A comprehensive ESPI based system for combined measurement of shape and deformation of electronic components

Journal of Biomechanics

Pappalettere

2005

Section: Introductionmentioning

confidence: 99%

Finite element analysis of a new customized composite post system for endodontically treated teeth

Journal of Biomechanics

Pappalettere

2005

“…Full explanations on the theory behind spatial and frequency domain filtering operations can be found in refs. [12,13,41,42,[52][53][54].…”

Section: Optical Measurement Of Tooth Deformations With Electronic Spmentioning

confidence: 99%

Experimental–Numerical Investigation on the Biomimetic Recovery of Natural Tooth Structural Response after Porcelain Veneer Restoration

Cosola

et al. 2011

Strain

This study analyzes the effect of porcelain veneer restoration on the structural response of a maxillary incisor. Tooth deformation is evaluated, prior to and after restoration, by the synergic use of Phase‐Shifting Electronic Speckle Pattern Interferometry (PS‐ESPI) and 3D finite element (FE) analyses. The intact maxillary incisor and the porcelain veneer restored tooth are subject to flexural load. Displacement fields are measured with Phase‐Shifting Electronic Speckle Pattern Interferometry. Experimental tests are simulated with 3D FE analyses tuning materials parameters via an optimisation‐based inverse procedure. ESPI measurements indicate that the restoration design under study produced deformations very similar to those of the intact tooth under load. FE results show sharp changes in displacement and stress 1 mm above the cement–enamel junction on the facial side of the restored tooth. Severe stress concentration (about 50% increase with respect to natural tooth) appears at the interface between veneer restoration and intact enamel and dentine tissues. This confirms the hypothesis that veneer restorations can amplify the effect of occlusal loading on the loss of dental hard tissue in the tooth cervical region.

show abstract

“…The illumination angle h made by the laser beams with the direction of observation is 20°. More details on the optical set-up used in this research can be found in Genovese et al (2004).…”

Section: Composite Materials Characterizationmentioning

confidence: 99%

Improved global–local simulated annealing formulation for solving non-smooth engineering optimization problems

International Journal of Solids and Structures

Pappalettere

2005