Color and hardness changes in artificial white spot lesions after resin infiltration

Ji-Hoon Kim; Ho-Hyun Son; Juhea Chang

doi:10.5395/rde.2012.37.2.90

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Kim, Son, and Chang: Color and hardness changes in artificial white spot lesions after resin infiltration

Research Article

Restorative Dentistry & Endodontics

Restorative Dentistry & Endodontics 2012; 37(2): 90-95.

Published online: 18 May 2012

DOI: https://doi.org/10.5395/rde.2012.37.2.90

Color and hardness changes in artificial white spot lesions after resin infiltration

Ji-Hoon Kim¹, Ho-Hyun Son, DDS, PhD², Juhea Chang, DDS, MSD, PhD³

MS student

Professor

Clinical assistant professor

¹Department of Dentistry, Seoul National University School of Dentistry, Seoul, Korea.

²Department of Conservative Dentistry, Seoul National University School of Dentistry, Seoul, Korea.

³Clinic for Persons with Disabilities, Seoul National University Dental Hospital, Seoul, Korea.

Correspondence to Juhea Chang, DDS, MSD, PhD. Clinical assistant professor, Clinic for Persons with Disabilities, Seoul National University Dental Hospital, 101 Daehag-ro, Jongro-gu, Seoul, Korea. TEL, +82-2-2072-3831; FAX, +82-2-2072-2854; juhchang@snu.ac.kr

Received 30 December 2011 Revised 24 February 2012 Accepted 24 February 2012

©Copyights 2012. The 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.

Abstract

Objectives

The purpose of this study was to determine the effect of resin infiltration technique on color and surface hardness of white spot lesion (WSL) with various degrees of demineralization.

Materials and Methods

Ten human upper premolars were cut and divided into quarters with a 3 × 4 mm window on the enamel surface. Each specimens were separated into four groups (n = 10) and immersed in demineralization solution to create WSL: control, no treatment (baseline); 12 h, 12 hr demineralization; 24 h, 24 hr demineralization; 48 h, 48 hr demineralization. Resin infiltration was performed to the specimens using Icon (DMG). CIEL^*a^*b^* color parameters of the enamel-dentin complex were determined using a spectroradiometer at baseline, after caries formation and after resin infiltration. Surface hardness was measured by Vickers Micro Hardness Tester (Shimadzu, HMV-2). The differences in color and hardness among the groups were analyzed with ANOVA followed by Tukey test.

Results

Resin infiltration induced color changes and increased the hardness of demineralized enamel. After resin infiltration, there was no difference in color change (ΔE^*) or microhardness among the groups (p < 0.05).

Conclusion

There was no difference in the effect of resin infiltration on color and hardness among groups with different extents of demineralization.

Keywords: Color measurement, Microhardness, Resin infiltration, White spot lesion

Figures and Tables

Figure 1

(a) Mean values of CIE L^* for three groups (12 h, 24 h, and 48 h demineralization time) measured at baseline, after careis formation, and after resin infiltration; (b) Mean values of CIE a^* for three groups; (c) Mean values of CIE b^* for three groups; (d) Mean values of color change (CIE ΔE^*) after caries formation (BL-CA) and after resin infiltration (BL-RI) for three groups.

Table 1

The difference in the mean values (SD) of CIE L^*, a^*, b^*, and ΔE^* among the control and the experimental groups after caries formation for three different demineralization times and corresponding resin infiltration

Different superscript letters denote the values that are significantly different from one another in each column (p < 0.05).

Table 2

The mean values (SD) of Vickers hardness after caries formation for three different demineralization times and corresponding resin infiltration

Different superscript letters denote the values that are significantly different from one another in each column (p < 0.05).

Notes

No potential conflict of interest relevant to this article was reported.

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