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The influence of the degree of saturation of acidulated buffer solutions in the root dentin demineralization


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The influence of the degree of saturation of acidulated buffer solutions in the root dentin demineralization

Article information

Restor Dent Endod. 2004;29(5):454-461
Publication date (electronic) : 2004 September 30
doi : https://doi.org/10.5395/JKACD.2004.29.5.454
Hye-Sil Kang, Chan-Young Lee
Department of Conservative Dentistry, College of Dentistry, Yonsei University, Korea.
Corresponding author: Chan-Young Lee. Department of Conservative Dentistry, College of Dentistry, Yonsei University, Sinchon-dong 134, Seodaemun-gu, Seoul, Korea, 120-752. Tel: 82-2-361-8700, chanyoungl@yumc.yonsei.ac.kr

Abstract

The purpose of this study is to compare and to evaluate the effects of the degree of saturation on the progression of artificial root caries lesion.

A total of 8 human premolars without any defects and cracks selected and the cementum were removed and the teeth were cleaned with ultrasonic device and pumice without fluoride.

Each tooth was sectioned into 6 pieces and they were ground with #800 sandpaper until they had a thickness of 200µm. Specimens were applied with nail vanish except for the 2-3 mm window area after application of bonding agent. Under the constant pH, the specimens were divided into 6 groups (degree of saturation; 0.1415, 0.1503, 0.1597, 0.1676, 0.1771, 0.1977). Each group was immersed in acid buffer solution for 1, 2, 3, 5 days under controlled temperature (25℃) and imbibed in water and examined using the polarizing microscope.

The results were as follows

1. Although the degree of saturation of demineralization solution decreased, the depth of penetration in the dentin was constant.

2. Erosion was observed on the surface of all the teeth in the group I, II. In the group III, IV, V, surfaces were not changed. The teeth in the group VI showed the more mineralized surface but not the shape of the dentinal tubules distinctively.

3. In all groups, the lesion progressed rapidly at the first day of the experiment, but increased gradually as time elapsed.

Keywords: Dentin demineralization; Degree of saturation; Acid buffer solution

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Article information Continued

Copyright © 2004 Korean Academy of Conservative Dentistry
(open-access) :

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Figure 1

Figure 1

Tooth specimen

Figure 2

Figure 2

Position of tooth specimen

Figure 3

Figure 3

Demineralization

Figure 4

Figure 4

Group I,II

Figure 5

Figure 5

Group III, IV

Figure 6

Figure 6

Group VI

Figure 7

Figure 7

Mean depth of demineralization (µm) - Days

Figure 8

Figure 8

Mean depth of demineralization (µm) - Groups

Table 1

Composition of initial demineralized solution (mM)

Table 1

Table 2

Mean depth of demineralization (µm)

Table 2