经过咖啡浸泡后，牙釉质漂白后的上光处理是否会影响粗糙度和牙齿颜色稳定性？

Does polishing of bleached enamel affect roughness and tooth color stability after exposure to coffee?

机构信息

Dental School, CEUMA University, São Luis, Brazil.

Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil.

出版信息

J Esthet Restor Dent. 2022 Mar;34(2):351-359. doi: 10.1111/jerd.12869. Epub 2022 Jan 11.

DOI:10.1111/jerd.12869

PMID:35014755

Abstract

OBJECTIVE

This laboratory randomized study was designed to evaluate the effect of polishing on roughness and color stability of bleached teeth after coffee immersion.

MATERIALS AND METHODS

Ninety bovine crowns were randomly allocated to six groups (n = 15), according to bleaching protocols: At-home: standard protocol using 10% hydrogen peroxide (HP) or In-office: standard protocol using 35% HP; and with polishing protocols: (1) no polishing, (2) bleached enamel polished with #0.5 μm or (3) #2-4 μm diamond particles grit pastes. Samples were daily immersed into coffee solution for 45 min followed by mechanical brushing simulation (30 s) for 30 days. The surface roughness (Ra) and color alteration, expressed by ΔE , ΔE , and whitening index (WI) were analyzed at baseline, after bleaching/polishing protocols and after coffee solution staining. The surface from each group was examined using a scanning electron microscope. Data were analyzed by two-way repeated measure analysis of variance followed by the Tukey test (α = 0.05).

RESULTS

Staining increases Ra, ΔE , ΔE , and decreases WI values. Polishing after bleaching did not prevent staining, however, tooth polished with #0.5 μ-grit polishing paste showed better performance than #2-4 μ-grit (ΔE : p = 0.001/ΔE : p = 0.003). Scanning electron microscope revealed a more irregular surface after coffee staining for all groups regardless bleaching/polishing protocols.

CONCLUSIONS

Using #0.5 μ-grit diamond paste to polish 35%HP in-office bleached enamel reduces the roughness and tooth staining. However, polishing after 10%HP at-home bleached enamel neither affects roughness nor improves tooth color stability after exposure to coffee.

CLINICAL SIGNIFICANCE

Polishing after at-home bleaching does not have benefits but after 35% hydrogen peroxide in-office bleaching, the polishing with #0.5 μ-grit polishing paste is indicated to reduce roughness and the tooth staining over time.

摘要

目的

本实验室随机研究旨在评估咖啡浸泡后抛光对漂白牙齿粗糙度和颜色稳定性的影响。

材料与方法

根据漂白方案，将 90 个牛牙冠随机分配至 6 个组（n=15）：家庭组：使用 10%双氧水（HP）的标准方案；诊室组：使用 35%HP 的标准方案；抛光方案：（1）不抛光，（2）用 0.5μm 或（3）2-4μm 金刚石颗粒研磨膏抛光漂白牙釉质。样品每天浸入咖啡溶液中 45 分钟，然后进行机械刷洗模拟（30 秒）30 天。在基线、漂白/抛光方案后和咖啡溶液染色后，分析表面粗糙度（Ra）和颜色变化，用 ΔE、ΔE和增白指数（WI）表示。使用扫描电子显微镜检查每组的表面。采用双向重复测量方差分析，然后采用 Tukey 检验（α=0.05）进行数据分析。