J Clin Exp Dent. 2017;9(3): Effect of thermocycling and polymerization techniques

Journal section: Operative Dentistry and Endodontics
Publication Types: Research

Effect of thermocycling and varying polymerization techniques on the restorative interface of class V cavities restored with different composite resin systems.

Jefferson-Ricardo Pereira 1 , Lindomar-Corrêa Júnior 2 , Marcus-Vinicius-Reis Só 3 , Newton-Fahl Júnior 4

1 DDS, MSc, PhD, Department of Prosthodontics, University of Southern Santa Catarina, Tubarão, Santa Catarina, Brazil
2 DDS, Department of Prosthodontics, University of Southern Santa Catarina, Tubarão, Santa Catarina, Brazil
3 DDS, MSc, PhD, Department of Conservative Dentistry, Rio Grande do Sul Federal University, Porto Alegre, RS, Brazil
4 DDS, MSc, Newton Fahl Center, Curitiba, PR, Brazil


University of Southern Santa Catarina – Tubarão/SC – Brazil Address: Rua Recife, 200 – Apto 601 – Bairro: Recife Zip Code: 88701-420 jeffripe@rocketmail.com
Abstract Background: To evaluate marginal microleakage of two composite resins – a methacrylate- and a silorane-based submitted to different polymerization techniques and thermocycling. Material and Methods: Ninety-six class V cavities were prepared in sound human molars and restored under different polymerization and thermocycling regimens. The adhesive systems employed were Adper Scotchbond Multipurpose and Filtek P-90 for cavities restored with Z250 and P-90. The specimens were restored with Z250 or P-90, and divided into 3 subgroups with different polymerization techniques. The data were analyzed by Three way Analysis of Variance Test (p0.001). Conclusions: Silorane-based composite resins present lower marginal microleakage values when compared to methacrylate-based composites resins.

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