pdf Multi-Factor Biomechanical Assessment of Patient Specific Cranial Implants Using Finite Element Analysis

Khawla H. Rasheed, Auns Qusai Al-Neami, Haider Abdul Raheem Abbas, Maha Mnahy Muosa and Ehab Husain Joda

Abstract

Personalized surgical interventions have been revolutionized by integration of finite element analysis in design and evaluation of craniomaxillofacial patient specific implants. This study aimed to investigate the effect of implant sizes, material type, fixation devices and number of fixations points on biomechanical behavior of cranial implant. Finite element analysis was used to simulate physiological loading conditions. Detailed geometries of implant assembly were included. 144 assembly combinations were analyzed to obtain the maximum Von Mises stresses and total deformation.  Single-Factor without Replication ANOVA was used to analyze the results. They showed that material types have a major impact on both stress distribution and deformation. At the same time, screw and miniplate type haven’t drastically affect the stress distribution or deformation. Other factors like defect size, fixation points and implant texture have significant effect on both stress distribution and deformation. this means that the null hypothesis is rejected.