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Positioning aid in the form of a self-affixing test hip joint socket

A joint socket, self-fixation technology, applied in the direction of the hip joint, acetabular socket, joint implants, etc., can solve the problems of high cost and insufficient correction

Inactive Publication Date: 2015-06-03
施乐辉骨科用品股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this correction is relatively expensive and generally considered insufficient
If the correction is determined together by using different inserts, it is also considered disadvantageous to implement a choice of inserts that limits their variant possibilities

Method used

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  • Positioning aid in the form of a self-affixing test hip joint socket
  • Positioning aid in the form of a self-affixing test hip joint socket
  • Positioning aid in the form of a self-affixing test hip joint socket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] In the following description, the same reference numerals are used for identical and identically acting components.

[0038] figure 1 An oblique view of a self-fixating trial glenoid is shown. The shape of the self-fixating trial glenoid roughly conformed to half a hollow sphere. In the inserted state of the self-fixating trial glenoid, the outer surface 10 rests at least partially on a recess of the hip bone (not shown in the figure). The inner surface 11 is intended to receive an insert or a ball joint (the insert and the ball joint are not shown in the figure).

[0039] The self-fixating trial glenoid socket comprises a base body 12 and three retaining elements 13 . Alternatively, four or five or any desired number of retaining elements (not shown in the figure) can also be provided.

[0040] Base body 12 , which is preferably made of metal or a metal alloy, in particular steel, preferably instrument steel or a titanium alloy with sufficient elastic properties, f...

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PUM

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Abstract

The invention relates to a self-fixating trial socket for releasable insertion into a corresponding cavity in a hip bone. The self-fixating trial socket comprises an outer surface, which is matched to the cavity in the hip bone, an inner surface, which is matched to an inlay, especially a trial inlay, and / or to a ball joint head, for receiving the latter in the hip joint socket, especially self-fixating trial socket, and at least one holding element for fixating the hip joint socket in the cavity, the at least one holding element comprising at least one spring element which is constructed in such a way that in the inserted state the spring element exerts, at least in some places, an outwardly directed spring force on the cavity in the hip bone for releasable fixation of the hip joint socket.

Description

technical field [0001] The invention relates to a positioning aid in the form of a self-fixating trial hip socket. Background technique [0002] The hip socket is part of a traditional hip prosthesis that includes a thigh shaft implanted in the femur bone and a ball-joint head anchored to the thigh shaft. The ball joint is rotatably mounted in the hip joint socket. The hip socket is usually implanted in the hip pelvis, in which a shell-shaped metal anchor is inserted, into which is embedded a plastic body in which the hip ball is articulated. [0003] The hip socket (as described eg in DE 19714050 A1) is usually fixedly connected to the hip bone by means of one or more anchor pins or one or more screws. Other forms of anchoring of the glenoid fossa in bone are fixation by means of a screw thread on the shell (EP0601224B1) or by means of a press fit, which is achieved by a targeted interference of the metal shell with respect to the bearing of the prepared bone achieve. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/46
CPCA61F2/34A61F2/4609A61F2/4684A61F2002/30405A61F2002/30565A61F2002/30579A61F2002/30616A61F2002/3479A61F2002/4628
Inventor L·楚姆施泰格T·基尔舍曼
Owner 施乐辉骨科用品股份公司