Ulna Osteotomy System

Abstract

A bone plate includes a first three-part combination hole extending through a proximal portion of the plate, a first portion configured to engage a threaded head portion of a bone fixation element, a second portion configured to receive a bone fixation element along an axis substantially perpendicular to a longitudinal axis of the bone and a third portion defining a screw axis extending toward the distal end of the elongated body at a non-perpendicular angle relative to the longitudinal axis in combination with a first two-part combination hole extending through the proximal portion, a first threaded portion configured to engage a threaded head portion of a bone fixation element and a second portion defining an elongated slot extending along a longitudinal axis of the plate for receiving a bone fixation element so that the plate may slide along its longitudinal axis relative to the bone fixation element.

1 - 23 . (canceled) 
     
     
         24 . A bone plate, comprising:
 a body extending along a longitudinal axis from a proximal end to a distal end and including a first surface which, when the bone plate is in an operative position along a bone, faces away from the bone, and a second surface which, when the bone plate is in the operative position, faces toward the bone; and   a three part combination hole extending through the body from a first surface to the second surface, a first portion of the three part combination hole defining a first portion axis and being configured to lockingly engage a head of a first bone fixation element to lock the first bone fixation element along the first portion axis, a second portion of the three part combination hole being shaped to engage a head of a second bone fixation element to permit insertion of the second bone fixation element only along a second portion axis substantially perpendicular to the longitudinal axis, a third portion of the three part combination hole smoothly transitioning from the second portion with a shape of the third portion gradually changing along a length of the third portion to angulate an axis along which a second bone fixation element will extend when inserted therethrough so that an angulation of a second bone fixation element inserted into the third portion varies along the length of the third portion to a maximum angulation relative to the second portion axis at a second end of the third portion furthest from the second portion.   
     
     
         25 . The bone plate of  claim 24 , wherein the first portion includes a threading for engaging a threaded head of the first bone fixation element. 
     
     
         26 . The bone plate of  claim 24 , wherein the second portion includes a curved wall tapering from the first surface to the second surface. 
     
     
         27 . The bone plate of  claim 26 , wherein the third portion includes a first wall extending from the curved wall to form a continuous surface therewith so that a head of the second bone fixation element may be seated therealong when the bone fixation element is at the user-selected angle. 
     
     
         28 . The bone plate of  claim 27 , wherein the third portion includes a second wall extending from an end of the first wall toward the second surface to accommodate a shaft portion of the second bone fixation element at the maximum angulation. 
     
     
         29 . The bone plate of  claim 24 , wherein the maximum angulation is 45 degrees. 
     
     
         30 . The bone plate of  claim 26 , wherein the curved wall is shaped so that, when the second bone fixation element is inserted therein along the second portion axis, the head of the second bone fixation element does not extend proximally of the first surface. 
     
     
         31 . A system for treating a bone, comprising:
 a bone plate including a three part combination hole extending therethrough from a first surface which, in an operative position, faces away from a bone, to a second surface which, in the operative position, faces toward the bone, the three part combination hole including a first portion defining a first portion axis and including a threading thereabout, a second portion shaped to engage a head of a bone fixation element to permit insertion of the bone fixation element only along a second portion axis substantially perpendicular to the longitudinal axis, and a third portion smoothly transitioning from the second portion with a shape of the third portion gradually changing along a length of the third portion to angulate an axis along which the bone fixation element will extend when inserted therethrough so that an angulation of a bone fixation element inserted into the third portion varies along the length of the third portion to a maximum angulation relative to the second portion axis at a second end of the third portion furthest from the second portion; and   a first bone fixation element insertable into one of the second portion and the third portion.   
     
     
         32 . The system of  claim 31 , wherein the first bone fixation element is a cortex screw. 
     
     
         33 . The system of  claim 31 , further comprising a second bone fixation element insertable through the first portion of the three part combination hole along the first portion axis. 
     
     
         34 . The system of  claim 33 , wherein the second bone fixation element is a locking screw. 
     
     
         35 . The system of  claim 31 , wherein the second portion includes a curved wall tapering from the first surface to the second surface. 
     
     
         36 . The system of  claim 35 , wherein the third portion includes a first wall extending from the curved wall to form a continuous surface therewith so that a head of the first bone fixation element may be seated therealong when the bone fixation element is at the user-selected angle. 
     
     
         37 . The system of  claim 36 , wherein the third portion includes a second wall extending from an end of the first wall toward the second surface to accommodate a shaft of the first bone fixation element at the maximum angulation. 
     
     
         38 . The system of  claim 31 , wherein the maximum angulation is 45 degrees. 
     
     
         39 . The system of  claim 35 , wherein, when the head of the first bone fixation element is seated in the curved wall, the head of the first bone fixation element does not extend proximally of the first surface.