mohammad fakoor; s shahnam mousavi; Ali bahaari
Abstract
AbstractBackground: Medial open wedge high tibial osteotomy (MOWHTO) is effective for the treatment of medial compartment osteoarthritis of the knee. Several studies report that it produces patella baja and increases patellofemoral contact pressure in the patellofemoral joint. Pressure distribution due ...
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AbstractBackground: Medial open wedge high tibial osteotomy (MOWHTO) is effective for the treatment of medial compartment osteoarthritis of the knee. Several studies report that it produces patella baja and increases patellofemoral contact pressure in the patellofemoral joint. Pressure distribution due to underlying varus deformity has a major influence on the onset and development of osteoarthritis in the knee joint. This study is reporting on the effect of MOWHTO on patello-femoral joint.Methods: The present study was a retrospective case series study on the patients with symptomatic osteoarthritis of medial compartment of knee with varus deformity requiring correction, referring in a 2 year period to a teaching hospital. At the last follow-up, assessment of the patellar changes based on Insall and Blackburn indices, and mechanical axis deviation (MAD) measurements was done.Results: A total of 49 knees were recruited. 52.6% of patients were male. The mean age of patients was 26.55±5.876 years and the mean body mass index was 25.05±2.903 kg/m2. No knee needed revision surgery, no intra-articular fracture occured in any patient after surgery.The mean score of VAS[1] increased significantly after surgery (P <0.05). Patellar changes before and after surgery were not statistically significant based on radiographic indices. The mean pre-operative MAD of (−8.90° ± 3.07°) improved to (0.2° ± 2.780°) post-operative value.Conclusion: Based on the above results, proper correction in MAD was obtained and no significant change in patellofemoral joint biomechanics was seen.Keywords: Tibia, patellofemoral joint, Osteotomy, Biomechanics, mechanical axis
