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Failure analysis of the fractured wires in sternal perichronal loops

AuthorsChao, Jesús; Voces, R.; Peña, Carmen
KeywordsSternal dehiscence
Stainless steel
Perichronal loop
Issue Date2011
CitationJournal of the Mechanical Behavior of Biomedical Materials 4 (7): 1004-1010 (2011)
AbstractWe report failure analysis of sternal wires in two cases in which a perichronal fixation technique was used to close the sternotomy. Various characteristics of the retrieved wires were compared to those of unused wires of the same grade and same manufacturer and with surgical wire specifications. In both cases, wire fracture was un-branched and transgranular and proceeded by a high cycle fatigue process, apparently in the absence of corrosion. However, stress anlysis indicates that the effective stress produced during strong coughing is lower than the yield strength. Our findings suggest that in order to reduce the risk for sternal dehiscence, the diameter of the wire used should be increased. © 2011 Elsevier Ltd.
Identifiersdoi: 10.1016/j.jmbbm.2011.02.015
issn: 1751-6161
Appears in Collections:(CENIM) Artículos
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