Drill guides and extension therefor for simultaneous use on a bone plate

摘要

Removable drill guide tips are provided for simultaneous assembly relative to the holes of a bone plate. The drill guide tips are used as a guide for a drill bit without any additional extension and then removed with a tool to allow insertion of a screw within the same hole in the bone plate. Alternatively, the drill guide tips may be used with an extension to extend the effective length of the drill guide.

主权项

1. A bone plate system for use with fasteners for fixation of a fractured bone, said system comprising:
a) a bone plate for placement on the bone, said bone plate defining a plurality of threaded first holes for receiving a plurality of the fasteners in engagement with said threaded first holes, said threaded first holes defining respective holes axes extending centrally through said first holes, and a plurality a second holes for receiving a plurality of the fasteners therethrough, said plate including a bone contacting first surface, an opposite second surface, and a thickness extending in a dimension between said first and second surfaces; b) a plurality of tubular drill guide tips simultaneously threadedly engaged within respective ones of said plurality of threaded first holes of said bone plate in axial alignment with said fixed hole axes, each drill guide tip is discretely coupled to said plate with complete decoupling from the other drill guide tips other than through said plate, each drill guide tip having an internal surface defining a bore, a proximal guiding end, an externally threaded distal end for engagement with said threaded first holes; and a longitudinal axis extending through a radial center of said bore, each said drill guide tip having a body portion extending between said guiding end and said second surface of said plate, said body portion having a length that displaces said guiding end relative to said second surface of said bone plate, and which is sufficiently short in length so that said body portion does not interfere with a body portion of an adjacent simultaneously threadedly engaged drill guide tip; and c) a guide extension having a proximal end and a distal end, said distal end stepped in diameter in order to fit in said proximal guiding end of each said drill guide tip and said distal end non-threadedly coupled to one of said drill guide tips, and said proximal end displaced farther from said second surface of said plate than said guiding end of each said drill guide tips, wherein a straight continuous constant parameter path is provided through said extension and said drill guide tip, such that said path is longer than said bore of said drill guide tip.