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Fixed versus mobile bearing unicompartmental knee replacement: a meta-analysis
T O Smith1, C B Hing, L Davies
1Institute of Orthopaedics, Norfolk & Norwich University Hospital, Colney Lane, Norwich, Norfolk Island, NR2 7UY, UK. toby.smith@nnuh.nhs.uk
Orthopaedics & Traumatology, Surgery & Research : OTSR
|November 28, 2009
Summary
This review found no significant difference in clinical outcomes or complications between fixed and mobile bearing unicompartmental knee replacements (UKRs). Further research is needed due to methodological limitations in the reviewed studies.
Area of Science:
- Orthopedic surgery
- Biomedical engineering
- Clinical outcomes research
Background:
- Unicompartmental knee replacement (UKR) is an alternative to total knee replacement for specific knee arthritis.
- Both fixed and mobile bearing designs are available, with differing biomechanical properties.
- Clinical evidence comparing these designs is evolving.
Purpose of the Study:
- To systematically review and compare clinical, radiological, and kinematic outcomes of fixed versus mobile bearing UKRs.
- To perform a meta-analysis to quantify differences in outcomes and complication rates.
Main Methods:
- Systematic review of electronic databases.
- Meta-analysis of pooled mean difference and relative risk data.
- Inclusion of five relevant studies.
Main Results:
- No statistically significant difference was found in clinical outcomes between mobile and fixed bearing UKRs.
- No significant difference in complication rates was observed between the two bearing types.
- The reviewed evidence exhibited methodological limitations.
Conclusions:
- Current evidence suggests comparable clinical performance and complication rates for fixed and mobile bearing UKRs.
- Methodological limitations necessitate caution in interpreting results.
- Further high-quality research is recommended to definitively compare these UKR designs.