Biomechanical Dynamics of Cranial Sutures during Simulated Impulsive Loading

[摘要] Background. Cranial sutures are deformable joints between the bones of theskull, bridged by collagen fibres. They function to hold the bones of the skull together while allowing for mechanical stress transmission and deformation.Objective. The aim of this study is to investigate how cranial suture morphology,suture material property, and the arrangement of sutural collagen fibres influence thedynamic responses of the suture and surrounding bone under impulsive loads.Methods. An idealized bone-suture-bone complex was analyzed using a two-dimensional finite element model. A uniform impulsive loading was applied to the complex. Outcome variables of von Mises stress and strain energy were evaluatedto characterize the sutures’ biomechanical behavior.Results. Parametric studies revealed that the suture strain energy and the patterns of Mises stress in both the suture and surrounding bone were strongly dependent onthe suture morphologies.Conclusions. It was concluded that the higher order hierarchical suturemorphology, lower suture elastic modulus, and the better collagen fiber orientation must benefit the stress attenuation and energy absorption.

[学科分类] 生物技术