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Cuspal deflection in premolar teeth restored with a Silorane and a Dimethacrylate-resin based composite (A comparative study) | ||
| Journal of baghdad college of dentistry | ||
| Article 1, Volume 23, Issue 3, 2011, Pages 11-16 | ||
| Authors | ||
| Inas I. Al-Rawi; Ayad M. Mahmoud Al-Obaidi | ||
| Abstract | ||
| ABSTRACTBackground: This study was conducted to evaluate and compare the cuspal deflection between 2 low-shrinkageresin composites ( Filtek™ Silorane ) and ( Tetric EvoCeram ), and the effect of using light-cured GIC (Vivaglass® Liner)and storage in water on cuspal deflection at different periods.Materials and methods: Forty extracted maxillary first premolars of approximately similar sizes were prepared withstandardized MOD cavities. The sample teeth then divided into two main groups ( 20 specimens each ) according tothe restorative material ( group A Filtek™ Silorane and group B Tetric B1: restored by Tetric EvoCeram with Vivaglass®Liner. Group B2: restored only by Tetric EvoCeram. All samples restored with oblique incremental technique. Theintercuspal distance was measured before and after the restorative procedures and after 1, 2 and 4 weeks of waterstorage and the difference were recorded as cuspal deflection. Cuspal deflection was measured using digitalmicrometer. Data were analyzed statistically by ANOVA and least significant difference (LSD) test.Results: Filtek™ Silorane significantly less cuspal deflection. Vivaglass® Liner significantly reduced cuspal deflectionwith Tetric EvoCeram. After four weeks water storage, cuspal deflection in all subgroups were highly significantlydifferent with the two restoratives (P<0.01) . While light-cured glass ionomer cement has a non significant effect oncuspal deflection after 4 weeks.Conclusions: Silorane showed lower cuspal deflection and lower water uptake than Tertic EvoCeram. Polymerizationshrinkage deformation was almost compensated by hygroscopic expansion within 4 weeks.Key words: Cuspal deflection, Silorane, Tetric Evoceram, hygroscopic expansion. (J Bagh Coll Dentistry 2011;23(3):11-16). | ||
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