CN210019808U

CN210019808U - Hip joint

Info

Publication number: CN210019808U
Application number: CN201920642067.3U
Authority: CN
Inventors: 王平
Original assignee: Shengda Qingjun Zhuolu Material Technology Co Ltd
Current assignee: Shengda Qingjun Zhuolu Material Technology Co Ltd
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2020-02-07
Anticipated expiration: 2029-05-07

Abstract

The utility model discloses a hip joint, which comprises a femoral head, a femoral neck, a femoral handle and a handle neck connector; the femoral head is inserted at the upper end of the femoral neck; the femoral neck is positioned above the femoral handle and is fixedly connected with the femoral handle through a handle neck connecting body; the femoral neck is in a round table shape, and the upper end surface of the femoral neck is smaller than the lower end surface; the upper end surface of the femoral neck is embedded with a convex ball head inserted link; the lower end surface of the femoral neck is embedded with a convex bone neck inserted bar. The utility model is of a sectional structure, which can reduce discomfort of uncoordinated thighs, dull pain and the like generated after operation; can reduce stress shielding of hip joint to femur, thereby preventing postoperative bone atrophy, fracture sequelae; the connection among the components of the hip joint is the fixed bolt connection, so that the hip joint is convenient and easy to operate, has good fixing effect and can prevent the relative rotation among the components of the hip joint; simple structure, can simplify the operation, reduce the operation time to alleviate anesthetic dose, reduce the intraoperative risk.

Description

Hip joint

Technical Field

The utility model relates to a joint especially relates to a hip joint.

Background

Conventional hip implant components are made of alloys or ceramics that have a greater specific gravity and hardness than human bone. Particularly, in the process of implanting the hip joint, the hip joint needs to be embedded into the bone marrow of the femur of a human body, and the implantation depth is needed to be deeper in order to ensure higher implantation stability, so that discomfort, dull pain or pain and other discomfort of a patient can be caused within a period of time after the operation. Especially, when only one hip joint is implanted, the discomfort is larger.

When osseointegration is complete, discomfort immediately upon implantation is reduced, but with subsequent bone atrophy due to stress shielding. Because the hip joint commonly used in the prior art is of an integrated structure, the stress shielding effect is obvious, a method for directly eliminating the stress shielding is not available, and the bone atrophy symptom is relieved only by means of postoperative recovery or reduction of transplanting time.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides a hip joint.

In order to solve the technical problem, the utility model discloses a technical scheme is: a hip joint comprises a femoral ball head, a femoral neck, a femoral handle and a handle neck connector; the femoral head is inserted at the upper end of the femoral neck; the femoral neck is positioned above the femoral handle and is fixedly connected with the femoral handle through a handle neck connecting body;

the femoral neck is in a round table shape, and the upper end surface of the femoral neck is smaller than the lower end surface; the upper end surface of the femoral neck is embedded with a convex ball head inserted link; a transverse first fixing hole is formed in the rod body of the ball head inserting rod; the number one fixing holes are two, and the two number one fixing holes are arranged up and down; the lower end surface of the femoral neck is embedded with a convex bone neck inserted link; a transverse second fixing hole is formed in the body of the bone neck inserting rod;

the upper end of the femoral stem is embedded with a raised stem inserted bar; a transverse third fixing hole is formed in the body of the bone handle inserted link; the lower end of the femoral stem is provided with a conical wedge head; a groove is arranged on the handle body of the femoral handle; the grooves are spirally distributed from top to bottom;

the right end of the handle neck connecting body is provided with a bone neck slot which is inclined upwards by 120-135 degrees, and the lower end of the handle neck connecting body is provided with a bone handle slot which is sunken upwards; the bone neck inserted link is inserted in the bone neck slot, the bone handle inserted link is inserted in the bone handle slot; a fourth fixing hole is formed in the left side or the right side of the bone neck slot; the fourth fixing hole is communicated with the bone neck slot and aligned with the second fixing hole; a fifth fixing hole is formed in the left side or the right side of the bone handle slot; the fifth fixing hole is communicated with the bone handle slot and is aligned with the third fixing hole;

the femoral head is spherical, and a ball head slot is formed in the femoral head; the ball head inserting rod is inserted in the ball head inserting groove; the left side and the right side of the ball head slot are both provided with a transverse number six fixing hole; the number six fixing holes are two, and the two number six fixing holes are aligned with the two number one fixing holes one by one;

fixing bolts are inserted into the interior of the first fixing hole, the interior of the second fixing hole and the interior of the third fixing hole, and the interior of the fourth fixing hole.

Furthermore, the material of the femoral neck and the femoral stem is polyether ether ketone.

Furthermore, the material of the handle neck connector is titanium alloy, cobalt-chromium alloy or zirconia ceramic.

Further, the length of the handle neck connecting body is 40-60% of the length of the femoral handle.

The utility model is of a sectional structure, and different parts are made of different materials, so that on one hand, the overall weight of the implanted hip joint can be reduced, and discomfort such as uncoordinated thighs and dull pain generated after operation can be reduced; on the other hand, the stress shielding of the hip joint to the femur can be reduced, thereby preventing postoperative bone atrophy, fracture and other sequelae; the connection among the components of the hip joint is the fixed bolt connection, so that the hip joint is convenient and easy to operate, has good fixing effect and can prevent the relative rotation among the components of the hip joint; simple structure, can simplify the operation, reduce the operation time to alleviate anesthetic dose, reduce the intraoperative risk.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is an exploded view of fig. 1.

FIG. 3 is a schematic view of the structure of the handle neck connector.

Fig. 4 is a schematic structural view of a femoral ball head.

In the figure: 1. a femoral head; 2. a femoral neck; 3. a femoral stem; 4. a handle neck connector; 5. a ball head inserted link; 6. a first fixing hole; 7. a bone neck insertion rod; 8. a second fixing hole; 9. a third fixing hole; 10. wedging; 11. a groove; 12. a bone neck slot; 13. a bone handle slot; 14. a fourth fixing hole; 15. a fifth fixing hole; 16. a ball head slot; 17. a number six fixed hole; 18. a fixing bolt; 19. the bone handle is inserted into the rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows a hip joint, which comprises a femoral ball head 1, a femoral neck 2, a femoral stem 3 and a stem neck connector 4; the femoral head 1 is inserted at the upper end of the femoral neck 2; the femoral neck 2 is positioned above the femoral handle 3 and is fixedly connected with the femoral handle through a handle neck connecting body; when the femoral head is used, the femoral head 1, the femoral neck 2, the femoral handle 3 and the handle neck connector 4 are sequentially and fixedly connected, the femoral handle is inserted into femoral bone marrow of a human body, and the femoral head is clamped in an acetabulum.

As shown in FIGS. 2-4, the femoral neck 2 has a truncated cone shape, and the upper end surface of the femoral neck is smaller than the lower end surface, so that the shape is beneficial to the connection of the femoral ball head and the handle neck connector and the transmission of the pressure from the body in the implanted hip joint; the upper end surface of the femoral neck is embedded with a convex ball head inserted link 5; the femur head 1 is spherical, a ball head slot 16 is arranged in the femur head, and a ball head inserted rod 5 is inserted in the ball head slot; a transverse first fixing hole 6 is formed in the rod body of the ball head inserting rod; the number one fixing holes are two, and the two number one fixing holes are arranged up and down; the left side and the right side of the ball head slot are both provided with a transverse number six fixing hole 17; the number six fixing holes are two, and the two number six fixing holes are aligned with the two number one fixing holes one by one; fixing bolts 18 are inserted into the six fixing holes and the first fixing hole, and the ball head inserted rod can be fixed in the ball head inserting groove by the fixing bolts, so that the fixed connection between the femoral neck and the femoral ball head is realized.

The lower end surface of the femoral neck is embedded with a convex bone neck inserted link 7; the right end of the handle neck connecting body 4 is provided with a bone neck slot 12 which is inclined upwards by 120-135 degrees, and a bone neck inserting rod is inserted into the bone neck slot; a transverse second fixing hole 8 is formed in the body of the bone neck inserting rod; a fourth fixing hole 14 is formed in the left side or the right side of the bone neck slot; the fourth fixing hole 14 is communicated with the bone neck slot and is aligned with the second fixing hole; fixing bolts 18 are inserted into the fourth fixing hole and the second fixing hole; the fixing bolt can fix the bone neck inserted bar in the bone neck slot, thereby realizing the fixed connection between the femur neck and the handle neck connector.

The upper end of the femoral stem 3 is embedded with a raised stem insert rod 19; the lower end of the handle neck connecting body 4 is provided with an upwards sunken bone handle slot 13, and a bone handle inserted rod is inserted in the bone handle slot; a transverse third fixing hole 9 is formed in the body of the bone handle inserted link; a fifth fixing hole 15 is formed in the left side or the right side of the bone handle slot; the fifth fixing hole is communicated with the bone handle slot and is aligned with the third fixing hole; the fixing bolts 18 are inserted into the fifth fixing hole and the third fixing hole, and the fixing bolts fixedly connect the femoral stem to the stem neck connecting body.

The femoral head, the femoral neck, the handle neck connector and the femoral handle are connected with the slot through the inserted rod and are fixed with the fixing bolt through the fixing hole, so that the hip joint is convenient to install, and the split type hip joint is beneficial to matching of different types, so that the implanted hip joint can adapt to different bone conditions of different patients. In addition, compare in the threaded connection between each part, the mode of adopting the gim peg is more firm, can guarantee that can not take place relative rotation between each handle neck connector and thighbone neck, the thighbone bulb, causes patient's discomfort on the one hand, reduces the life who implants the hip joint on the one hand.

The lower end of the femoral stem is provided with a conical wedge head 10 which can help the femoral stem to wedge into the marrow of the femur, reduce the burden of a doctor in the process of implantation surgery and reduce the injury to the body of a patient; the handle body of the femoral handle is provided with a groove 11; the grooves are spirally distributed from top to bottom; the spiral groove spirals around the stem body of the femoral stem and can provide a blood discharge path in the implantation process of the femoral stem, thereby facilitating the implantation of the femoral stem, further ensuring the faster implantation process and reducing the operation time.

Different from the prior art, the handle neck connector is formed by splitting the traditional femoral stem, the handle neck connector 4 is made of titanium alloy or cobalt-chromium alloy or zirconia ceramic, and the femoral neck 2 and the femoral stem 3 are made of polyether ether ketone. The specific gravity and the hardness of materials such as titanium alloy, zirconia ceramics and the like are larger than those of human bones and polyetheretherketone, so that the material of the handle neck connector is different from that of the femoral handle, the handle neck connector is not made of the materials such as titanium alloy, cobalt-chromium alloy, zirconia ceramics and the like with larger specific gravity, compared with the traditional hip joint implantation component, the weight of the component is greatly reduced, and accordingly dull pain and thigh discomfort caused by hip joint implantation can be reduced.

In addition, the polyether-ether-ketone is a high polymer material with biocompatibility, and can effectively reduce the discomfort symptoms of the implant to the human body when being used for the femoral neck and the femoral stem which are in contact with biological tissues. Particularly, the femoral neck part in the prior art is usually made of metal, the metal can corrode and generate abrasion powder in a human body, and the corroded metal and the abrasion powder can cause the relaxation and damage of the peripheral nervous system, so that the symptoms of arthralgia, bone joint discordance, tumor palpation, edema of lower limbs, paralysis of femoral nerves, dislocation, fracture, venous thrombosis and the like can be caused. The polyether-ether-ketone can not cause the adverse reaction, thereby accelerating the healing of the patient.

In addition, the length of the handle neck connecting body is 40-60% of the length of the femoral handle, and the hardness of the handle neck connecting body is high, so that the handle neck connecting body can bear high stress and transmit load to the proximal end of the femoral bone combined with the handle neck connecting body, thereby reducing the load transmitted to the femoral shaft part by the femoral handle, further reducing the stress shielding of the implanted hip joint to the femoral shaft, and finally preventing the femoral from being subjected to stress shielding for a long time to cause bone atrophy, fracture and other sequelae.

The utility model discloses compare the advantage that prior art has and do:

a. the hip joint bone handle implanted in the prior art is of an integrated structure, and the long-term use of the material with higher specific gravity is easy to cause the bone atrophy of the thigh bone of a patient; the material with lower specific gravity is difficult to provide support; the utility model is of a sectional structure, and different parts made of different materials can reduce the overall weight of the implanted hip joint, thereby reducing discomfort such as uncoordinated thighs and dull pain after operation; on the other hand, the stress shielding of the hip joint to the femur can be reduced, thereby preventing postoperative bone atrophy, fracture and other sequelae;

b. the connection among the components of the hip joint is the fixed bolt connection, so that the hip joint is convenient and easy to operate, has good fixing effect and can prevent the relative rotation among the components of the hip joint;

c. the utility model has simple structure, can simplify the operation and reduce the operation time, thereby reducing the anesthetic dosage and reducing the risks in the operation.

The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and the technical personnel in the technical field are in the present invention, which can also belong to the protection scope of the present invention.

Claims

1. A hip joint comprising a femoral ball head (1), characterized in that: the femoral neck connecting device also comprises a femoral neck (2), a femoral handle (3) and a handle neck connecting body (4); the femoral head (1) is inserted at the upper end of the femoral neck (2); the femoral neck (2) is positioned above the femoral handle (3), and the femoral neck and the femoral handle are fixedly connected through a handle neck connecting body;

the femoral neck (2) is in a round table shape, and the upper end surface of the femoral neck is smaller than the lower end surface; a convex ball head inserted bar (5) is embedded on the upper end surface of the femoral neck; a transverse first fixing hole (6) is formed in the rod body of the ball head inserting rod; the number one fixing holes is two, and the two number one fixing holes are arranged up and down; a raised bone neck inserting rod (7) is embedded on the lower end surface of the femoral neck; a transverse second fixing hole (8) is formed in the body of the bone neck inserting rod;

a raised bone handle inserted bar (19) is embedded at the upper end of the femoral handle (3); a transverse third fixing hole (9) is formed in the body of the bone handle inserted link; the lower end of the femoral stem is provided with a conical wedge head (10); a groove (11) is formed in the handle body of the femoral handle; the grooves are spirally distributed from top to bottom;

the right end of the handle neck connecting body (4) is provided with a bone neck slot (12) which is inclined upwards by 120-135 degrees, and the lower end is provided with a bone handle slot (13) which is concave upwards; the bone neck inserted link is inserted in the bone neck slot, and the bone handle inserted link is inserted in the bone handle slot; a fourth fixing hole (14) is formed in the left side or the right side of the bone neck slot; the fourth fixing hole (14) is communicated with the bone neck slot, and the fourth fixing hole is aligned with the second fixing hole; a fifth fixing hole (15) is formed in the left side or the right side of the bone handle slot; the fifth fixing hole is communicated with the bone handle slot, and the fifth fixing hole is aligned with the third fixing hole;

the femur head (1) is spherical, and a head slot (16) is formed in the femur head; the ball head inserting rod (5) is inserted into the ball head inserting groove; the left side and the right side of the ball head slot are both provided with a transverse number six fixing hole (17); the number six fixing holes are two, and the two number six fixing holes are aligned with the two number one fixing holes one by one;

and fixing bolts (18) are inserted into the interior of the first fixing hole and the interior of the first fixing hole, the interior of the fifth fixing hole and the interior of the third fixing hole and the interior of the fourth fixing hole and the interior of the second fixing hole.

2. The hip joint according to claim 1, wherein: the femoral neck (2) and the femoral stem (3) are made of polyether ether ketone.

3. The hip joint according to claim 1, wherein: the handle neck connector (4) is made of titanium alloy or cobalt-chromium alloy or zirconia ceramic.

4. The hip joint according to claim 1 or 3, characterized in that: the length of the handle neck connecting body is 40-60% of the length of the femoral handle.