Bacterial Leakage Assessment for Different Types of Resin-Based Dental Restorations Applied Using Various Placement Methods

Moosavi, Horieh and Afshari, Elham and Forghani, Maryam and Ghazvini, Kiarash and Velayati, Fatemeh (2014) Bacterial Leakage Assessment for Different Types of Resin-Based Dental Restorations Applied Using Various Placement Methods. Journal of Dental Materials and Techniques, 3 (4). pp. 158-165.

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Abstract

Introduction: Although composite resins have improved greatly since their introduction, microleakage is one of the most frequently encountered problems. This study compared the effects of different monomer systems and layering techniques on the bacterial leakage of Cl I composite resin restorations. Methods: Eighty-two sound human third molars were used. The teeth were randomly divided into six groups of 12 teeth each and two positive and negative control groups of five teeth. Class I cavities, measuring 4×4×2 mm, were prepared. The first three groups were filled with a silorane-based composite (Filtek P90) using three different methods of filling (bulk, incremental and snowplow) and the remaining three groups were filled with a methacrylate-based composite (Clearfil AP-X) using the same techniques. The specimens were stored for 24 hours at 37°C and then thermocycled up to 1000 cycles. The bacterial leakage of the specimens was assessed in a microbiological laboratory and statistical analyses of data were performed by Fisher’s exact and chi-squared tests (P<0.05). Results: There were no significant differences between Filtek P90 and Clearfil AP-X (P=1) in terms of microleakage. The difference between the outputs related to three filling techniques was not significant, either (P>0.05). Conclusion: Leakage occurred similarly in both silorane- and methacrylate-based composite resins and three filling techniques.

Item Type: Article
Subjects: WU Dentistry. Oral surgery
Divisions: Journals > J Dental Materials and Techniques
Depositing User: jdmt jdmt
Date Deposited: 24 Sep 2017 15:13
Last Modified: 24 Sep 2017 15:13
URI: http://eprints.mums.ac.ir/id/eprint/3528

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