Progression of Sealed Initial Bovine Enamel Lesions under Demineralizing Conditions in vitroParis S.a · Meyer-Lueckel H.a · Mueller J.a · Hummel M.b · Kielbassa A.M.a
aDepartment of Operative Dentistry and Periodontology, University School of Dental Medicine, bInstitute of Pathology, Campus Benjamin Franklin, Charité, Universitätsmedizin Berlin, Germany
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Article / Publication Details
The use of sealants for the infiltration of proximal enamel lesions could be a promising alternative to the common strategies of remineralization and operative treatment. The aim of the present study was to compare the progression of sealed initial enamel lesions after exposure to a demineralizing solution in vitro. In each of 54 bovine enamel specimens three subsurface lesions were created. Two of the lesions were etched with phosphoric acid and sealed with either a fissure sealant or with various adhesives (1–5) for 15 s or 30 s, respectively, whereas one lesion remained as the untreated control. Subsequently, half of each specimen was covered with nail varnish (baseline) and the other half was reexposed to a demineralizing solution for 14 days (experimental). The specimens were cut perpendicularly to the surface, infiltrated with a low-viscosity fluorescent resin and observed with a confocal laser scanning microscope (CLSM). For lesions sealed with the fissure sealant and adhesives 1–3, the progression of lesion depth (0–31 µm) was significantly decreased (p < 0.01; paired t test) compared with the untreated control (57 µm). For the fissure sealant and adhesives 1 and 3 extended penetration times (30 s) resulted in significantly reduced lesion progression compared to 15 s. It can be concluded that filling of the pores in initial enamel lesions with the fissure sealant and adhesives 1–3 can inhibit further demineralization in vitro.
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