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. 2002 Jan 17;26(1):31–35. doi: 10.1007/s00264-001-0311-7

Core decompression in early stages of femoral head osteonecrosis – an MRI-controlled study

N Aigner 1, W Schneider 1, V Eberl 1, K Knahr 1
PMCID: PMC3620848  PMID: 11954846

Abstract.

We treated 45 hips with idiopathic necrosis of the femoral head stages I–III with core decompression. Average age of patients was 41 (27–68) years and average follow-up 68.9 (31–120) months. In 30 hip joints in stage I, 29 showed no radiographic progression and a complete remission of the changes consistent with necrosis on MRI at the last follow-up. In 27 patients the clinical result – based on the Harris Hip Score (HHS) assessment – was excellent (average HHS 91.9 points). Of nine hips in stage II, four had received a total hip arthroplasty, one had deteriorated to stage IV, and four were still classified as stage II (average HHS 95 points). Of six hips in stage III, three had received a total hip arthroplasty and three had deteriorated to stage IV (average HHS 73 points).

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