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Microtensile bond strength of self-etching and self-adhesive resin cements to dentin and indirect composite resin


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Microtensile bond strength of self-etching and self-adhesive resin cements to dentin and indirect composite resin

Article information

Restor Dent Endod. 2010;35(2):106-115
Publication date (electronic) : 2010 March 31
doi : https://doi.org/10.5395/JKACD.2010.35.2.106
Jae-Gu Park1, Young-Gon Cho1, Il-Sin Kim2
1Department of Conservative Dentistry, College of Dentistry, Chosun University, Gwangju, Korea.
2Department of Dentistry, Graduated School of Chonnam National University, Gwangju, 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 2010 February 01; Revised 2010 February 23; Accepted 2010 March 11.

Abstract

The purpose of this study was to evaluate the microtensile bond strength (µTBS), failure modes and bonding interfaces of self-etching and three self-adhesive resin cements to dentin and indirect composite resin.

Cylindrical composite blocks (Tescera, Bisco Inc.) were luted with resin cements (PA: Panavia F 2.0, Kuraray Medical Inc., RE: RelyX Unicem Clicker, 3M ESPE., MA: Maxem, Kerr Co., BI: BisCem, Bisco Inc.) on the prepared occlusal dentin surfaces of 20 extracted molars. After storage in distilled water for 24 h, 1.0 mm × 1.0 mm composite-dentin beams were prepared. µTBS was tested at a cross-head speed of 0.5 mm/min. Data were analyzed with one-way ANOVA and Tukey's HSD test. Dentin sides of all fractured specimens and interfaces of resin cements-dentin or resin cements-composite were examined at FE-SEM (Field Emission-Scanning Electron Microscope).

In conclusion, PA and RE showed higher bond strength and closer adaptation than MA and BI when indirect composite blocks were luted to dentin using a self-etching and three self-adhesive resin cements.

Keywords: Microtensile bond strength; Self-etching resin cement; Self-adhesive resin cement; Dentin; Indirect composite resin

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Article information Continued

Copyright © 2010 Korean Academy of Conservative Dentistry

Figure 1

Figure 1

SEM micrograph of dentin side showing a representative cohesive failure within Panavia F 2.0 (× 130).

Figure 2

Figure 2

SEM micrograph showing remnant fractured filler (F) and cement (C) on the surface of fractured Panavia F 2.0 (× 5,000).

Figure 3

Figure 3

SEM micrograph of dentin side showing a representative mixed failure with a thin layer of RelyX Unicem Clicker on the dentin surface (× 130).

Figure 4

Figure 4

SEM micrograph of dentin side showing a representative adhesive failure of Maxcem along dentin surface (× 130).

Figure 5

Figure 5

SEM micrograph showing remnant a few small sized filler (F) and cement (C) on the dentin surface and fractured Maxem (× 5,000).

Figure 6

Figure 6

SEM micrograph of dentin side showing a representative adhesive failure of BisCem along dentin surface (× 130).

Figure 7

Figure 7

SEM micrograph showing gap (G), about 5 µm wide, between the composite resin (R)-Panavia F 2.0 (P), and close adaptation with numerous short and long resin tags between the Panavia F 2.0-dentin (D) (× 600).

Figure 8

Figure 8

SEM micrograph showing wide gap (G), about 70 µm wide, between the composite resin (R)-RelyX Unicem Clicker (RU), and close adaptation with a few short resin tags between RelyX Unicem Clicker-dentin (D) (× 600).

Figure 9

Figure 9

SEM micrograph showing wide gap (G), about 60 µm wide, between the composite resin (R)-Maxcem (M), and discontinuous 1-2 µm wide gaps(g) between Maxem-dentin (D) (× 600).

Figure 10

Figure 10

SEM micrograph showing gap (G), about 15 µm wide, and a few short resin tags between BisCem (B)-dentin (D) (× 600).

Table 1

Resin cements

Table 1

Table 2

Composition of resin cements

Table 2

HEMA: 2-hydroxyethly methacrylate, 10-MDP:10-methacryloyloxydecyl dihydrogen phosphate, 5-NMSA: N-methacryloyl 5-aminosalicylic acid, GPDM: glycerol dimethacrylate dihydrogen phosphate; CQ: camphorquinone.

Table 3

Mean microtensile bond strength (MPa) to dentin and failure mode

Table 3

PA; Panavia F 2.0, RE; RelyX Unicem Clicker, MA; Maxem, BI; BisCem

Superscripts of the same letter indicate values of statistically no significant difference by one-way ANOVA and Tukey's HSD test.