Publikationen

Chairside CAD/CAM materials. Part 1: Measurement of elastic constants and microstructural characterization

Autor(en)
Renan Belli, Michael Wendler, Dominique de Ligny, Maria Rita Cicconi, Anselm Petschelt, Herwig Peterlik, Ulrich Lohbauer
Abstrakt

Objective. A deeper understanding of the mechanical behavior of dental restorative materials requires an insight into the materials elastic constants and microstructure. Here we aim to use complementary methodologies to thoroughly characterize chairside CAD/CAM materials and discuss the benefits and limitations of different analytical strategies.
Methods. Eight commercial CAM/CAM materials, ranging from polycrystalline zirconia (e.max ZirCAD, Ivoclar-Vivadent), reinforced glasses (Vitablocs Mark II, VITA; Empress CAD, Ivoclar-Vivadent) and glass-ceramics (e.max CAD, Ivoclar-Vivadent; Suprinity, VITA; Celtra Duo, Dentsply) to hybrid materials (Enamic, VITA; Lava Ultimate, 3M ESPE) have been selected. Elastic constants were evaluated using three methods: Resonant Ultrasound Spectroscopy (RUS), Resonant Beam Technique (RBT) and Ultrasonic Pulse-Echo (PE). The microstructures were characterized using Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDX), Raman Spectroscopy and X-ray Diffraction (XRD).
Results. Young's modulus (E), Shear modulus (G), Bulk modulus (B) and Poisson's ratio (v) were obtained for each material. E and v reached values ranging from 10.9 (Lava Ultimate) to 201.4 (e.max ZirCAD) and 0.173 (Empress CAD) to 0.47 (Lava Ultimate), respectively. RUS showed to be the most complex and reliable method, while the PE method the easiest to perform but most unreliable. All dynamic methods have shown limitations in measuring the elastic constants of materials showing high damping behavior (hybrid materials). SEM images, Raman spectra and XRD patterns were made available for each material, showing to be complementary tools in the characterization of their crystal phases.
Significance. Here different methodologies are compared for the measurement of elastic constants and microstructural characterization of CAD/CAM restorative materials. The elastic properties and Crystal phases of eight materials are herein fully characterized.

Organisation(en)
Dynamik Kondensierter Systeme
Externe Organisation(en)
Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Universidad de Concepción
Journal
Dental Materials
Band
33
Seiten
84-98
Anzahl der Seiten
15
ISSN
0109-5641
DOI
https://doi.org/10.1016/j.dental.2016.10.009
Publikationsdatum
01-2017
Peer-reviewed
Ja
ÖFOS 2012
302088 Zahn-, Mund- und Kieferheilkunde, 103018 Materialphysik
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/chairside-cadcam-materials-part-1-measurement-of-elastic-constants-and-microstructural-characterization(55028a68-d8f2-4af2-9f90-8887baf1b53f).html