Glenoid alignment guide

A glenoid alignment guide for aligning a drill bit relative to the glenoid and the glenoid neck of a patient, the glenoid alignment guide comprising:

• a retractor plate for displacing the posterior and superior aspect of the deltoid muscle, the retractor plate having a handle, a main body and a curved finger narrower than the main body of the retractor plate defining the forward end of the retractor plate, the finger being adapted for insertion behind the glenoid, the finger having a tip arranged to engage the bone of the glenoid neck to form a fulcrum for levering the muscle and other tissue clear of the glenoid, the main body of the retractor plate having opposite sides including a first side for engagement with the deltoid muscle, and a second side opposite the first side;
• and
• a drill guide slidably carried on the retractor plate only along the second side of the main body of the retractor plate and defining an axial path along which a drill bit is guided, the drill guide being movable along the second side of the main body of retractor plate to a forward position for engagement with the glenoid face, the arrangement being such that the drill guide can be advanced along the second side of the main body while the first side of the main body is engaging the deltoid muscle, and having guide means for guiding a drill bit along the axial path to make a hole from the glenoid face into the glenoid neck along the axis of the glenoid neck to receive fastening or locating means of a glenoid component of a shoulder implant, the tip of the finger of the retractor plate when engaged against the bone of the glenoid neck aligning the axial path defined by the drill guide relative to the glenoid neck.