Pegged versus keeled glenoid components in total shoulder arthroplasty

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Radiology

Background:

• Glenoid component loosening is a frequent complication following shoulder arthroplasty.
• Understanding the comparative performance of different glenoid implant designs is crucial for improving patient outcomes.

Purpose of the Study:

• To radiographically and clinically compare the outcomes of keeled versus pegged glenoid components in shoulder arthroplasty.
• To test the hypothesis that keeled and pegged glenoid components exhibit equivalent performance.

Main Methods:

• A cohort of 100 patients undergoing primary shoulder arthroplasty for osteoarthritis was analyzed.
• Fifty patients received keeled glenoid components, and fifty received pegged components.
• Standardized radiographs were used to assess preoperative degenerative changes and postoperative radiolucency and component position.

Main Results:

• Both keeled and pegged glenoid components demonstrated significant postoperative improvements in shoulder motion and pain.
• No statistically significant differences were observed in clinical outcomes between the keeled and pegged groups.
• At intermediate-term follow-up, the rate of glenoid implants at risk for loosening was comparable between the pegged (12%) and keeled (8%) groups (P = .74).

Conclusions:

• Initial postoperative radiographs show a low incidence of radiolucent lines around both pegged and keeled glenoid components.
• While radiolucencies may develop over time, there is no significant difference in clinical or radiographic outcomes between pegged and keeled components at intermediate follow-up.