Silica infiltration on translucent zirconia restorations: Effects on the antagonist wear and survivability

Author(s)

Alves, Larissa Marcia Martins ; Rodrigues, Camila da Silva ; Ramos, Nathalia de Carvalho ; Buizastrow, Jeff ; Campos, Tiago Moreira Bastos ; Bottino, Marco Antonio ; Zhang, Yu ; de Melo, Renata Marques

• Document type: Journal article
• Source: Dental Materials; v. 38, n. 12, p. 12-pg., 2022-11-30.

Abstract

Objective: To assess potential antagonist wear and survival probability of silica-infiltrated zirconia compared to glass-graded, glazed, and polished zirconia.Methods: Table top restorations made of 3Y-TZP (3Y), 5Y-PSZ (5Y), and lithium disilicate (LD) were bonded onto epoxy resin preparations. Each zirconia was divided into five groups according to the surface treatment: polishing; glaze; polishing-glaze; glass infiltration; and silica infiltration. The LD restorations received a glaze layer. Specimens were subjected to sliding fatigue wear using a steatite antagonist (1.25 x106 cycles, 200 N). The presence of cracks, fractures, and/or debonding was checked every one/third of the total number of cycles was completed. Roughness, microstructural, Scanning electron microscopy, wear and residual stress analyses were conducted. Kaplan-Meier, Mantel-Cox (log-rank) and ANOVA tests were performed for statistical analyses.Results: The survival probability was different among the groups. Silica infiltration and polishing-glaze led to lower volume loss than glaze and glass-infiltration. Difference was observed for roughness among the zirconia and surface treatment, while lithium disilicate presented similar roughness compared to both glazed zirconia. Scanning electron micro-scopy revealed the removal of the surface treatment after sliding fatigue wear in all groups. Compressive stress was detected on 3Y surfaces, while tensile stress was observed on 5Y.Significance: 3Y and 5Y zirconia behaved similarly regarding antagonist wear, presenting higher antagonist wear than the glass ceramic. Silica-infiltrated and polished-glazed zir-conia produced lower antagonist volume loss than glazed and glass-infiltrated zirconia. Silica-infiltrated 3Y and lithium disilicate restorations were the only groups to show sur-vival probabilities lower than 85%.(c) 2022 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved. (AU)

• 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: 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