Reverse Total Shoulder Arthroplasty Using Lateralized Glenoid Baseplates Has Superior Patient-determined Outcome...

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering

Background:

• Optimal glenoid baseplate selection remains debated in reverse total shoulder arthroplasty (RTSA).
• Lateralized baseplates are hypothesized to enhance outcomes and range of motion without increased complications.

Purpose of the Study:

• To compare patient-determined outcomes, range of motion, and complication rates between lateralized and standard baseplates in RTSA.

Main Methods:

• Patients undergoing RTSA were divided into standard baseplate (SBG) and lateralized baseplate (LBG) groups.
• Patient-reported outcome scores (WOMAC, ASES, SANE, SST) and range of motion were recorded at baseline, 1, and 2 years.
• Complication rates, including scapular notching, were documented.

Main Results:

• At 2 years, the LBG demonstrated significantly better WOMAC, ASES, SST, and SANE scores compared to the SBG.
• Improvement in SST and SANE scores from baseline was greater in the LBG.
• No significant difference in range of motion was observed between groups.
• Overall complication rates were similar, but scapular notching was less prevalent in the LBG.

Conclusions:

• Lateralized baseplates in RTSA lead to superior patient-determined outcomes at 2-year follow-up compared to standard baseplates.
• Lateralized baseplates are associated with a lower incidence of scapular notching.
• Range of motion is not significantly improved with lateralized baseplates.