Stabilization member for stabilizing bones

Details Stabilization member for stabilizing bones Stabilization member for stabilizing bones

1990-07-16

1991-08-20

Frinks, Ronald

Surgery

Instruments

Orthopedic instrumentation

606 71, A61B 1756, A61B 1758

Patent

active

050411136

ABSTRACT:
The invention refers to a stabilization member serving for fixing broken or partly cracked bones in a predetermined position during the healing process or an even longer period. The stabilization member comprises a bar having elongated holes and the bar is fastened to the bone part to be stabilized by means of screws extending through the elongated holes. It is a drawback of such conventional stabilizing members that generally the screws can not be screwed in a direction perpendicular to the bar, because the screwing direction depends on the direction and form of the bone part. It is therefore intended to modify this conventional design such that a strong connection is obtained even in case that the screw does not extend in a direction perpendicular to the bar. To this end an intermediate piece is provided for each screw and the intermediate piece has one side resting on the bar and the other side being provided with a spherical segment-shaped recess receiving the spherical segment-shaped lower portion of the screw head.

REFERENCES:
patent: 3547114 (1970-12-01), Haboush
patent: 4388921 (1983-06-01), Sutter et al.
patent: 4683878 (1987-08-01), Carter
patent: 4913134 (1990-04-01), Luque

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