title: Comparison of closing-wedge and opening-wedge high tibial osteotomies for medial compartment osteoarthritis of knee in Asian population: Mid-term follow-up.
abstract: BACKGROUND
  Valgus high tibial osteotomy (HTO) is a well-established treatment option for patients with early osteoarthritis of the medial compartment of the knee. It is achievable with either open-wedge or closed-wedge technique. The aim of the study was to compare the radiological and clinical outcomes following HTO done with open- and closed-wedge techniques.
  
  
  METHODS
  Two groups of patients undergoing HTO and fixation with locking plates were compared. Twenty-five patients were operated using medial open-wedge technique and 23 using closed-wedge technique between January 2000 and June 2014. They were compared on the basis of Hospital for Special Surgery (HSS), knee score, preoperative and postoperative range of motion, femoro-tibial angle and duration required for full-weight bearing. Early and late postoperative complications were noted.
  
  
  RESULTS
  Median HSS score at 6 months and 1 year post-surgery was better in the open-wedge technique group. The range of motion was also higher at early follow-up in the open-wedge technique group, with shorter duration for full-weight bearing. Delayed union was seen in two patients in the open-wedge technique group and four patients in closed-wedge group. Peroneal nerve palsy was noted in two patients in the closed-wedge group.
  
  
  CONCLUSIONS
  Both open-wedge and closed-wedge HTO lead to good and comparable results. However, the technique of open-wedge osteotomy provided better outcome in terms of functional scores in early as well as late follow-up with decreased duration required for full-weight bearing.
authors.affiliation: P.D. Hinduja National Hospital and Medical Research Centre, Veer Savarkar Marg Mahim, Mumbai 400016, India.
authors.forename: Sanjay
authors.initials: S
authors.lastname: Agarwala
authors.affiliation: Darlington Memorial Hospital, County Durham & Darlington Foundation Trust, DL3 6HX, United Kingdom.
authors.forename: Anshul
authors.initials: A
authors.lastname: Sobti
authors.affiliation: P.D. Hinduja National Hospital and Medical Research Centre, Veer Savarkar Marg Mahim, Mumbai 400016, India.
authors.forename: Siddhant
authors.initials: S
authors.lastname: Naik
authors.affiliation: P.D. Hinduja National Hospital and Medical Research Centre, Veer Savarkar Marg Mahim, Mumbai 400016, India.
authors.forename: Sameer
authors.initials: S
authors.lastname: Chaudhari
keywords: CWHTO; High tibial osteotomy; Lateral closing-wedge osteotomy; MOWHTO; Medial opening-wedge osteotomy