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The effect of a bioglass paste on enamel exposed to erosive challenge
Ahmed Samir Bakry1, Hanadi Y Marghalani2, Omayma A Amin3
1Operative Dentistry Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudia Arabia; Conservative Dentistry Department, Faculty of Dentistry, Alexandria University, Egypt; Japan Society for the Promotion of Science, Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
Objectives:
The current study is evaluating the effect of using a 45S5 bioglass paste and topical fluoride application on the cross sectional micro-hardness and the chemical surface changes of eroded enamel.
Methods:
Enamel discs were obtained from the buccal surface of one hundred extracted human non-carious third molars. The enamel surfaces were ground flat and each disc was coated with two layers of acid resistant nail varnish except for an exposed treatment window (3mm×2mm) on the buccal surface of the tooth. All specimens were challenged for 60 min by orange juice (Tropicana, Chicago, USA) pH 3.85+0.5. The specimens were divided into four groups: the 45S5 bioglass paste group, fluoride gel group (5 min application), fluoride gel group (24h application) while the rest of specimens served as control. The cross-sectional micro-hardness of 20 specimens from each group was measured. Five specimens from each group had their top eroded enamel surfaces examined by SEM-EDS. One-way ANOVA was used to compare the cross-sectional micro-hardness of the three groups p<0.05.
Results:
45S5 bioglass paste application significantly improved the sub-surface eroded enamel when compared to fluoride and control specimens (p<0.05).
Conclusion:
45S5 bioglass paste can efficiently improve the micro-hardness of the sub-surface eroded enamel surface.
Clinical Significance:
The use of the 45S5 Bioglass paste can be used efficiently as a potent remineralizing agent for the sub-surface enamel lesions resulting from erosive challenges.
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