Abstract
Surface substance loss of subsurface enamel lesions before (baseline/demineralization) and after each step of the infiltration technique was evaluated by means of a three-dimensional focus variation. Eighty enamel specimens were prepared and partially varnished (control). Non-varnished areas were demineralized (pH 4.95; 28 days), and etched with phosphoric acid gel (20%; 5 s). Specimens were randomly assigned to eight groups (n = 10), and were infiltrated using four resinous materials. In subgroups 1, polymerization and finishing with abrasive polishing strips followed. In subgroups 2, excess material was removed before polymerization (E1/E2-Excite, Vivadent; F1/F2-Fortify, Bisco; G1/G2-Glaze & Bond, DMG; I1/I2-Icon, DMG). Topometrical evaluation revealed a negligible substance loss of demineralized enamel. After etching, mean (±SD) differences of height decreased uniformly (−6.6 ± 2.0 μm; p = 0.089; ANOVA). For infiltrated lesions, DH of subgroups 1 was comparable to the etched lesions, with a significant increase (compared to etched lesions) in subgroups 2 (1.1 ± 0.1 μm; p < 0.001; t test). Within the limitations of this study, it is concluded that etching of initial subsurface lesions will result in significant surface substance loss; removal of excess material before light-curing should simplify the infiltration procedure, and this will avoid any abrasion resulting from polishing procedures.
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Acknowledgments
The authors are indebted to Dr. Konrad Neumann (Department of Biometry and Clinical Epidemiology, CharitéCentrum 4, Charité - Universitätsmedizin Berlin, Germany) for statistical supervision. Charité - Universitätsmedizin Berlin holds US and European patents for an infiltration technique for dental caries lesions in which two of the authors (JM, AMK) are appointed as inventors, and receive royalties. These patents have been licensed by DMG (Hamburg, Germany), and DMG has marketed the infiltrant studied in this report. No external funding, apart from the support of the authors’ institutions, was available for this investigator-initiated study.
Conflict of interest
None of the authors is involved in a potential conflict of interests. Relationship between authors (JM, AMK) and manufacturer (DMG) has been disclosed in Acknowledgements.
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F. Yang and J. Mueller have contributed equally to this study.
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Yang, F., Mueller, J. & Kielbassa, A.M. Surface substance loss of subsurface bovine enamel lesions after different steps of the resinous infiltration technique: a 3D topography analysis. Odontology 100, 172–180 (2012). https://doi.org/10.1007/s10266-011-0031-4
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DOI: https://doi.org/10.1007/s10266-011-0031-4