Lookup NU author(s): Professor Tom Joyce
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Eleven fractured Sutter metacarpophalangeal prostheses were obtained from the hands of three patients. All of the implants had fractured at the junction of the distal stem and the hinge. After visual examination, the fracture faces were prepared and viewed using a scanning electron microscope. These images indicated that fracture was initiated by abrasion on the dorsal aspect of the distal stem of the prostheses, close to the hinge. Crack propagation was shown to be due to a fatigue process. Once a crack started, its direction of travel could be followed, using topographical features common to engineering fracture analyses. Propagation was from radial to ulnar and from dorsal to palmar.
Author(s): Joyce TJ
Publication type: Article
Publication status: Published
Journal: Journal of Hand Surgery
ISSN (print): 1753-1934
ISSN (electronic): 1532-2211
Publisher: Sage Publications Ltd
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