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Effect of a desensitizer on dentinal bond strength in cementation of composite resin inlay


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Effect of a desensitizer on dentinal bond strength in cementation of composite resin inlay

Article information

Restor Dent Endod. 2009;34(3):223-231
Publication date (electronic) : 2009 May 31
doi : https://doi.org/10.5395/JKACD.2009.34.3.223
Sae-Hee Han1, Young-Gon Cho2
1Department of Conservative Dentistry, Dental Center, Chung Ang University Hospital, Korea.
2Department of Conservative Dentistry, College of Dentistry, Chosun University, Korea.
Corresponding Author: Young-Gon Cho. Department of Conservative Dentistry, Chosun University, 421 Seosuk-dong, Dong-gu, Gwangju 501-825, Korea. Tel: 82-62-220-3840, Fax: 82-62-232-9064, ygcho@chosun.ac.kr
Received 2009 March 23; Revised 2009 April 27; Accepted 2009 May 01.

Abstract

The purpose of this study was to evaluate the effect of a desensitizer on dentinal bond strength in cementation of composite resin inlay. Fifty four molar teeth were exposed the occlusal dentin. Class I inlay cavities were prepared and randomly divided into six groups. Control group ; no agent, Group 1 ; Isodan, Group 2 ; One-step, Group 3 ; All-Bond SE, Group 4 ; Isodan + One-step, Group 5 ; Isodan + All-Bond SE.

Desensitizing agent and dentin bonding agents were applied immediately after the completion of the preparations. Impressions were then made. The composite resin inlays (Tescera, Bisco) were fabricated according to the manufacturers' guidelines. Cementation procedures followed a standard protocol by using resin cement (Bis-Cem, Bisco). Specimens were stored in distilled water at 37℃ for 24 hours.

All specimens were sectioned to obtained sticks with 1.0 × 1.0 mm2 cross sectional area. The microtensile bond strength (µTBS) was tested at crosshead speed of 1 mm/min. The data was analyzed using oneway ANOVA and Tukey's test. Scanning electron microscopy analysis was made to examine the details of the bonding interface.

1. Group 1 showed significantly lower µTBS than other groups (p<0.05).

2. There was no significant difference between the µTBS of Group 3 and Group 5.

3. The µTBS of Group 4 showed significantly lower than that of Group 2 (p<0.05).

In conclusion, a desensitizer (Isodan) might have an adverse effect on the bond strength of composite resin inlay to dentin.

Keywords: Desensitizer; Cementation; Composite resin inlay; Microtensile bond strength; Scanning electron microscopy analysis

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Article information Continued

Copyright © 2009 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.

Figure 1

Figure 1

SEM photograph showing the gap at the dentin-resin cement interface produced by Control group (no agent).

Figure 2

Figure 2

2. SEM photograph showing the gap at the dentin-resin cement interface produced by Group 1 (Isodan).

Figure 3

Figure 3

SEM photograph showing the close adaptation at the dentin-resin cement interface produced by Group 2 (One-step).

Figure 4

Figure 4

SEM photograph showing the close adaptation at the dentin-resin cement interface produced by Group 3 (All-Bond SE).

Figure 5

Figure 5

SEM photograph showing the gap at the dentin-resin cement interface produced by Group 4 (Isodan + One-step).

Figure 6

Figure 6

SEM photograph showingthe close adaptation of the dentin-resincement interface by Group 5 (Isodan + All-Bond SE).

Table 1

Material, composition and manufacturer

Table 1

All information provided by manufacturers.

BPDM: bisdimethacrylate, HEMA: Hydroxyethylmethacrylate, UDMA: urethane dimethacrylate,

Bis-GMA: Bisphenol-glycidyl methacrylate.

Table 2

Group classification

Table 2

Table 3

Microtensile bond strength (MPa) for each group

Table 3

Superscripts of the same letter mean statistically no significant difference (p < 0.05, one-way ANOVA and Tukey's test)