External bone fixation system

摘要

An external fixation assembly for bone fusion or separation is disclosed. The assembly includes a fracture fusion tube, with a bracket slidably engaged thereon. The assembly further includes a collet clamp connected to the bracket, with a ball collet rotatably seated within the clamp, the ball collet having an aperture for receiving a bone bin therethrough and perforations for a compression engagement with a bone pin. The assembly uses a single screw for threadably engaging the ball collet, the clamp and the bracket such that the position of the bone pin, ball collet and bracket are all fixed.

主权项

1. An external bone fixation system for attaching to multiple bone pins, the system comprising:
a fracture fusion tube having at least one of a recess or a detent disposed along a length of the fracture fusion tube; and multiple bracket/clamp assemblies removably attached to the fracture fusion tube, wherein each of the bracket/clamp assemblies comprises:
a bracket slideably attached to the fracture fusion tube, the bracket having a structure that includes a threaded bracket support aperture and a bracket throughbore;a pin collet clamp fixed to, and independently rotatable relative to, the bracket, the pin collet clamp including a threaded clamp support aperture and a clamp throughbore;a sleeve disposed in the clamp throughbore;a ball collet rotatably disposed within the sleeve, and defining an aperture for receiving one of the multiple bone pins therethrough, the direction of the aperture being independently adjustable across multiple planes relative to the bracket and the pin collet clamp; anda single screw for threadably engaging the pin collet clamp and the bracket via the clamp support aperture and the bracket support aperturewherein tightening the single screw within the clamp support aperture and the bracket support aperture simultaneously tightens the bracket in its attachment to the fracture fusion tube, tightens the bracket and clamp together so that they cannot rotate relative to one another, and compresses the clamp throughbore, which thus crushes the ball collet, thus preventing the ball collet from rotating within the sleeve and tightening an attachment of the aperture of the ball collet over the one bone pin, and wherein the at least one recess or detent is disposed along the fracture fusion tube between at least two of the multiple bracket/clamp assemblies, and wherein the at least one recess or detent prevents the bracket/clamp assemblies from sliding past the at least one recess or detent along the fracture fusion tube.