Brushing Simulation with a New Gel Formulation of Silver Vanadate (b-AgVO3): Evaluation of the Physical and Mechanical Properties of Ceramic and Composite Resin

• Grant number: 24/18674-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: May 01, 2025
• End date: December 31, 2025
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Andréa Cândido dos Reis
• Grantee: Diego Morita Gomes da Costa
• Host Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

The ceramic and resin materials used for direct and indirect restorations have the appropriate aesthetic and mechanical characteristics, including surface roughness and gloss. However, these materials can be affected by the brushing process. The developtment of a sanitizing gel containing silver vanadate (¿-AgVO¿) may be an alternative method for minimizing alterations to the material surface, due to the nanometric scale of the abrasive particles. The objective of this study is to evaluate the effects of brushing with a ¿-AgVO3 sanitizing gel on the physical and mechanical properties of zirconia and composite resin. The specimens will be synthesized in zirconia and composite resin, followed by the synthesis of ¿-AgVO3 gel in concentrations previously established by the research group (0,06% and 0,12%). The gloss, color, roughness, and hardness properties of the materials will be analyzed before and after a brushing protocol using distilled water, conventional dentifrice, and ¿-AgVO3 gel. The brushing process will be conducted on a machine designed for this purpose and will simulate a two-year brushing cycle. The gloss will be quantified with a glossmeter (Micro-Gloss 45°, BYK Gardner, Geretsried, Germany) at three distinct points for each sample. Color will be determined using a portable spectrophotometer (Multiskan GO, Thermo Scientific, Thermo Scientific Multiskan Spectrum, MA, USA). Three measurements will be taken per sample for surface roughness using a 3D laser confocal microscope (LEXT 4000; Olympus, Hamburg, Germany) without touching the samples. Microhardness will also be measured three times per sample using a microhardness meter (Shimadzu HMV-2000, Japan). The data obtained will be subjected to statistical analysis according to the distribution of the data with a significance level of 5%.