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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Martins Alves, Larissa Marcia [1] ; Rodrigues, Camila da Silva [1] ; Ramos, Gabriela Freitas [1] ; Bastos Campos, Tiago Moreira [2] ; de Melo, Renata Marques [1]
Total Authors: 5
Affiliation:
[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
Total Affiliations: 2
Document type: Journal article
Source: CERAMICS INTERNATIONAL; v. 48, n. 5, p. 6649-6656, MAR 1 2022.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 18/22627-9 - Sliding contact fatigue in translucent zirconia restorations after several surface finishes: survival and wear analyse
Grantee:Larissa Marcia Martins Alves
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 17/20633-9 - Sliding contact fatigue in translucent zirconia restorations after several surface finishes: survival and wear analyses
Grantee:Larissa Marcia Martins Alves
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 16/07920-6 - Silica infiltrated zirconia obtained through the sol-gel method for dental applications
Grantee:Renata Marques de Melo Marinho
Support Opportunities: Regular Research Grants
FAPESP's process: 15/11405-7 - Biaxial flexural strenght, roughness and hardness of monolithic zirconias: effect of silica infiltration by sol-gel method and physiological wear simulation
Grantee:Larissa Marcia Martins Alves
Support Opportunities: Scholarships in Brazil - Master