Loading...
Publication
Avaliação da resistência adesiva ao esmalte branqueado com sistemas adesivos universais após aplicação de um antioxidante
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 3.25 MB | Adobe PDF |
Authors
Abstract(s)
Objetivos: Avaliar in vitro o efeito da aplicação de um agente antioxidante, bem como a variação de sistemas adesivos, na resistência adesiva ao esmalte branqueado, ao imediato.
Materiais e Métodos: Trinta molares hígidos foram seccionados em metades, originando 60 amostras. Estas foram divididas em 6 grupos: Grupo Controlo A e B (GCA e GCB – dentes branqueados e restaurados passados 15 dias), Grupo 1 A e B (G1A e G1B – dentes branqueados e restaurados no imediato), e Grupo 2 A e B (G2A e G2B – dentes branqueados, aplicação do antioxidante ascorbato de sódio em gel a 10% durante 15 minutos antes da aplicação do sistema adesivo, e restaurados no imediato). Nos grupos “A” foi utilizado o sistema adesivo A - ScotchbondTM Universal (3M ESPE), enquanto nos grupos “B” foi utilizado o sistema adesivo B - ScotchbondTM Universal Plus (3M ESPE). Todas as amostras foram sujeitas a branqueamento com Whiteness PerfectTM 16% (FGM) durante 8h/dia ao longo de 7 dias, e restauradas com resina GrandioSOTM (VOCO GmbH). Decorridas 24 horas, as amostras foram novamente seccionadas formando
palitos com secção transversal de 1±0,2 mm2, segundo os eixos x e y, que foram testados em tração numa máquina de testes universais. A análise estatística realizou-se através do teste ANOVA e o teste Post-Hoc de Tukey HSD, a um nível de significância de 5% (SPSS26.0).
Resultados: Só se verificaram diferenças estatisticamente significativas após o período de espera de 15 dias (GCB vs. G1B, p<0,05). Não foram encontradas diferenças estatisticamente significativas entre os grupos comparáveis, no que respeita às variáveis sistema adesivo e antioxidante.
Conclusão: O tempo de espera influencia a resistência adesiva das restaurações em dentes branqueados, bem como a aplicação de um agente antioxidante.
Purpose: In vitro evaluation of an antioxidant agent´s application effect, as well as of the variation in adhesive systems on the bond strength values of bleached enamel, when immediately restored. Materials and Methods: Thirty sound molars were seccionated in half, to a total of 60 samples, and divided into 6 groups: Control Groups A and B (GCA and GCB, respectively, bleached and restored teeth after 15 days), Groups 1 A and B (G1A and G1B, respectively, bleached and immediately restored) and Groups 2 A and B (G2A and G2B, respectively, bleached teeth, submitted to 10% sodium ascorbate antioxidant treatment for 15 minutes and followed by a restoration). Groups A were treated with A - ScotchbondTM Universal (3M ESPE) adhesive system whereas groups B were treated with B - ScotchbondTM Universal Plus (3M ESPE) adhesive system. All samples were submitted to bleaching with the Whiteness PerfectTM 16% (FGM) kit for 8h/day during 7 days and restored with the GrandioSOTM (VOCO GmbH) resin composite. After 24h hours, samples were sectioned into sticks with 1±0,2 mm2 transversal section, according to the x and y axis, and tested in tension in a universal test machine. Statistical analysis was conducted using ANOVA followed by the Tukey HSD Post-Hoc test and p ≤ 0,05 was considered statistically significant (SPSS26.0). Results: Significant differences in μTBS values were only found after the waiting period of 15 days (GCB vs. G1B, p<0,05). There are no significant differences in μTBS values between the groups tested, when the variables adhesive system and antioxidant are being evaluated. Conclusions: The waiting period for restoration influences the bond strength of bleached teeth as well as the treatment with an antioxidant agent.
Purpose: In vitro evaluation of an antioxidant agent´s application effect, as well as of the variation in adhesive systems on the bond strength values of bleached enamel, when immediately restored. Materials and Methods: Thirty sound molars were seccionated in half, to a total of 60 samples, and divided into 6 groups: Control Groups A and B (GCA and GCB, respectively, bleached and restored teeth after 15 days), Groups 1 A and B (G1A and G1B, respectively, bleached and immediately restored) and Groups 2 A and B (G2A and G2B, respectively, bleached teeth, submitted to 10% sodium ascorbate antioxidant treatment for 15 minutes and followed by a restoration). Groups A were treated with A - ScotchbondTM Universal (3M ESPE) adhesive system whereas groups B were treated with B - ScotchbondTM Universal Plus (3M ESPE) adhesive system. All samples were submitted to bleaching with the Whiteness PerfectTM 16% (FGM) kit for 8h/day during 7 days and restored with the GrandioSOTM (VOCO GmbH) resin composite. After 24h hours, samples were sectioned into sticks with 1±0,2 mm2 transversal section, according to the x and y axis, and tested in tension in a universal test machine. Statistical analysis was conducted using ANOVA followed by the Tukey HSD Post-Hoc test and p ≤ 0,05 was considered statistically significant (SPSS26.0). Results: Significant differences in μTBS values were only found after the waiting period of 15 days (GCB vs. G1B, p<0,05). There are no significant differences in μTBS values between the groups tested, when the variables adhesive system and antioxidant are being evaluated. Conclusions: The waiting period for restoration influences the bond strength of bleached teeth as well as the treatment with an antioxidant agent.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
Branqueamento dentário Ascorbato de sódio Microtração Scotchbond™ Universal Plus