J Korean Acad Conserv Dent.  2008 Nov;33(6):526-536. 10.5395/JKACD.2008.33.6.526.

The effect of various bonding systems on the microtensile bond strength of immediate and delayed dentin sealing

• Ha JH
• Kim HC
• Hur B
• Park JK

• KMID: 1428463
• DOI: http://doi.org/10.5395/JKACD.2008.33.6.526

Abstract

The purpose of this study was to compare the effect of various dentin bonding systems on microtensile bond strength of immediate dentin sealing (IDS) and delayed dentin sealing (DDS). Eighteen extracted permanent molars were used in this study. The teeth for DDS group were restored with a provisional restorations, and immersed in saline solution for 1 week, and divided into 3 subgroups according to various dentin bonding adhesives; SB subgroup (3 step total-etch adhesive), SE subgroup (2 step self-etch adhesive), XE subgroup (1 step self-etch adhesive). In IDS group, the teeth were divided into 3 subgroups, and applied with bonding adhesives as in DDS group. The teeth were restored with provisional restorations, and immersed in saline solution for 1 week. Indirect composite disc was cemented with resin cement, and all specimens were subjected to microtensile bond strength. The data were statistically analyzed with one-way ANOVA and Student t-test. The results were as follows: 1. The IDS group showed significantly higher microTBS than DDS group in 3 step total-etch and 2 step self-etch adhesive (p < 0.05). 2. In IDS and DDS group, 3 step total-etch adhesive showed the highest microTBS value, followed by 2 step self-etch, and 1 step self-etch adhesive. In IDS group, the microTBS value for 1 step self-etch adhesive was significantly different from those of the other subgroups (p < 0.05), and in DDS group, there were statistical differences in all subgroup (p < 0.05). 3. Failure modes of tested dentin bonding adhesives were mostly mixed failure and only 1 step self-etch adhesive showed adhesive failure.

Keyword

Immediate dentin sealing; Delayed dentin sealing; Indirect resin composite restoration; Dentin bonding adhesives; Microtensile bond strength

MeSH Terms

Adhesives
Analysis of Variance
Dentin
Humans
Molar
Resin Cements
Sodium Chloride
Tooth
Adhesives
Resin Cements
Sodium Chloride

Figure

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  Figure 1 Experimental groups and sequences

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  Figure 2 Schematic diagram of the specimen preparation for the microtensile bond test

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  Figure 3 Microtensile bond strength of three dentin bonding adhesives according to IDS and DDS. Subgroups under the horizontal line were not significantly different (p > 0.05).

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  Figure 4 Fractured beam in IDS exhibiting failure pattern (× 100) (Left) Mixed failure in a beam of 3 step total-etch SB subgroup was shown (Middle) Mixed failure in a beam of 2 step self-etch SE subgroup was shown. (Right) Adhesive failure in a beam of 1 step self-etch XE subgroup was shown. (D: dentin, AL : adhesive layer)

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  Figure 5 Fractured beam in DDS exhibiting failure pattern (× 100) (Left) Mixed failure in a beam of 3 step total-etch SB subgroup was shown. (Middle) Mixed failure in a beam of 2 step self-etch SE subgroup was shown. (Right) Adhesive failure in a beam of 1 step self-etch XE subgroup was shown. (D : dentin, AL : adhesive layer)

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