Delayed- and non-union following opening wedge high tibial osteotomy: surgeons’ results from 182 completed cases
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Opening wedge high tibial osteotomy (OWHTO) is a recently described procedure for medial compartment arthritis of the knee in the active, younger population. Despite having a number of advantages over the traditional closing wedge high tibial osteotomy (CWHTO) a potential complication of OWHTO is a high rate of delayed- and non-union. This study reports the occurrence of delayed- and non-union following OWHTO for medial compartment arthritis of the knee. Questionnaires were sent to all current members of the Australian Knee Society (n=45), a special interest group of the Australian Orthopaedic Group. Surgeons were asked primarily to indicate how many OWHTOs they had performed, and how many of these had progressed to union, delayed-union and non-union. All 45 questionnaires were returned, with 21 surgeons (47%) performing OWHTOs. A total of 188 OWHTO cases were reported, of which 182 were complete. Of these complete cases 167 (91.8%) were classed as united, 12 (6.6%) delay-united and 3 (1.6%) non-united. The results of this study demonstrate that the rate of delayed- and non-union following OWHTO for medial compartment arthritis of the knee is relatively low and comparable to that reported for traditional CWHTO.
KeywordsFracture fixation Knee Orthopedics Osteoarthritis Osteotomy
The authors thank all members of the Australian Knee Society, a special interest group of the Australian Orthopaedic Association, for their completion of the questionnaire. This work was presented at the Combined New Zealand and Australian Knee and Sports Surgery Society Meeting in Queenstown, New Zealand, October 2001. S.J.W. holds a National Health and Medical Research Council (Australia) CJ Martin Fellowship (Regkey no. 209169). K.M.C. holds a National Health and Medical Research Council (Australia) Health Professional Training Fellowship (Regkey no. 209168).
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