THE CHANGE OF ADAPTABILITY CHANGE IN ADHESIVE SYSTEMS TO DENTIN SUBSTRTE ACCORDING TO STORAGE TIME

Young-Gon Cho; Il-Hwan Ban; Mi-Kyung Yu

doi:10.5395/JKACD.2005.30.3.204

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Cho, Ban, and Yu: THE CHANGE OF ADAPTABILITY CHANGE IN ADHESIVE SYSTEMS TO DENTIN SUBSTRTE ACCORDING TO STORAGE TIME

Original Article

J Korean Acad Conserv Dent 2005;30(3):204-214.

Published online: 14 January 2005

DOI: https://doi.org/10.5395/JKACD.2005.30.3.204

THE CHANGE OF ADAPTABILITY CHANGE IN ADHESIVE SYSTEMS TO DENTIN SUBSTRTE ACCORDING TO STORAGE TIME

Young-Gon Cho¹, Il-Hwan Ban¹, Mi-Kyung Yu²

¹Department of Conservative Dentistry, College of Dentistry, Chosun University

²Department of Conservative Dentistry, School of Dentistry, Chonbuk National University

^*Corresponding author: Young-Gon Cho, Department of Conservative Dentistry, College of Dentistry, Chosun University 421 Seosuk-dong, Dong-gu, Gwangju, Korea, 501-825, Tel: 82-62-220-3840, 3845 Fax: 82-62-232-9064, E-mail: ygcho@mail.chosun.ac.kr

Received 6 January 2005 Revised 18 February 2005 Accepted 5 March 2005

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

This study compared the microtensile bond strength (μTBS) and microscopic change of two 2-step and two 1-step self-etching adhesives to dentin according to storage times in distilled water.

Occlusal dentin was exposed in 48 human molars. They were divided to four groups by different adhesives: SE Bond group (Clearfil SE Bond), AdheSE group (AdheSE), Adper group (Adper Prompt L-Pop), and Xeno group (Xeno III). Each group was stored in 37℃ distilled water for 1, 15, and 30 days.

Resin-bonded specimens were sectioned into beams and subjected to μTBS testing with a crosshead speed of 1 mm/minute. For SEM observation, one specimen was selected and sectioned in each group after each stroage time. Resin-dentin interface was observed under FE-SEM.

In all storage times, mean μTBS of SE group was significantly higher than those of other groups (p < 0.05). There was no significant difference between mean μTBS of SE group and AdheSE group among all storage times, but significant difference between 1- and 30-day storage in mean μTBS of Adper group and Xeno group (p < 0.05). For 1-and 15-day storage, all groups showed the close adaptation between resin-dentin interfaces. For 30-day storage, resin-dentin interfaces showed wide gap in Adper group and separate pattern in Xeno III group.

Keywords: Microtensile bond strength, Microscopic adaptability change, 2-step and 1-step self-etching adhesive, Storage time

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Figure 1.

Histogram showing microtensile bond strengths for each group to dentin according to storage times in distilled water.

Figure 2.

SEM photographs showing the close adaptation of dentin-resin interface produced by Clearfil SE Bond (SE), AdheSE (AD), Adper Prompt L-Pop (LP), and Xeno III (XE) after 1-day distilled water storage (× 1000).

Figure 3.

SEM photographs showing the close adaptation of dentin-resin interface produced by Clearfil SE Bond (SE), AdheSE (AD), Adper Prompt L-Pop (LP), and Xeno III (XE) after 15-day distilled water storage (× 1000).

Figure 4.

SEM photographs showing the close adaptation of dentin-resin interface produced by Clearfil SE Bond (SE) and tiny gap between dentin and resin interface produced by AdheSE (AD) after 30-day distilled water storage (× 1000).

Figure 5.

SEM photographs showing wide gap between the dentin-resin interface produced by Adper Prompt L-Pop (LP), and separate pattern between the interface of resin and adhesive layer produced by Xeno III (XE) after 30-day distilled water storage (× 1000).

Table 1.

The components and pH of two- and one-step self-etching adhesives and composites used

Adhesives	Components	pH	Composites	Manufacturers
Clearfil SE Bond	Primer: MDP, HEMA, water
	DMA, initiator Bond: MDP, HEMA, DMA,	1.9	Clearfil AP-X	Kuraray Medical Inc., Okayama, Japan
	microfiller, initiator

AdheSE	Primer: DMA, phosphonic
	acid acrylate, initiator Bond: HEMA, DMA, silicone	1.5	Tetric Ceram	Ivoclar Vivadent AG, Schann, Liechtenstein
	dioxide, initiator

Adper Prompt L-Pop	Red blister: Methacrylated
	phosphoric ester, Bis-GMA, CQ, stabilizer Yellow blister: water, HEMA, polyalkenoic acids,	1.3	Filtek Supreme	3M ESPE Dental Products, St. Paul, MN, U.S.A.
	stabilizer

Xeno III	Liquid A: HEMA, water, ethanol,
	BHT, nanofiller Liquid B: Pyro-EMA, PEM-F,	1.0	Spectrum TPH	Dentsply DeTrey GmbH, Konstanz, Germany
	UDMA, BHT, EPD, CQ

MDP = 10-methacryloyloxydecyl dihydrogen phosphate, HEMA = 2 hydroxyethyl methacrylate, DMA = dimethacryl-ate, Bis-GMA = Bisphenol glycidyl methacrylate, CQ = camphoroquinone, Pyro-EMA = tetramethacryloxyethyl pyrophosphate, PEM-F = pentamethacry loxyethyl cyclophophazen mono fluoride, UDMA = urethane dimethacrylate, BHT = 2,6-Di-tert-butyl-p hydroxyl toluene, EPD = p-dimethylamino ethyl benzoate.

Table 2.

Mean microtensile bond strengths (MPa) of each group to dentin according to storage times in distilled water

Group	ｕTBS (mean ± S.D.)			No. of Specimens
Group	1 day	15 days	30 days	No. of Specimens
SE Bond	31.37 ± 4.32^a	31.32 ± 5.54^a	28.65 ± 5.34^a	20
AdheSE	20.31 ± 8.43^b	18.00 ± 6.72^b	17.64 ± 5.35^b,c	20
Adper	18.64 ± 5.47^b	15.20 ± 4.89^b,c	13.99 ± 7.20^c,d	20
Xeno III	21.80 ± 6.41^b	20.58 ± 8.29^b	14.96 ± 5.39^c	20

Superscripts of the other letter indicate values of statistical significant difference by Tukey test (p < 0.05).

S.D.: Standard Deviation

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