Unicompartmental knee replacement after high tibial osteotomy: Invalidating a contraindication.
The outcome of high tibial osteotomy (HTO) deteriorates with time, and additional procedures may be required. The aim of this study was to compare the clinical and radiological outcomes between unicompartmental knee replacement (UKR) and total knee replacement (TKR) after HTO as well as after primary UKR. A total of 63 patients (63 knees) were studied retrospectively and divided into three groups: UKR after HTO (group A; n = 22), TKR after HTO (group B; n = 18) and primary UKR (group C; n = 22). The Oxford knee score (OKS), Knee Society score (KSS), hip-knee-ankle angles, mechanical axis and patellar height were evaluated pre- and post-operatively. At a mean of 64 months (19 to 180) post-operatively the mean OKS was 43.8 (33 to 49), 43.3 (30 to 48) and 42.5 (29 to 48) for groups A, B and C, respectively (p = 0.73). The mean KSS knee score was 88.8 (54 to 100), 88.11 (51 to 100) and 85.3 (45 to 100) for groups A, B and C, respectively (p = 0.65), and the mean KSS function score was 85.0 (50 to 100) in group A, 85.8 (20 to 100) in group B and 79.3 (50 to 100) in group C (p = 0.48). Radiologically the results were comparable for all groups except for patellar height, with a higher incidence of patella infra following a previous HTO (p = 0.02).
Wayne State University, 10000 Telegraph Road, Taylor, Michigan 48124, USA.
G A
GA
Valenzuela
N A
NA
Jacobson
D
D
Buzas
T D
TD
Koreckij
T D
TD
Korecki
R G
RG
Valenzuela
R A
RA
Teitge
D000328:Adult; D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D062785:Hemiarthroplasty / Q000009:adverse effects / Q000379:methods*; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D010027:Osteotomy / Q000009:adverse effects / Q000379:methods*; D011859:Radiography; D012189:Retrospective Studies; D012720:Severity of Illness Index; D013977:Tibia / Q000601:surgery*; D016896:Treatment Outcome
Arthroplasty; HTA; High tibial osteotomy; UKA; UKR; Unicompartmental knee arthroplasty; Unicompartmental knee replacement