Acetabular prosthesis for pets

Abstract

The utility model discloses a pet acetabular prosthesis in the technical field of pet medical instruments. The pet acetabular prosthesis comprises an acetabular cup and an acetabular lining. The acetabular cup is provided with a guide hole, an inner limiting platform, an inner arc transition, a clamping groove, an inner conical transition and a plug. The acetabular lining is provided with a guide column, an outer limiting platform, an outer arc transition part, a clamping block and an outer conical transition part. Threaded holes are formed in the acetabular cup, the multiple threaded holes are arranged in the circumferential direction, the multiple threaded holes are symmetrically arranged, the plugs with the plum blossom connectors are loaded in the threaded holes, and in the hip joint replacement surgery, a doctor can unscrew the plugs arranged in the circumferential direction according to specific fixing requirements and then screw in fixing screws. And the plug can be reserved at the place where the screw is not screwed, so that the fixing requirements at different angles are met.

Description

Technical Field

[0001] The utility model relates to the field of pet medical equipment, in particular to a pet acetabulum prosthesis. Background Art

[0002] Hip disease is a common condition in dogs, often manifested by a reluctance to walk for extended periods, a reluctance to jump into cars, an aversion to stairs, and frequent side-lying with flexed hind legs. Intermittent toe dragging may also be observed. Gait analysis reveals a shortened stride length, and brisk gait may be intensely painful, with affected dogs preferring to run. Left untreated, degenerative arthritis of the hip can develop, with lifelong progression. Hip replacement is the only permanent and satisfactory treatment option when conservative treatment is ineffective.

[0003] The use of biological prostheses to preserve the original bone as much as possible during hip replacement surgery has gradually become the preferred method. However, dogs exercise frequently and quickly, and the degree of damage to the hip joints of dogs of different sizes and species varies. During hip replacement surgery, it is necessary to perform appropriate pre-fixation of the acetabulum prosthesis from different angles targeting weak areas. Dogs are naturally lively and active, and they like to run to release their nature. If the recovery period is too long, the dog will be kept in the house for a long time without the opportunity to go out, which will make it feel depressed and prone to anxiety and other psychological problems. Once psychological problems arise, dogs will enter self-protection mode and are prone to violent biting or becoming autistic. Utility Model Content

[0004] The purpose of the present invention is to provide a pet acetabular prosthesis that provides multi-angle fixation and accelerates bone ingrowth to shorten the recovery period during use, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pet acetabular prosthesis, comprising an acetabular cup and an acetabular liner:

[0006] The acetabular cup is provided with a guide hole, an inner limiting platform, an inner arc transition, a clamping groove, an inner conical transition, and a screw plug;

[0007] The acetabular liner is provided with a guide column, an external limiting platform, an external arc transition, a clamping block, and an external tapered transition;

[0008] The acetabular cup and the acetabular liner are press-fitted and installed. During installation, the guide column and the guide hole are overlapped. The guide hole is slightly smaller than the guide column, thereby achieving a slight interference fit. The inner limit platform and the outer limit platform are overlapped, and the clamping block is connected by clamping in the slot. The cooperation of the inner arc transition, the inner conical transition and the outer arc transition, and the outer conical transition provides higher coaxiality for the press-fit installation.

[0009] As a further solution of the present invention: threaded holes are provided in the acetabulum cup, wherein a plurality of threaded holes are arranged circumferentially and a plurality of threaded holes are arranged symmetrically.

[0010] As a further solution of the present invention: the screw plug is loaded in the threaded hole, and the screw plug is a plum blossom-shaped interface.

[0011] As a further solution of the present invention: a trabecular bone structure is attached to the outer surface of the acetabular cup, and the trabecular bone structure is integrally formed by 3D printing.

[0012] As a further solution of the present invention: the acetabular liner is composed of two inclined surfaces to form an anti-slip structure, the inner surface of the acetabular liner is provided with a countersunk hole, the trabecular structure is made of BMP2 material, the BMP2 simulated fetus is dissolved in PBS buffer, and the BMP2 is loaded into the trabecular structure through multiple immersions.

[0013] As a further solution of the present invention: the acetabular cup is integrally formed from alloy powder by 3D printing, and its strength is ensured by heat treatment, and the acetabular liner is made of ultra-high molecular weight polyethylene.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The acetabulum cup is provided with threaded holes, some of which are arranged circumferentially, and some of which are symmetrically arranged and loaded with screw plugs with plum blossom interfaces. During hip replacement surgery, the doctor can unscrew the circumferentially arranged screw plugs and screw in the fixing screws according to specific fixation requirements. The screw plugs can be retained in places where screws are not required to achieve fixation requirements at different angles.

[0016] The trabecular bone structure is attached to the outer surface of the acetabular cup. The trabecular bone structure is integrally formed by 3D printing, and then the basic structure is completed through surface treatment. The BMP2 simulated fetus is dissolved in PBS buffer solution, and the BMP2 is loaded into the trabecular bone structure through multiple immersions. This composite structure can guide stem cells to differentiate into bone cells, accelerate bone regeneration and induce bones to attach to the trabecular structure of the prosthesis, reducing the recovery period. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of a pet acetabulum prosthesis according to the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the acetabular cup in a pet acetabular prosthesis according to the present invention;

[0019] Figure 3 This is a structural diagram of the arrangement of threaded holes in the acetabular cup of a pet acetabular prosthesis according to the present invention;

[0020] Figure 4 This is a schematic structural diagram of a screw plug in a pet acetabulum prosthesis according to the present invention;

[0021] Figure 5 This is a schematic cross-sectional view of the acetabular liner in a pet acetabular prosthesis according to the present invention;

[0022] Figure 6 The utility model is a schematic cross-sectional view of the assembly of the acetabular cup and the acetabular liner in a pet acetabular prosthesis.

[0023] In the figure: 1. Acetabular cup; 11. Guide hole; 12. Inner limit platform; 13. Inner arc transition; 14. Clamping groove; 15. Inner conical transition; 16. Screw plug; 17. Threaded hole; 18. Trabecular structure; 2. Acetabular liner; 21. Guide column; 22. Outer limit platform; 23. Outer arc transition; 24. Clamping block; 25. Outer conical transition; 26. Anti-slip structure; 27. Countersunk hole. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0026] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed connection or disposition, detachable connection or disposition, or integral connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0028] See also Figure 1-6 A pet acetabular prosthesis comprises an acetabular cup 1 and an acetabular liner 2. The acetabular cup 1 is provided with a guide hole 11, an inner limiting platform 12, an inner arc transition 13, a retaining groove 14, an inner tapered transition 15, and a screw plug 16. The acetabular liner 2 is provided with a guide post 21, an outer limiting platform 22, an outer arc transition 23, a retaining block 24, and an outer tapered transition 25. The acetabular cup 1 and acetabular liner 2 are press-fitted together. During installation, the guide post 21 is aligned with the guide hole 11. The guide hole 11 is slightly smaller than the guide post 21, thereby achieving a slight interference fit. The inner limiting platform 12 and the outer limiting platform 22 are aligned, and the retaining block 24 is engaged with the retaining groove 14. The inner arc transition 13, the inner tapered transition 15, the outer arc transition 23, and the outer tapered transition 25 provide high coaxiality for press-fit installation. The acetabular cup 1 is provided with threaded holes 17, several of which are arranged circumferentially and symmetrically. A screw plug 16 is mounted in a threaded hole 17 and has a plum blossom-shaped interface. A trabecular bone structure 18 is attached to the outer surface of the acetabular cup 1 and is integrally formed by 3D printing. Two inclined surfaces within the acetabular liner 2 form an anti-slip structure 26, and a countersunk hole 27 is provided on the inner surface of the acetabular liner 2.

[0029] The acetabular cup 1 is integrally formed from alloy powder by 3D printing, and its strength is ensured by heat treatment. The acetabular liner 2 is made of ultra-high molecular weight polyethylene.

[0030] Example 1:

[0031] refer to Figures 1 to 4 A pet acetabulum prosthesis, the acetabulum cup 1 is integrally formed from alloy powder through 3D printing, and its strength is ensured to meet the use requirements through heat treatment. During hip replacement surgery, the doctor gives priority to installing the acetabulum cup 1. After polishing the damaged acetabulum, the acetabulum cup 1 is first knocked into the damaged acetabulum. The acetabulum cup 1 is provided with threaded holes 17, several of which are arranged circumferentially and several are arranged symmetrically. Screw plugs 16 are loaded in the threaded holes 17. The screw plugs are plum blossom-shaped interfaces. The doctor determines the number and angle of the fixing screws based on the polishing condition of the acetabulum and the bone quality, then unscrews the corresponding screw plugs 16 and screws the fixing screws into the threaded holes 17. The screw plugs 16 can be retained in places where the fixing screws are not needed to achieve fixation requirements at different angles.

[0032] refer to Figure 2 、 Figure 5 、 Figure 6After the acetabular cup 1 is installed, the acetabular liner 2 is press-fitted onto the acetabular cup 1. The acetabular cup 1 is provided with a guide hole 11, an inner limiting platform 12, an inner arc transition 13, a retaining groove 14, and an inner tapered transition 15. The acetabular liner 2 is provided with a guide post 21, an outer limiting platform 22, an outer arc transition 23, a retaining block 24, and an outer tapered transition 25. During installation, the guide post 21 is aligned with the guide hole 11. The guide hole 11 is slightly smaller than the guide post 21, thereby achieving a slight interference fit. The inner limiting platform 12 and the outer limiting platform 22 overlap, ensuring that the retaining block 24 is retained in the retaining groove 14. The combination of the inner arc transition 13, the inner tapered transition 15, the outer arc transition 23, and the outer tapered transition 25 provides high coaxiality for press-fit installation and reduces clearance.

[0033] refer to Figure 2 、 Figure 5 After the acetabular liner 2 and acetabular cup 1 are press-fitted, the ball head is inserted into the inner surface of the acetabular liner 2. Two inclined surfaces on the inner surface of the acetabular liner 2 together form an anti-dislodgement structure 26 to prevent the ball head from dislodging from the acetabular liner 2. After all implants are implanted, the wound is sutured. The acetabular cup 1 is initially fixed with screws to prevent the acetabular prosthesis from twisting or falling out due to excessive exercise during the dog's recovery period, despite the owner's advice. A trabecular bone structure 18 is attached to the outer surface of the acetabular cup 1 for later biofixation. The trabecular bone structure 18 is integrally formed by 3D printing and then surface treated to complete the basic structure. A BMP2 simulated embryo is dissolved in PBS buffer and loaded into the trabecular bone structure 18 through multiple soaking. This composite structure guides stem cells to differentiate into osteocytes, accelerates bone regeneration, and induces bone attachment to the trabecular bone structure 18 of the acetabular prosthesis. This shortens the dog's recovery period and reduces the psychological stress, anxiety, and other issues that can occur when the dog is confined to the house for extended periods without opportunities to go out.

[0034] Preferably, in this embodiment, BMP2 is bone morphogenetic protein 2. BMPs are a group of highly conserved functional proteins belonging to the transforming growth factor-β (TGF-β) family. BMP-2 is one of the most extensively studied BMPs and has the strongest osteogenic activity. It has the ability to induce the directional differentiation and proliferation of undifferentiated mesenchymal stem cells into chondrocytes and osteoblasts, accelerating bone defect repair.

[0035] In this embodiment, a self-locking screw plug 16 may also be used. This screw plug can be automatically locked after being screwed in, and can be firmly fixed without the need for additional tools.

[0036] As an improvement to this embodiment, to enhance prosthesis stability and reduce the risk of postoperative loosening, a more robust locking mechanism can be designed between the acetabular cup 1 and the acetabular liner 2. For example, a rotatable or retractable locking pin can be introduced. Once the acetabular liner is fully press-fitted, the locking pin can be rotated or pushed to further secure the acetabular liner, ensuring that it will not move in the event of a significant impact.

[0037] For example, while existing trabecular bone structures18 can already guide stem cell differentiation into osteoblasts and accelerate bone regeneration, there is still room for improvement. If new biomaterials are developed, or if there are technological breakthroughs or improvements to existing materials, consideration could be given to using new biomaterials or modifying the surface of existing materials to enhance their biocompatibility, antimicrobial properties, and mechanical stability. Furthermore, the effects of varying porosity and pore size on osteoblast growth and angiogenesis could be used to identify optimal design parameters.

[0038] To monitor the condition of the acetabular implant and the healing of surrounding tissues in real time, microsensors can be integrated into the implant. These sensors monitor key indicators such as temperature, pressure, and pH, and wirelessly transmit the data to an external device for analysis. This allows doctors and pet owners to monitor the recovery of the surgical site and take appropriate interventions if necessary.

[0039] Although the threaded hole 17 and the screw plug 16 in the current design can already meet the needs of multi-angle fixation, in order to further improve the convenience of operation and the stability of fixation, their size, shape and material can be optimized.

[0040] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0041] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A pet acetabular prosthesis, comprising an acetabular cup (1) and an acetabular liner (2), characterized in that: The acetabulum cup (1) is provided with a guide hole (11), an inner limiting platform (12), an inner arc transition (13), a clamping groove (14), an inner conical transition (15), and a screw plug (16); The acetabulum liner (2) is provided with a guide column (21), an outer limiting platform (22), an outer arc transition (23), a clamping block (24), and an outer conical transition (25); The acetabular cup (1) and the acetabular liner (2) are press-fitted and installed. During installation, the guide column (21) is overlapped with the guide hole (11). The guide hole (11) is slightly smaller than the guide column (21), thereby achieving a slight interference fit. The inner limit platform (12) is overlapped with the outer limit platform (22), and the clamping block (24) is snap-fitted and connected with the clamping groove (14). The cooperation of the inner arc transition (13), the inner conical transition (15), the outer arc transition (23), and the outer conical transition (25) provides a higher coaxiality for the press-fit installation.

2. A pet acetabular prosthesis according to claim 1, characterized in that: The acetabulum cup (1) is provided with threaded holes (17), wherein a plurality of threaded holes (17) are arranged circumferentially, and a plurality of threaded holes (17) are arranged symmetrically.

3. The pet acetabular prosthesis according to claim 1, characterized in that: The screw plug (16) is loaded in the threaded hole (17), and the screw plug (16) is a plum blossom-shaped interface.

4. The pet acetabular prosthesis according to claim 1, characterized in that: A trabecular bone structure (18) is attached to the outer surface of the acetabulum cup (1), the trabecular bone structure (18) is integrally formed by 3D printing, and the trabecular bone structure (18) is made of BMP2 material.

5. The pet acetabular prosthesis according to claim 1, characterized in that: The acetabulum liner (2) comprises two inclined surfaces which together form an anti-slip structure (26), and the inner surface of the acetabulum liner (2) is provided with a countersunk hole (27).

6. The pet acetabular prosthesis according to claim 1, characterized in that: The acetabular cup (1) is integrally formed from alloy powder by 3D printing, and its strength is ensured by heat treatment; the acetabular liner (2) is made of ultra-high molecular weight polyethylene.

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