Alvaro Della Bona1, Pedro H Corazza2, Yu Zhang3. 1. Post-graduation Program in Dentistry, Dental School, University of Passo Fundo, Passo Fundo, RS, Brazil. Electronic address: dbona@upf.br. 2. Department of Dental Materials and Prosthodontics, Institute of Science and Technology of São José dos Campos, São Paulo State University (UNESP), São José dos Campos, SP, Brazil. 3. Department of Biomaterials & Biomimetics, College of Dentistry, New York University, New York, NY, USA.
Abstract
OBJECTIVES: To characterize the microstructure and determine some mechanical properties of a polymer-infiltrated ceramic-network (PICN) material (Vita Enamic, Vita Zahnfabrik) available for CAD-CAM systems. METHODS: Specimens were fabricated to perform quantitative and qualitative analyses of the material's microstructure and to determine the fracture toughness (KIc), density (ρ), Poisson's ratio (ν) and Young's modulus (E). KIc was determined using V-notched specimens and the short beam toughness method, where bar-shaped specimens were notched and 3-point loaded to fracture. ρ was calculated using Archimedes principle, and ν and E were measured using an ultrasonic thickness gauge with a combination of a pulse generator and an oscilloscope. RESULTS: Microstructural analyses showed a ceramic- and a polymer-based interpenetrating network. Mean and standard deviation values for the properties evaluated were: KIc=1.09±0.05MPam(1/2), ρ=2.09±0.01g/cm(3), ν=0.23±0.002 and E=37.95±0.34GPa. SIGNIFICANCE: The PICN material showed mechanical properties between porcelains and resin-based composites, reflecting its microstructural components.
OBJECTIVES: To characterize the microstructure and determine some mechanical properties of a polymer-infiltrated ceramic-network (PICN) material (Vita Enamic, Vita Zahnfabrik) available for CAD-CAM systems. METHODS: Specimens were fabricated to perform quantitative and qualitative analyses of the material's microstructure and to determine the fracture toughness (KIc), density (ρ), Poisson's ratio (ν) and Young's modulus (E). KIc was determined using V-notched specimens and the short beam toughness method, where bar-shaped specimens were notched and 3-point loaded to fracture. ρ was calculated using Archimedes principle, and ν and E were measured using an ultrasonic thickness gauge with a combination of a pulse generator and an oscilloscope. RESULTS: Microstructural analyses showed a ceramic- and a polymer-based interpenetrating network. Mean and standard deviation values for the properties evaluated were: KIc=1.09±0.05MPam(1/2), ρ=2.09±0.01g/cm(3), ν=0.23±0.002 and E=37.95±0.34GPa. SIGNIFICANCE: The PICN material showed mechanical properties between porcelains and resin-based composites, reflecting its microstructural components.
Authors: Alvaro Della Bona; Tiago A Donassollo; Flávio F Demarco; Allyson A Barrett; John J Mecholsky Journal: Dent Mater Date: 2006-11-16 Impact factor: 5.304
Authors: Mathilde Tassin; Eric Bonte; Ludwig S Loison-Robert; Ali Nassif; Tsouria Berbar; Stéphane Le Goff; Ariane Berdal; Michael Sadoun; Benjamin P J Fournier Journal: PLoS One Date: 2016-05-19 Impact factor: 3.240