INFLUENCE OF CORROSIVE-ABRASIVE CHALLENGE AND GLAZE PROTOCOL ON THE ROUGHNESS AND MICROHARDNESS OF MONOLITHIC CERAMICS

• Grant number: 25/23517-6
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: January 01, 2026
• End date: December 31, 2026
• Field of knowledge: Health Sciences - Dentistry - Dental Clinics
• Principal Investigator: Edson Alves de Campos
• Grantee: Pedro Pesoti Ribeiro
• Host Institution: Faculdade de Odontologia (FOAr). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil

Abstract

Digital dentistry, through CAD/CAM systems, has enabled remarkable progress in the fabrication of ceramic restorations, providing superior precision and esthetics. Nevertheless, continuous exposure to the oral environment - encompassing both chemical and mechanical challenges - may compromise the long-term performance of these restorations.This in vitro study aims to evaluate the effects of corrosive-abrasive challenges and different glaze protocols on the surface roughness and microhardness of monolithic ceramics. Four types of ceramics will be investigated (IPS E.max CAD, CEREC Tessera, Celtra Duo, and VitaBlocs Suprinity), divided into groups according to surface treatment. The specimens will be subjected to immersion in citric acid and simulated toothbrushing, followed by assessments of surface roughness and microhardness.Surface properties will be analyzed before and after the challenges, allowing comparisons among the tested protocols. Vickers microhardness and Ra surface roughness will be employed as quantitative parameters. The use of two glaze firings is proposed as a potential strategy to enhance the clinical performance and mechanical resistance of the restorations, thereby promoting their long-term integrity.This investigation contributes to the optimization of clinical protocols for ceramic finishing, offering evidence-based insights into the durability and esthetic stability of CAD/CAM ceramic prostheses exposed to the adverse conditions of the oral environment. (AU)