Elimination of Preoperative Flexion Contracture as a Contraindication for Unicompartmental Knee Arthroplasty

The Journal of the American Academy of Orthopaedic Surgeons
Richard L PurcellGerard A Engh

Abstract

Unicompartmental knee arthroplasty (UKA) is an effective alternative to total knee arthroplasty (TKA) for the management of unicondylar osteoarthritis. Historical contraindications limit patients' eligibility for UKA. However, recent reports have suggested that some contraindications may not be absolute. This study evaluates preoperative flexion contracture with regard to UKA. This study was a retrospective review of 53 patients with preoperative flexion contracture between 11° and 20° who underwent fixed-bearing UKA and a matched cohort of 53 patients who underwent cruciate-retaining TKA. Preoperatively, the average flexion contracture was 13.8° in the UKA group and 14.1° in the TKA group (P = 0.42). Mean preoperative motion was greater in the patients treated with UKA (106°) than in those treated with TKA (97°; P < 0.001). Postoperatively, patients who underwent UKA had greater motion than patients who underwent TKA had (121° versus 113°; P < 0.01). Residual flexion contracture was greater in the UKA group (4.1°) than in the TKA group (2.1°; P = 0.02). The two groups demonstrated similar improvements in Knee Society clinical scores (P = 0.32). However, patients treated with UKA demonstrated higher Knee Society functional scor...Continue Reading

References

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Jul 5, 2011·The Journal of Arthroplasty·Chi-Hsiang HsuJun-Wen Wang
Jan 11, 2016·The Journal of Arthroplasty·Jerry Yongqiang ChenSeng Jin Yeo

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Citations

Dec 12, 2018·European Journal of Orthopaedic Surgery & Traumatology : Orthopédie Traumatologie·Filippo MiglioriniJörg Eschweiler
Jul 17, 2021·Archives of Orthopaedic and Trauma Surgery·Johannes BeckmannEmmanuel Thienpont

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