Document Detail

The clinical and radiographic results of intertrochanteric curved varus osteotomy for idiopathic osteonecrosis of the femoral head.
MedLine Citation:
PMID:  24394984     Owner:  NLM     Status:  Publisher    
PURPOSE: In this study, postoperative results of intertrochanteric curved varus osteotomy (CVO) for idiopathic osteonecrosis of the femoral head (ION) were studied retrospectively and optimal indication of CVO was considered.
METHODS: Between 1995 and 2011, CVO was performed in 51 patients (53 hips) for the treatment of ION in our department. The patients who had the potential to obtain acetabular coverage of more than one-third of the intact articular surface on pre-operative AP hip radiographs in maximum abduction were considered suitable for this operation. For radiological assessment, a ratio of necrotic volume, a ratio of postoperative intact surface on the weight-bearing area, progression of collapse, shortening length of the lower limb, and lateralization of great trochanter were evaluated.
RESULTS: The mean ratio of necrotic volume was 16.9 %. The mean ratio of postoperative intact surface on the weight-bearing area of the femoral head was 51.7 %. The progression of collapse was observed in two hips (ratio of necrotic volume 10.4, 39.8 %; ratio of postoperative intact area 36.5, 38.1 %). The mean shortening length of the lower limb was 9 mm, and the mean lateralization of great trochanter was 3 mm. One hip (ratio of necrotic volume 11.6 %, ratio of intact area 35.8 %) was converted to THA because of the progression of osteoarthritis at 55 months after CVO.
CONCLUSION: The results of CVO for ION were successful, if this procedure was indicated for cases with intact load-bearing area more than 40 %.
Michio Hamanishi; Yuji Yasunaga; Takuma Yamasaki; Ryo Mori; Takeshi Shoji; Mitsuo Ochi
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-1-7
Journal Detail:
Title:  Archives of orthopaedic and trauma surgery     Volume:  -     ISSN:  1434-3916     ISO Abbreviation:  Arch Orthop Trauma Surg     Publication Date:  2014 Jan 
Date Detail:
Created Date:  2014-1-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9011043     Medline TA:  Arch Orthop Trauma Surg     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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