评价含酸美白牙膏的相对牙本质磨损性。

Evaluation of Relative Dentin Abrasivity in Whitening Toothpastes Containing Acids.

机构信息

Department of Oral Anatomy and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea.

School of Dentistry, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia.

出版信息

Int Dent J. 2024 Oct;74(5):1044-1052. doi: 10.1016/j.identj.2024.04.004. Epub 2024 May 18.

DOI:10.1016/j.identj.2024.04.004

PMID:38762371

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11561478/

Abstract

INTRODUCTION AND AIMS

This study aimed to evaluate the relative dentin abrasivity of whitening toothpastes containing acids using the Radioactive Dentin Abrasivity - Profilometry Equivalent (RDA-PE).

METHODS

A total of 100 bovine dentin specimens were prepared and assigned to the following groups (n = 10): 5 hydrogen peroxide (HP) whitening toothpastes (WTH1-WTH5) with or without acid (citric acid, ethylenedinitrilotetraacetic acid disodium, and phosphoric acid), 2 whitening toothpastes with silica and containing citric or phosphoric acid (WTS1 and WTS2), one conventional toothpaste (CT), and 2 reference slurries (RS). All specimens were brushed for 4,000 or 10,000 strokes using toothbrush and toothbrushing machine. The average dentin depth was measured using a noncontact profilometery, and the RDA-PE value was calculated based on the RS. The pH of the solution, average particle size, particle content, and particle hardness were measured. The RDA-PE data were analysed using one-way analysis of variance and Tukey's test, and the effects of the 4 measured factors on RDA-PE were investigated via multiple regression analysis.

RESULTS

The RDA-PE values of the HP whitening toothpastes (mean value: 19-46) were significantly lower, whereas those of the silica whitening toothpastes (80 or 111) were similar to those of the RS after 4,000 strokes (100). The RDA-PE values of all whitening toothpastes were significantly lower than the RS values after 10,000 strokes (242). The HP whitening toothpastes were slightly acidic (pH ≤6) compared to the other solutions. The HP (2.9%-3.7%) and silica (8.9% or 9.9%) whitening toothpastes had significantly lower particle content than RS (16.6%). The particle content significantly influenced the RDA-PE values by multiple regression results.

CONCLUSIONS

The RDA-PE values of whitening toothpastes varied. The particle content in the solution was a key factor affecting the RDA-PE value.

CLINICAL RELEVANCE

Whitening toothpastes containing acids did not cause significant dentin abrasion.

摘要

简介和目的

本研究旨在使用放射性牙本质磨损 - 轮廓测量等效值（RDA-PE）评估含酸的美白牙膏的相对牙本质磨损率。

方法

共制备 100 个牛牙本质标本，分为以下几组（n=10）：5 种含过氧化物（HP）的美白牙膏（WTH1-WTH5），分别含有或不含有酸（柠檬酸、乙二胺四乙酸二钠和磷酸），2 种含硅且含有柠檬酸或磷酸的美白牙膏（WTS1 和 WTS2），1 种普通牙膏（CT）和 2 种参考浆料（RS）。所有标本均使用牙刷和刷牙机刷牙 4000 或 10000 次。使用非接触式轮廓仪测量牙本质的平均深度，并根据 RS 计算 RDA-PE 值。测量溶液的 pH 值、平均粒径、颗粒含量和颗粒硬度。使用单因素方差分析和 Tukey 检验分析 RDA-PE 数据，通过多元回归分析研究 4 个测量因素对 RDA-PE 的影响。

结果

HP 美白牙膏的 RDA-PE 值（平均值：19-46）在经过 4000 次刷牙后明显低于 RS（100），而经过 10000 次刷牙后则与 RS 相似（80 或 111）。所有美白牙膏的 RDA-PE 值在经过 10000 次刷牙后均明显低于 RS 值（242）。与其他溶液相比，HP 美白牙膏呈弱酸性（pH≤6）。HP（2.9%-3.7%）和硅石（8.9%或 9.9%）美白牙膏的颗粒含量明显低于 RS（16.6%）。多元回归结果表明，颗粒含量是影响 RDA-PE 值的关键因素。