体外树脂渗透对后牙白斑病变的颜色遮蔽预测。

Color masking prediction of posterior white spot lesions by resin infiltration in vitro.

机构信息

Department of Restorative Dentistry, Institute of Science and Technology, São Paulo State University - UNESP, São José dos Campos, São Paulo, Brazil.

出版信息

J Dent. 2020 Apr;95:103308. doi: 10.1016/j.jdent.2020.103308. Epub 2020 Feb 26.

DOI:10.1016/j.jdent.2020.103308

PMID:32112912

Abstract

OBJECTIVE

To investigate parameters that could predict the color masking effect (ME) of white spot lesions (WSLs) after resin infiltration (RI).

METHODS

Sixty extracted human teeth with natural WSLs were selected (28 premolars, 29 molars and 3 incisors). At baseline, the laser fluorescence (LF) of surrounding sound enamel (SE) and the WSLs were analyzed with DIAGNOdent. Standardized photographs were obtained under D65 and UV illuminants, from which the CIE Lab* color coordinates and natural fluorescence (NF) of the WSLs and SE were obtained. The color difference (ΔE) and differences of NF and LF between the SE and WSLs were calculated. The lesion dimensions (area, perimeter, width, and height) were determined. After RI, the assessments were repeated. ME was considered as the reduction of ΔE values after RI. One-way ANOVA and the Tukey tests were used to analyze the absolute means of the LF and NF values. The t test was used to compare the ΔE values and lesion dimensions before and after infiltration. The correlations between all parameters at baseline and ME were analyzed.

RESULTS

The absolute mean values of LF at the baseline (B) and after infiltration (I) were SE/B-3.98a, WSL/B-13.28c, SE/I-3.36a, WSL/I-7.95b (p = 0.001). The mean values for NF were SE/B-7.93a; WSL/B-6.29b, SE/I-7.93a, WSL/I-7.27a (p = 0.001). The results for ΔE were B-11.74a, I-8.66b (p = 0.001). RI significantly reduced lesion dimensions. No correlations were observed between the baseline parameters and the ME.

CONCLUSIONS

The WSLs presented higher LF and smaller NF than SE, which were respectively reduced and increased after RI. Prediction of the masking effect by the parameters evaluated at baseline was not possible, which could be due to the choice of mainly caries lesions in posterior teeth. Nonetheless, infiltration was found suitable to mask most of the WSL.

CLINICAL SIGNIFICANCE

The color masking effect of white spot lesions after resin infiltration cannot be predicted by a previous analysis of fluorescence, color, or dimensions of the lesion.

摘要

目的

研究能够预测牙釉质表面白斑（WSL）经树脂渗透（RI）后颜色掩蔽效果（ME）的参数。

方法

选择 60 颗具有天然 WSL 的人离体牙（28 颗前磨牙、29 颗磨牙和 3 颗切牙）。在基线时，使用 DIAGNOdent 分析周围正常釉质（SE）和 WSL 的激光荧光（LF）。在 D65 和 UV 光源下获得标准照片，从中获得 WSL 和 SE 的 CIE Lab*颜色坐标和自然荧光（NF）。计算 SE 和 WSL 之间的颜色差异（ΔE）和 NF 和 LF 的差异。确定病变的尺寸（面积、周长、宽度和高度）。RI 后重复评估。ME 被认为是 RI 后 ΔE 值的降低。使用单因素方差分析和 Tukey 检验分析 LF 和 NF 值的绝对值均值。使用 t 检验比较渗透前后的 ΔE 值和病变尺寸。分析基线时所有参数与 ME 之间的相关性。

结果

基线（B）和渗透后（I）时 LF 的绝对值均值分别为 SE/B-3.98a、WSL/B-13.28c、SE/I-3.36a、WSL/I-7.95b（p=0.001）。NF 的均值分别为 SE/B-7.93a；WSL/B-6.29b、SE/I-7.93a、WSL/I-7.27a（p=0.001）。ΔE 的结果分别为 B-11.74a、I-8.66b（p=0.001）。RI 显著降低了病变的尺寸。基线参数与 ME 之间无相关性。