Evaluation of experimental resin infiltrant containing nanohydroxyapatite on color stability and microhardness in demineralized enamel.

Autor: Zago JLG; Division of Operative Dentistry, Department of Restorative Dentistry, Piracicaba Dental School, Campinas State University - UNICAMP, Avenida Limeira 901, Piracicaba, São Paulo, Brazil. jadelgzago@gmail.com., de Cerqueira GA; Division of Operative Dentistry, Department of Restorative Dentistry, Piracicaba Dental School, Campinas State University - UNICAMP, Avenida Limeira 901, Piracicaba, São Paulo, Brazil., Ferreira RS; Division of Biochemistry, Department of Biosciences, Piracicaba Dental School, Campinas State University - UNICAMP, Piracicaba, São Paulo, Brazil., Aguiar FHB; Division of Operative Dentistry, Department of Restorative Dentistry, Piracicaba Dental School, Campinas State University - UNICAMP, Avenida Limeira 901, Piracicaba, São Paulo, Brazil., Tabchoury CPM; Division of Biochemistry, Department of Biosciences, Piracicaba Dental School, Campinas State University - UNICAMP, Piracicaba, São Paulo, Brazil., Marchi GM; Division of Operative Dentistry, Department of Restorative Dentistry, Piracicaba Dental School, Campinas State University - UNICAMP, Avenida Limeira 901, Piracicaba, São Paulo, Brazil.
Jazyk: angličtina
Zdroj: Clinical oral investigations [Clin Oral Investig] 2023 Nov; Vol. 27 (11), pp. 6835-6845. Date of Electronic Publication: 2023 Oct 06.
DOI: 10.1007/s00784-023-05298-3
Abstrakt: Objective: The aim of the study was to evaluate the effect of the addition of 10% nanohydroxyapatite in an experimental resin infiltrant on color stability and mineral loss.
Material and Methods: Bovine enamel blocks were randomized into five groups (n = 27/group): SE (sound enamel); ICL (initial caries lesion); I (Icon®); E (experimental infiltrant); EH (experimental infiltrant containing 10% nanohydroxyapatite). Color evaluation (n = 15) was performed and CIEL*a*b* values were obtained at points T 0 (baseline), T 1 (14 days immersed on coffee solution), and T 2 (28 days immersed) and data were calculated ∆E 00 , ∆W ID , ∆L*, ∆a*, and ∆b*. Cross-sectional microhardness (n = 12) was performed and lesion area (∆S) was calculated. Images were obtained with polarized light optical microscopy at 40 × magnification (n = 5).
Results: In color stability results, there was significant difference between time (14 and 28 days); ICL demonstrated significant difference among treated groups in all measures (∆L*, ∆a*, ∆b*, ∆E 00 , ∆W ID ) regardless of time; I and E demonstrated similar behavior on those measures and EH differed from I in ∆L*. For ∆S, ICL group showed a significant difference compared to I and EH groups, but did not differ from E.
Conclusion: The nanohydroxyapatite incorporation suggested an effective mineral recovery on initial caries lesion in depth; however, it showed high color variation, such as Icon. In terms of ∆S, I and EH had lower mineral loss, suggesting a reinforcement on initial caries lesion.
Clinical Relevance: Commercial and experimental infiltrants containing nanohydroxyapatite present low color stability and might reinforce mineral in initial caries lesion.
(© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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