치아미백후 거칠어진 치면관리

J Esthet Restor Dent

2022 Dec;34(8):1290-1299.

 doi: 10.1111/jerd.12969. Epub 2022 Oct 7.

Nano-hydroxyapatite-induced remineralization of artificial white spot lesions after bleaching treatment with 10% carbamide peroxide

10% 카바마이드 퍼록사이드 치아미백치료후 인공탈회의 재광화를 유도하는 나노 하이드록시아파타이트

Amanda Cristina Brezolini da Freiria 1, Mariangela Ivette Guanipa Ortiz 1, Danielle Ferreira Souza de Sobral 1, Flavio Henrique Baggio Aguiar 1, Débora Alves Nunes Leite Lima 1

Affiliations expan

 

 

Abstract

Objective: To assessed in vitro the effect of nanohydroxyapatite (n-HA) to improve the aesthetic appearance and microhardness of white spot lesions (WSL) when associated with a low-concentration bleaching agent (carbamide peroxide-CP10%).

Material and methods: Enamel/dentin specimens (n = 60) of 5 × 5 × 2.2 mm were prepared, of these, 48 were submitted to pH-cycling to create artificial WSL. Subsequently, these were allocated into five groups (n = 12): n-HA; n-HA + CP10%; CP10%; WSL control (WSLC ); sound control (Sound). The color was assessed at baseline, pre-treatment, and post-treatment using a spectrophotometer, and the color (ΔE/ΔE00 ) and whiteness index (ΔWID) alterations were determined. The enamel cross-sectional microhardness (CSMH) was evaluated (post-treatment) with a Knoop indenter, 25gf/5 s, 20-200 μm. The data was analyzed through generalized linear models (α = 5%).

Results: ΔE and ΔE00 were significantly higher for the bleached groups (n-HA + CP10% and CP10%), and the n-HA was higher than the WSLC group (p < 0.05). ΔWID was significantly higher for the bleached groups (p < 0.05). The CSMH values were significantly higher in the sound group than in the n-HA, CP10%, and WSLC groups (p < 0.05). The WSLC had lower microhardness than the n-HA + CP10% and sound groups (p < 0.05).

Conclusion: n-HA is suitable to remineralize and recover the color of the WSL. However, its association with CP10% maintains the esthetical outcome while increasing its in-depth remineralizing effect.

Clinical significance: Considering the aesthetic and functional repercussions of the WSL persistence, treatments that tend to improve its physical appearance and reinforce its weakened substructure in a non-invasive way are ideal. For this associating low-concentration, bleaching agents to the remineralizing treatments is promising to treat this type of lesions.

Keywords: carbamide peroxide; dental; hydroxyapatites; nano-hydroxyapatite; tooth bleaching; tooth remineralization; white spot.

 

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