Effect of glass applications on surface properties and biofilm formation on monolithic zirconia

• Grant number: 19/11724-6
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: July 01, 2019
• End date: August 31, 2020
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Renata Marques de Melo Marinho
• Grantee: Clarice Ferreira Sabino
• Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil

Abstract

Zirconia is a material widely used in dentistry due to high fracture toughness, biocompatibility and aesthetics. This material is exposed to the oral environment, which makes it highly prone to superficial adhesion of biofilm and microbial proliferation. Silver has proven antimicrobial activity and an association with zirconia may confer some antimicrobial properties to this ceramic in addition to reducing the superficial adhesion of biofilm. Thus, the objective of this study will be to analyze the surface topography and quantify the adhesion of biofilms formed on the surface of the YZ infiltrated by different glasses. 45 HT zirconia samples (VITA Zahnfabrik, Germany) will be used, divided into 4 groups: YZ polished; YZ glazed; YZ with glass; YZ with glass + silver. The parameters that will be submitted to tests of surface roughness (n = 15), profilometry (n = 2) and count of colony forming units (CFU) (n = 8). The expected results will show if Vita HT zirconia infiltrated with silver glass presents less biofilm adhesion than the glazed and polished surfaces, in addition presenting antimicrobial activity against specific microorganisms