치아미백후 나노 하이드록시아파타이트의 영향 평가: 치아표면 강도 와 이온변화

J Contemp Dent Pract

In situ Effect of Nanohydroxyapatite Paste in Enamel Teeth Bleaching

치아미백시 나노 하이드록시아파타이트의 효과

 

Authors

Yasmin Sb de Lima Gomes 1 , Larissa D Alexandrino 1 , Cristiane de M Alencar 1 , Eliane B Alves 1 , Kelson Cf Faial 2 , Cecy M Silva 3

Affiliations

• 1 Department of Restorative Dentistry, Federal University of Para, Belem, Para, Brazil.

• 2 Department of Toxicology, Environment Section (SAMAM) Evandro Chagas Institute, Ananindeua, Para, Brazil.

• 3 Department of Restorative Dentistry, Federal University of Para, Augusto Correa Street No. 1, Guama, Belem, Para, Brazil, Phone: +559132521269 e-mail: cecymsilva@gmail.com.

  Abstract

  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).

  목표: 나노 하이드록시아파타이트의 35% 과산화 수소 미백 후 효과에 대한 평가: 이온변화, 표면강도, 컬러

  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.

  나노 하이드록시아파타이트 페이스트는 치아미백 후 치면 표면강도를 보완하고 손실 된 칼슘과 인이온을 보충하며 미백치료의 효과에 영향을 주지 않는다.

  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.

  Keywords: Dental enamel; Hydrogen peroxide; Hydroxyapatite Tooth bleaching..

 

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