We studied the prognostic value of MRI in 32 radiographically normal, asymptomatic hips in 25 patients at risk of osteonecrosis from glucocorticoids or alcoholism. The early findings were band-like hypointense zones on spin-echo images. No operations were performed. Life-table survival curves showed that
It has been suggested that transient osteoporosis or the bone marrow oedema syndrome (BMOS) may be the initial phase of osteonecrosis of the
1. The
Human articular cartilage taken from 92
The results of a long-term review of 102 hips in eighty-seven patients with Perthes' disease are described, the mean follow-up interval being seventeen years. All had been treated by an extremely rigorous conservative regime in which the patients were kept in hospital for an average period of twenty-six months, during which time they were confined to bed with the legs in wide abduction, first in traction and later in "broomstick" plasters to ensure "containment" of the
We have reviewed 54 hips in 46 patients from 2 to 14 years after a joint-preserving operation for idiopathic avascular necrosis of the
Twenty-nine patients with avascular necrosis of the
We examined stainless-steel, cobalt-chrome, titanium and alumina and zirconia ceramic
The extent of necrosis is the main determining factor in the outcome of osteonecrosis of the
We studied nine patients who had had a transtrochanteric anterior rotational osteotomy, as developed by Sugioka, for osteonecrosis of the
We performed 41 core decompressions in 32 patients for stage I or stage II osteonecrosis of the
1. The surgical treatment of idiopathic aseptic necrosis of the
Multiple drilling is reported to be an effective treatment for osteonecrosis of the
The clinical and pathological findings in a case of early avascular necrosis of the
We have studied the correlation between the prevention of progressive collapse and the ratio of the intact articular surface of the
In this prospective study of 18 hips we compared the efficacy of ultrasound with CT in determining the position of the
1. The pathology of avascular necrosis of bone and its relationship to the radiographic changes are considered briefly. 2. The inadequacy of radiographic examination in the early diagnosis of avascular necrosis is stressed. 3. Methods of early assessment of the residual vascularity of a bone mass are discussed. 4. Details of the principles, methods, and results of using radioactive phosphorus in the diagnosis of avascularity of bone are described. 5. The dangers and technical difficulties of using radioactive substances are discussed. 6. The possibility is envisaged that surgeons may soon be able to determine at the time of emergency operation whether the
Excision of the proximal femur for tumour with
prosthetic reconstruction using a bipolar
It has been shown by mechanical analysis that by using cement to bond the stem of a