The sustentaculum tali screw fixation for the treatment of Sanders type Ⅱ calcaneal fracture:A finite element analysis
作者单位：宁波二院
会议名称：《2016年浙江省骨科学学术年会》
会议日期：2016年
学科分类：1002[医学-临床医学] 100210[医学-外科学(含：普外、骨外、泌尿外、胸心外、神外、整形、烧伤、野战外)] 10[医学]
关 键 词：Calcaneal fracture Sustentaculum tali Screws Finite element analysis Biomechanics
摘 要：Objective In the surgery of calcaneal fracture,whether the sustentaculum tali screw should always be placed is widely *** aim of this study is to explore the necessity and function of the sustentaculum tali screw placement for the treatment of Sanders type □ calcaneal fracture. Methods The finite element analysis was used in this *** the establishment of the finite element model of Sanders type,calcaneal fracture,the two internal fixation simulations were *** one model, the AO calcaneal plate was simulated on the lateral side of the calcanues with 7 screws being fixated at different position of the plate,In the other model,the calcaneus was fixated with the same AO calcaneal plate together with an additional screw being infiltrated into the sustentaculum *** two models were simulated under the same loading and the displacement of the fracture line and the stress distribution in the two models were calculated respectively. Results The maximum principal stress focused on the cortical bone of sustentaculum tali in both of the models under the same *** displacement of the fracture line,the maximum principal stress of calcaneus and internal fixation system in the model with sustentaculum screw fixation were smaller than that in the model without sustentaculum screw *** stress in the model with sustentaculum screw fixation was more dispersed. Conclusions The placement of sustentaculum tali screw is essential for fixation of type II calcaneal fracture to achieve the biomechanical stability.