Inferior tilt of the glenoid component does not decrease scapular notching in reverse shoulder arthroplasty: results...

Area of Science:

• Orthopedic surgery
• Biomedical engineering
• Radiology

Background:

• Scapular notching is a common radiographic finding after reverse shoulder arthroplasty.
• The etiology and prevention of scapular notching remain areas of active investigation.
• Inferior tilt of the glenoid component has been proposed as a method to mitigate notching.

Purpose of the Study:

• To evaluate the efficacy of inferior glenoid component tilt in reducing radiographic scapular notching.
• To assess the impact of inferior glenoid component tilt on clinical outcomes following reverse shoulder arthroplasty.

Main Methods:

• A prospective randomized trial involving 52 patients undergoing reverse shoulder arthroplasty for cuff tear arthropathy.
• Patients were randomized to receive a glenoid component with no inferior tilt (control) or 10° inferior tilt.
• Radiographic notching and clinical outcomes were assessed at a minimum of 1-year follow-up.

Main Results:

• Radiographic follow-up was available for 42 patients (20 inferior tilt, 22 control).
• No significant difference in notch ratings or clinical outcomes was observed between the groups.
• Scapular notching occurred in 75% of the inferior tilt group and 86% of the control group.

Conclusions:

• Inferior tilt of the glenoid component does not decrease the incidence or severity of scapular notching after reverse shoulder arthroplasty.
• Glenoid component tilt did not yield any significant differences in clinical outcomes between the studied groups.