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Published on: June 6, 2025
Effect of thermocycling and varying polymerization techniques on the restorative interface of class V cavities
Jefferson-Ricardo Pereira1, Lindomar-Corrêa Júnior2, Marcus-Vinicius-Reis Só3
1DDS, MSc, PhD, Department of Prosthodontics, University of Southern Santa Catarina, Tubarão, Santa Catarina, Brazil.
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 (p<0.05).
Results:
Micro infiltration lower scores were found in groups which were used silorane-based resin with significant statistical difference compared with the specimens restored with methacrylate-based resin, independently of polymerization type used and thermocycling (P>0.001).
Conclusions:
Silorane-based composite resins present lower marginal microleakage values when compared to methacrylate-based composites resins. Key words:Composite resin, microleakage, polymerization.
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