Captured Slotted Reamer

Abstract

Described herein are cannulated reamer designs and methods. In one embodiment, a reamer comprises a cannulated central body portion, a plurality of cutting legs and outer frame. The cannulated central body portion has an inner wall surface and an opposing outer wall surface defining a thickness and a bone contacting surface and an opposing distal end surface defining a length, the inner wall surface defining a bore about a central longitudinal axis of the cannulated central body portion. The plurality of cutting legs extends outwardly from the cannulated central body portion. The other defines a periphery of the reamer, the outer frame coupled to a lateral end of each of the plurality of cutting legs. The cannulated central body portion has a recess extending entirely through the thickness and only partially though the length.

1 . A method of reaming a glenoid of a scapula comprising:
 driving a guide pin into a glenoid;   receiving the guide pin within a central body of a reamer assembly, the central body being pivotably connected to a reamer of the reamer assembly such that the central body is pivotable from a first position to a second position relative to the reamer;   positioning a cutting surface of the reamer against the glenoid;   coupling a driver to the to the central body while the central body is in the first position and so that a driver axis of the driver is oriented at an oblique angle relative to a central axis of the reamer; and   driving the driver to ream the glenoid with the reamer.   
     
     
         2 . The method of  claim 1 , further comprising pivoting the central body of the reamer assembly to the second position relative to the reamer while the driver is coupled thereto such that, in the second position, the driver axis is substantially coaxial with the central axis of the reamer. 
     
     
         3 . The method of  claim 1 , wherein the central body of the reamer is a cannulated. 
     
     
         4 . The method of  claim 1 , wherein the central body is pivotably connected to the reamer via a hinged joint. 
     
     
         5 . The method of  claim 1 , further comprising:
 sliding a cannulated shaft of the driver over the guide pin until the cannulated shaft is coupled to the central body of the reamer assembly.   
     
     
         6 . The method of  claim 1 , further comprising engaging a latch of the reamer assembly to the central body to secure the central body relative to the reamer. 
     
     
         7 . The method of  claim 6 , wherein the engaging step is performed when the central body is in the second position. 
     
     
         8 . The method of  claim 1 , wherein the reamer of the reamer assembly includes a plurality of cutting legs extending between an outer frame and the central body of the reamer, the central axis being perpendicular to a plane defined by the outer frame. 
     
     
         9 . A method of reaming a concave surface of an articular joint comprising:
 inserting a guide pin into the concave surface of the articular joint;   receiving the guide pin within a central body of a reamer assembly, the central body being moveable between a first position and a second position relative to a reamer of the reamer assembly, the guide pin being received within the central body of the reamer assembly when the reamer assembly is in the first position and such that a pin axis is oriented at a first angle relative to a central axis of a reamer;   positioning a cutting surface of the reamer against the concave surface of the articular joint;   coupling a driver to the to the central body so that the guide pin is received within the driver; and   driving the driver to ream the articular joint with the reamer.   
     
     
         10 . The method of  claim 9 , further comprising pivoting the central body of the reamer assembly to the second position relative to the reamer while the driver is coupled thereto such that, in the second position, a driver axis is substantially coaxial with the central axis of the reamer. 
     
     
         11 . The method of  claim 9 , wherein the central body of the reamer is a cannulated. 
     
     
         12 . The method of  claim 9 , wherein the central body is moveably connected to the reamer via a hinged joint. 
     
     
         13 . The method of  claim 12 , wherein the hinged joint includes a hinge pin. 
     
     
         14 . The method of  claim 9 , further comprising engaging a latch of the reamer assembly to the central body to secure the central body relative to the reamer. 
     
     
         15 . The method of  claim 14 , wherein the engaging step is performed when the central body is in the second position. 
     
     
         16 . The method of  claim 9 , wherein the reamer of the reamer assembly includes a plurality of cutting legs extending between an outer frame and the central body of the reamer, the central longitudinal axis being perpendicular to a plane defined by the outer frame. 
     
     
         17 . The method of  claim 16 , wherein the central hub of the reamer includes a central positioning portion protruding outwardly therefrom for positioning within an opening in the concave surface of the bone. 
     
     
         18 . The method of  claim 16 , wherein the outer frame is circular and a space is defined between each of the plurality of cutting legs. 
     
     
         19 . The method of  claim 9 , wherein articular joint is a glenohumeral joint. 
     
     
         20 . The method of  claim 9 , wherein the coupling step includes magnetically connecting the driver to the central body.