Silica deposition on zirconia via room-temperature atomic layer deposition (RT-ALD): Effect on bond strength to veneering ceramic

Autor(es)

Bitencourt, Sandro Basso ; Hatton, Benjamin D. ; Bastos-Bitencourt, Natalia Almeida ; dos Santos, Daniela Micheline ; Pesqueira, Aldieris Alves ; De Souza, Grace Mendonca

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS; v. 129, p. 7-pg., 2022-03-05.

Resumo

Purpose: To develop and to characterize a hybrid interface between yttria-stabilized zirconia (Y-TZP) transformed layer and silica-based nanofilm to enable a better bonding between Y-TZP and a veneering ceramic. Material and methods: Sixty-six fully-sintered rectangular Y-TZP specimens were distributed into 6 groups, ac-cording to the surface treatment applied: C (control): no treatment; Al: 27 mu m-alumina particle abrasion; Ht: hydrothermal treatment in autoclave for 15h; Si20: 20 cycles of silica deposition using room-temperature atomic layer deposition (RT-ALD); Si40: 40 cycles of RT-ALD; Ht thorn Si40: hydrothermal treatment followed by 40 cycles of RT-ALD. RT-ALD was performed by the sequential exposure of specimens to vapor of tetramethoxysilane orthosilicate (TMOS) and ammonium hydroxide (NH4OH). Y-TZP surface wettability and shear bond strength (SBS) between Y-TZP and the veneering ceramic were analyzed for all groups after surface treatments. One-way ANOVA and Tukey's HSD test were used for data analysis (p <= 0.05). Results: The highest contact angle was observed for the control group (64.46 +/- 6.09 0), while the lowest values (p < 0.001) were presented after Si20 (29.85 +/- 4.23 0) and Si40 (30.37 +/- 5.51 0) treatments. Hydrothermal treatment (49.3 +/- 2.69 0) and alumina abrasion (45.84 +/- 4.12 0) resulted in intermediate contact angle values. The highest SBS values were observed for Al (16.74 +/- 1.68 MPa) and Ht (15.27 +/- 2.11 MPa) groups (p < 0.018). Groups Si20 (9.66 +/- 1.22 MPa), Si40 (9.33 +/- 2.11 MPa), Ht + Si40 (9.37 +/- 1.02 MPa) and C (12.54 +/- 2.64 MPa) all resulted in similar SBS results (p > 0.998). Conclusion: The experimental treatments proposed enhanced surface wettability, but shear bond strength be-tween Y-TZP and veneering ceramic was not improved. Alumina particle-abrasion improved SBS values while a decrease in wettability was observed. (AU)

• Processo FAPESP: 17/13933-6 - Potencial mecânico da associação de diferentes tratamentos com a deposição de filmes por vapor químico melhorado por plasma na superfície da zircônia
• Beneficiário: Sandro Basso Bitencourt
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 15/11412-3 - Análise da interface zircônia/cerâmica de cobertura após diferentes tratamentos de superfície e envelhecimento, por meio da caracterização estrutural e resistência de união
• Beneficiário: Aldiéris Alves Pesqueira
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/24984-3 - Deposição de sílica na zircônia via Deposição de Camada Atômica em Temperatura Ambiente (RT-ALD): efeito na resistência de união com cerâmica de cobertura
• Beneficiário: Sandro Basso Bitencourt
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado