136 - Demineralization Inhibition at Restoration Margins of 3M Filtek One Material

Demineralization Inhibition at Restoration Margins of 3M Filtek One Material

Ames J, Shin K, Donly K

The University of Texas Health San Antonio School of Dentistry, San Antonio, TX

Abstract

Purpose: To determine the effect of ytterbium trifluoride, an opaquing agent, on demineralization inhibition potential of Filtek One Bulk Fill (3M ESPE).

Methods: Twenty extracted permanent molars and premolars had Class V preparations placed on the buccal surface with the preparation margins in enamel. All tooth surfaces had an acid-resistant varnish placed to within one millimeter of the preparation margins. Ten teeth had a Filtek One Bulk Fill restoration placed. Ten teeth had a resin control placed (Z250 3M ESPE). Each group of ten prepared restorations was placed in an agitated artificial caries solution (pH 4.5) for four days. They were then held in deionized water for two weeks before sectioning. Teeth were sectioned to obtain 100 μm sections and photographed using polarized light microscopy. The areas of the body of the lesions were measured using a computerized imaging system, and mean lesion body sizes were determined for each of the treatment group. Means were compared using a Mann-Whitney Rank Sum Test.

Results: The mean (±SD) of enamel demineralization (µm²) 100µ adjacent to the dental restorative material were: Filtek One Bulk Fill (1123.50 ±76.03) and Z250 (1117.51 ±224.51). The Mann-Whitney Rank Sum Test demonstrated no statistical significance in enamel demineralization adjacent to Filtek One Bulk Fill restorations compared to Z250 restorations. (P=.959).

Conclusions: The ytterbium trifluoride in Filtek One Bulk Fill does not prevent enamel demineralization at the restoration margin at current concentrations.