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Prediction of the outcome of transtrochanteric rotational osteotomy for osteonecrosis of the femoral head

K. Miyanishi, MD, Postdoctoral Fellow1; Y. Noguchi, MD, Associate Professor of Orthopaedic Surgery1; T. Yamamoto, MD, Postdoctoral Fellow1; T. Irisa, MD, Postdoctoral Fellow1; E. Suenaga, MD, Postdoctoral Fellow1; S. Jingushi, MD, Associate Professor of Orthopaedic Surgery1; Y. Sugioka, MD, President of Kyushu University2; and Y. Iwamoto, MD, Professor and Chairman of Orthopaedic Surgery1

1 Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
2 Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan.

Correspondence should be sent to Dr K. Miyanishi.

We have studied the correlation between the prevention of progressive collapse and the ratio of the intact articular surface of the femoral head, after transtrochanteric rotational osteotomy for osteonecrosis. We used probit analysis on 125 hips in order to assess the ratio necessary to prevent progressive radiological collapse over a ten-year period. The results show that a minimum postoperative intact ratio of 34% was required. This critical ratio may be useful for surgical planning and in assessing the natural history of the condition.




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S. Ikemura, T. Yamamoto, S. Jingushi, Y. Nakashima, T. Mawatari, and Y. Iwamoto
Leg-length discrepancy after transtrochanteric curved varus osteotomy for osteonecrosis of the femoral head
J Bone Joint Surg Br, June 1, 2007; 89-B(6): 725 - 729.
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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General