Does Bearing Design Influence Midterm Survivorship of Unicompartmental Arthroplasty?

Whittaker, John-Paul; Naudie, Douglas D.R.; McAuley, James P.; McCalden, Richard W.; MacDonald, Steven J.; Bourne, Robert B.

doi:10.1007/s11999-009-0975-7

Cited by 64 publications

(80 citation statements)

References 51 publications

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“…Higher early minor reintervention rates for the mobile-bearing UKA were reported [7,8,11,41]. Comparative studies did not find any differences in terms of survivorship; however, the followup was limited [7,8,11,25,41]. Our goal was therefore to compare the long-term function and survivorship of fixedand mobile-bearing UKA.…”

Section: Discussionmentioning

confidence: 97%

“…First, our study was retrospective with the attendant risk of selection bias. Second, we were unable to compare the functional improvement as measured using contemporary evaluation tools such as a specific quality-of life questionnaire (such as the WOMAC score or the Knee Osteoarthritis Outcomes Score) [29,41]. These scores were not available in our institution at the time of the preoperative screening of the patients [29,41].…”

Section: Discussionmentioning

confidence: 99%

“…Second, we were unable to compare the functional improvement as measured using contemporary evaluation tools such as a specific quality-of life questionnaire (such as the WOMAC score or the Knee Osteoarthritis Outcomes Score) [29,41]. These scores were not available in our institution at the time of the preoperative screening of the patients [29,41]. Third, the radiographs were not subjected to review by multiple blinded observers, which can lead to an analysis bias related to potential inter-and intraobserver error [32].…”

Section: Discussionmentioning

confidence: 99%

“…One early retrieval studies supported this notion by showing low wear rates with this fully conforming mobile-bearing UKA [4]. Precise alignment and ligament balancing are, however, essential to prevent mobile-bearing dislocation or impingement and to avoid overcorrection, which may lead to rapid progression of arthritis in the opposite compartment [7,15,41].…”

Section: Introductionmentioning

confidence: 93%

“…Earlier studies comparing the reintervention rate [8] and the short-and midterm survivorship [9,11,41] after fixed-or mobilebearing UKA suggested a higher early minor reintervention rate for the mobile-bearing UKA [8]. However, whether the long-term function and survivorship are similar is unclear.…”

Section: Introductionmentioning

confidence: 99%

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Background Early studies in the literature reported relatively high early minor reintervention rate for the mobilebearing unilateral knee arthroplasty (UKA) compared with short-and midterm survivorship after fixed-or mobilebearing UKA. However, whether the long-term function and survivorship are similar is unclear. Questions/purposes We therefore asked whether (1) mobile-or fixed-bearing UKAs have comparable function (as measured by the Knee Society scores); (2) mobile-and fixed-bearing UKA have comparable Knee Society radiographic scores; and (3) the long-term survivorship is comparable. Methods We retrospectively reviewed 75 patients (79 knees) with a fixed-bearing UKA and 72 patients (77 knees) with a mobile-bearing UKA operated on between 1989 and 1992. Mean age of the patients was 63 years; gender and body mass index (26 kg/m 2 ) were comparable in the two groups. We obtained Knee Society function and radiographic scores and determined survival. The minimum followup was 15 years (mean, 17.2 ± 4.8 years; range, 15-21.2 years).

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