Biomechanical Evaluation of CAD/CAM Inlay Restorations Through Experimental Flexural Strength Testing and Finite Element Analysis
Omer Sagsoz, Mehmet Yildiz, Hojjat Ghahramanzadeh Asl
TL;DR
This study evaluates how different CAD/CAM materials used for dental inlays perform under stress through experiments and computer modeling.
Contribution
The study combines experimental flexural strength testing with finite element analysis to assess biomechanical behavior of CAD/CAM inlay materials.
Findings
Maximum von Mises stresses inversely correlate with material elasticity.
IPS e.max CAD showed the highest von Mises stress (45.571 MPa), while Lava Ultimate had the lowest (25.419 MPa).
All materials remained below their flexural strength limits under simulated occlusal loading.
Abstract
Background: This study aimed to investigate the biomechanical behavior of conservative inlay restorations fabricated from different CAD/CAM materials by combining experimental flexural strength testing with finite element analysis. Methods: Five CAD/CAM materials were evaluated: feldspathic ceramic (Cerec Blocs), leucite-reinforced ceramic (IPS Empress CAD), resin nano-ceramic (Lava Ultimate), polymer-infiltrated ceramic network (VITA Enamic), and lithium disilicate ceramic (IPS e.max CAD). Young’s modulus and Poisson’s ratio were experimentally determined using three-point bending and nanoindentation tests and used as inputs for 3D FEA. Von Mises (VM) stress distributions within the inlays were analyzed under simulated occlusal loading. Results: Maximum VM stresses showed an inverse relationship with material elasticity. IPS e.max CAD exhibited the highest maximum VM stress (45.571…
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Taxonomy
TopicsDental materials and restorations · Endodontics and Root Canal Treatments · Bone Tissue Engineering Materials