Biomedical subjects
Publications and source records attributed to G Masetti.
Thirty two consecutive cases of interilioabdominal amputation are reported. They were performed for malignant tumours of the hip and the proximal end of the femur and thigh. This operation is rather more frequently indicated than disarticulation of the hip and involves less trauma.
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The authors report data obtained for 11 cases of explants of prostheses having ceramic joint surfaces. The wear phenomena observed in 9 prostheses, including 1 case with breakage of the ceramic head, was moderate: 20-22,000 debris per mu 2. In 2 cases the wear was massive, with a concentration of debris in the peri-implant tissues 5-10 times greater (100,000-218,000 debris per mu 2). An explanation for the trigger mechanism of wear phenomena is proposed: the cases of massive wear are related to loosening of the acetabulum. A histological examination of the bone tissue surrounding a stem covered with alumina (Al2O3) carried out in three cases allowed us to observe an area of demineralization measuring approximately 500 mu of tissue in contact with the ceramic coating. The osteomalacia could be caused by the diffusion of alumina ions.
The authors report 21 cases of fracture of the femoral neck in the young adult followed-up after a minimum of 2 years, which is a sufficient amount of time to be able to evaluate cephalic necrosis. The results obtained with the various methods of osteosynthesis were: excellent: 38%; good: 33.5%; fair: 9.5%; poor: 19%. Emphasis is made on the effectiveness of the Garden classification system for prognosis and treatment, and several aspects of the method used are discussed.
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