Publicação: Zirconia gradation and thermal expansion compatibility between infiltration glass and antimicrobial glass
Carregando...
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Tipo
Artigo
Direito de acesso
Resumo
This study evaluated an infiltration glass over zirconia in order to form a graded layer with thermal expansion coefficient compatibility and antimicrobial capacity. 210 discs of 3Y-TZP were polished and divided into groups: YZ sintered (Sintered), YZ glazed (Glaze), YZ + Ag 5% (Ag 5%), YZ + Ag 4% (Ag 4%), YZ glass infiltrated (INF.), YZ glass infiltrated + Ag 5% (INF. + Ag 5%) and YZ glass infiltrated + Ag 4% (INF. + Ag 4%). Analyzes of biaxial flexural strength, X-ray diffraction (XRD), EDS, translucency, scanning electron microscopy (SEM) and fractographic were performed. The biofilm was quantified by counting the colony forming units (CFU/mL) of S. mutans. Strength values (MPa), translucency and CFU data were analyzed by one-way ANOVA and Tukey's test (α = 0.05). Weibull analysis was performed to calculate the material's modulus (m) and characteristic strength (95% CI). Infiltrated zirconia glass (INF.: 1149.7; INF. + Ag 4%: 928.2; INF. + Ag 5%: 791.5), sintered (819.0) or glazed (790.8) showed higher flexural strength (MPa) than silver-doped soda-lime glass zirconia without infiltration glass (Ag 5%: 612.1; Ag 4%: 519.2). Diffractograms showed combeite crystals in INF. + Ag 4%/5%. EDS analysis of Ag 5% group showed the higher quantity of silver when compared to INF. + Ag 5% group. Silver-doped soda-lime glass did not affect the translucency, while infiltration glass decreased the values. SEM showed irregularities on the surface of the silver-doped soda-lime glass groups and a smooth surface on the glass and glaze groups. Fracture origin of all groups was in the glaze layer and silver-doped soda-lime glass, while it was inside the zirconia in the INF. group. Lowest colony growth was observed in the Ag 5%. Glass-infiltrated zirconia showed greater strength, while Ag 5% presented greater antimicrobial capacity. The application of silver-doped soda-lime glass did not influence zirconia translucency, while glass infiltration decreased it.
Descrição
Palavras-chave
Mechanical properties, Silver, Soda-lime glass, Zirconia
Idioma
Inglês
Como citar
Ceramics International, v. 48, n. 14, p. 19746-19756, 2022.
