Resumo

LOIS MASTACH, FJ.; PAZ ROCA, C; PAZOS SIERRA, R.  e  RODRIGUEZ-PONCE, A.. Microleakage of class II condensable resin composite restorations. Av Odontoestomatol [online]. 2004, vol.20, n.2, pp.85-94. ISSN 2340-3152.

Objective: The purpose of this study was to evaluate microleakage in Class II cavities with gingival margins in enamel, restored with the condensable resin composite Surefil, placed with a bulk or an incremental filling technique and with or without a liner. Method and materials: 104 cavities prepared on extracted human teeth were randomly distributed into four treatment groups (n=26): group I, bulk filling technique; group II, bulk filling technique with Dyract flow liner; group III, incremental filling technique; group IV, incremental filling technique with Dyract flow liner. Samples were stored in water for 24 hours, thermocycled between 5°C and 55°C for 500 cycles, stained with 0.5% basic fuchsin dye for 24 hours, sectioned longitudinally and scored for microleakage. Results: Group I showed significantly more gingival marginal microleakage than did groups II, III and IV. Conclusion: Even though none of the filling techniques could completely prevent microleakage, the incremental technique and the use of Dyract flow as a liner significantly reduced it.

Palavras-chave : Microleakage; Condensable resin composite; Class II cavity; Liner.

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