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Microtensile bond strength of all-in-one adhesive to caries-affected dentin


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Microtensile bond strength of all-in-one adhesive to caries-affected dentin

Article information

Restor Dent Endod. 2005;30(1):49-57
Publication date (electronic) : 2005 January 31
doi : https://doi.org/10.5395/JKACD.2005.30.1.049
Ji-Deok Moon, Jeong-Kil Park, Bock Hur, Hyeon-Cheol Kim
Department of Conservative Dentistry, College of Dentistry, Pusan National University, Korea.
Corresponding author: Hyeon-Cheol Kim. Department of Conservative Dentistry, College of Dentistry, Pusan National University, 1-10 Ami-dong, Seo-gu, Busan, 602-739, Korea. Tel: 82-51-240-7978, golddent@pusan.ac.kr
Received 2004 December 24; Accepted 2004 December 30.

Abstract

The purpose of this study was to evaluate the effect of multiple application of all-in-one dentin adhesive system on microtensile bond strength to caries-affected dentin.

Twenty one extracted human molars with occlusal caries extending into mid-dentin were prepared by grinding the occlusal surface flat. The carious lesions were excavated with the aid of caries detector dye. The following adhesives were applied to caries-affected dentin according to manufacturer's directions; Scotchbond™ Multi-Purpose in SM group, Adper Prompt L-Pop™ 1 coat in LP1 group, 2 coats in LP2 group, 3 coats in LP3 group, Xeno® III 1 coat in XN1 group, 2 coats in XN2 group, and 3 coats in XN3 group. After application of the adhesives, a cylinder of resin-based composite was built up on the occlusal surface. Each tooth was sectioned vertically to obtain the 1 × 1 mm2 sticks. The microtensile bond strength was determined. Each specimen was observed under SEM to examine the failure mode. Data were analyzed with one-way ANOVA.

The results of this study were as follows;

1. The microtensile bond strength values were; SM (14.38 ± 2.01 MPa), LP1 (9.15 ± 1.81 MPa), LP2 (14.08 ± 1.75 MPa), LP3 (14.06 ± 1.45 MPa), XN1 (13.65 ± 1.95 MPa), XN2 (13.98 ± 1.60 MPa), XN3 (13.88 ± 1.66 MPa). LP1 was significantly lower than the other groups in bond strength (p < 0.05). All groups except LP1 were not significantly different in bond strength (p > 0.05).

2. In LP1, there were a higher number of specimens showing adhesive failure. Most specimens of all groups except LP1 showed mixed failure.

Keywords: Caries-affected dentin; Microtensile bond strength; All-in-one adhesive; Failure mode; Multiple application

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Article information Continued

Copyright © 2005 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

Adhesive failure.

Figure 2

Figure 2

Mixed failure.

Figure 3

Figure 3

Cohesive failure in resin.

Figure 4

Figure 4

Cohesive failure in dentin.

Figure 5

Figure 5

SEM photomicrograph of the resin/dentin interface produced by Scotchbond™ Multi-Purpose (× 500).

Figure 6

Figure 6

SEM photomicrograph of the resin/dentin interface produced by Adper Prompt L-Pop™ 1 coat (× 500).

Figure 7

Figure 7

SEM photomicrograph of the resin/dentin interface produced by Adper Prompt L-Pop™ 2 coats (× 500).

Figure 8

Figure 8

SEM photomicrograph of the resin/dentin interface produced by Adper Prompt L-Pop™ 3 coats (× 1000).

Figure 9

Figure 9

SEM photomicrograph of the resin/dentin interface produced by Xeno® III 1 coat (× 500).

Figure 10

Figure 10

SEM photomicrograph of the resin/dentin interface produced by Xeno® III 2 coats (× 500).

Figure 11

Figure 11

SEM photomicrograph of the resin/dentin interface produced by Xeno® III 3 coats (× 500).

Table 1

Dentin bonding systems used in this study

Table 1

Table 2

Adhesive systems tested in the study and application protocol

Table 2

Table 3

Microtensile bond strength (MTBS) (MPa) (mean ± SD)

Table 3

*: There was significant difference among groups by Scheffe's test (p < 0.05).

Table 4

Failure mode

Table 4

Type A : adhesive failure between bonding resin and dentin

Type B : mixed failure (above 50% adhesive failure)

Type C : mixed failure (below 50% adhesive failure)

Type D : cohesive failure in resin

Type E : cohesive failure in dentin