BONE SETTING DEVICE

• US 3,604,414 A
• Filed: 08/29/1968
• Issued: 09/14/1971
• Est. Priority Date: 08/29/1968
• Status: Expired due to Term

• Current Assignee: Nicomedes Borges
• Original Assignee: Nicomedes Borges
• Inventors: Borges, Nicomedes
• Primary Examiner(s): Gaudet, Richard A.
• Assistant Examiner(s): Mitchell, J. B.
• Application Number:
  US04/756,206
• Time in Patent Office: 1,111 Days
• Field of Search: 128/83,92,92A,92D,92E,87,92R,92ED,87R
• US Class Current: 606/105
• CPC Class Codes: A61B 17/7225 for bone compression
• CPC Class Codes: A61B 17/8009 the plate having a ratchet
• CPC Class Codes: A61B 17/8019 where the means are a separate tool rather than being part of the plate
• CPC Class Codes: A61B 17/8023 Variable length plates adjustable in both directions

Abstract

An osteosynthesis plate of two-piece construction having a toothed rack system to enable sliding movement of the two pieces in a direction to move the plate pieces in a direction to achieve the greatest approximation of a fractured bone to facilitate joining the fracture in the bone. The plates are secured to the fragments of the bone by screw members and a tool for moving the plates toward each other is provided to facilitate engagement with the plates after they have been attached to the fragments of the fractured bone.

Claims

1. A device for setting bone fragments comprising an osteosynthesis plate constructed of first and second substantially flat elongated pieces, said first piece having upper and lower surfaces and first and second ends, the lower surface being adapted to engage the bone fragments, said second piece overlying the upper surface of said first piece and being adapted to remain remote from the bone fragments, means for guiding said pieces and enabling longitudinal movement of the pieces toward each other into approximation but preventing movement in the opposite direction after approximation has been achieved, said means including a longitudinal recess in said first piece extending over a major portion of the length thereof and defining flanges slidably receiving substantially the entire length of said second piece, said means further including a plurality of teeth in said longitudinal recess and a plurality of teeth on said second piece, said teeth on said first piece having two faces, one of said two faces being substantially perpendicular to the longitudinal axis of said first piece and the other of said faces being inclined toward said first end, said teeth on said second piece also having a pair of faces, one of said pair of faces being substantially perpendicular to the longitudinal axis of said second piece and the other of said pair of faces being inclined toward said second end, each of said pieces of said plate including at least one aperture therein, said recess including a longitudinal slot therein underlying said aperture in said second piece, a fastener extending through each of said apertures and adapted to engage the bone fragments, an opening in each of said pieces, and means for engaging the openings and moving the two pieces of the plate into approximation.