Finite element analysis of internal fixation treatment for Sanders type Ⅱ B calcaneal fracture
Objective:To compare the biomechanical stability of five internal fixation methods for Sanders type Ⅱ B calcaneal fracture through finite element analysis.Methods:A healthy adult male volunteer was recruited to create a Sanders type Ⅱ B calcaneal fracture model via software such as Mimics 21.1 and Geomagic wrap 2021.Five internal fixation methods were simulated to treat the calcaneal fracture,including the lateral anatomical plate of the calcaneus(LAP),nail-in-nail internal fixation system(NIS),calcaneal invasive plate via a sinus tarsi approach(CIP),calcaneal minimally plate+nail-in-nail internal fixation system(CMP+NIS),and sustentaculum tali screw+nail-in-nail internal fixation system(STS+NIS).The biomechanical stability of these methods was compared.Results:①Internal fixation stress:LAP>NIS>STS+NIS>CMP+NIS>CIP;②Bone fragment displacement:CIP<LAP<CMP+NIS<1 mm<STS+NIS<NIS;③Bone fragment stress:STS+NIS>NIS>LAP>CMP+NIS>CIP.Conclusions:LAP,CIP,and CMP+NIS methods provide relatively ideal biomechanical stability for the internal fixation of calcaneal fractures and are recommended for clinical application.
Sanders Type Ⅱ B Calcaneal FractureInternal Fixation MethodThree-Dimensional Finite Element
NETL
NSTL
万方数据
