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Avaliação da microinfiltração marginal associada à alteração do tempo de secagem do fabricante de um sistema adesivo universal, com margens em esmalte e dentina
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Abstract(s)
Objetivo: Identificar e avaliar a microinfiltrã̧o marginal em restaurações classe II, associada à alteração do tempo de secagem recomendado pelo fabricante de um sistema adesivo universal.
Materiais e Métodos: Foram recolhidos vinte molares hígidos, sem cárie, fratura ou
restauração. Cada dente foi considerado como sendo dois espécimes, divididos ao centro do dente e cada metade foi aleatoriamente distribuída por quatro grupos distintos (n=40).
Cada grupo foi constituído por dez espécimes, (n=10), da seguinte forma: grupo 1, tempode secagem do adesivo 5 segundos, em esmalte; grupo 2, em dentina; grupo 3, com o tempo de secagem de 10 segundos, em esmalte; e grupo 4, na dentina. Em cada dente foram executadas duas cavidades classe II nas faces mesial e distal, com 2 mm em mesiodistal, 4 mm por vestíbulo-lingual e 6 mm de profundidade ocluso-gengival (4 mm da box oclusal e 2 mm da box gengival). Após a restauração de todos os espécimes, foram colocados em água destilada, em estufa a 37ºC, e posteriormente submetidos à termociclagem. De seguida, cada dente foi selado e imerso em fucsina básica a 0.5% durante 4 horas, e finalmente aplicado ao micrótomo para corte no sentido mesio-distal, usando como referência o centro da restauração, para a avaliação da infiltração do mesmo.
Resultados: Não existiram diferenças significativas nos valores de microinfiltração
marginal registados para cada tempo de secagem, e para cada substrato dentário. Na
maioria dos grupos não foi registada infiltração, pelo que a taxa de sucesso da restauração não depende do tempo de secagem, no sistema adesivo Prime&BondTM.
Conclusão: O presente estudo demonstra que o tempo de ar aplicado não influencia a
integridade marginal da restauração, quer em margens de esmalte quer de dentina, no
sistema adesivo universal utilizado.
Objective: Identify and evaluate the class II restorations marginal microleakage associated with the change of drying time recommended by the manufacturer of an universal adhesive system. Materials and methods: Twenty healthy molars were collected without cavities, fractures or restorations. Each tooth was considered to be two specimens divided into the center of the tooth and each half was randomly distributed into four distinct groups (n = 40). Each group consisted of ten specimens (n = 10), as follows: group 1, adhesive drying time 5 seconds in enamel; group 2 in dentin; group 3, with a drying time of 10 seconds in enamel; and group 4, in dentin. In each tooth, two class II cavities were performed on the mesial and distal surfaces, 2 mm mesio-distally, 4 mm per buccolingual and 6 mm deep in the gingival (4 mm in the occlusal box and 2 mm in the gingival box). After restoring all specimens, they were stored in incubator in distilled water at 37ºC and subsequently submitted to thermocycling. Then, each tooth was sealed and immersed in 0.5% basic fuchsin for 4 hours, and finally applied to the microtome for mesio-distal sectioning, using as a reference the restoration center, to assess its infiltration. Results: There weren’t significant differences in marginal microleakage values recorded for each drying time and dental substrate. In most groups, no infiltration was reported, that means the restoration success rate is not dependent of the drying time in the Prime&Bond ActiveTM adhesive system. Conclusion: This present study demonstrates that the applied air time does not influence the marginal integrity of the restoration, neither in enamel nor dentin margins, in the universal adhesive system used.
Objective: Identify and evaluate the class II restorations marginal microleakage associated with the change of drying time recommended by the manufacturer of an universal adhesive system. Materials and methods: Twenty healthy molars were collected without cavities, fractures or restorations. Each tooth was considered to be two specimens divided into the center of the tooth and each half was randomly distributed into four distinct groups (n = 40). Each group consisted of ten specimens (n = 10), as follows: group 1, adhesive drying time 5 seconds in enamel; group 2 in dentin; group 3, with a drying time of 10 seconds in enamel; and group 4, in dentin. In each tooth, two class II cavities were performed on the mesial and distal surfaces, 2 mm mesio-distally, 4 mm per buccolingual and 6 mm deep in the gingival (4 mm in the occlusal box and 2 mm in the gingival box). After restoring all specimens, they were stored in incubator in distilled water at 37ºC and subsequently submitted to thermocycling. Then, each tooth was sealed and immersed in 0.5% basic fuchsin for 4 hours, and finally applied to the microtome for mesio-distal sectioning, using as a reference the restoration center, to assess its infiltration. Results: There weren’t significant differences in marginal microleakage values recorded for each drying time and dental substrate. In most groups, no infiltration was reported, that means the restoration success rate is not dependent of the drying time in the Prime&Bond ActiveTM adhesive system. Conclusion: This present study demonstrates that the applied air time does not influence the marginal integrity of the restoration, neither in enamel nor dentin margins, in the universal adhesive system used.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
Microinfiltrã̧o marginal Restauração direta Sistema adesivo universal Tempo de secagem