Effects of activators contained in adhesives on dentin bond strengths

Hye-Kyung Kang; Joo-Hee Shin; Kyu-Won Suh; Jae-Jun Ryu

doi:10.4047/jkap.2008.46.5.511

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Kang, Shin, Suh, and Ryu: Effects of activators contained in adhesives on dentin bond strengths

ORIGINAL ARTICLE

J Korean Acad Prosthodont 2008;46(5):511-519.

Published online: NaN December 2008

DOI: https://doi.org/10.4047/jkap.2008.46.5.511

Effects of activators contained in adhesives on dentin bond strengths

Hye-Kyung Kang, DDS¹, Joo-Hee Shin, MSD, DDS, PhD², Kyu-Won Suh, MSD, DDS, PhD³, Jae-Jun Ryu, MSD, DDS, PhD^3,

^¹Graduate student, Department of Esthetic Restorative Dentistry, Graduate School of Clinical, Korea

^²Clinical Assistant Professor, Restorative Dentistry, Korea University Medical Center, Korea

^³Professor, Department of Esthetic Restorative Dentistry, Korea Universitry, Graduate School of Clinical, Korea

Corresponding Author: Jae-Jun Ryu Korea University Ansan Hospital, Gojan 1-Dong, Danwon-Gu, Gyunggi-Do, 152-707, Korea Tel.: +82 31 412 5370 E-mail: koprosth@unitel.co.kr

Received 27 June 200817 July 2008 Accepted 27 August 2008

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

Statement of problem

An incompatibility between the initiator systems of self-curing composite resins and light-curing adhesives was supposed recently.

Purpose

The purpose of the study was to evaluate the influence of activators for self/dual bonding on dentin shear bonding strengths.

Material and methods

Fifty human molars were divided into 5 groups. A flat dentin surface was created for each tooth. A self-curing composite resin (Luxacore) was bonded with the following adhesives (n = 10); One-Step, Prime&Bond NT, AdheSE, Prime&Bond NT and AdheSE were also used in combination with activators. Shear bond strengths were measured after 24 hours of water storage. The specimens were loaded in shear in the Instron until failure at a 1 mm/min crosshead speed. Data were compared using one-way ANOVA and Tukey HSD test (α = 0.05).

Results

The dentin adhesive systems in order of decreasing median bond strength were One-Step > Prime&Bond NT with activator, AdheSE with activator > Prime&Bond NT, AdheSE. Among adhesives, One-Step had the highest bond strength. Prime&Bond NT with activator had higher bond strengths than Prime&Bond NT that was used alone, and so was AdheSE.

Conclusion

Shear bond strengths were increased in Prime&Bond NT and AdheSE when these were used with activators comparing used without activators. But using activators was not effective clinically comparing One-Step. (J Kor Acad Prosthodont 2008;46:511-9).

Keywords: Activator, Self-cure composite resin, Adhesive, Chemical incompatibility

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Fig. 1.

Prepared specimen.

Fig. 2.

Prepared specimen with resin core.

Fig. 3.

Shear bond strength. The horizontal line in the box represents the median. The box includes 50%. In box plots, vertical single line represents maximum value and minimum value.

Table I.

Materials selected for the study

	Products	Manufacturer
Dental adhesive agent	One-Step	Bisco, Schaumburg, USA
	Prime&Bond NT	Dentsply, Milford, USA
	AdheSE	Ivoclar Vivadent, Schaan, Liechtenstein
Etching	ETCH-37	Bisco, Schaumburg, USA
Self-cure core	Luxacore	DMG, Hamburg, Germany

Table II.

Composition of dental adhesive

Bonding system	Components	Ingredients
One-Step	Bonding	Bisphenyl dimethacrylate Hydroxyethyl methacrylate Acetone
Prime&Bond NT	Bonding	Di-/tri-methacrylate resin Nanofillers-Amorphous Silicon Dioxide Dipentaerythritol penta acrylate monophosphate
	Activator	Aceton Aromatic sodium sulfinate Self-cure initiator Acetone, Ethanol
AdheSE	Self-etching primer	Phosphonic acid acrylate Bis-acrylamide, water Initiators, stabilizers
	Bonding	HEMA, Dimethacrylate Silicon dioxide Initiators, Stabilizers
	Activator	Initiators, Solvents

Table III.

Group classification

Group (Code)	Dentin adhesive
Control (OS)	One-Step
Exper.1 (PB)	Prime&Bond NT
Exper.2 (PBA)	Prime&Bond NT + activator
Exper.3 (AS)	AdheSE
Exper.4 (ASA)	AdheSE + activator

Table IV.

Shear bond strength

Group	Shear bond strength^∗(MPa)	No. of specimen
OS	18.6 ± 4.07^A	10
PB	5.9 ± 3.32^C	10
PBA	10.3 ± 1.59^B	10
AS	6.0 ± 1.90^C	10
ASA	10.2 ± 2.98^B	10

^∗ Values are means and standard deviations. Groups containing the same letter superscript are not statistically different.

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