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The influence of bioactive glass (BGS-7) on enamel remineralization: an in vitro study
Chaeyoung Lee1, Eunseon Jeong1, Kun-Hwa Sung1,2
1Department of Conservative Dentistry, School of Dentistry, Wonkwang University, Iksan, Korea.
Objectives:
The aim of this study was to compare the remineralizing capacity of bioactive glass (BGS-7, CGBIO) with other agents.
Methods:
Twenty caries-free third molars were sectioned and demineralized. Specimens were divided into four groups: (1) control, (2) Clinpro XT varnish (Solventum), (3) 1.23% acidulated phosphate fluoride gel, and (4) a new type of CaO-SiO2-P2O5-B2O3 system of bioactive glass ceramics (BGS-7). Agents were applied and stored in simulated body fluid at 37℃ for 2 weeks. Microhardness was measured using the Vickers hardness testing method. Five specimens per group were analyzed using quantitative light-induced fluorescence (QLF) to assess mineral loss. Field-emission scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDS) were used to examine the surface morphology and elemental composition. Data were analyzed using paired t-test and one-way analysis of variance (p < 0.05).
Results:
BGS-7 showed the highest microhardness values and the greatest recovery in QLF analysis (p < 0.05). FE-SEM revealed granular precipitates on demineralized enamel in the BGS-7 group. EDS confirmed the presence of newly formed silicon and fluoride layers.
Conclusions:
BGS-7 demonstrated superior remineralization capacity compared to other agents, suggesting its potential as an effective remineralizing material.
