Age, weight and extent of osteonecrosis linked to secondary collapse

A patient's age, weight and the extent of osteonecrosis are all determining factors in secondary collapse following transtrochanteric rotational osteotomy of the femoral head, according to new research.

The study, published in the European Journal of Bone and Joint Surgery, also showed that the factors would all influence the likelihood that a patient would have to undergo conversion to total hip arthroplasty.

Looking at 105 patients (a total of 113 hips), all of whom underwent anterior transtrochanteric rotational osteotomy for the treatment of femoral head osteonecrosis, the researchers concluded that all of the above factors should be taken into account before proceeding with surgery.

During the course of the study, which followed patients for an average of 51.3 months, secondary collapse occurred in 27 hips (24 per cent), while fourteen (12 per cent) underwent conversion to total hip arthroplasty.

Recent research published in the Journal of Clinical Endocrinology & Metabolism showed that weakness of the hip could be hereditary.

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