Avaliação das propriedades de um sistema adesivo modificado por partículas de vidro bioativas
Carregando...
Arquivos
Data
2020-02-04
Autores
Matuda, Amanda Guedes Nogueira
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
O objetivo desse estudo foi avaliar as propriedades de um sistema adesivo modificado com a incorporação de partículas de vidro bioativas (SCHOTT Bioactive Glass) em duas diferentes concentrações (0,5 e 1%). Foram avaliados a resistência de união da interface adesiva, o grau de conversão e a atividade antibacteriana, além da análise por meio do Estereomicroscópio e Microscópio Eletrônico de Varredura (MEV). Os adesivos foram divididos em três grupos: ASB - Adesivo Single Bond 2 (3M-ESPE) sem a incorporação de partículas bioativas, ASB0,5 – Adesivo Single Bond 2 com a incorporação de partículas bioativas na concentração de 0,5% e ASB1 – Adesivo Single Bond 2 com a incorporação de partículas bioativas na concentração de 1%. Para o teste de resistência de união foram utilizados 30 molares humanos hígidos (n=10) que posteriormente foram observados em Estereomicroscópio para análise do padrão da fratura. O grau de conversão foi feito no FTIR, onde foram feitas três leituras das gotas do adesivo dos diferentes grupos. A atividade antibacteriana foi feita através dos testes de difusão em ágar e contagem da unidade formadora de colônia (UFC), onde foram utilizados discos de adesivos polimerizados dos diferentes grupos. Os testes antibacterianos foram repetidos por três vezes. Os dados foram analisados estatisticamente quanto à sua normalidade. Como estes apresentaram distribuição normal, realizou-se o teste de análise de variância (ANOVA) paramétrica um fator (sistema adesivo) e o teste de Tukey, sendo adotado o nível de significância de 5% para a tomada de decisões. De acordo com os resultados obtidos na microtração (MPa±Dp) , a maior média foi observada no grupo ASB0,5 49,04±4,72A, seguida do grupo ASB 41,19±2,34B e a menor média foi observada no grupo ASB1 27,15±2,36C. No grau de conversão a maior média foi observada no grupo ASB 77,75±2,97A, seguido do grupo ASB0,5 63,18 ± 20,03A e grupo ASB1 58,35 ± 14,95A. Na atividade antibacteriana não houve diferença na formação de áreas de inibição, entretanto na unidade formadora de colônia o grupo ASB0,5 0,36±0,02B apresentou menor média em relação aos grupos ASB1 0,53±0,06A e ASB 0,51±0,01A. Foi concluído que a incorporação de partículas de vidro bioativas na concentração de 0,5% no sistema adesivo, aumentou a resistência de união da interface adesiva e apresentou atividade antibacteriana (UFC), no entanto, nas diferentes concentrações, não influenciou no grau de conversão do adesivo.
The objective of this study was to evaluate the properties of a modified adhesive system with the incorporation of bioactive glass particles (SCHOTT Bioactive Glass) in two different concentrations (0.5 and 1%). The bond strength of the adhesive interface, the degree of conversion and antibacterial activity were evaluated, in addition to analysis using the Stereomicroscope and Scanning Electron Microscope (SEM). The adhesives were divided into three groups: ASB - Single Bond 2 Adhesive (3M-ESPE) without the incorporation of bioactive particles, ASB0.5 - Single Bond 2 Adhesive with the incorporation of bioactive particles at a concentration of 0.5% and ASB1 - Single Bond 2 adhesive with the incorporation of bioactive particles at a concentration of 1%. For the microtensile bond strength test, 30 healthy human molars (n = 10) were used, which were subsequently observed in a stereomicroscope to analyze the fracture pattern. The degree of conversion was made in the FTIR, where three readings of the drops of the adhesive of the different groups were made. The antibacterial activity was performed through the agar diffusion tests and colony forming unit (CFU) counting, where polymerized adhesive discs from different groups were used. The antibacterial tests were repeated three times. The data were analyzed statistically for normality. As these showed normal distribution, the parametric one-way analysis of variance (ANOVA) test (adhesive system) and the Tukey test were performed, with a significance level of 5% for decision making. According to the results obtained in microtensile (MPa ± Dp), the highest average was observed in the ASB0.5 group 49.04 ± 4.72A, followed by the ASB group 41.19 ± 2.34B and the lowest average was observed in the ASB1 group 27.15 ± 2.36C. In the degree of conversion, the highest average was observed in the ASB group 77.75 ± 2.97A, followed by the ASB0.5 group 63.18 ± 20.03A and ASB1 group 58.35 ± 14.95A. In the antibacterial activity there was no difference in the formation of areas of inhibition, however in the colony-forming unit the ASB0.5 group 0.36 ± 0.02B presented a lower average in relation to the ASB1 groups 0.53 ± 0.06A and ASB 0.51 ± 0.01A. It was concluded that the incorporation of bioactive glass particles at a concentration of 0.5% in the adhesive system, increased the bond strength of the adhesive interface and showed antibacterial activity (CFU), however, in different concentrations, did not influence the degree of conversion of the adhesive.
The objective of this study was to evaluate the properties of a modified adhesive system with the incorporation of bioactive glass particles (SCHOTT Bioactive Glass) in two different concentrations (0.5 and 1%). The bond strength of the adhesive interface, the degree of conversion and antibacterial activity were evaluated, in addition to analysis using the Stereomicroscope and Scanning Electron Microscope (SEM). The adhesives were divided into three groups: ASB - Single Bond 2 Adhesive (3M-ESPE) without the incorporation of bioactive particles, ASB0.5 - Single Bond 2 Adhesive with the incorporation of bioactive particles at a concentration of 0.5% and ASB1 - Single Bond 2 adhesive with the incorporation of bioactive particles at a concentration of 1%. For the microtensile bond strength test, 30 healthy human molars (n = 10) were used, which were subsequently observed in a stereomicroscope to analyze the fracture pattern. The degree of conversion was made in the FTIR, where three readings of the drops of the adhesive of the different groups were made. The antibacterial activity was performed through the agar diffusion tests and colony forming unit (CFU) counting, where polymerized adhesive discs from different groups were used. The antibacterial tests were repeated three times. The data were analyzed statistically for normality. As these showed normal distribution, the parametric one-way analysis of variance (ANOVA) test (adhesive system) and the Tukey test were performed, with a significance level of 5% for decision making. According to the results obtained in microtensile (MPa ± Dp), the highest average was observed in the ASB0.5 group 49.04 ± 4.72A, followed by the ASB group 41.19 ± 2.34B and the lowest average was observed in the ASB1 group 27.15 ± 2.36C. In the degree of conversion, the highest average was observed in the ASB group 77.75 ± 2.97A, followed by the ASB0.5 group 63.18 ± 20.03A and ASB1 group 58.35 ± 14.95A. In the antibacterial activity there was no difference in the formation of areas of inhibition, however in the colony-forming unit the ASB0.5 group 0.36 ± 0.02B presented a lower average in relation to the ASB1 groups 0.53 ± 0.06A and ASB 0.51 ± 0.01A. It was concluded that the incorporation of bioactive glass particles at a concentration of 0.5% in the adhesive system, increased the bond strength of the adhesive interface and showed antibacterial activity (CFU), however, in different concentrations, did not influence the degree of conversion of the adhesive.
Descrição
Palavras-chave
Adesivos dentinários, Biovidro, Resistência à tração, Força de união, Dentin-bonding agents, Bioglass, Tensile strength, Bond strength