Journal article
Presence of a Lateral Trochlear Osteophyte Predicts Medial Unicompartmental Arthroplasty Failure at Midterm Follow-up
Arthroplasty today, Vol.19, p.101044
11/29/2022
DOI: 10.1016/j.artd.2022.09.013
PMCID: PMC9713262
PMID: 36465693
Abstract
Background: Specific clinical and radiographic risk factors for medial unicompartmental knee arthroplasty (UKA) failure are incompletely understood. The purpose of this study was to perform a midterm survivorship analysis of medial UKA from a single, nondesigner surgeon. Based on observations from clinical practice, we hypothesized that the presence of a lateral trochlear osteophyte on preoperative Merchant radiographs may be predictive of medial UKA failure secondary to progressive osteoarthritis (OA). Methods: Patients who underwent a mobile-bearing medial UKA by a single surgeon with minimum 24 months of clinical follow-up from 2008 to 2019 were retrospectively identified. Radiographic parameters, including the presence of a lateral trochlear osteophyte, were measured. Kaplan-Meier survivorship analyses were performed. Cox proportional hazards models were used to evaluate variables as risk factors for UKA failure, defined as reoperation or component revision. Results: A total of 233 UKAs were included. The mean age was 60 years, mean BMI 32 kg/m2, and 53% of patients were male. The mean follow-up duration was 5.7 years (range, 2.0-13.1 years). Using any reoperation as an endpoint, the 10-year survival was 91%. Using any component revision as an endpoint, the 10-year survival was 93%. Using revision due to progressive OA as an endpoint, the 10-year survival was 95%. The presence of a lateral trochlear osteophyte was associated with an increased risk of any reoperation (hazard ratio 3.6; 95% confidence interval 1.3-9.5) and increased risk of revision due to progressive OA (hazard ratio 9.8; 95% confidence interval 2.9-32.7). Conclusions: The presence of a lateral trochlear osteophyte on preoperative Merchant view radiographs was associated with an increased risk of medial UKA failure.
Details
- Title: Subtitle
- Presence of a Lateral Trochlear Osteophyte Predicts Medial Unicompartmental Arthroplasty Failure at Midterm Follow-up
- Creators
- Christopher N. Carender - University of IowaDayton R. Rand - University of IowaDavid E. DeMik - University of IowaQiang An - University of IowaNicolas O. Noiseux - Department of Orthopedics and Rehabilitation, University of Iowa, Iowa City, IA, USA
- Resource Type
- Journal article
- Publication Details
- Arthroplasty today, Vol.19, p.101044
- Publisher
- Elsevier
- DOI
- 10.1016/j.artd.2022.09.013
- PMID
- 36465693
- PMCID
- PMC9713262
- ISSN
- 2352-3441
- eISSN
- 2352-3441
- Language
- English
- Date published
- 11/29/2022
- Academic Unit
- Orthopedics and Rehabilitation
- Record Identifier
- 9984322740502771
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