A Multi-Centre, Randomized Controlled Trial Comparing A Second-Generation Uncemented Trabecular Metal-Backed vs. Cemented Polyethylene Glenoid Component in Total Shoulder Arthroplasty: Two-Year Results

Description

In this presentation, Brendan Lim, a medical student at UBC, discusses a randomized clinical trial he coordinated that compares the use of uncemented trabecular metal glenoid components with cemented polyethylene glenoid components in total shoulder arthroplasty. The study aimed to determine various patient-reported, clinical, and radiographic outcomes five years post-surgery. Lim highlights that shoulder osteoarthritis is a significant global issue, and total shoulder arthroplasty is effective for relieving symptoms and improving patient function. He emphasizes the importance of glenoid fixation, noting that aseptic glenoid loosening is a common cause of failure in shoulder replacements. The trial involved multiple surgeons and took place across three sites, with patient randomization occurring in the operating room. Key assessment parameters included validated outcome measures, clinical strength and motion evaluations, and radiographic assessments for metal debris. Findings revealed clinically significant improvements in both groups, with no substantial differences in outcomes between the two glenoid types at two years. However, a statistically significant result favored the trabecular metal group at six months. The presentation concludes with insights into the low incidence of complications and revisions, stating that mild metal debris was present in some patients without negatively impacting outcomes. Lim acknowledges the strengths and limitations of the study and expresses gratitude to Zimmer Biomet for their funding.

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