Journal List > J Korean Acad Conserv Dent > v.34(2) > 1056345

Kim, Kim, and Cho: Effect of curing methods of resin cements on bond strength and adhesive interface of post

Abstract

The purpose of this study was to compare the effect of curing methods of adhesive resins and resin cements in the root canal. Crown portions of 32 single-rooted mandibular premolars were removed. Routine endodontic treatment was done, and 9 mm deep post spaces were prepared within root canals. No. 3 FRC Postec posts (Ivoclar-Vivadent AG, Liechtenstein) were cemented in the post spaces by self-(SC) or light-curing (LC) using two dual-cured adhesives (Adper Scotchbond multi-purpose plus and Exite DSC )and resin cements (RelyX ARC and Variolink II). They were assigned to 4 groups (n=8); R-SC, R-LC, V-SC, V-LC group.
After stored in distilled water for 24 hours, each root was transversally sectioned with 1.5 mm thick and made three slices. The specimens were subjected to push-out test in a universal testing machine (EZ Test, Shimadzu Co., Japan) with a crosshead speed of 1 mm/min. The data were analyzed with repeated ANOVA and one-way.
ANOVA. Also the interface of post-resin cement and resin cement-canal wall of each group was observed under FE-SEM.
When fiber posts were cemented into the root canal using total-etch adhesives, the bond strength and adaptation between post and root canal dentin was affected by curing method. Self-cure of adhesives and resin cements showed higher bond strength and closer adaptation than light-cure of them.

Figures and Tables

Figure 1
Apparatus designed for push-out test
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Figure 2
R-SC group(×300). P: post, C: resin cement, RD: root dentin
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Figure 3
R-SC group(×1,000). P: post, C: resin cement
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Figure 4
R-SC group(×1,000). C: resin cement, RD: root denti
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Figure 5
R-LC group(×300). P: post, C: resin cement, RD: root dentin
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Figure 6
R-LC group(×1,000). P: post, C: resin cement
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Figure 7
R-LC group(×1,000). C: resin cement, RD: root dentin
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Figure 8
V-SC group(×300). P: post, C: resin cement, RD: root dentin
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Figure 9
V-SC group(×1,000). P: post, C: resin cement
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Figure 10
V-SC group(×1,000). C: resin cement, RD: root dentin
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Figure 11
V-LC group(×300). P: post, C: resin cement, RD: root dentin
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Figure 12
V-LC group(×1,000). P: post, C: resin cement
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Figure 13
V-LC group(×1,000). C: resin cement, RD: root dentin
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Table 1
Resin cements and adhesive systems
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Table 2
Group classification and procedures for post cementation
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R: RelyX ARC, V: Variolink II, SC: Self-Cure, LC: Light-Cure, PR: Post Room

Table 3
Push-out strength (MPa) and statistical comparison
jkacd-34-103-i003

R: RelyX ARC, V: Variolink II, SC: Self-Cure,LC: Light-Cure Same superscript is not statistically different (p > 0.05).

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