Interface adhesion on layered zirconia: Effects of the veneering ceramic material and veneering technique

Author(s)

Nogueira, Vanessa de Fatima ; Rodrigues, Camila da Silva ; Grangeiro, Manasses Tercio Vieira ; Contreras, Lisseth Patricia Claudio ; Marinho, Renata Marques de Melo ; Bottino, Marco Antonio

• Document type: Journal article
• Source: JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY; v. N/A, p. 7-pg., 2023-09-07.

Abstract

PurposeTo evaluate the effect of different veneering ceramics and veneering techniques on the bond strength to zirconia.Materials and Methods3Y-TZP zirconia blocks were sliced into 60 slabs, polished, and sintered. Each slab received one ceramic cylinder (o = 3.4 mm, 5 mm-high), according to the veneering ceramic type (feldspathic-FEL or lithium disilicate-based-LD) and the veneering technique (file-splitting with resin-based luting agent-RC, file-splitting with fusion ceramic-FC, or heat-pressing-HT), which resulted in six groups: FEL-RC, FEL-FC, FEL-HT, LD-RC, LD-FC, LD-HT. After preparation, the samples were immersed in distilled water for 24 h before the shear bond strength (SBS) test. The failure modes were classified as adhesive, predominantly adhesive, or cohesive. Representative failure mode images were taken in a Scanning Electron Microscope. The SBS data were analyzed by two-way ANOVA and Tukey's test.ResultsBoth type of veneering ceramic and technique affected the bond strength. FC led to the highest SBS values. RC and HP provided similar results when compared within each veneering ceramic. Lithium disilicate achieved lower bond strength than feldspathic ceramic when the heat-pressing technique was applied. The most frequent failure modes were predominantly adhesive and adhesive for FEL and LD, respectively.ConclusionFile-splitting with fusion ceramic provided the highest adhesion to zirconia when feldspathic or lithium disilicate-based ceramics were used. The heat-pressing technique for veneering with lithium disilicate significantly decreased the bond strength when compared to the feldspathic ceramic. (AU)

• FAPESP's process: 20/15720-2 - Application of silver-containing glaze at high temperature on third-generation zirconias: effects on the fatigue failure load, translucency, and masking ability
• Grantee: Camila da Silva Rodrigues
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 19/21736-1 - Title: silver containing glass infiltrations in dental zirconia for improved mechanical and antimicrobial properties
• Grantee: Renata Marques de Melo Marinho
• Support Opportunities: Regular Research Grants