Estimation of relation between techniques of dye penetration for microleakage and SEM evaluation for marginal adaptation of the restoration

Soon-Joo Hwang; Dong-Hoon Shin

doi:10.5395/JKACD.2006.31.5.337

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Hwang and Shin: Estimation of relation between techniques of dye penetration for microleakage and SEM evaluation for marginal adaptation of the restoration

Original Article

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2006; 31(5): 337-343.

Published online: 30 September 2006

DOI: https://doi.org/10.5395/JKACD.2006.31.5.337

Estimation of relation between techniques of dye penetration for microleakage and SEM evaluation for marginal adaptation of the restoration

Soon-Joo Hwang, Dong-Hoon Shin

Department of Conservative Dentistry, College of Dentistry, Dankook University, Cheonan, Korea.

Corresponding Author: Dong-Hoon Shin. Department of Conservative Dentistry, School of Dentistry, Dankook University, San 7-1, Shinbu Dong, Cheonan, Chungnam, 330-714, Korea. Tel: 82-41-550-1965, Fax: 82-41-550-1963, donyshin@dankook.ac.kr

Received 17 April 2006 Revised 12 September 2006 Accepted 13 September 2006

(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

The purpose of this study was to estimate the relation between techniques used for microleakage from dye penetration and for marginal adaptation from SEM evaluation of the restoration.

Using high speed #330 bur, class V cavities (4 × 3 × 1.5 mm around CEJ) were prepared on the buccal surface of 20 extracted human molars. Six dimples as reference points for SEM and dye penetration evaluation were made with 1/2 round bur. Cavity was bulk filled with microhybrid composite resin (Esthet X) and all-in-one adhesive (Xeno III). Teeth were stored in saline solution for one day, after then, they were finished and polished using Sof-Lex system.

Fifty percent silver nitrate dye solution was used for the evaluation of microleakage and resin replica was used for marginal adaptation. All of these were done after 1000 times thermocycling between 5 and 55℃.

Vertical sections were made through three dimples of restoration to obtain samples for the evaluation of dye penetration and inner marginal adaptation. Outer adaptational estimation was done with an intact restoration before sectioning. Dye penetration was determined in three degrees and percentage of outer and inner leaky margin was estimated from SEM image.

The data were analysed statistically: Spearman's rho test were used to check relationships between two methods.

The result were as follows:

There were significant relationships between degree of dye penetration and inner and outer marginal adaptations each (p < 0.01).
However, there was no significant relationship between the results of inner and outer marginal adaptation.

Within the results of this study, relationship between the percentage of marginal adaptation and microleakage shows significant relationship. However, inner and outer marginal adaptation did not show any significant relationship mutually.

Keywords: Composite resin, Class V cavity, Microleakage, Marginal adaptation, Dye penetration, SEM evaluation

Figures and Tables

Figure 1

Schematic drawing of cavity and hemi-sphere indents.

Figure 2

Outer marginal adaptation from SEM evaluation: SEM image of outer marginal adaptation (A), mesuring length of full outer margin and marginal gap (B).

Figure 3

Inner marginal adaptation from SEM evaluation (× 40): a-length of occlusal wall: b-length of axial wall: c-length of gingival wall.

Table 1

Degree of dye penetration and percentage of outer/inner margin with gap

Table 2

Correlation between evaluation methods

^**; Correlation is significant at the .01 level (2-tailed).

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