Beneficial effects of hydroxyapatite on enamel subjected to 30% hydrogen peroxide

Jiang, Tao; Ma, Xiao; Wang, Zhejun; Tong, Hua; Hu, Jiming; Wang, Yining

doi:10.1016/j.jdent.2008.07.005

Cited by 50 publications

(59 citation statements)

References 43 publications

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“…Nano-HAP was synthesized in a wet condition according to the method of Boanini et al, 28 with some modifications. 29 4 OH, was added drop-wise under stirring. The precipitate was maintained in contact with the reaction solution for 5 hours at 90°C under stirring, and then, centrifuged at 1800 g for 10 minutes.…”

Section: Synthesis Of Nano-hapmentioning

confidence: 99%

In situ Effect of Nanohydroxyapatite Paste in Enamel Teeth Bleaching

Gomes¹,

Alexandrino²,

Alencar³

et al. 2017

The Journal of Contemporary Dental Practice

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Aim: Evaluate in situ the effect of nanohydroxyapatite paste (nano-HAP) before bleaching with hydrogen peroxide 35% (HP35%) by ion chromatography (IC) Knoop hardness number (KHN) and tristimulus colorimetry (TC). Materials and methods:A total of 60 fragments were obtained from third molars included (3 mm × 3 mm × 3 mm) and the specimens were divided into three groups (n = 20): Gas chromatography (CG) (negative control group) = no bleaching; HP35% (positive control group) = HP35% whitening (whiteness HP35%); nano-HAP = application for 10 minutes before bleaching treatment + HP35%. The specimens were fixed to the volunteers' molars. The KHN and TC were measured before and after bleaching. For IC, the dentin layer was removed, leaving the enamel that was crushed, and autoclaved for chemical quantification (calcium, fluorine, and phosphorus). The results of KHN and TC were analyzed statistically by analysis of variance (ANOVA) followed by Tukey test (p < 0.05). Results:The HP35% group showed reduction of the Ca, F, and P ions. The initial and final KHN mean of the CG and nano-HAP did not differ statistically; however, the group of HP35% did differ statistically. The mean ΔE of the HP35% and nano-HAP groups did not differ statistically from each other. However, they differed from the CG. Conclusion:The nano-HAP paste preserved the KHN, promoted the lower loss of Ca and P ions and an increase of F ions when compared with the CG, but did not influence the effectiveness of the bleaching treatment.Clinical significance: Nano-HA is a biomaterial that has shown positive results in the prevention of deleterious effects on the enamel by the action of the office bleaching treatment.

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Section: Synthesis Of Nano-hapmentioning

confidence: 99%

In situ Effect of Nanohydroxyapatite Paste in Enamel Teeth Bleaching

Gomes¹,

Alexandrino²,

Alencar³

et al. 2017

The Journal of Contemporary Dental Practice

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show abstract

“…They reveal that is has an intricate organic-inorganic hybrid organization with hierarchical levels. First, needle-like hydroxyapatite (HAP) crystals pack tightly into groups and the organic matrix binds these crystals together [11,12]. The crystals are then organized into the base structural unit, the enamel prism, in a species-specific manner.…”

Section: Introductionmentioning

confidence: 99%

Compositional, structural and mechanical comparisons of normal enamel and hypomaturation enamel

Liang

et al. 2014

Acta Biomaterialia

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“…21,22 However, few studies did attempt to investigate the effects of pH value on tooth structure and components, although majority of previous studies focused on the concentrations, product formats, application modes and times. 1,4,21,23 In a previous study, 24 it was demonstrated that the combination of HP and hydroxyapatite (HA) was effective in tooth bleaching. HA could significantly reduce the microhardness loss of enamel caused by 30% HP and make little change on the morphology of enamel surface.…”

Section: Introductionmentioning

confidence: 99%