Thermal-stress analysis of ceramic laminate veneer restorations with different incisal preparations using micro-computed tomography-based 3D finite element models

Mechanical and thermal stress evaluation of PEEK prefabricated post with different head design in endodontically treated tooth: 3D-finite element analysis

“…Overall, temperature changes and resulting stresses on restorative materials and remaining tooth layers induced by the cold thermal loading simulations were found to be higher than those of hot thermal loadings. This result was in agreement with the other studies 30,60,86) , as they pointed out that the tensile stress occurs on the surface of restoration as a result of the temperature difference and larger convection coefficient during cold thermal loading may increase the risk of failure compared to hot thermal loading.…”

“…The materials used in the present simulation were assumed to be homogenous, isotropic and linear elastic. Since the analysis was performed for two purposes, mechanical and thermal properties of all materials (Young's modulus, Poisson's ratio, density, specific heat, thermal expansion coefficient, and thermal conductivity) were defined for every part of the assembly according to previous literature data 41,[60][61][62][63][64] , and have been presented in Table 1.…”

“…All prepared assembly has meshed for finite element simulations. 3D 10-node tetrahedral elements were used to be compatible with model irregular meshes and complex geometries of dental structures 60) . The standard convergence tests were applied to all models in each test stage, the mesh was considered satisfactory when even with decreasing the size of elements, and the highest stress levels remained constant to represent the original geometry accurately.…”

“…For the cold thermal simulation, the same procedure was performed for a temperature of 5°C. These thermal loads and time intervals were established based on the measurements from previous literature 30,60,64) , while the FEA should not be used to represent long term effects of low-order heating or cooling of the teeth that might occur during eating or drinking, because is not possible to give a large number of typical results, as a few representative situations will be noted 66) .…”

Marginal discrepancy and load to fracture of monolithic zirconia laminate veneers: The effect of preparation design and sintering protocol

“…As preservation of tooth structure is pertinent, adequate space must exist for the restorative material to possess proper thickness for optical properties and strength. Different preparation guidelines are recommended based on the necessity to modify the tooth length and faciolingual width [3][4][5] . Among different preparation designs, Incisal overlap tooth preparation may be indicated in case of modification of the incisal edge is required.…”