THE EFFECT OF MULTIPLE APPLICATION ON MICROTENSILE BOND STRENGTH OF ALL-IN-ONE DENTIN ADHESIVE SYSTEMS

Sung-Ae Son; Bock Hur

doi:10.5395/JKACD.2004.29.5.423

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Son and Hur: THE EFFECT OF MULTIPLE APPLICATION ON MICROTENSILE BOND STRENGTH OF ALL-IN-ONE DENTIN ADHESIVE SYSTEMS

Original Article

J Korean Acad Conserv Dent 2004;29(5):423-429.

Published online: 14 January 2004

DOI: https://doi.org/10.5395/JKACD.2004.29.5.423

THE EFFECT OF MULTIPLE APPLICATION ON MICROTENSILE BOND STRENGTH OF ALL-IN-ONE DENTIN ADHESIVE SYSTEMS

Sung-Ae Son^*, Bock Hur

Department of Conservative Dentistry, College of Dentistry, Pusan National University

^*Corresponding author: Sung-Ae Son, Department of Conservative Dentistry, College of Dentistry, Pusan National University 1-10 Ami-dong, Seo-gu, Pusan, Korea, 602-739, Tel : 82-51-240-7454, E-mail: song-ae@hanmail.net

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 using confocal laser scanning microscope and microtensile bond strength test. Flat occlusal dentin surfaces were prepared using low-speed diamond saw. In group I, Scotchbond Multipurpose (SM) was applied by manufacturer’s recommendation. In group II, after Adper Prompt L-Pop was applied for 15s and light cured for 10s, the second coat was re-applied and light-cured. In group III, after light-curing the second layer, the third coat was re-applied and light-cured. Specimens bonded with a resin-composite were sectioned into resin-dentin stick for measuring the adhesive layer thickness by confocal laser scanning microscope and evaluating micro-tensile bond strength. The adhesive layers of three-step dentin adhesive system, 3 coats of Adper Prompt L-Pop had significantly thicker than SM, 2 coats of Adper Prompt L-Pop (p < 0.05). However, there was no significant differences in bond strengths between SM and 3 coats of Adper Prompt L-Pop (p > 0.05). And SM, 3 coats of Adper Prompt L-Pop had significantly higher than 2 coats of Adper Prompt L-Pop in bond strengths (p < 0.05).

Keywords: All-in-one dentin adhesive, Micro-tensile bond strength, Confocal laser scanning microscope

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Figure 1.

Confocal micrograph of specimen prepared with Scotchbond Multi-Purpose. The adhesive layer appeared by red color, is continuous across the interface.

Figure 2.

Confocal micrograph of specimen prepared with two application of Adper Prompt L-Pop. The adhesive layer is appeared by red color.

Figure 3.

Confocal micrograph of specimen prepared with three application of Adper Prompt L-Pop. It provides a more thick adheisve interface than 2coats of Adper Prompt L-Pop.

Table 1.

Dentin bonding system used in this study

Dentin bonding agent	Composition
Scotchbond Multi-Purpose	Conditioner - 35% phosphoric acid
	Primer - HEMA, polyalkenoic acid, co-polymer, water
	Adhesive resin - Bis-GMA, HEMA

Adper Prompt L-Pop (composite and compomer version)	Liquid 1 (red blister)
	Methacrylated phosphoric esters
	Bis-GMA
	Initiators based on camphorquinone, Stabilizers
	Liquid 2 (yellow blister)
	Water, 2-HEMA Polyalkenoic acid, Stabilizer

Table 2.

Adhesive system tested in the study and application protocol

Treatment group	Application protocol
Scotchbond Multi-Purpose (SM)	acid etching : 15sec
	washing : 15sec ; dry
	primer application and gently air dry
	adhesive (rhodamine B labeled) and light curing : 20sec

Adper Prompt L-Pop 2 coats (2 coats)	apply scrubbing continuously for 15sec (rhodamine B labeled)
	gently air dry ; light curing for 10sec
	apply consecutive coats without waiting between application
	(rhodamine B labeled)
	gently air dry ; light curing for 10sec

Adper Prompt L-Pop 3 coats (3 coats)	apply second coat
	apply consecutive coats without waiting between application
	(rhodamine B labeled)
	gently air dry ; light curing for 10sec

Table 3.

Thickness of adhesive layer (TAL) and micro-tensile bond strength (MTBS) (Mean ± SD)

Groups	TAL (㎛)	MTBS (MPa)
SM	(n = 51) 62.35 ± 14.71	(n = 30) 20.09 ± 5.19
2 coat	(n = 36) 19.72 ± 5.97	(n = 30) 15.07 ± 4.01
3 coat	(n = 36) 76.25 ± 19.47	(n = 30) 19.26 ± 6.36

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