A kind of femoral head prosthesisTechnical field
The present invention relates to a kind of femoral head prosthesis, particularly relate to a kind of femoral head prosthesis for femoral head necrosis surgery.
Background technology
Femoral head prosthesis is used to the surgical implant replacing human hip partial femoral head.At present, existing femoral head prosthesis need combinationally use with femoral stem, full acetabular bone, performs the operation for hip joint half hip replacement.
Above-mentioned hip joint, though alternative femoral hip prosthesis head part, has progressive, but finds also there is some shortcomings in its structure when reality uses, and cause this femoral head prosthesis to have limitation, its shortcoming comprises:
1) use of patient covers a people group of mean people, existing hip prosthesis is single formula structure, tandem product, its femoral head shape ratio is fixing, cannot regulate, but in fact the femoral head of patient has multifarious feature, therefore hip prosthesis can only meet an a kind of patient of femoral head form, and its scope of application will be subject to significant limitation.
2) wound area is large, and existing femoral head replacement needs to install femoral stem, femoral head and full acetabular bone, and corresponding osteotomy increases, and destroys existing good osseous tissue;
3) need to install fixing accurately according to the femoral head of personal settings, need identical osteotomy site during installation, otherwise there will be excessive wear and wear particle, most of femur head necrosis is subsided case, personalized femoral head cannot be used.
Summary of the invention
The object of the present invention is to provide a kind of fixation, replace the femoral head prosthesis of necrotic femoral head.
For achieving the above object, the concrete technical scheme of a kind of femoral head prosthesis of the present invention is:
A kind of femoral head prosthesis, implant and be fixed on the femoral head in patient, the side of femoral head prosthesis is provided with multiple projection, and projection can be inserted on femoral head with resected femur head prosthesis; Protruding both sides are provided with bone trabecula, and bone trabecula contacts with femoral head, and bone trabecular surface is matsurface, is fixed in femoral head to make femoral head prosthesis.
Further, the outer surface of femoral head prosthesis is even surface, with anti-wear generation granule.
Further, the protruding both sides on femoral head prosthesis are provided with fixing hole, and fixing hole is the through hole on bone trabecula, and femoral head prosthesis can be fixed on femoral head through fixing hole by fixture.
Further, fixture can be screw, and femoral head prosthesis is fixed on femoral head through fixing hole by screw.
Further, protruding cylindrical, multiple projecting parallel is arranged on femoral head prosthesis.
Further, adjacent two protruding length are not identical.
The advantage of a kind of femoral head prosthesis of the present invention is:
1) femoral head prosthesis has good wearability and biocompatibility;
2) fixed by Embedded agnail and screw, there is good stability;
3) surface forms burnishing surface by polishing, reduces the generation of abrasion and wear particle;
4) joint contact face is trabecular bone structure, adds roughness, is convenient to osteogenesis;
5) X-ray by sufferer carries out customized according to necrotic femoral head to the shape of femoral head prosthesis, makes the femoral head prosthesis highly meeting sufferer;
6) overcome the present situation that existing femur head necrosis needs to replace a set of hip joint, do not need femoral stem and full acetabular bone;
7) femoral head generation pathological changes is downright bad, only need by the partial femoral head of necrosis excision displacement, retain good femoral head, solve young patient because of osteotomy amount large, the problem of stability at later stage, wider to the scope of application of patient, Using prosthesis is convenient, wound area is little, and have good Bone Ingrowth, Late curative effect is more remarkable.
Accompanying drawing explanation
Fig. 1 is the structural representation of femoral head prosthesis of the present invention;
Fig. 2 is the left view of femoral head prosthesis in Fig. 1.
Detailed description of the invention
In order to better understand object of the present invention, structure and function, below in conjunction with accompanying drawing, further detailed description is done to a kind of femoral head prosthesis of the present invention.
As depicted in figs. 1 and 2, it shows for a kind of femoral head prosthesis of the present invention, for replacing the femoral head that pathological changes necrosis occurs, implant and be fixed on the good femoral head in patient, one side of femoral head prosthesis 1 is provided with multiple protruding 2, and protruding 2 can insert on femoral head with resected femur head prosthesis 1; The outer surface of femoral head prosthesis 1 becomes even surface 3 by polishing, in case friction and wear causes producing granule; The both sides of protruding 2 are provided with bone trabecula, and bone trabecula contacts with femoral head, bone trabecular rough surface, adds the roughness of femoral head prosthesis 1, is conducive to femoral head prosthesis and grows in femoral head.
Further, projection 2 both sides on femoral head prosthesis 1 are provided with fixing hole 5, and fixing hole 5 is the through hole on bone trabecula, and femoral head prosthesis 1 can be fixed on femoral head through fixing hole 5 by fixture, to be inserted in femoral head by stable for projection, there is good stability.Wherein, fixture can be screw, and femoral head prosthesis is fixed in femoral head through fixing hole by screw.
Further, protruding 2 cylindrical, multiple protruding 2 are arranged in parallelly arranged on femoral head prosthesis 1.In addition, the length of two adjacent projections 2 is not identical.
Further, the shape of femoral head prosthesis 1 can customize according to the X-ray situation of sufferer, make the femoral head prosthesis meeting sufferer necrotic femoral head shape before surgery, by necrotic femoral head excision in femoral head, be left the good femoral head of pathological changes necrosis, then femoral head prosthesis is fit in good femoral head.
Femoral head prosthesis of the present invention, femoral head prosthesis has good wearability and biocompatibility; Fixed by Embedded agnail and screw, there is good stability; Surface forms burnishing surface by polishing, reduces the generation of abrasion and wear particle; Joint contact face is trabecular bone structure, adds roughness, is convenient to osteogenesis; X-ray by sufferer carries out customized according to necrotic femoral head to the shape of femoral head prosthesis, makes the femoral head prosthesis highly meeting sufferer; Overcome the present situation that existing femur head necrosis needs to replace a set of hip joint, do not need femoral stem and full acetabular bone; Femoral head generation pathological changes is downright bad, only need by the partial femoral head of necrosis excision displacement, retain good femoral head, solve young patient because of osteotomy amount large, the problem of stability at later stage, wider to the scope of application of patient, Using prosthesis is convenient, wound area is little, and have good Bone Ingrowth, Late curative effect is more remarkable.
Further describe invention has been by specific embodiment above; but it should be understood that; here concrete description; should not be construed as the restriction to the spirit and scope of the invention; one of ordinary skilled in the art to the various amendments that above-described embodiment is made, belongs to the scope that the present invention protects after reading this specification.