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- Title
Distal tuberosity osteotomy in open-wedge high tibial osteotomy does not exacerbate patellofemoral osteoarthritis on arthroscopic evaluation.
- Authors
Horikawa, Tomohiro; Kubota, Kenji; Hara, Shintaro; Akasaki, Yukio
- Abstract
<bold>Purpose: </bold>The purpose of the present study was to use arthroscopy to evaluate the effect of distal tuberosity osteotomy (DTO) in open-wedge high tibial osteotomy (OW-HTO) on patellofemoral (PF) cartilage degradation.<bold>Methods: </bold>Between 2012 and 2017, 46 knees underwent DTO in OW-HTO, and 65 knees underwent conventional OW-HTO (cOW-HTO). To assess changes in patellar height, the Blackburne-Peel (BP) ratio and the Caton-Deschamps (CD) index were measured. Arthroscopic evaluation on the PF joint was performed at the initial osteotomy and at the second-look procedure 1 year later. Statistical analyses were performed to compare difference between the DTO and the cOW-HTO group.<bold>Results: </bold>In the cOW-HTO group, the mean BP ratio and CD index decreased significantly from 0.81 and 0.89 preoperatively, respectively, to 0.69 and 0.76 postoperatively, respectively (p < 0.001). In contrast, the DTO group maintained a consistent patellar height; the mean BP ratio and CD index were 0.77 and 0.83 preoperatively, respectively, and 0.73 and 0.80 postoperatively, respectively. Upon arthroscopic evaluation, 39 of 46 patients (84.8%) in the DTO group showed no progression of PF cartilage degradation at the second look; indeed, five of 46 patients (10.9%) even demonstrated improvement. In contrast, 21 of 65 patients (32.3%) in the cOW-HTO group exhibited increased PF cartilage degradation. There was a significant difference in progression of PF cartilage degradation between DTO and cOW-HTO (p < 0.001).<bold>Conclusion: </bold>DTO in OW-HTO maintained the preoperative patellar height, which could help prevent progression of cartilage degeneration in the PF joint after surgery. In respect of the biplanar osteotomy direction in OW-HTO, the DTO, rather than cOWHTO, is the preferred technique for the treatment of varus knee osteoarthritis to avoid progression of PF cartilage degradation.<bold>Level Of Evidence: </bold>III.
- Subjects
OSTEOTOMY; OSTEOARTHRITIS; OPERATIVE surgery; PATELLOFEMORAL joint; ARTHROSCOPY; KNEE surgery; TIBIA surgery; CARTILAGE; KNEE diseases; DISEASE progression; PATELLA; PREOPERATIVE period; CARTILAGE diseases; REOPERATION; POSTOPERATIVE period
- Publication
Knee Surgery, Sports Traumatology, Arthroscopy, 2020, Vol 28, Issue 6, p1750
- ISSN
0942-2056
- Publication type
journal article
- DOI
10.1007/s00167-019-05596-y