Please login to view this media
- Talk
- 18/05/2021
- UK
Survivorship of Fixed vs Mobile Bearing Unicompartmental Knee Replacement: A Systematic Review and Meta-Analysis of Sixty-Four Studies and National Joint Registries
Description
In this presentation, Zaid Abu Al-Rub introduces a comprehensive study comparing the survivorship and revision rates of fixed versus mobile bearing unicompartmental knee replacements (UKRs). The speaker outlines the study's aim to provide a thorough review that encompasses both medial and lateral UKRs, overcoming limitations of previous systematic reviews that were restricted in their literature inclusion.
The methodology involved a rigorous search for studies published in English over the last 15 years, focusing on survival and revision rates with a minimum follow-up of five years. The analysis included a variety of study designs, aggregating data from both national registries and cohort studies. Ultimately, a total of 64 studies comprising 70 cohorts were analyzed, with a mean follow-up of 7.3 years.
Key findings revealed that the most common reason for revision was the progression of osteoarthritis across both types of bearing modalities. However, mobile bearing UKRs exhibited a significantly higher revision risk in the lateral compartment, with a four-fold increase compared to fixed bearing implants. In contrast, the medial cohort showed no statistically significant differences in revision rates between the bearing types. Additionally, the factors leading to revisions varied between medial and lateral compartments, highlighting surgical and device considerations.
The results indicate a need for cautious interpretation, given the inherent biases in observational data, with differences in sample sizes possibly affecting outcomes. The findings underscore important implications for the choice of knee replacements and contribute to the ongoing discourse on the performance of current implant designs. The presentation concludes with a call for further research to refine understanding and improve future surgical outcomes.