SU1627171A1 - Wedge-shaped endoprosthesis of the hip joint acetabulum - Google Patents

Abstract

The invention relates to medical technology, namely to endoprosthesis joints of the human lower limb. The purpose of the invention is to increase the reliability of the endoprosthesis. The endoprosthesis consists of a hollow body 1, made in the form of a sectioned cone. The outer surface is surrounded by a spiral, like a thread, a ribbed protrusion 3 of variable cross section, which is divided by longitudinal along the housing axis 5 into large sections of a wedge shape. 3 il.

Description

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Yubbenko about the peak and the medical technician1, d specifically for the endoprosthesis of the joints of the lower end of the body.

Price, and (gain improved reliability of the baptism of the endoprosthesis.

Pa Fit 1 Yubrazhen wedge endopro- forg of the right depression of the hip joint, front end, Fit 2 - the same, end view, on flash 3, section A-A in FIG. 2

Flo.ibiH body 1 is made in the form of a truncated cone, the outer surface of which we rest on the helix like a thread of a ribbed protrusion 2, the pitch of which is constant throughout its length, but its cross section, beginning from the end of a smaller diameter and having the shape of an isosceles root ipolice 3. gradually increases (i) the expansion account of the base, in the repliat even the shape of the cross section nt of the isosceles triple arm turns into the wound -1 form. And the ribbed protrusion is completely transformed into a spirally wedge element, which longitudinally along the axis of the housing 1 of 1 mm 5 straight line or trapezoidal shape is divided into OTIC. 1X1HC 01 of the river b

(peach i venna is a feature of each such segment 6 sousyig in that they have whale shapes. A cut of each cut of the necKo.iiiKo is wider than the front edge of

On the body case I, 7 are made for iaxHdia uieiuia | s key when setting the protrusion during the operation, and in the cavity of the anoplain liner 8, spherical in which 9 serves as i for the endoproject

3nioii | X) ief 1kpo | s ems) sim UMI

In the process of operation, jumping ia is processed i iii, spit

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the cavity of the patient, and then, putting on the body 1 formed in the bone mass and taking the key beyond the grooves 7, screw it in until it stops. At the same time, the front sections of each segment 6, with their cutting front edges, cut into the bone mass the corresponding grooves into which the segments 6 of the ribbed protrusion 2 are screwed. However, due to the fact that all the segments 6 have a wedge shape and the intervals between the turns narrow, a simultaneously with the screwing of the case 1 its reliable spell in the acetabulum of the patient

The space on the surface of the housing 1 between the turns of the ribbed protrusion 2 can be covered with holes for subsequent bone tissue germination. When installing the endonrotea, the chips cut from the bone mass fill the free space between the segments 6 and also implant the endoprosthesis

Claims (1)

Invention Formula A wedge endoprosthesis of the acetabulum of the hip joint, containing a hollow body in the form of a truncated cone, in which is placed an insert with a spherical cavity open to the outside and on the surface of which a thread is made in the form of coils of a ribbed protrusion, characterized in that, in order to increase the reliability of the endoprosthesis, the ribbed the protrusion along its entire length is made with a variable cross section increasing towards the outer end, and is divided by slots into separate sections. XI-XI 9 eight