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Effect of adhesive system on microleakage in class II direct composite restorations

C. NICOLA1,* , S. SAVA1, M. MOLDOVAN2, C. PREJMEREAN2, M. ROMÎNU3, C. BONDOR1, D. DUDEA1, F. ZENO3

Affiliation

  1. University of Medicine and Pharmacy “Iuliu Haţieganu”, 400023 Cluj-Napoca, Romania
  2. Chemistry Research Institute “Raluca Ripan”, Cluj-Napoca, Romania
  3. University of Medicine and Pharmacy “Victor Babeş“, Timişoara, Romania

Abstract

This study evaluated microleakage at the dentin/composite and enamel/composite interfaces in Class II restorations using 4 different newly-developed experimental hydroxyapatite-filled adhesive systems. Ninety-six box-type Class II standardized cavities were prepared on both proximal surfaces of previously extracted sound human molars with the cervical margin located 1mm above or below the cemento-enamel junction (CEJ). Teeth were randomly assigned to 4 groups (n=12) and conditioned with one of the 4 adhesive systems. Premise nanocomposite was incrementally inserted as the final restoration. The teeth were thermocycled and immersed in 0.5% basic fuchsine solution for 24 hours. The specimens were cut into 3 slices and the resulted sections were examined using a stereomicroscope under 40x magnification. The microleakage at the enamel and cementum margins was evaluated using an ordinal scale (0-3). Data were analyzed using the Kruskal- Wallis and Wilcoxon test at a p<0.05 level of significance. Significantly less microleakage was associated with the use of etch & rinse adhesive systems at the enamel surface. Between the enamel and the dentin margins significantly statistical differences were found just for etch & rinse adhesives. Etch & rinse three-step adhesive containing water and ethanol as solvent performed significantly better at the dentin margins..

Keywords

Enamel, Dentin, Microleakage, Adhesive systems, Dental composites, Stereomicroscope.

Submitted at: Nov. 13, 2007
Accepted at: April 4, 2008

Citation

C. NICOLA, S. SAVA, M. MOLDOVAN, C. PREJMEREAN, M. ROMÎNU, C. BONDOR, D. DUDEA, F. ZENO, Effect of adhesive system on microleakage in class II direct composite restorations, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 4, pp. 954-957 (2008)