Chinese Journal of Clinical Anatomy >
Finite element analysis of the calcaneal fractures of Sanders type Ⅱ fixed with locking plates in the internal and external position
Received date: 2014-03-26
Online published: 2014-12-04
Objective To compare the biomechanical properties of the calcaneal fractures of Sanders type Ⅱ fixed with locking plates in the internal and external position using finite element(FE) analysis, and therefore to provide theoretic reference for clinic application. Methods 3D FE model of the calcaneal fractures of Sanders type Ⅱ fixed with locking plates in the internal and external position was constructed. The two fixation models were loaded under the same condition，and 1inear finite element analysis was carried out．The stress distribution in the two fixation models was calculated respectively. Results Under the neutral position load the maximum displacement of the fracture lines in the two fixation models were less than fracture lines displacement requirement greater than 1 mm;the peak value of the maximum principle stress of the calcaneus in the two fixation models,located mainly around the cortical bones of calcaneal tuberosity, were less than the yield strength of 95 Mpa; the peak value of the maximum principle stress of the locking plate in the two fixation models, mainly located in the middle section of the locking plate, were less than the internal fixation failure strength of 225 MPa. Conclusion The biomechanical stability is satisfactory for the treatment of the calcaneal fractures of Sanders type Ⅱ fixed with locking plates in the internal and external position.The latter have potential application in clinic compared with the former in the treatment of calcaneal fractures of Sanders type Ⅱ.
Key words： Calcaneus; Fractures; Finite element analysis; Locking plate
YANG Pan , ZHANG Ying , LIU Jian , XIAO Jin , XIE Lin-Jiang . Finite element analysis of the calcaneal fractures of Sanders type Ⅱ fixed with locking plates in the internal and external position[J]. Chinese Journal of Clinical Anatomy, 2014 , 32(6) : 716 -720 . DOI: 10.13418/j.issn.1001-165x.2014
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