Evaluation of wear for fatigue layer of hybrid ceramic

• Grant number: 18/13370-4
• Support type: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): September 01, 2018
• Effective date (End): August 31, 2019
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Marco Antonio Bottino
• Grantee: Gabriel Cirone Lopes
• Home Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil

Abstract

This study aims to evaluate the resistance to physiological wear of the characterization layer applied on hybrid ceramics with different surface treatments, as a function of the zirconia antagonist. One hundred and sixty (14 mm diameter, 1.2 mm thick) discs of hybrid polymer ceramics (Vita Enamic, Vita Zhanfabrick, Bad Säckingen, Germany) will be made, which will be polished with silicon carbide sticks up to # 600 and randomly (P: polished specimens without characterization; PG: polished specimens, glaze finish; C: conventional pigmentation: CG: conventional pigmentation, glaze finish; J: sandblasting; JG: sandblasting, glaze finish; S: self-etching silane, SG: self-etching silane, glaze finish). The specimens will be submitted to simulation of physiological wear with zirconia. With the aid of contact profilometer, parameters of height, spacing and hybrid roughness will be analyzed. The samples will then be tested for biaxial flexural strength (ISO 6872:2008). The fracture mode will be evaluated using a stereomicroscope. The values of resistance to bending and roughness will be analyzed statistically. The data will be discussed in front of the relevant literature.