CN104814814B - A support device for treating femoral head necrosis - Google Patents

Abstract

The invention discloses a supporting device for the treatment of femoral head necrosis, and the device comprises a supporting apparatus and a bone fracture plate. The supporting apparatus comprises a head part, a body part, and a tail part. The head part is a bent hemisphere with gyrus, and the body part is cylindrical. The head part, the body part and the tail part are connected to form a body, and the interior of the body is hollow. The walls of the head part and the body part are provided with a plurality of hexagonal hollow-out through holes, and the inner walls of the tail part and the body part are provided with a mesh support. A hollow pipe of the body part extends outwards from the tail part. The bone fracture plate is matched with a femur, and is provided with a sleeve. During an operation, a necrotic bone tissue is removed at first, so as to place the supporting apparatus. The hollow pipe extends to the interior of the sleeve of the bone fracture plate, and bone putty is injected in the mesh support. A flow guide cable is buried in the hollow inner cavity of the supporting apparatus. The device improves the fixing of the bone fracture plate, enables a patient to bear a load and recover in advance, and achieves the treatment of femoral head necrosis from the pathology of blood supply improvement and the reduction of bone core pressure.

Description

A support device for treating femoral head necrosis

technical field

The invention relates to a support device used for treating femoral head necrosis in the orthopedics department of a hospital.

Background technique

In the existing clinical cases, the common necrosis of the femoral head is mainly caused by avascular necrosis of the femoral head (ANFH) due to various etiologies destroying the blood supply of the femoral head, resulting in osteonecrosis of the femoral head. In the pathological process, after osteonecrosis of the femoral head, the body naturally repairs the necrotic area, the necrotic bone trabecula is gradually absorbed, the mechanical strength of the femoral head decreases, causing collapse and deformation, resulting in serious damage to the hip joint and decreased support performance. Under the condition, the subchondral bone can bear abnormal stress, cause the articular surface to collapse, and hip osteoarthritis occurs, which seriously affects the function of the hip joint and affects the quality of life of the patient.

At present, there are three modes of treatment for femoral head necrosis: early treatment, that is, treatment aimed at the cause, that is, by finding the cause and removing the cause. This method is the most thorough and ideal, but among the causes of femoral head necrosis, clear or There are many things that are not clear, and many causes are still being explored, let alone the treatment for the cause; mid-term treatment, that is, to adopt certain methods for patients who already have symptoms, from intervening, preventing or delaying collapse, delaying or avoiding Artificial joint replacement is the focus of the current research; post-remedial treatment is also a last resort, that is, after the femoral head necrosis collapses, hip osteoarthritis, hip joint pain, and mobility impairment occur, which affects the patient. Quality of life, only with joint replacement. Hip replacements are traumatic and expensive.

The existing technology closest to the present invention is: in the early stage of collapse, the elasticity of the cartilage is still good, and the subchondral bone is not collapsed. At this time, the sequestrum is removed through surgery, and a support is placed to support the subchondral bone through the decompression channel. , Improve the anti-collapse ability of the femoral head, prevent the collapse of the device, and restart the repair potential of the inner bone of the femoral head by implanting autologous cancellous bone. The devices and technologies used include patent No. ZL200810111686.6 and invention patent No. ZL2010202833869, among which ZL200810111686.6 discloses a support for femoral head necrosis. 800 microns, the shaft center is solid; the invention patent with the patent number ZL2010202833869 discloses an inner mesh supporter for femoral head necrosis, which is a hollow member with a mesh structure made of titanium-nickel memory alloy. The shape of the component is consistent with the inner medullary cavity of the femoral head, and it can be deformed by changing the temperature, which is convenient for implantation. It is integrated to realize and strengthen the effective support for the collapsed femoral head, and prevent or delay the collapse and necrosis of the femoral head.

The disadvantages are: the invention patent with the patent number ZL200810111686.6, the supporter has a small aperture, the trabecular bone that grows in is relatively slender, and the effect of bearing pressure is limited, and the axial center part is solid, which occupies more limited marrow Inner space; the support function is not good enough to prevent or delay the femoral head necrosis and collapse, and it has been rarely used in recent years; the patent number is ZL2010202833869. The supporter requires a small volume and is difficult to remember the alloy wire. It is braided with fine memory alloy wire, and its supporting performance is limited. It has been proved by experiments that the scheme of using memory alloy wire as an inner mesh supporter is not feasible.

Contents of the invention

The technical problem mainly solved by the present invention is to provide a support device for the treatment of femoral head necrosis, which can reduce the growth stress of bone tissue while improving the effective physical support and positioning of the collapsed femoral head, so that patients can recover early. Load-bearing healing, and treatment of continued subsidence and necrosis of the femoral head from the pathological perspectives of improving blood supply, reducing intramedullary pressure, and dredging intramedullary occlusion, avoiding artificial joint replacement, reducing patient pain, reducing economic burden, and improving patient quality of life.

In order to solve the above-mentioned technical problems, the main technical problem to be solved by the present invention is to provide a support device for treating femoral head necrosis, which is made of titanium-nickel alloy and includes: a support and a bone plate; the support includes a head , body and tail; the head is a curved hemispherical body with grooves, and the body is cylindrical; the head, body and tail are integrated, and the inside is hollow, the There are a plurality of hexagonal hollow through holes on the head and the body wall, the angle between the head and the central axis of the body forms an obtuse angle, and the tail and the inner wall of the body have a mesh support, and the mesh support is A hexagonal honeycomb structure, and one end of another three sides in the hexagon intersects at the center of the hexagon, and the other ends of the three sides are respectively connected to non-adjacent vertices of the hexagon; the head of the supporter The hemisphere is placed upwards, which can realize and strengthen the effective support for the collapsed femoral head; the hollow inner cavity of the supporter is provided with drainage ropes, and the bone pulp can be poured into the mesh support; the bone plate matches the femur , a sleeve and a plurality of screw locking holes are arranged on it; the hollow tube of the body part of the supporter extends outward from the tail, and the extension part is placed in the sleeve on the bone plate.

Preferably, there is no through hole in the wall of the extension part of the supporter, so as to improve the strength of the extension part.

Preferably, a cross groove is provided on the end surface of the extension part of the supporter.

Preferably, the supporter is used in combination with the bone plate to position the supporter and allow the supporter to move within a certain range, so as to increase the weight bearing, grow and heal the bone lesion, and buffer the pressure.

The beneficial effects of the present invention are: the combined use of the supporter and the bone plate can improve the effective physical support and strengthen the positioning of the collapsed femoral head, and at the same time reduce the growth stress of the bone tissue, so that the patient can heal early under load, and improve the blood supply. , Reduce the pressure of the bone core and clear the intramedullary occlusion pathologically treat the continued subsidence and necrosis of the femoral head, avoid artificial joint replacement, reduce the pain of the patient, reduce the economic burden, and improve the quality of life of the patient.

Description of drawings

Fig. 1 is the main sectional structure schematic diagram of the supporting device for the treatment of femoral head necrosis according to the present invention;

Fig. 2 is a schematic cross-sectional view of the tail end 3 of Fig. 1;

Fig. 3 is a schematic view of the embodiment of the supporting device for the treatment of femoral head necrosis according to the present invention;

Among them, 1. head; 2. body; 3. tail; 4. cross groove; 5. through hole; 6. supporter; 7. femoral head and neck; 8. mesh support; , bone plate; 11, sleeve; 12, screw locking hole; 13, extension.

detailed description

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

As shown in Figures 1-3, an embodiment of the present invention is a supporting device for treating femoral head necrosis, which is made of titanium-nickel alloy, and includes: a supporter 6 and a bone plate 10; the supporter 6 includes, Head 1, body 2 and tail 3; the head 1 is a curved hemispherical body with grooves, and the body 2 is cylindrical; the head 1, body 2 and tail 3 are connected to form One body, and the interior is hollow, there are a plurality of hexagonal hollow through holes 5 on the wall of the head 1 and the body 2, the angle between the head 1 and the central axis of the body 2 forms an obtuse angle, and the tail 3 And the inner wall of the body 2 has a mesh support 8, the mesh support 8 is a hexagonal honeycomb structure, and one end of three sides intersects at the center of the hexagon in the hexagon, and the three sides The other ends are respectively connected to the non-adjacent vertices of the hexagon; the hemisphere of the head 1 of the supporter 6 is placed upwards, which can realize and strengthen the effective support for the collapsed femoral head; the hollow inner cavity of the supporter 6 is set Drainage rope 9 is provided, and bone slurry can be poured into the mesh support 8; the bone plate 10 is matched with the femur, and a sleeve 11 and a plurality of screw locking holes 12 are arranged on it; the body part 2 of the supporter 6 The empty tube extends outward from the tail, and the extension 13 is placed in the sleeve 11 on the bone plate 10; there is no through hole on the wall of the extension 13 of the supporter 6, so as to improve the strength of the extension 13, and the extension 13 The tail is provided with a cross groove 4; the supporter 6 is used in combination with the bone plate 10, which can position the supporter 6 and allow the supporter 6 to move within a certain range, so as to facilitate the increase of load and the growth of bone damage Healing and buffer against stress.

The working process of the supporting device for treating femoral head necrosis according to the present invention is as follows:

In Fig. 1-3, after removing the necrotic bone tissue in the bone marrow cavity of the femur, the supporter 6 is placed in the bone marrow cavity, the hemisphere of the head 1 is placed upwards, and the hollow tube extension 13 is placed in the bone marrow cavity. In the sleeve 11 of the bone plate 10, pour the bone slurry into the grid of the mesh support 8, then embed the drainage cord 9 into the hollow cavity of the supporter 6, extend the tail of the drainage cord 9 to the soft tissue muscle, and then suture .

In a support device for treating femoral head necrosis according to the present invention, the combined use of the supporter 6 and the bone plate 10 can reduce the growth of bone tissue while improving the effective physical support and positioning of the collapsed femoral head. Stress, so that patients can heal early with weight bearing, and treat the continued subsidence and necrosis of the femoral head from the pathological aspects of improving blood supply, reducing bone core pressure and dredging intramedullary occlusion, avoiding artificial joint replacement, reducing patient pain, reducing economic burden, and improving patient quality. The quality of life provides a new method and new device for the treatment of femoral head necrosis and collapse.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (4)

1. A support device for treating femoral head necrosis, which is made of titanium-nickel alloy, comprising: a support (6) and a bone plate (10); the support (6) includes a head (1), body (2) and tail (3); the head (1) is a curved hemisphere with grooves, and the body (2) is cylindrical; the head (1), body (2) is integrated with the tail (3), and the interior is hollowed out. There are a plurality of hexagonal hollow through holes (5) on the walls of the head (1) and body (2). (1) The angle between the central axis of the body (2) forms an obtuse angle, and the inner wall of the tail (3) and the body (2) has a mesh support (8), and the mesh support (8) is a hexagon Shaped honeycomb structure, and in the hexagon, one end of another three sides intersects at the center of the hexagon, and the other ends of the three sides are respectively connected to non-adjacent vertices of the hexagon; the head of the supporter (6) (1) The hemisphere is placed upwards, which can realize and strengthen the effective support for the collapsed femoral head; the hollow inner cavity of the supporter (6) is provided with a drainage cable (9), and the mesh support (8) Bone slurry can be poured into; the bone plate (10) is matched with the femur, and a sleeve (11) and a plurality of screw locking holes (12) are arranged on it; the feature is that the body (2) of the supporter (6) ) The hollow tube extends outward from the tail, and the extension (13) is placed in the sleeve (11) on the bone plate (10). 2. A support device for treating femoral head necrosis according to claim 1, characterized in that there is no through hole in the wall of the extension part (13) of the supporter (6), so as to improve the strength of the extension part (13) . 3. A supporting device for treating necrosis of the femoral head according to claim 1 or 2, characterized in that a cross groove (4) is provided on the end surface of the extension part (13) of the supporter (6). 4. A support device for treating femoral head necrosis according to claim 1, characterized in that the support (6) is used in combination with the bone plate (10), allowing the support (6) to be positioned simultaneously, It also allows the supporter (6) to move within a certain range, so as to facilitate the increase of load, the growth and healing of bone damage and the buffering of pressure.