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

Ji-Deok Moon; Jeong-Kil Park; Bock Hur; Hyeon-Cheol Kim

doi:10.5395/JKACD.2005.30.1.049

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Moon, Park, Hur, and Kim: Microtensile bond strength of all-in-one adhesive to caries-affected dentin

Original Article

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2005; 30(1): 49-57.

Published online: 31 January 2005

DOI: https://doi.org/10.5395/JKACD.2005.30.1.049

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

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 24 December 2004 Accepted 30 December 2004

(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.

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

Figures and Tables

Figure 1

Adhesive failure.

Figure 2

Mixed failure.

Figure 3

Cohesive failure in resin.

Figure 4

Cohesive failure in dentin.

Figure 5

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

Figure 6

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

Figure 7

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

Figure 8

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

Figure 9

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

Figure 10

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

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 2

Adhesive systems tested in the study and application protocol

Table 3

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

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

Table 4

Failure mode

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

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