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

Article information

Restor Dent Endod. 2005;30(3):204-214

Publication date (electronic) : 2005 January 14

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

Young-Gon Cho ¹, Il-Hwan Ban ¹, Mi-Kyung Yu ²

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 2005 January 06; Revised 2005 February 18; Accepted 2005 March 05.

Abstract

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

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

Table 2.

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

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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.

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

Figure 2.

Figure 3.

Figure 4.

Figure 5.

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