Variation in Preoperative Planning of Reverse Baseplate Selection: A Comparison of 49 Cases Planned by 9 Surgeons

The prevalence of reverse total shoulder arthroplasty (RTSA) has surpassed anatomic shoulder arthroplasty and is often used in complex cases of severe glenoid erosion including cases with an intact rotator cuff where there may be concerns about addressing glenoid wear with anatomic implants. CT-based preoperative planning software is now available for most commonly-used implants allowing surgeons to virtually determine optimal implant choice and placement in advance of surgery. While there are generally agreed upon ranges of normal glenoid anatomy for version and inclination, standards for an optimal RTSA have yet to be established. This study seeks to quantify surgeon differences in baseplate selection and placement for a series of cases with a range of pathologic glenoids.