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

Autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY; v. N/A, p. 7-pg., 2023-09-07.

Resumo

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)

• Processo FAPESP: 20/15720-2 - Aplicação de glaze contendo prata em alta temperatura sobre zircônias de 3ª geração: efeitos na carga para falha em fadiga, translucidez e capacidade de mascaramento
• Beneficiário: Camila da Silva Rodrigues
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 19/21736-1 - Infiltrações de vidro com prata em zircônia odontológica para melhores propriedades mecânicas e antimicrobianas
• Beneficiário: Renata Marques de Melo Marinho
• Modalidade de apoio: Auxílio à Pesquisa - Regular