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In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty
Published on: May 5, 2023
Initial experience with the oxford unicompartmental knee arthroplasty
Geoffrey F Dervin1, Chris Carruthers, Robert J Feibel
1Division of Orthopedic Surgery, University of Ottawa, TOH-General Campus, Ottawa, Canada.
The Journal of Arthroplasty
|July 30, 2010
Summary
This study reviews early failures of mobile bearing medial compartment unicompartmental knee arthroplasty (UKA), identifying key technical issues like overstuffing and poor cementation to improve patient outcomes.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Unicompartmental knee arthroplasty (UKA) is a surgical option for medial compartment osteoarthritis.
- Mobile bearing designs, such as the Oxford UKA, aim to improve kinematics and patient function.
Purpose of the Study:
- To present initial experiences with mobile bearing medial compartment UKA.
- To identify lessons learned to avoid short-term failures and guide future practice.
Main Methods:
- Review of consecutive Oxford medial UKA cases performed between February 2001 and April 2006.
- Analysis of cases revised to total knee arthroplasty (TKA) to identify reasons for failure.
Main Results:
- 32 out of 545 patients (mean age 65.0, BMI 30.1) required revision to TKA.
- Common revision reasons included lateral compartment arthritis, aseptic loosening, persistent pain, and meniscal bearing dislocation.
- Revisions utilized primary unconstrained TKA implants without stems or wedges.
Conclusions:
- Early revision rates for mobile bearing medial UKA can be higher, reflecting registry data.
- Technical factors such as overstuffing, inadequate cementation, and patient selection are critical for success.
- Adherence to strict patient selection criteria and meticulous surgical technique is essential for optimal UKA outcomes.