CN212308137U

CN212308137U - Protection structure for protecting human femoral head to bear pressure

Info

Publication number: CN212308137U
Application number: CN202020565779.2U
Authority: CN
Inventors: 赵滨; 范士洁; 吕信息; 乔俊钊
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2021-01-08
Anticipated expiration: 2030-04-16

Abstract

The utility model provides a protection architecture of human femoral head bearing pressure of protection, including the protection casing, the protection casing is with human femoral head form, the similar hemisphere structure of size, a thighbone head for the thighbone near-end is located to the cover, outside sphere and human acetabular bone inner face or cartilage face phase-match, in order to alleviate the damage to the acetabular bone articular surface, the edge extension, the inboard of protection casing open end reachs little tuberosity top and holds through little tuberosity through the thighbone neck, the outside of protection casing open end extends to big tuberosity saddle portion, close with the appearance form of thighbone near-end tuberosity, in order to ride striding at big tuberosity saddle portion, bearing pressure, the place ahead and the rear of protection casing open end extend to tuberosity boundary line department, the screw can all be squeezed into as required to above-mentioned extension architecture. The support structure aims to solve the problems that the existing support structures are not matched with and matched with the necrotic area of the femoral head in shape, so that the local area of the support is insufficient, the strength is inconsistent, and partial necrotic area cannot be effectively supported, thereby influencing the treatment effect. Belongs to the technical field of femoral head repair.

Description

Protection structure for protecting human femoral head to bear pressure

Technical Field

The utility model provides a femoral head protection structure belongs to femoral head pathological change protection and restoration field.

Background

The early and middle stages of femoral head necrosis, including traumatic and non-traumatic, mainly show that crescent and semicircular cystic changes occur due to local blood circulation disorder and necrosis, the local strength is reduced, the support to the human body cannot be born, subchondral microfracture and local collapse gradually occur, the spherical femoral head becomes uneven and unsmooth, the spherical femoral head loses the matching with acetabulum, finally, articular cartilage abrasion and destruction are formed, and in a series of changes, patients can suffer from pain and dysfunction. The early and middle period of operation treatment aims to keep the femoral head from collapsing and deforming; the common method comprises the following steps: 1) decompressing the medulla; 2) various defects are filled and local strength is supported, such as fibula, ilium blocks, tuberosity blocks and the like with/without blood vessels or a finished product made of tantalum metal, namely a tantalum rod or a rod is used for supporting, and after the titanium rod or the rod is implanted into a femoral head necrosis area, the implanted material and surrounding bones can grow together and be fused into a whole so as to prevent lesion development or achieve the aim of healing.

The current cognition is that the medullary heart decompression can relieve the disease condition, but has no supporting function and can not prevent the progress and the deterioration of the disease condition, and the current various bone grafting or tantalum metal finished products have certain limitations and certain complications, and have the common defects that the filling is incomplete and inaccurate in local part, the supporting strength is not enough, and the like, so that the disease condition of a part of patients is continuously aggravated, mainly collapses, and finally only the artificial hip joint replacement is received. Because the tantalum rod or the autologous/allogenic fibula and the like which can provide stronger support at present have inherent structures, the inherent structures are not matched and matched with the necrotic area of the femoral head in shape, the local area of the support is insufficient, the strength is inconsistent, and partial necrotic area can not be effectively supported, so that the treatment effect is influenced.

Disclosure of Invention

The utility model aims to provide a: the protective structure can protect the femoral head mechanically when the femoral head is diseased or damaged so as to solve the problems that the existing femoral head necrosis lacks supporting force in early and middle stages, the supporting method is unreasonable, the existing supporting structures have inherent structures, are not matched and matched with the femoral head necrosis region morphologically, so that the local area of the support is insufficient, the strength is inconsistent, partial necrosis regions cannot be effectively supported, collapse occurs, and the treatment effect is influenced.

In order to solve the problems, the protective structure for protecting the femoral head to bear pressure comprises a protective cover, wherein the protective cover is of a similar hemispherical structure which is similar to the shape and size of the human femoral head and is used for being sleeved on the femoral head at the proximal end of the femur, the outer side spherical surface is matched with the inner surface or cartilage surface of the acetabulum of the human body so as to reduce the damage to the joint surface of the acetabulum, the edge of the protective cover extends, the inner side of the opening end of the protective cover reaches the upper part of the small tuberosity through the femoral neck and is supported by the small tuberosity, the outer side of the opening end of the protective cover extends to the saddle part of the large tuberosity which is similar to the shape of the large tuberosity at the proximal end of the femur so as to straddle the saddle part of the large tuberosity to bear the pressure.

In the protection structure, the protection cover is made of metal or plastic and other materials which meet the medical human body implantation material standard, 4-6 screw holes are formed in the lower section of the protection cover and are used as locking screw holes, the protection cover is fixed on the proximal section of the femur through the screw holes, so that the force born by the hip joint is directly transmitted to the upper side of the proximal end of the femur through the protection cover 1, the stress on the femoral head bearing surface is reduced or eliminated, and the damaged area of the femoral head is protected from being pressed and collapsed. The protective cover and the acetabulum form a joint, so that the lower limb has certain degree of mobility.

Compared with the prior art, the utility model designs the protective cover that the joint sleeve is fixed at the proximal section of the femur, and the stress of the femoral head can be transmitted to the femur at the proximal end of the femur by using the protective cover, thereby reducing or avoiding the collapse caused by the larger oppression on the necrotic area or the damaged area of the femoral head; the femoral head necrosis area is repaired for a certain time, thereby effectively preventing the collapse of the femoral head and preventing the progress of pathological changes.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Detailed Description

In order to make the explanation of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings.

Examples

Referring to fig. 1, the present embodiment provides a protective structure for protecting a femoral head against pressure, including a protective cover 1, the protective cover 1 is a quasi-hemispherical structure with a shape and a size similar to those of a human femoral head, and is configured to be sleeved on a femoral head at a proximal end of a femur, an outer side spherical surface of the protective cover 1 is matched with an inner surface or a cartilage surface of an acetabulum of a human body to reduce damage to an acetabulum joint surface, and an edge of the protective cover extends, an inner side of an open end of the protective cover 1 reaches a position above a small tuberosity through a femoral neck and is supported by the small tuberosity, an outer side of the open end of the protective cover 1 extends to a large tuberosity saddle portion, and is similar to an outer shape of the large tuberosity at the proximal end of the femur to straddle the large tuberosity saddle portion to bear.

The protective cover is made of metal or plastic and other materials which meet the medical human body implantation material standard, 4-6 screw holes are formed in the lower section of the protective cover and are used as locking screw holes, the protective cover is fixed on the proximal section of the femur through screws, so that the force borne by the hip joint is directly transmitted to the upper side of the proximal end of the femur through the protective cover 1, the stress on the femoral head bearing surface is reduced or eliminated, and the damaged area of the femoral head is protected from being pressed and collapsed. The protective cover and the acetabulum form a joint, so that the lower limb has certain degree of mobility.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. A protective structure for protecting the femoral head of a human body against pressure is characterized in that: the protective cover comprises a protective cover (1), wherein the protective cover (1) is of a quasi-hemispherical structure close to the shape and size of a femoral head of a human body and is used for being sleeved on the femoral head of a femoral proximal end, an outer side spherical surface is matched with an inner surface or a cartilage surface of the acetabulum of the human body so as to form joint surface activity with the acetabulum and reduce damage to the cartilage surface of the acetabulum, the edge of the protective cover extends, the inner side of an opening end of the protective cover (1) reaches the upper part of a small tuberosity through a femoral neck and is supported by the small tuberosity, the outer side of the opening end of the protective cover (1) extends to a large tuberosity saddle part and is close to the shape of the large tuberosity of the femoral proximal end so as to straddle the large tuberosity saddle.

2. A protective structure according to claim 1 for protecting a femoral head of a human subject against pressure, wherein: the protective cover (1) is made of metal materials or plastics which accord with the medical human body implantation material standard, and 4-6 screw holes (11) are arranged on the lower section extension part of the protective cover (1) and are locking screw holes and fixed on the proximal section of the femur through screws.