Trochanter retention plate

Abstract

The invention relates to an implant for refixation of the greater trochanter (9) on which an osteotomy has been performed or which is fractured. The implant comprises a plate (1) that can be fixed on The invention relates to an implant for refixation of the greater trochanter (9) on which an osteotomy has been performed or which is fractured. The implant comprises a plate (1) that can be fixed onthe proximal femur, and a device (20) that can hold the greater trochanter (9) with a form fit or force fit on the femur (2). This holding device (20) preferably has bendable prongs (16, 17) located athe proximal femur, and a device (20) that can hold the greater trochanter (9) with a form fit or force fit on the femur (2). This holding device (20) preferably has bendable prongs (16, 17) located at a distance from each other, the first end portion of these prongs (16, 17) being attached to the upper edge (37) of the base plate (1). The holding device (20) also has flexible, elongate members (2t a distance from each other, the first end portion of these prongs (16, 17) being attached to the upper edge (37) of the base plate (1). The holding device (20) also has flexible, elongate members (21, 22), each of which is attached at one end to the free end portion (19) of the respective prong (16, 17). The other, free end portions (142) of the longitudinal members (21, 22) are secured laterall1, 22), each of which is attached at one end to the free end portion (19) of the respective prong (16, 17). The other, free end portions (142) of the longitudinal members (21, 22) are secured laterally on the base plate (1) after these longitudinal members (21, 22) have crossed the medial aspect of the greater trochanter. This results in a tensioning band construction with at least two restraintsy on the base plate (1) after these longitudinal members (21, 22) have crossed the medial aspect of the greater trochanter. This results in a tensioning band construction with at least two restraintsbased on a plate fixed securely on the proximal lateral femur.based on a plate fixed securely on the proximal lateral femur.

Description

technical field [0001] The present invention relates to an implant for refixing an osteotomized or fractured greater trochanter, a so-called trochanter retention plate, and to a graft for surgically refixing an osteotomized osteotomy using a trochanter retention plate. approach of the or fractured greater trochanter. Background technique [0002] Since the widespread adoption of hip endoprostheses in the 1950s and 1960s, various access approaches to the hip joint have been developed, among them osteotomy of the greater trochanter with subsequent refixation. Refixation of this important tendon of the gluteus medius and minimus as well as the different external rotators should be achieved anatomically after implantation of the prosthesis. Furthermore, the refixation of this important tendon should be withstanding the tension of the abductor muscles, which in certain cases can be equal to three times the body weight. For this purpose, various techniques have been developed. ...

AI Technical Summary

Problems solved by technology

Many of the grafts mentioned have not shown sufficient stability in clinical and / or biomechanical studies, or many of the grafts mentioned have suffered material failure during dynamic loading

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