Resistance to physiological wear of the characterization layer of hybrid ceramic

Author(s)

Manassés Tercio Vieira Grangeiro

• Document type: Master's Dissertation
• Press: São José dos Campos. 2020-03-09.
• Institution: Universidade Estadual Paulista (Unesp). Instituto de Ciência e Tecnologia. São José dos Campos
• Defense date: 2020-02-03
• Advisor: Marco Antonio Bottino

Abstract

This study evaluated the resistance to physiological wear of the characterization layer applied over hybrid ceramic with different surface treatments, with different antagonists. One hundred and sixty discs were confectioned (12 mm of diameter, 1.2 mm of thickness) of hybrid ceramic with polymer (Vita Enamic, Vita Zhanfabrick, Bad Säckingen, Germany) and were polished with silicon carbide paper # 1200 and randomly divided into experimental groups (n = 10), according to the surface treatment previously to the characterization and finishing of the ceramic either with a glaze layer or not (P: samples polished without characterization; PG: polished samples with glaze finishing; C: conventional pigmentation; CG: conventional pigmentation finishing with glaze; J: sandblasting; JG: sandblasting, finishing with glaze; S: use of self-etching silane; SG: use of self-etching silane, finishing with glaze). Half of the specimens were submitted to simulation of physiological wear with steatite applicators, meanwhile for the other half, applicators of hybrid ceramic were used. With the aid of a contact perfilometer, roughness parameters were analyzed. The mean roughness Ra and spacing roughness RSm were statistically analyzed by 3-way ANOVA (surface treatment x glaze presence x antagonist), followed by Tukey (a= 5%). There was influence of interaction of the three factors in mean roughness (Ra) of hybrid ceramic (p=0.000) and in the interaction of two factors (surface treatment x glaze presence) in the spacing roughness RSm of the hybrid ceramic (p=0.011). Hybrid ceramic require a surface treatment for extrinsic characterization. Glaze application after characterization decreases surface roughness and wear potential of the antagonist. (AU)

• FAPESP's process: 18/04726-0 - Resistance to the physiological wear of the characterization layer of hybrid ceramic
• Grantee: Manassés Tercio Vieira Grangeiro
• Support Opportunities: Scholarships in Brazil - Master