Mechanical behavior of bulk direct composite versus block composite and lithium disilicate indirect Class II restorations by CAD-FEM modeling

Abstract

Bulk filling resin composite with 1% linear polymerization shrinkage negatively affected the mechanical behavior of class II MOD restored teeth. Class II MOD direct resin composite showed greater potential for damage because of higher internal and marginal stress evolution during resin polymerization shrinkage. With a large class II MOD cavity an indirect composite or a lithium disilicate inlay restoration may provide a mechanical response close to that of a sound tooth.

Modal analysis for implant stability assessment: Sensitivity of this methodology for different implant designs

“…Numerical models like those developed here and in previous work [27][28][29][30][31][32] can provide a useful tool to understand experimental results and to optimize the measurement protocol. These models can be further improved by simulating bone maturation.…”

“…Modern CAD-FEM (Computer Aided Design and Finite Element Method) methodologies have been extensively used in biomedical investigations to characterize biomechanical responses in dental applications [27][28][29][30][31][32].…”

Mechanical behavior of endodontically restored canine teeth: Effects of ferrule, post material and shape

“…As reported in the literature, FE analysis has been frequently employed to study stress and strain distributions in teeth restored with adhesive techniques involving different approaches and materials [43][44][45].…”

Endocrown restorations: Influence of dental remnant and restorative material on stress distribution

“…The endocrown was then formed by the pulp chamber extension, and the portion corresponding to the occlusal was cut by a Boolean union. The cement layer was modeled with 70-m thickness [11] between the internal surfaces of the restoration and bonding surfaces of the teeth.…”

“…Polyurethane mimics bone tissue and is widely used in in vitro and in silico (mathematical) studies due to its elastic modulus (E = 4 MPa), having been validated as a substitute for human bone tissue. The incorporated resin cement had E = 6 GPa and = 0.30 (linear shrinkage = 2.7%) [11]. The models were imported through STEP format for the analysis software (ANSYS 17.2, ANSYS Inc., Houston, TX, USA), in which they were divided into mesh composed of nodes (196,716) and tetrahedral elements (94,896) (Fig.…”