The Causes Of Redislocation After Open Reduction Of Developmental Dysplasia Of The Hip And Some Preventions

ObjectiveMaking a summary of the treatment experience of redislocated hipsafter open reduction of developmental dysplasia of the hip, to investigatethe causes of redislocation after open reduction of developmental dysplasiaof the hip and put forward some appropriate preventive measures.MethodsFrom2004to2013,23patients with redislocated hips after openreduction of developmental dysplasia of the hip were reviewed. Dependingon the medical histories, images and the findings during reopen reductions,the causes of redislocation of these hips were analyzed, and put forwardsome appropriate preventive measures.ResultsAll of the23patients received good reduction after re-operation withopen reduction, and all of them were followed up ranging from6to65months, average28months. After reoperation, according to the Mckay’s classification to evaluate the hip joint function, the rate of excellent andwell hips was up to78.3％,with8excellent hips,10well hips,3acceptablehips and2poor hips.ConclusionsThe causes of redislocation of open reduction of developmentaldysplasia of the hip include: selecting incorrect operation method, improperhandling of the femoral anteversion angle, improper femoral shortening ornot shortened, improper release of soft tissue, joint capsule tightened is notenough, improper postoperative nursing and functional exercise,deficientposterior border of acetabulum, the development rate of acetabulum andhead of femur are not synchronized, infection and so on. Only we know thetype of pathology, the sufficient preoperative preparation, the appropriateoperation method, the proper release of soft tissue, to meet the concentricreset of the femoral head and acetabulum, combined with the prevention ofinfection, good postoperative external fixation and functional exercise, andwe can effectively reduce the risk of DDH postoperative dislocation.