ear behavior of silica-infiltrated monolithic zirconia: Effects on the mechanical properties and surface characterizatio

Autor(es)

Martins Alves, Larissa Marcia ^[1] ; Rodrigues, Camila da Silva ^[1] ; Ramos, Gabriela Freitas ^[1] ; Bastos Campos, Tiago Moreira ^[2] ; de Melo, Renata Marques ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, Inst Sci & Technol, Dept Dent Mat & Prosthodont, UNESP, Av Eng Francisco Jose Longo 777, BR-12245000 Sao Jose Dos Campos, SP - Brazil

^[2] Aeronaut Technol Inst ITA, Dept Phys, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 48, n. 5, p. 6649-6656, MAR 1 2022.
• Citações Web of Science: 0

Resumo

The objective of this study was to assess the wear behavior and its effects on the flexural strength of silica infiltrated zirconia compared to glaze and polishing finishing treatments. To do so, disc-shaped samples of a second-generation zirconia were prepared and divided into three groups: silica infiltration, glazing, or polishing. Half of the samples of each finishing were subjected to sliding wear testing using a steatite antagonist. The discs and antagonists had their volume loss measured. The wear-tested and the other half of samples were subjected to biaxial flexural strength testing and the following characterization analyses were also performed: roughness, hardness, X-ray diffraction, profilometry, and scanning electron microscopy (SEM). Data were evaluated with ANOVA and Weibull analyses. Glazing caused greater antagonist volume loss, followed by silica infiltration, and polishing. Silica-infiltrated zirconia surface was similarly worn to polished, which was lower than that for glazed zirconia. Polished zirconia presented the highest flexural strength. However,the strength decreased and became similar in all worn groups. Silica infiltration showed slightly lower characteristic strength after sliding wear. The highest roughness and hardness values were observed on glazed zirconia. These values decreased after wear testing and became similar to the other groups. SEM evidenced an irregular surface for glazing. No phase transformation occurred after sliding wear. Despite producing some volume loss on zirconia and antagonist surfaces, silica infiltration is a promising alternative for finishing monolithic restorations. Moreover, the damage caused by sliding wear leads to decreasing the strength of zirconia regardless of the surface finishing. (AU)

• Processo FAPESP: 18/22627-9 - Fadiga deslizante em restaurações de zircônia translúcida com vários acabamentos de superfície: avaliação da probabilidade de falha e desgaste
• Beneficiário: Larissa Marcia Martins Alves
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 17/20633-9 - Fadiga deslizante em restaurações finas de zircônia translúcida com vários acabamentos de superfície: avaliação da sobrevivência e desgaste
• Beneficiário: Larissa Marcia Martins Alves
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/07920-6 - Zircônia infiltrada por sílica pelo método sol-gel para aplicações odontológicas
• Beneficiário: Renata Marques de Melo Marinho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 15/11405-7 - Resistência à flexão biaxial, rugosidade e dureza de zircônias monolíticas: efeito da infiltração pelo método sol-gel e da simulação do desgaste fisiológico
• Beneficiário: Larissa Marcia Martins Alves
• Modalidade de apoio: Bolsas no Brasil - Mestrado