الفهرس 
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Abstract
Genu varum is a common deformity, often leads to mechanical axis deviation and stress maldistribution across the knee joint, with subsequent knee medial compartment osteoarthritis. Preoperative measurements of the degrees of varus deformity is essential to overcorrect the deformity and putting the knee in net 5 degrees valgus position.
Many intervention techniques were described in literature for correcting the varus knee, briefly: medial opening wedge and lateral closed wedge high tibial osteotomies, unicompartmental knee and total knee arthroplasty. The incidence of osteotomies has decreased with the popularisation of knee arthroplasties, but it is still indicated in young and active patients. Results of HTO tend to be the most promising of all correctional intervention options to selected patients, especially when taking into consideration the feasibility, less invasiveness, faster healing and daily life resuming advantages.The aim of this study is to prove that MOWHTO is the optimal treatment of isolated unicompartmental knee MCOA complicating genu varum, in selected patients. In order to fulfill the mentioned aim, we performed thirteen MOWHTOs in twelve patients lying within the inclusion criteria group, with subsequent regular follow up for nearly a year.The results of the study revealed mean period of healing at 12 weeks, with four osteotomies having delayed union, one having non-union and required a second surgery. The varus deformity was successfully corrected in eleven knees, two under corrected due to technical faults. Pain relieved in a mean period of eight months. Slight decrease in patellar height and increase in posterior tibial slope were observed postoperatively, but with no functional effect. All patients managed to resume daily activities, careers and mildly strenuous activities. No issues were observed in post-operative knee stability. Full ROM was successfully restored in all patients.