Análise da resistência de união do vidro soda lime ao cimento resinoso
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2024-03-07
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Universidade Estadual Paulista (Unesp)
Resumo
Objetivo: Avaliar a resistência de união do cimento resinoso aos vidros soda lime com e sem prata. Materiais e Métodos: 90 amostras de zircônia 5Y-PSZ de dimensões dimensões finais de 4,0 x 4,0 x 1,8 mm foram sinterizadas e distribuídas em (n=15): C(zircônia + jateamento com partículas de óxido de alumínio- AlO4), SL(zircônia + vidro soda lime), SLAg(zircônia + vidro soda lime com prata), e envelhecidos (e): Ce, SLe e SLAge. O pó de vidro com e sem prata foram diluídos em Propilenoglicol, aplicados sobre os espécimes, e sinterizados, enquanto C e Ce foram jateados. Com exceção dos grupos C e Ce, todas as amostras foram condicionadas com ácido fluorídrico 10% por 60 s e, o teste de rugosidade foi realizado. O silano foi aplicado por 60 s sobre as superfícies tratadas e cilindros de cimento resinoso de dimensões Ø1,8 x 2mm de altura foram confeccionados. Os grupos envelhecidos foram armazenados em água destilada por 6 meses. O teste de cisalhamento foi realizado e os tipos de falhas foram avaliados através de estereomicroscópio. Os valores de rugosidade e teste de cisalhamento (MPa) foram submetidos à ANOVA 1-fator e 2-fatores, respectivamente (α= 0,05). Resultados: O grupo SL apresentou maior rugosidade superficial. Entretanto, SLAg apresentou maior média no teste de cisalhamento em curto prazo (23,15 MPa), SL (19,64 MPa) e C (17,22 MPa) e a longo prazo, o grupo SLAge apresentou (10,70 MPa), SLe (8,35 MPa) e Ce (6,85 MPa) (p<0,05). As falhas foram de origem adesivas da zircônia para C e Ce e adesivas entre cimento e vidro para os demais grupos. Conclusão: Após o envelhecimento, o vidro soda lime com prata manteve a resistência de união ao cimento resinoso, quando comparado ao jateamento da zircônia 5Y-PSZ sem envelhecimento
Objective: To evaluate the bond strength of resin cement to soda lime glass with and without silver. Materials and Methods: 90 samples of 5Y-PSZ zirconia with final dimensions of 4.0 x 4.0 x 1.8 mm were sintered and distributed into (n=15): C (zirconia + alumina oxide particle blasting - AlO4), SL (zirconia + soda lime glass), (zirconia + soda lime glass with silver), and aged (e): Ce, SLe, and SLAge. Glass powder with and without silver was diluted in Propylene Glycol, applied to the specimens, and sintered, while C and Ce were blasted. Except for groups C and Ce, all samples were conditioned with 10% hydrofluoric acid for 60 s, and roughness testing was performed. Silane was applied for 60 s on treated surfaces, and resin cement cylinders (Ø1,8 x 2mm) were fabricated. Aged groups were stored in distilled water for 6 months. Shear bond strength testing was conducted, and failure types were assessed using a stereomicroscope. Roughness values and shear bond strength (MPa) were subjected to ANOVA one-way and two-way, respectively (α= 0.05). Results: The SL group showed higher surface roughness. However, SLAg exhibited the highest mean shear bond strength: (23.15 MPa), SL (19.64 MPa), and C (17.22 MPa) and in the long term, the SLAge group presented (10.7 MPa), SLe (8.35 MPa) and Ce (6.34 MPa) (p<0.05). Failures were adhesive between zirconia and C or Ce and adhesive between cement and glass for the other groups. Conclusion: After aging, soda lime glass with silver maintained bond strength to resin cement when compared to blasting of 5Y-PSZ zirconia without aging.
Objective: To evaluate the bond strength of resin cement to soda lime glass with and without silver. Materials and Methods: 90 samples of 5Y-PSZ zirconia with final dimensions of 4.0 x 4.0 x 1.8 mm were sintered and distributed into (n=15): C (zirconia + alumina oxide particle blasting - AlO4), SL (zirconia + soda lime glass), (zirconia + soda lime glass with silver), and aged (e): Ce, SLe, and SLAge. Glass powder with and without silver was diluted in Propylene Glycol, applied to the specimens, and sintered, while C and Ce were blasted. Except for groups C and Ce, all samples were conditioned with 10% hydrofluoric acid for 60 s, and roughness testing was performed. Silane was applied for 60 s on treated surfaces, and resin cement cylinders (Ø1,8 x 2mm) were fabricated. Aged groups were stored in distilled water for 6 months. Shear bond strength testing was conducted, and failure types were assessed using a stereomicroscope. Roughness values and shear bond strength (MPa) were subjected to ANOVA one-way and two-way, respectively (α= 0.05). Results: The SL group showed higher surface roughness. However, SLAg exhibited the highest mean shear bond strength: (23.15 MPa), SL (19.64 MPa), and C (17.22 MPa) and in the long term, the SLAge group presented (10.7 MPa), SLe (8.35 MPa) and Ce (6.34 MPa) (p<0.05). Failures were adhesive between zirconia and C or Ce and adhesive between cement and glass for the other groups. Conclusion: After aging, soda lime glass with silver maintained bond strength to resin cement when compared to blasting of 5Y-PSZ zirconia without aging.
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Palavras-chave
Cimentos dentários, Materiais dentários, Testes mecânicos, Vidro, Dental cements, Dental materials, Mechanical tests, Glass
Como citar
Nogueira VF. Análise da Resistência de união do vidro soda lime ao cimento resinoso.[trabalho de Conclusão de curso]. São José dos Campos (SP): Universidade Estadual Paulista (Unesp), Instituto de Ciência e Tecnologia; 2024.