title: Modeling of damage driven fracture failure of fiber post-restored teeth.
abstract: Mechanical failure of biomaterials, which can be initiated by either violent force, or progressive stress fatigue, is a serious issue. Great efforts have been made to improve the mechanical performances of dental restorations. Virtual simulation is a promising approach for biomechanical investigations, which presents significant advantages in improving efficiency than traditional in vivo/in vitro studies. Over the past few decades, a number of virtual studies have been conducted to investigate the biomechanical issues concerning dental biomaterials, but only with limited incorporation of brittle failure phenomena. Motivated by the contradictory findings between several finite element analyses and common clinical observations on the fracture resistance of post-restored teeth, this study aimed to provide an approach using numerical simulations for investigating the fracture failure process through a non-linear fracture mechanics model. The ability of this approach to predict fracture initiation and propagation in a complex biomechanical status based on the intrinsic material properties was investigated. Results of the virtual simulations matched the findings of experimental tests, in terms of the ultimate fracture failure strengths and predictive areas under risk of clinical failure. This study revealed that the failure of dental post-restored restorations is a typical damage-driven continuum-to-discrete process. This approach is anticipated to have ramifications not only for modeling fracture events, but also for the design and optimization of the mechanical properties of biomaterials for specific clinically determined requirements.
authors.affiliation: College of Stomatology, Chongqing Medical University and Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences and Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, 426# Songshi North Road, Yubei District, Chongqing 401147, China.
authors.forename: Binting
authors.initials: B
authors.lastname: Xu
authors.affiliation: State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan 430079, PR China. Electronic address: wang.yn@whu.edu.cn.
authors.forename: Yining
authors.initials: Y
authors.lastname: Wang
authors.affiliation: State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan 430079, PR China. Electronic address: li.q@whu.edu.cn.
authors.forename: Qing
authors.initials: Q
authors.lastname: Li
mesh_terms: D019232:Dental Restoration Failure; D020342:Finite Element Analysis; D016014:Linear Models; D008422:Materials Testing; D055595:Mechanical Phenomena; D017711:Nonlinear Dynamics; D016474:Weight-Bearing
keywords: Ferrule height; Fracture failure; Post-restored teeth; Solid 65 element; Virtual simulation