PMID: 9524336Apr 3, 1998Paper

Total shoulder replacement by magnetic arthroplasty

Journal of Shoulder and Elbow Surgery
L DoursounianA Apoil

Abstract

Permanent magnets offer a novel solution to the problem of shoulder implant instability when the rotator cuff has been destroyed. We report a case of their use in a 66-year-old patient with a large proximal humerol breast cancer metastasis. Humerol resection was below the deltoid insertion. The polyacetal device had samarium-cobalt magnets in the humeral head. The glenoid component (the keeper in the magnetic circuit) was made of titanium nitride-coated F17 stainless steel. The system's breakaway force was ca. 40 N. At 24 months the shoulder was free of pain and stable, with an active range of movement of 30 degrees flexion, 45 degrees external rotation, and internal rotation to T8. The patient could perform household tasks and drive an automatic car. Radiography showed no implant loosening or upward humeral head dislocation. Subsequently, the patient's condition deteriorated; at 33 months she was bedridden, and radiography showed dislocation of the humeral component.

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Citations

Sep 12, 2008·British Journal of Health Psychology·Melissa K Hyde, Katherine M White
May 10, 2005·Journal of the American Geriatrics Society·Henry S PerkinsHelen P Hazuda
Jun 16, 2009·Health Education Research·Melissa K Hyde, Katherine M White
Jan 12, 2008·Journal of Advanced Nursing·Magi SqueDiana Allardyce
Jan 20, 2010·Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association·Nichon E JansenAndries J Hoitsma
Apr 14, 2006·Gastroenterology Nursing : the Official Journal of the Society of Gastroenterology Nurses and Associates·Kathy B Bean

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