Support device for treating ONFH (osteonecrosis of femeral head)

Abstract

The invention discloses a support device for treating ONFH (osteonecrosis of femeral head). The support device comprises a hollow main nail, wherein the top end of the hollow main nail is a spherical surface; a cage-shaped opener is arranged at the lower end of the spherical surface at the top end of the hollow main nail; a propping solenoid is arranged at the lower end of the cage-shaped opener; the propping solenoid is fixed on the outer wall of the hollow main nail through a thread and can be adjusted up and down to compress the cage-shaped opener; and a closed tail cap is arranged at the bottom end of the hollow main nail. The traditional simple small-arc top support is changed into spherical support, and the spherical shape of the femoral head can be maintained better; and the deformation ability of the femoral head can be freely controlled by the operator, and the screw is controlled and tightened for adjustment according to the shape of an inner cavity of the bone. The structure can provide strong support to the femoral head at early stage to prevent the deformation of the femoral head; and at later stage, the clearances among the grids are favorable for the filling of bone particles and the revascularization in future, and finally the original bone, the new bone and the support device form a reinforced concrete type stereoscopic combination so as to obviously improve the therapeutic effect.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a support for treating necrosis of the femoral head. Background technique [0002] Femoral head necrosis is a common and frequently-occurring disease. In recent years, the number of cases of femoral head necrosis is on the rise. Femoral head necrosis occurs mostly in young and middle-aged patients. The treatment of femoral head necrosis is a difficult problem for orthopedics at present. Although there are many treatment methods , but the curative effect is unsatisfactory, and often further develops to collapse or the existing collapse will be further aggravated, and finally hip replacement surgery has to be performed. [0003] Although artificial hip replacement is relatively mature at present, since femoral head necrosis mostly occurs in patients aged 30 to 50 years, and the average service life of total hip replacement artificial joint is only 15 to 20 years, once joint...

AI Technical Summary

Problems solved by technology

Although the support area at the top of the supporter is larger than that before the umbrella leaves are stretched, the increased support area is still very limited

Moreover, there is a gap under the umbrella leaf, which is easy to form stress concentration

And it cannot form a strong support for the other subchondral plates other than the top

[0006] The shape of the femoral head necrosis in each patient is different, and the size of the inner cavity formed after curettage is different. The existing supporter cannot freely adjust the deformation degree of the head of the supporter according to the size of the cavity in the bone, so that the subchondral bone plate can be fully recovered. Azimuth effective support

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