Correlation of preoperatively planned humeral component size and actual implanted size: a retrospective and prospective evaluation of anatomic and reverse shoulder arthroplasty

For the utilized planning software and implants, humeral planning for rTSA affords some predictability for stem diameter regardless of whether assessed retrospectively or prospectively, with 84%-90% of cases within two diameters of the plan. The inlay humeral cup diameter was an exact match to the plan in 84%-90% of cases. For stemless anatomic TSA, the humeral component diameter was an exact match to the plan in 52%-57%, but within one size in 85%-86% of cases. There were no significant differences if the planning was performed retrospectively or prospectively.