title: A mid term comparison of open wedge high tibial osteotomy vs unicompartmental knee arthroplasty for medial compartment osteoarthritis of the knee.
abstract: BACKGROUND
  The choice of surgical treatments for unicompartmental osteoarthritis (OA) of the knee is still somewhat controversial. Midterm results from cases treated using unicompartmental knee arthroplasty (UKA) or open wedge high tibial osteotomy (OWHTO) were evaluated retrospectively.
  
  
  METHODS
  Twenty-seven knees of 24 patients with varus deformities underwent OWHTO and 30 knees of 18 patients underwent UKA surgeries for the treatment of medial compartmental osteoarthritis (OA). The KSS score, FTA, range of motion and complications were evaluated before and after surgery.
  
  
  RESULTS
  The preoperative mean KSS scores were 49 points in the OWHTO group and 62 in the UKA group which improved postoperatively to 89 (excellent; 19 knees, good; 8 knees), and 88 (excellent; 25, good; 4, fair; 1), respectively. There was no significant difference between the OWHTO and UKA scores. Seventeen patients in the OWHTO group could sit comfortably in the formal Japanese style after surgery. The preoperative mean FTA values for the OWHTO and UKA groups were 182 degrees and 184, and at follow-up measured 169 and 170, respectively. In the UKA group, the femoral component and the polyethylene insertion in one patient was exchanged at 5 years post-surgery and revision TKAs were performed in 2 cases. In the OWHTO group, one tibial plateau fracture and one subcutaneous tissue infection were noted.
  
  
  CONCLUSIONS
  Treatment options should be carefully considered for each OA patient in accordance with their activity levels, grade of advanced OA, age, and range of motion of the knee. OWHTO shows an improved indication for active patients with a good range of motion of the knee.
authors.affiliation: Department of Orthopaedic Surgery, Yokohama City University, School of Medicine, 3-9 Fukuura Kanazawa-ku Yokohama city, 236-0004, Japan. take0822@hotmail.com.
authors.forename: Ryohei
authors.initials: R
authors.lastname: Takeuchi
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Umemoto
authors.forename: Masato
authors.initials: M
authors.lastname: Aratake
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Bito
authors.forename: Izumi
authors.initials: I
authors.lastname: Saito
authors.forename: Ken
authors.initials: K
authors.lastname: Kumagai
authors.forename: Yohei
authors.initials: Y
authors.lastname: Sasaki
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Akamatsu
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Ishikawa
authors.forename: Tomihisa
authors.initials: T
authors.lastname: Koshino
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Saito
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