Effects of the Incorporation of Bioactive Particles on Physical Properties, Bioactivity and Penetration of Resin Enamel Infiltrant

• Published in: Clinical, cosmetic and investigational dentistry Vol. 15; pp. 31 - 43
• Main Authors: Souza, Ana Ferreira, Souza, Marina Trevelin, Damasceno, Janaína Emanuela, Ferreira, Paulo Vitor Campos, Alves de Cerqueira, Gabriela, Baggio Aguiar, Flávio Henrique, Marchi, Giselle Maria
• Format: Journal Article
• Language: English
• Published: New Zealand Dove Medical Press Limited 01-01-2023; Taylor & Francis Ltd; Dove; Dove Medical Press
• Subjects: Analysis; Biological activity; Contact angle; Control equipment industry; Dental caries; dental caries. dental enamel. hydroxyapatite. scanning electron microscopy. confocal laser scanning microscopy; Dental enamel; Hydroxyapatite; Investigations; Mechanical properties; Morphology; Original Research; Polyesters; Polymerization; Scanning electron microscopy; Spectrum analysis; Brazil; California; United States; Japan; Germany; United States > US; dental caries; dental enamel; scanning electron microscopy; hydroxyapatite; confocal laser scanning microscopy
• ISSN: 1179-1357; 1179-1357
• DOI: 10.2147/CCIDE.S398514

The resinous infiltrant lacks remineralizing activity. This research aimed to develop and evaluate bioactivity, physico-mechanical properties and penetration of resin infiltrants containing Biosilicate or nanohydroxyapatite.
Experimental resin infiltrant (ERI; 75/25 wt.% TEGDMA/BisEMA) was divided among the groups Pure Experimental (PE); ERI + Biosilicate 5 or 10% (Bio5; Bio10), ERI + 10% nanohydroxyapatite (Hap10), and Icon (DMG, Germany). Bioactivity was analyzed by SEM, EDS and FT-IR/ATR after soaking in SBF. Degree of conversion (DC), sorption and solubility (SO; SOL), flexural strength, modulus of elasticity (FS; E-modulus), contact angle (CA) and penetration were characterized. Extent of penetration was analyzed by treating white spot lesions (WSL) in human dental enamel samples with the infiltrants and subsequently analyzing specimens by confocal laser scanning microscopy. Data from each test were submitted to ANOVA and Tukey's tests (p < 0.01).
SEM, EDS and FT-IR showed the formation of precipitates and increase in the rates of Ca and P in the groups with bioactive particles, after storage in SBF. Hap10 showed higher DC and CA values than all the other groups. Groups Bio5 and Bio10 showed CA values similar to those of Icon, higher SO and SOL values, and reduction in other properties. All infiltrants were capable of penetrating into the WSLs.
The incorporation of Biosilicate (5 or 10%) or nanohydroxyapatite (10%) into ERI induced mineral deposition on the surface and did not compromise infiltration and penetration into WSLs, however, compromising their physico-mechanical properties.