Osteosynthesis device for trochanteric or trochanteric-diaphysea

Details Osteosynthesis device for trochanteric or trochanteric-diaphysea Osteosynthesis device for trochanteric or trochanteric-diaphysea

1994-05-17

1996-07-02

Pellegrino, Stephan C.

Surgery

Instruments

Orthopedic instrumentation

606 65, A61B 1776

Patent

active

055317480

ABSTRACT:
The device includes a medullary rod that is locked to a bone of a patient and that has at least one threaded hole with an axis parallel to the femoral neck of the bone, at least one self-drilling, self-tapping screw designed to pass through the hole in the rod and to engage the femoral neck of the bone, at least one sleeve designed to fit around a proximal end of the screw and to be threaded into the hole in the rod, and a shoulder on the sleeve for immobilizing the sleeve relative to the rod. According to the invention, the proximal end of the screw has a circular cross section which is formed to slide within a bore in the sleeve. Each sleeve has a threaded exterior portion which engages the threaded hole, and a proximal end portion shaped to allow the sleeve to be threaded into the hole in the rod. The shoulder on the sleeve bears against the rod to immobilize the sleeve relative to the rod when the sleeve has been fully threaded into the hole.

REFERENCES:
patent: 2381050 (1945-08-01), Hardinge
patent: 2834342 (1958-05-01), Yost
patent: 3530854 (1970-09-01), Kearney
patent: 4622959 (1986-11-01), Marcus
patent: 4827917 (1989-05-01), Brumfield
patent: 5032125 (1991-07-01), Durham et al.
patent: 5122141 (1992-06-01), Simpson et al.
patent: 5336223 (1994-08-01), Rogers

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