Synthesis and characterization of different nano-hydroxyapatites and their impact on dental enamel following topical application for dental bleaching.
J Dent
; 149: 105291, 2024 Oct.
Article
in En
| MEDLINE
| ID: mdl-39117099
ABSTRACT
OBJECTIVE:
This study aims to synthesize, characterize, and assess the penetration of hydrogen peroxide (HP), color change (CC), and surface morphology changes after the application of two distinct nano-hydroxyapatite (nano-HAp).METHODS:
Two nano-HAp were previously synthesized by co-precipitation one with rod-shaped particles (RS) and the other with spherical-shaped particles (SS). The surface charge of the nano-HAp particles was determined at varying pH levels and characterized by X-ray diffraction patterns and Fourier transform infrared spectroscopy. The morphology of the samples was assessed using scanning electron microscopy (SEM). The nano-HAp particles were applied before the dental bleaching procedure. Forty teeth were divided into four groups (n = 10) according to the bleaching treatment no treatment, bleaching with 35 % HP only, RS application and bleaching with 35 % HP, and SS application and bleaching with 35 % HP. HP concentration (µg mL-1) was measured using UV-Vis, while CC was evaluated with a digital spectrophotometer (ΔEab, ΔE00 and WID). Additionally, four teeth from each group were selected for SEM analysis. Statistical analysis encompassed one-way ANOVA, Tukey's, and Dunnet's tests.RESULTS:
RS and SS were successfully synthesized by coprecipitation, primarily differing in pH during synthesis. Both variations of nano-HAp morphology significantly reduced HP diffusion into the pulp chamber (p < 0.001). Regarding enamel morphology, groups analyzed post dental bleaching exhibited greater HAp deposition on the enamel surface. Notably, this deposition did not impede CC.SIGNIFICANCE:
The utilization of different nano-HAp morphologies prior to dental bleaching appears to be a promising strategy for mitigating adverse effects associated with dental bleaching procedures.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Surface Properties
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Tooth Bleaching
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X-Ray Diffraction
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Microscopy, Electron, Scanning
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Dental Enamel
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Tooth Bleaching Agents
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Hydrogen Peroxide
Limits:
Humans
Language:
En
Journal:
J Dent
Year:
2024
Document type:
Article
Affiliation country:
Country of publication: