapatite is the main inorganic component of human bone tissue. After the implant prosthesis is implanted in the body, calcium and phosphorus will be released from the surface of the material and absorbed by the body tissue, and new tissue will grow, which can induce the growth of bone tissue, accelerate the fusion rate of bone tissue and implant prosthesis, promote patient recovery, and shorten the patient's treatment cycle.

[0037] The implant prosthesis of the present invention is used for partial replacement of the surface of the humeral head 3 of the shoulder joint, and is mainly composed of a humeral component 1 and a connecting component 2. The material of the humeral component 1 is a cobalt-chromium-molybdenum alloy (CoCrMo), and the material of the connecting component 2 is a titanium alloy (Ti6Al4V). The combination of the humeral component 1 and the connecting component 2 is a taper match. The surface of the humeral component 1 and the surface of the connecting component 2 both have a biocompatible coating formed by spraying titanium powder and hydroxyapatite. The biocompatible coating enables the implant prosthesis to have a better compatibility effect after implantation. The connecting component 2 is a taper spiral structure, which is more stable in the medullary cavity after rotational implantation. The humeral component 1 and the connecting component 2 have a variety of specifications. During the operation, the size of the humeral component 1 will be compared and tested with the original ecological curvature radius of the patient's humeral head 3 through a matching surgical instrument to ensure that the implant prosthesis restores the patient's original ecological ball and socket anatomical structure to the greatest extent after implantation.

[0038] like Figure 4 and Figure 5 As shown, since the existing surface shoulder joint prosthesis is to perform bone removal and replacement on the entire surface of the humeral head 3 above the anatomical neck, for cases where there is only a small lesion area 4 on the surface of the humeral head 3, the surface shoulder joint can solve this disease by replacing the entire surface of the humeral head 3, but the amount of damage to healthy bone is large. In view of this situation, the present application has designed an implant prosthesis for partial surface shoulder joint replacement. This implant prosthesis can perform bone removal and replacement on small lesion areas 4. It is similar to the structural appearance of a "thumbnail" and only performs bone removal and replacement on the lesion area 4, retaining the patient's healthy bone to the greatest extent. The implant prosthesis is divided into more than 30 specifications according to the curvature diameter of the humeral head 3, the diameter of the covered area and the length of the humeral body. During the operation, the matching surgical tools can be used to test the partial surface shoulder joint prosthesis with the most suitable specifications for the patient. As a shoulder joint prosthesis replacement with the least bone removal, it provides a good bone mass foundation for subsequent revision replacement.

[0039] In the description of the present invention, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be mechanically connected or electrically connected; may be directly connected or indirectly connected through an intermediate medium, may be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood. In addition, the specific features, structures, etc. described in the embodiments are included in at least one embodiment. Under the condition that there is no contradiction, those skilled in the art may combine the features of different embodiments. The protection scope of the present invention is not limited to the above-mentioned specific embodiments. According to the basic technical concept of the present invention, the embodiments that can be associated with by ordinary technicians in this field without creative work all belong to the protection scope of the present invention.

Claims

1. An implant prosthesis for partial surface shoulder joint replacement, characterized in that: The invention comprises a humeral component (1) and a connecting component (2), wherein one side of the humeral component (1) is provided with a fitting portion, the fitting portion and the diseased area (4) of the humeral head (3) are fitted with each other, and a first biocompatible coating is provided on a surface of the humeral component (1) close to the humeral head (3); one end of the connecting component (2) is connected to the humeral component (1), the other end of the connecting component (2) is mounted on the humeral head (3), and a second biocompatible coating is provided on a surface of the connecting component (2) in contact with the humeral head (3).

2. The implant prosthesis for partial surface shoulder joint replacement according to claim 1, characterized in that: The connecting component (2) comprises a connecting section (21) and a threaded section (22); one end of the connecting section (21) is connected to the humeral component (1); the other end of the connecting section (21) is connected to the threaded section (22); and the threaded section (22) is threadedly connected to the humeral head (3).

3. The implant prosthesis for partial surface shoulder joint replacement according to claim 2, characterized in that: A central clamping column (11) is provided on the inner side of the humeral component (1), and the central clamping column (11) and the connecting section (21) are mutually clamped.

4. The implant prosthesis for partial surface shoulder joint replacement according to claim 3, characterized in that: A clamping hole (23) is provided at the end of the connecting section (21), and the clamping hole (23) is clamped with the central clamping column (11).

5. The implant prosthesis for partial surface shoulder joint replacement according to claim 4, characterized in that: The central clamping column (11) and the clamping hole (23) are matched with each other through a taper.

6. The implant prosthesis for partial surface shoulder joint replacement according to claim 2, characterized in that: The outer diameter of the threaded section (22) gradually decreases from one end close to the connecting section (21) toward the other end.

7. The implant prosthesis for partial surface shoulder joint replacement according to claim 2, characterized in that: The connecting section (21) and the threaded section (22) are integrally formed.

8. The implant prosthesis for partial surface shoulder joint replacement according to claim 1, characterized in that: The material of the connecting component (2) is titanium alloy; the material of the humeral component (1) is cobalt-chromium-molybdenum alloy.

9. The implant prosthesis for partial surface shoulder joint replacement according to claim 1, characterized in that: The first biocompatible coating comprises a first titanium powder layer and a first hydroxyapatite layer, wherein the first titanium powder layer is arranged on the inner surface of the humeral component (1), and the first hydroxyapatite layer is arranged on the surface of the first titanium powder layer.

10. The implant prosthesis for partial surface shoulder joint replacement according to claim 1, characterized in that: The second biocompatible coating comprises a second titanium powder layer and a second hydroxyapatite layer, wherein the second titanium powder layer is arranged on the surface of the connecting component (2), and the second hydroxyapatite layer is arranged on the surface of the second titanium powder layer.

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