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J Knee Surg 2013; 26(02): 105-108
DOI: 10.1055/s-0032-1319787
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Short-Term Outcomes of Unresurfaced Patellas in Total Knee Arthroplasty

Monti Khatod
1   Department of Orthopaedic Surgery, Kaiser Permanente, Los Angeles, California
,
Maria C. S. Inacio
2   Department of Surgical Outcomes and Analysis, Kaiser Permanente, San Diego, California
,
Stefano Bini
3   Department of Orthopaedic Surgery, Kaiser Permanente, Oakland, California
› Author Affiliations
Further Information

Publication History

08 March 2012

13 March 2012

Publication Date:
13 July 2012 (online)

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Abstract

Selective patellar resurfacing continues in total knee arthroplasty (TKA). We define the demographics of patients selected for this procedure and report their short-term, aseptic revision rate. A community-based Total Joint Replacement Registry (TJRR) comprising 39,000 TKAs with median follow-up of 24.5 months was evaluated. Patients who underwent bicompartmental TKA were younger (p < 0.001), suffered posttraumatic arthrosis (p < 0.001), and receive hybrid fixation (p < 0.001). In multivariate analysis, the unresurfaced patella is an independent risk factor for early revision with a relative increased risk of 2.3 (95% CI, 1.4–3.7). The cumulative survivorship at 6 years for tricompartmental TKA is 98.1 versus 93.6% for bicompartmental knees (p < 0.001). Despite selecting patients with presumably healthier patellofemoral joints for bicompartmental TKA, the unresurfaced patella remains a risk factor for early revision.

Keywords

knee - patella - arthroplasty - outcomes - revision
 

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