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The Effect of Food Simulants on Enamel–Composite Bond Strength

¹ Departments of Child Dental Health,
² Dental Materials, and
³ Oral Biology, Newcastle Dental School, Framlington Place, Newcastle upon Tyne NE2 4BW, U.K.

R. S. Hobson, Child Dental Health, Newcastle Dental School, Framlington Place, Newcastle upon Tyne NE2 4BW, U.K.

Abstract

The effect of food simulants upon the enamel–composite bond strength of two orthodontic adhesive composites was studied. Thirty extracted premolars were used in each experimental group. Orthodontic brackets were bonded with either Transbond (3M Unitek) or Right-On (TP orthodontics) and were then exposed to either distilled water (control), 8 per cent ethanol (aqueous food), 50 per cent ethanol (alcoholic food), buffered lactic acid pH4 (acidic food), or corn oil (fatty food) for 12 weeks. Bond strength and Adhesive Remnant Index was recorded. It was found that 50 per cent ethanol had a significant effect upon the bond strength of both Transbond and Right-On. Right-On was affected to a greater extent. The clinical significance of this finding is that alcoholic mouth rinses, and alcohol-containing foods and drinks may be a causative factor in bond failure. However, the use of an alcoholic mouthrinse late in treatment may aid bracket removal. This potential use requires more research.

Refereed Scientific Paper

Key words: Bond Strength, Food Simulants, Orthodontics

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