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J M Sheehan

Publications and source records attributed to J M Sheehan.

47 records · Page 3Linked to original sources
PubMedDate not supplied

A case of double fracture in total hip replacement.

Femoral stem failure in total hip replacement is uncommon. It tends to occur predominantly in males over 1.8 m in height and over 76 kg in weight. Poor or inadequate cementing technique may lead to cement failure, which may be seen as roentgenographic lucencies present by as much as 12 months prior to actual stem failure. This article reports on a case of double stem failure, together with a full metallurgical examination, which indicated loosening of the implant prior to eventual failure from overload. Although one of the fractures occurred across an area of relative weakness in the stem material, this was not felt to be the principal cause of failure.

Biomedical Engineering↗
PubMedDate not supplied

Arthroplasty of the knee.

A stable polycentric knee mechanism which allows axial rotation as well as simulating other knee movements was introduced into clinical use in 1971. The surgical and mechanical problems that presented over the past 7 1/2 years have greatly helped in improving our understanding of knee reconstruction and design. A patient satisfaction rate of 95% compares favorably with the results achieved with hip arthroplasty but the complexity of knee reconstruction far outweights that of the hip.

Arthritis, Rheumatoid↗