Total reverse shoulder systems and methods

Abstract

A reverse shoulder system can include, for example, a glenoid baseplate comprising a longitudinal axis, the glenoid baseplate further including a stem and a central channel within a sidewall of the stem. The stem can include a longitudinal axis. The longitudinal axis of the glenoid baseplate can be angled with respect to the longitudinal axis of the stem, wherein the longitudinal axis of the glenoid baseplate is not perpendicular with respect to the longitudinal axis of the stem. Other components including a glenosphere, tools, and methods of use are also disclosed.

What is claimed is: 
     
         1 . A reverse shoulder system, comprising:
 a glenoid baseplate comprising a longitudinal axis,   the glenoid baseplate further comprising a stem and a central channel within a sidewall of the stem, the stem comprising a longitudinal axis,   wherein the longitudinal axis of the glenoid baseplate is angled with respect to the longitudinal axis of the stem, wherein the longitudinal axis of the glenoid baseplate is not perpendicular with respect to the longitudinal axis of the stem.   
     
     
         2 . The system of  claim 1 , wherein the glenoid baseplate comprises a generally disc-shaped portion extending radially outward from the central channel. 
     
     
         3 . The system of  claim 2 , wherein the stem comprises a sidewall that extends superiorly with respect to the disc portion. 
     
     
         4 . The system of  claim 1 , wherein the glenoid baseplate comprises a peripheral edge. 
     
     
         5 . The system of  claim 4 , wherein the peripheral edge comprises spaced-apart anti-rotation features. 
     
     
         6 . The system of  claim 5 , wherein the anti-rotation features comprise slots. 
     
     
         7 . The system of  claim 4 , wherein an inferior portion of the peripheral edge comprises a porous coating. 
     
     
         8 . The system of  claim 1 , wherein an inferior surface of the generally disc-shaped portion comprises a porous coating, but a superior surface does not comprise a porous coating. 
     
     
         9 . The system of  claim 4 , wherein the peripheral edge and/or an inferior surface of the baseplate comprises a conical geometry. 
     
     
         10 . The system of  claim 1 , wherein an inferior surface of the baseplate is concave. 
     
     
         11 . The system of  claim 1 , wherein the stem comprises a Morse taper lock superior to a superior-most portion of the generally disc-shaped portion of the glenoid baseplate. 
     
     
         12 . The system of  claim 1 , further comprising a glenosphere. 
     
     
         13 . The system of  claim 12 , wherein the glenosphere comprises a superior dome-shaped surface comprising a rotational control feature configured such that an inserter tool can lock the glenosphere and the baseplate to allow for rotation of the glenosphere and the baseplate together. 
     
     
         14 . The system of  claim 13 , wherein the rotational control feature comprises a spline. 
     
     
         15 . The system of  claim 12 , further comprising a central set screw and locking nut. 
     
     
         16 . The system of  claim 15 , further comprising a central compression screw non-integral with the baseplate and configured for placement adjacent and distal to the central set screw.