Glenoid baseplate and implant assemblies

A glenoid baseplate, comprising:

• a transverse plate having a medial side configured to engage scapula bone of a patient, a lateral side configured to face away from the medial side, a plurality of bone screw holes formed between the medial side and the lateral side, and a circular periphery extending between the medial side and the lateral side, the circular periphery having an anterior portion configured to be oriented toward an anterior side of a scapula, a posterior portion configured to be oriented toward a posterior side of the scapula, and a center;
• an anchor peg disposed along a longitudinal axis between a lateral end that is coupled with the medial side of the transverse plate and a medial end that is disposed away from the lateral end;
• a fastener body having a first end and a second end, wherein the fastener body is configured as a transverse extension of the anchor peg, the second end of the fastener body being coupled with the medial side of the transverse plate and the fastener body extends away from the first side of the transverse plate along the anchor peg and toward the lateral end of the anchor peg;
• and
• a threaded hole provided within the transverse plate and extending into the fastener body for facilitating a connection of an articular body to the glenoid baseplate;
• wherein the longitudinal axis of the anchor peg is offset from the center of the circular periphery toward the anterior portion thereof.

A method, comprising:

• providing a glenoid anchor having a transverse member having a medial side, a lateral side, an anterior periphery, a posterior periphery, an anchor peg extending from the medial side and disposed along a longitudinal axis between a lateral end and a medial end, the lateral end of the anchor peg being coupled with the medial side of the transverse member and the medial end of the anchor peg being disposed away from the lateral side of the transverse member, the anchor peg being located closer to the anterior periphery than to the posterior periphery, and a fastener body having a first end and a second end, wherein the fastener body is configured as a transverse extension of the anchor peg, the second end of the fastener body being coupled with the medial side of the transverse member and the fastener body extends away from the medial side of the transverse member and toward the medial end of the anchor peg;
• and a threaded hole provided within the transverse member and extending into the fastener body, wherein the threaded hole is a blind hole with an open end that opens up on the lateral side of the transverse member;
• forming a blind hole in a lateral portion of the scapula along a trajectory that is off set from a center of an inferior portion of a glenoid, the blind hole having an opening at the glenoid and an enclosed end opposite the opening, the enclosed end being spaced apart from an anterior surface of the scapula, and the enclosed end being spaced apart from a posterior surface of the scapula;
• and
• advancing the anchor peg of the glenoid anchor into the blind hole such that the anchor peg is enclosed within the scapula along the blind hole between the opening and the enclosed end.

A method, comprising:

• receiving image data responsive to a scan of a scapula of a patient;
• identifying from the image data an anchor trajectory extending medially from a lateral surface of the scapula, the anchor trajectory being at a selected position relative to an anterior surface of the scapula and a posterior surface of the scapula;
• forming a glenoid anchor having a transverse member having a medial side, a lateral side, an anterior periphery, a posterior periphery, a projection extending from the medial side and disposed along a longitudinal axis between a first end and a second end, the second end being coupled with the medial side of the transverse member and the first end being disposed away from the second end, the projection being located closer to the anterior periphery than to the posterior periphery, and a fastener body having a first end and a second end, wherein the fastener body is configured as a transverse extension of the projection, the second end of the fastener body being coupled with the medial side of the transverse member and the fastener body extends away from the medial side of the transverse member along the projection and toward the first end of the projection;
• and a threaded hole provided within the transverse member and extending into the fastener body, wherein the threaded hole is a blind hole with an open end that opens up on the lateral side of the transverse member;
• wherein the projection is disposed within the periphery at a location aligned with the identified anchor trajectory when the periphery is aligned with the curvature of the inferior portion of the glenoid rim.