Department of Periodontology, Manipal College of Dental Sciences, Manipal, Manipal Academy of Higher Education (MAHE), Manipal, Karnataka, India.
Can J Dent Hyg. 2023 Jun 1;57(2):123-131. eCollection 2023 Jun.
Charcoal-based preparations have recently gained popularity, particularly in oral hygiene products such as tooth whitening dentifrices, owing to their abrasive and adsorptive properties. The present in vitro study evaluates the efficacy of a charcoal-based tooth whitening dentifrice compared with a non-charcoal-based whitening dentifrice in removing coffee stains on tooth surfaces.
Thirty-three human extracted tooth specimens were randomly assigned to 1 of 3 study groups: Group 1 (charcoal-based whitening dentifrice [CBWD]), Group 2 (non-charcoal-based whitening dentifrice [NCBWD]), and Group 3 (distilled water [DW]). All tooth specimens were immersed in a prepared coffee extract for 4 weeks to facilitate staining and then mounted on blocks where they were brushed with an electric toothbrush daily for 8 seconds with 1 of the 2 allocated dentifrices or with DW for 4 weeks following staining. Spectrophotometric analysis was conducted using the CIELAB system to measure the L, a, and b values at 3 time points: before staining, after staining, and following the brushing protocol. These values were used to calculate the colour change (ΔE) between time points.
Following the coffee staining, the tooth samples' whiteness (ΔL) decreased with the overall colour change (ΔE). Next, there was a significant improvement in the degree of tooth whiteness (ΔL) values following the brushing protocol in all 3 groups ( = 0.003), with the greatest improvement occurring in the CBWD group. However, the overall colour change (ΔE) was not significantly different between the groups.
CBWD, NCBWD, and DW were effective in removing coffee stains from the tooth surface. However, the amount of colour change (ΔE) produced by CBWD was not significantly different from NCBWD or DW.
由于具有研磨和吸附特性，基于木炭的制剂最近在口腔卫生产品（如牙齿美白牙膏）中变得越来越受欢迎。本体外研究评估了一种基于木炭的牙齿美白牙膏与非基于木炭的美白牙膏在去除牙齿表面咖啡渍方面的功效。
将 33 个人工提取的牙齿标本随机分配到 3 个研究组之一：第 1 组（基于木炭的美白牙膏[CBWD]）、第 2 组（非基于木炭的美白牙膏[NCBWD]）和第 3 组（蒸馏水[DW]）。所有牙齿标本都浸入准备好的咖啡提取物中 4 周以促进染色，然后将其安装在块上，用电动牙刷每天刷牙 8 秒，使用 2 种分配的牙膏之一或在染色后使用 DW 刷牙 4 周。使用 CIELAB 系统进行分光光度分析，以测量 L、a 和 b 值在 3 个时间点：染色前、染色后和刷牙方案后。这些值用于计算时间点之间的颜色变化（ΔE）。
在咖啡染色后，牙齿样本的白度（ΔL）随着整体颜色变化（ΔE）而降低。接下来，在所有 3 个组中，刷牙方案后牙齿白度（ΔL）值都有显著提高（= 0.003），CBWD 组的提高最大。然而，各组之间的整体颜色变化（ΔE）没有显著差异。
CBWD、NCBWD 和 DW 均可有效去除牙齿表面的咖啡渍。然而，CBWD 产生的颜色变化（ΔE）量与 NCBWD 或 DW 没有显著差异。
