Angle-adjustable artificial hip joint prosthesis structure

Abstract

The invention relates to the technical field of medical instruments, and discloses an angle-adjustable artificial hip joint prosthesis structure which comprises a thighbone connecting assembly, an acetabulum connecting assembly and a movable part movably connected between the thighbone connecting assembly and the acetabulum connecting assembly. The thighbone connecting assembly comprises a first connecting unit fixedly connected with the movable part, a thighbone stem detachably connected to the lower end of the first connecting unit, and a connecting screw fixedly connected to the upper end of the thighbone stem and in threaded connection with the first connecting unit. The acetabulum connecting assembly comprises a second connecting unit fixedly connected with the movable part and an acetabulum fixedly connected to the second connecting unit. Stable rotating connection is achieved through the double-shaft moving part, and a traditional easily-abraded spherical surface structure is replaced; the locking assembly is matched to realize personalized angle adjustment and locking; the femoral stem can be detached and replaced, and adaptability is improved; the surface composite coating promotes osseointegration and improves biocompatibility, the overall structure stability is high, adaptability is high, and postoperative recovery is fast.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, in particular to an artificial hip joint prosthesis structure with adjustable angle. Background Art

[0002] At present, artificial hip prostheses in clinical applications mostly use a ball-and-socket spherical connection structure, that is, the joint motion function is achieved through the spherical fit between the femoral head and the acetabular cup. However, this traditional structure has obvious limitations during long-term use: on the one hand, the spherical contact area is prone to wear debris due to repeated friction, leading to complications such as osteolysis and prosthesis loosening; on the other hand, its angle fixation or adjustment range is limited, and it is difficult to accurately adapt it according to the patient's individual anatomical structure during surgery. If an angle deviation occurs after surgery, a secondary revision surgery is required, which increases the patient's pain and medical burden. In addition, the existing prosthetic structure lacks an effective integrated design of the bioactive coating, which affects the efficiency of bone integration and limits its application in complex cases. Therefore, we proposed an artificial hip prosthesis structure with adjustable angle. Summary of the Invention

[0003] The main purpose of the present invention is to provide an artificial hip joint prosthesis structure with adjustable angle, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] An angle-adjustable artificial hip joint prosthesis structure includes a femoral connection component, an acetabular connection component, and a movable part movably connected between the femoral connection component and the acetabular connection component; the femoral connection component includes a No. 1 connection unit fixedly connected to the movable part, a femoral stem detachably connected to the lower end of the No. 1 connection unit, and a connecting screw fixedly connected to the upper end of the femoral stem and threadedly connected to the No. 1 connection unit;

[0006] The acetabulum connection assembly includes a second connection unit fixedly connected to the movable member, and an acetabulum fixedly connected to the second connection unit;

[0007] The movable part includes a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft are perpendicular to each other and are integrally formed, and both ends of the first rotating shaft and the second rotating shaft are fixedly connected to a bearing sleeve;

[0008] The No. 1 connecting unit is fixedly connected to the bearing sleeve on the No. 2 rotating shaft, and the No. 2 connecting unit is fixedly connected to the bearing sleeve on the No. 1 rotating shaft.

[0009] As a further improvement of the above scheme, the No. 1 connecting unit includes a No. 1 connecting head, which is a U-shaped structure and is fixedly connected to the two bearing sleeves on the No. 2 rotating shaft. The lower end of the No. 1 connecting head is provided with a connecting screw hole threadedly connected to the connecting screw, and the top of the No. 1 connecting head is integrally formed with two symmetrically distributed No. 1 locking components.

[0010] As a further improvement of the above scheme, the No. 2 connecting unit includes a No. 2 connecting head, which is a U-shaped structure and is fixedly connected to the two bearing sleeves on the No. 1 rotating shaft. The top of the No. 2 connecting head is integrally formed with a connecting rod, and the top of the connecting rod is fixedly connected to an inner lining support. The bottom of the No. 2 connecting head is integrally formed with two symmetrically distributed No. 2 locking assemblies.

[0011] As a further improvement of the above solution, the inner liner is a hemispherical structure, and the acetabulum is fixedly sleeved on the outside of the inner liner.

[0012] As a further improvement of the above-mentioned solution, the No. 2 locking assembly includes a support base integrally formed at the bottom of the No. 2 connecting head, a sliding groove is provided on the support base, a locking block is slidably connected in the sliding groove, a positioning screw is threadedly inserted into the support base, and the locking block is fixedly connected in the support base by the positioning screw.

[0013] As a further improvement of the above solution, three positioning holes adapted to the positioning screws are provided on the locking block, and one end of the locking block is designed as an arc surface.

[0014] As a further improvement of the above solution, the structure of the No. 1 locking assembly is the same as that of the No. 2 locking assembly, and the connection method between the No. 1 locking assembly and the No. 1 connector is the same as the connection method between the No. 2 locking assembly and the No. 2 connector.

[0015] As a further improvement of the above solution, the outer surfaces of the femoral stem and the acetabulum are coated with a composite coating; the composite coating includes a bottom layer, a middle layer, a functional layer and a surface layer from the inside to the outside.

[0016] As a further improvement of the above solution, the bottom layer is a titanium oxide layer, the middle layer is a hydroxyapatite HA layer, the functional layer is a bioactive glass layer, and the surface layer is a mixture containing collagen and specific growth factors.

[0017] As a further improvement of the above solution, the specific growth factor is bone morphogenetic protein-2.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention avoids the wear problem of the traditional ball-and-socket structure caused by long-term friction by providing a movable part consisting of a No. 1 rotating shaft and a No. 2 rotating shaft, and cooperates with a bearing sleeve to achieve a stable rotation connection. This dual-axis structure not only provides a degree of freedom of movement similar to that of the human hip joint, but also improves the overall durability and service life through the reasonable selection of metal-metal or metal-polymer materials, and is suitable for the long-term use needs of patients of different age groups.

[0020] 2. The present invention provides a No. 1 locking assembly and a No. 2 locking assembly on the No. 1 connector and the No. 2 connector, respectively. The operator can flexibly adjust the acetabulum abduction angle and anteversion angle before or during surgery according to the patient's pelvic CT imaging data, and complete the angle locking through the locking block and positioning screw. This design breaks through the limitations of traditional prosthesis angle fixation, realizes the transformation from "universal" to "personalized", and improves surgical flexibility and postoperative stability.

[0021] 3. The femoral stem of the present invention forms a detachable connection with the No. 1 connecting unit through a connecting screw. The doctor can choose femoral stems of different lengths, diameters or materials according to the patient's specific weight, bone thickness and activity intensity to achieve a more refined personalized match. This structure not only improves the applicability of the prosthesis, but also facilitates rapid replacement during surgery, reduces operation time, and reduces the risk of postoperative complications.

[0022] 4. To enhance the prosthesis's ability to bond with the host bone, the present invention applies a multi-layer composite coating to the femoral stem and acetabulum. This coating comprises a titanium oxide base layer, a hydroxyapatite intermediate layer, a bioactive glass functional layer, and a surface layer containing collagen and BMP-2. This composite coating not only effectively promotes bone tissue attachment and growth, but also accelerates osseointegration, shortens the recovery period, and significantly improves post-implant biostability and long-term efficacy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of the overall structure of the angle-adjustable artificial hip joint prosthesis of the present invention;

[0025] Figure 2 Schematic diagram of the structure of the angle-adjustable artificial hip joint prosthesis of the present invention;

[0026] Figure 3 A schematic structural diagram of the femoral connection assembly of the angle-adjustable artificial hip joint prosthesis structure of the present invention;

[0027] Figure 4 This is a schematic structural diagram of the first connection unit of the angle-adjustable artificial hip joint prosthesis structure of the present invention;

[0028] Figure 5 A schematic structural diagram of the acetabulum connection assembly of the angle-adjustable artificial hip joint prosthesis structure of the present invention;

[0029] Figure 6 This is a schematic structural diagram of the second connection unit of the angle-adjustable artificial hip joint prosthesis structure of the present invention;

[0030] Figure 7 A schematic diagram of the partial structure of the second locking assembly of the angle-adjustable artificial hip joint prosthesis structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the partial structure of the composite coating of the angle-adjustable artificial hip joint prosthesis structure of the present invention.

[0032] In the figure: 1. Femoral connection component; 11. Connection unit No. 1; 111. Connection head No. 1; 112. Locking component No. 1; 113. Connecting screw hole; 12. Femoral stem; 13. Connecting screw; 2. Acetabular connection component; 21. Connection unit No. 2; 211. Connection head No. 2; 212. Connecting rod; 213. Inner lining; 214. Locking component No. 2; 2141. Support seat; 2142. Slide; 2143. Locking block; 21431. Positioning hole; 2144. Positioning screw; 22. Acetabular; 3. Movable part; 31. Rotating shaft No. 1; 32. Rotating shaft No. 2; 33. Bearing sleeve; 4. Composite coating; 41. Bottom layer; 42. Middle layer; 43. Functional layer; 44. Surface layer. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0034] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] The technical solution of the present invention is further described below with reference to the accompanying drawings.

[0037] like Figure 1-8 As shown, the angle-adjustable artificial hip joint prosthesis structure includes a femoral connection component 1, an acetabulum connection component 2, and a movable part 3 movably connected between the femoral connection component 1 and the acetabulum connection component 2.

[0038] In this embodiment, the femoral connection component 1 includes a No. 1 connection unit 11 fixedly connected to the movable part 3, a femoral stem 12 detachably connected to the lower end of the No. 1 connection unit 11, and a connecting screw 13 fixedly connected to the upper end of the femoral stem 12 and threadedly connected to the No. 1 connection unit 11; the acetabulum connection component 2 includes a No. 2 connection unit 21 fixedly connected to the movable part 3, and an acetabulum 22 fixedly connected to the No. 2 connection unit 21; the movable part 3 includes a No. 1 rotating shaft 31 and a No. 2 rotating shaft 32, the No. 1 rotating shaft 31 and the No. 2 rotating shaft 32 are perpendicular to each other and are integrally formed, and both ends of the No. 1 rotating shaft 31 and the No. 2 rotating shaft 32 are fixedly connected to a bearing sleeve 33; the No. 1 connection unit 11 is fixedly connected to the bearing sleeve 33 on the No. 2 rotating shaft 32, and the No. 2 connection unit 21 is fixedly connected to the bearing sleeve 33 on the No. 1 rotating shaft 31; the No. 1 connection unit 11 includes a No. 1 connecting head 111, which is a U-shaped structure and is fixedly connected to the two bearing sleeves 33 on the No. 2 rotating shaft 32. The lower end of the No. 1 connecting head 111 is provided with a connecting screw hole 113 threadedly connected to the connecting screw 13, and the top of the No. 1 connecting head 111 is integrally formed with two symmetrically distributed No. 1 locking components 112; the No. 2 connecting unit 21 includes a No. 2 connecting head 211, which is a U-shaped structure and fixedly connected to the two bearing sleeves 33 on the No. 1 rotating shaft 31, and the top of the No. 2 connecting head 211 is integrally formed with a connecting rod 212, and the top of the connecting rod 212 is fixedly connected to an inner lining support 213, and the bottom of the No. 2 connecting head 211 is integrally formed with two symmetrically distributed No. 2 locking components 214; the inner lining support 213 is a hemispherical structure, and the acetabulum 22 is fixedly sleeved on the outside of the inner lining support 213.

[0039] Through the above solution: the movable part 3 composed of the No. 1 rotating shaft 31 and the No. 2 rotating shaft 32, and the bearing sleeve 33 are used to achieve a stable rotation connection, thereby avoiding the wear problem caused by long-term friction in the traditional ball-and-socket structure. The dual-axis structure not only provides a degree of freedom of movement similar to that of the human hip joint, but also improves the overall durability and service life through the reasonable selection of metal-metal or metal-polymer materials, and is suitable for the long-term use needs of patients of different age groups.

[0040] In this embodiment, the No. 2 locking assembly 214 includes a support base 2141 integrally formed at the bottom of the No. 2 connecting head 211, a sliding groove 2142 is provided on the support base 2141, and a locking stop 2143 is slidably connected in the sliding groove 2142, a positioning screw 2144 is threadedly inserted and connected on the support base 2141, and the locking stop 2143 is fixedly connected to the support base 2141 by the positioning screw 2144; three positioning holes 21431 are provided on the locking stop 2143 that are compatible with the positioning screw 2144, and one end of the locking stop 2143 is designed with an arc surface; the structure of the No. 1 locking assembly 112 is the same as that of the No. 2 locking assembly 214, and the connection method of the No. 1 locking assembly 112 and the No. 1 connecting head 111 is the same as the connection method of the No. 2 locking assembly 214 and the No. 2 connecting head 211.

[0041] According to the above scheme: before the operation begins, the doctor determines the appropriate parameters of acetabulum abduction angle and anteversion angle according to the patient's pelvic CT imaging data, and then loosens the positioning screw 2144 in the second locking component 214, pushes the locking block 2143 to slide along the slide groove 2142 to the appropriate position, so that it corresponds to the positioning holes 21431 of different angles, and completes the preset rotation angle of the acetabulum connection component 2. Similarly, the same operation is performed on the first locking component 112 to set the angle of the femoral connection component 1, so that the operator can adjust the angle of the femoral connection component 1 according to the patient's pelvic CT imaging data. According to the invention, the acetabulum abduction angle and anteversion angle can be flexibly adjusted before or during surgery, breaking through the limitation of traditional prosthesis angle fixation, realizing the transformation from "universal" to "personalized", and improving surgical flexibility and postoperative stability. In addition, the femoral stem 12 of appropriate specifications can be selected according to the patient's weight, bone thickness and other factors, and the connecting screw 13 at its upper end is screwed into the connecting screw hole 113 at the bottom of the No. 1 connecting head 111 to realize the detachable installation between the femoral stem 12 and the No. 1 connecting unit 11, thereby further improving the personalized matching ability of the prosthesis structure.

[0042] In this embodiment, the outer surfaces of the femoral stem 12 and the acetabulum 22 are coated with a composite coating 4; the composite coating 4 includes a bottom layer 41, an intermediate layer 42, a functional layer 43 and a surface layer 44 from the inside to the outside; the bottom layer 41 is a titanium oxide layer, the intermediate layer 42 is a hydroxyapatite HA layer, the functional layer 43 is a bioactive glass layer, and the surface layer 44 is a mixture containing collagen and specific growth factors; the specific growth factor is bone morphogenetic protein-2.

[0043] Through the above scheme: during the postoperative recovery process, the composite coating 4 located on the surface of the femoral stem 12 and the acetabulum 22 begins to play a role. The composite coating 4 includes, from the inside to the outside: a bottom layer 41 is a titanium oxide layer, which enhances the bonding strength between the substrate and the coating; an intermediate layer 42 is a hydroxyapatite HA layer, which promotes bone tissue attachment and growth; a functional layer 43 is a bioactive glass layer, which releases signal factors such as calcium ions to activate the osteogenic reaction; and a surface layer 44 contains collagen and bone morphogenetic protein-2, which accelerates the bone integration process and improves postoperative stability and recovery efficiency.

[0044] This embodiment includes a femoral connection component 1, an acetabulum connection component 2, and a movable member 3 movably connected therebetween. The overall structural design is novel, and multi-degree-of-freedom adjustment and personalized adaptation of the hip joint are achieved. The use process mainly includes the following steps:

[0045] S1. Before the operation begins, the doctor determines the appropriate acetabular abduction angle and anteversion angle parameters based on the patient's pelvic CT imaging data. The doctor then loosens the positioning screw 2144 in the second locking assembly 214 and pushes the locking block 2143 to slide along the slide groove 2142 to the appropriate position so that it corresponds to the positioning holes 21431 at different angles, thereby completing the preset rotation angle of the acetabular connection assembly 2. Similarly, the same operation is performed on the first locking assembly 112 to set the angle of the femoral connection assembly 1.

[0046] S2. Select a femoral stem 12 of appropriate specifications based on the patient's weight, bone thickness, and other factors, and screw the connecting screw 13 at its upper end into the connecting screw hole 113 at the bottom of the No. 1 connector 111 to achieve detachable installation between the femoral stem 12 and the No. 1 connecting unit 11, further improving the personalized matching capability of the prosthesis structure;

[0047] S3. After the assembled prosthesis structure is implanted in the human body, the first and second rotating shafts 31, 32 of the movable part 3 are perpendicular to each other and integrally formed, and are fixedly connected to the second connector 211 and the first connector 111 respectively through the bearing sleeve 33. This allows the two connectors to rotate relative to each other within a certain range, thereby achieving flexible angle adjustment of the hip joint in different directions to meet individual anatomical adaptation requirements.

[0048] S4. During the postoperative recovery process, the composite coating 4 located on the surface of the femoral stem 12 and the acetabulum 22 begins to play a role. The composite coating 4 includes, from the inside to the outside: a bottom layer 41 is a titanium oxide layer, which enhances the bonding strength between the substrate and the coating; an intermediate layer 42 is a hydroxyapatite HA layer, which promotes the attachment and growth of bone tissue; a functional layer 43 is a bioactive glass layer, which releases signal factors such as calcium ions to activate the osteogenic reaction; and a surface layer 44 contains collagen and bone morphogenetic protein-2, which accelerates the bone integration process and improves postoperative stability and recovery efficiency.

[0049] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An angle-adjustable artificial hip joint prosthesis structure, characterized by: The invention comprises a femoral connection component (1), an acetabulum connection component (2), and a movable part (3) movably connected between the femoral connection component (1) and the acetabulum connection component (2); the femoral connection component (1) comprises a No. 1 connection unit (11) fixedly connected to the movable part (3), a femoral stem (12) detachably connected to the lower end of the No. 1 connection unit (11), and a connecting screw (13) fixedly connected to the upper end of the femoral stem (12) and threadedly connected to the No. 1 connection unit (11); The acetabulum connection assembly (2) comprises a second connection unit (21) fixedly connected to the movable part (3), and an acetabulum (22) fixedly connected to the second connection unit (21); The movable member (3) comprises a first rotating shaft (31) and a second rotating shaft (32), wherein the first rotating shaft (31) and the second rotating shaft (32) are perpendicular to each other and are integrally formed, and both ends of the first rotating shaft (31) and the second rotating shaft (32) are fixedly connected with a bearing sleeve (33); The first connecting unit (11) is fixedly connected to the bearing sleeve (33) on the second rotating shaft (32), and the second connecting unit (21) is fixedly connected to the bearing sleeve (33) on the first rotating shaft (31).

2. The angle-adjustable artificial hip joint prosthesis structure according to claim 1, characterized in that: The No. 1 connecting unit (11) includes a No. 1 connecting head (111), which is a U-shaped structure and is fixedly connected to two bearing sleeves (33) on the No. 2 rotating shaft (32). The lower end of the No. 1 connecting head (111) is provided with a connecting screw hole (113) threadedly connected to the connecting screw (13), and the top of the No. 1 connecting head (111) is integrally formed with two symmetrically distributed No. 1 locking components (112).

3. The angle-adjustable artificial hip joint prosthesis structure according to claim 1, characterized in that: The second connecting unit (21) includes a second connecting head (211), the second connecting head (211) is a U-shaped structure and is fixedly connected to two bearing sleeves (33) on the first rotating shaft (31), a connecting rod (212) is integrally formed on the top of the second connecting head (211), an inner lining (213) is fixedly connected to the top of the connecting rod (212), and two symmetrically distributed second locking assemblies (214) are integrally formed on the bottom of the second connecting head (211).

4. The angle-adjustable artificial hip joint prosthesis structure according to claim 3, characterized in that: The inner lining (213) is a hemispherical structure, and the acetabulum (22) is fixedly sleeved on the outside of the inner lining (213).

5. The angle-adjustable artificial hip joint prosthesis structure according to claim 3, characterized in that: The second locking assembly (214) includes a support base (2141) integrally formed at the bottom of the second connector (211), a sliding groove (2142) is provided on the support base (2141), a locking block (2143) is slidably connected in the sliding groove (2142), a positioning screw (2144) is threadedly inserted into the support base (2141), and the locking block (2143) is fixedly connected in the support base (2141) by the positioning screw (2144).

6. The angle-adjustable artificial hip joint prosthesis structure according to claim 5, characterized in that: The locking block (2143) is provided with three positioning holes (21431) adapted to the positioning screws (2144), and one end of the locking block (2143) is designed as an arc surface.

7. The angle-adjustable artificial hip joint prosthesis structure according to claim 2, characterized in that: The structure of the No. 1 locking assembly (112) is the same as that of the No. 2 locking assembly (214), and the connection method between the No. 1 locking assembly (112) and the No. 1 connector (111) is the same as the connection method between the No. 2 locking assembly (214) and the No. 2 connector (211).

8. The angle-adjustable artificial hip joint prosthesis structure according to claim 1, characterized in that: The outer surfaces of the femoral stem (12) and the acetabulum (22) are both coated with a composite coating (4); the composite coating (4) comprises, from the inside to the outside, a bottom layer (41), an intermediate layer (42), a functional layer (43) and a surface layer (44).

9. The angle-adjustable artificial hip joint prosthesis structure according to claim 8, characterized in that: The bottom layer (41) is a titanium oxide layer, the middle layer (42) is a hydroxyapatite HA layer, the functional layer (43) is a bioactive glass layer, and the surface layer (44) is a mixture containing collagen and specific growth factors.

10. The angle-adjustable artificial hip joint prosthesis structure according to claim 9, characterized in that: The specific growth factor is bone morphogenetic protein-2.

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