INFLUENCE OF APPICATION TIME OF SELF-ETCHING PRIMERS ON DENTINAL MICROTENSILE BOND STRENGTH

Young-Gon Cho; Young-Gon Lee; Jong-Uk Kim; Byung-Cheul Park; Jong-Jin Kim; Hee-Young Choi; Cheul-Hee Jin; Sang-Hoon Yoo

doi:10.5395/JKACD.2004.29.5.430

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Cho, Lee, Kim, Park, Kim, Choi, Jin, and Yoo: INFLUENCE OF APPICATION TIME OF SELF-ETCHING PRIMERS ON DENTINAL MICROTENSILE BOND STRENGTH

Original Article

J Korean Acad Conserv Dent 2004;29(5):430-438.

Published online: 14 January 2004

DOI: https://doi.org/10.5395/JKACD.2004.29.5.430

INFLUENCE OF APPICATION TIME OF SELF-ETCHING PRIMERS ON DENTINAL MICROTENSILE BOND STRENGTH

Young-Gon Cho^*, Young-Gon Lee, Jong-Uk Kim, Byung-Cheul Park, Jong-Jin Kim, Hee-Young Choi, Cheul-Hee Jin, Sang-Hoon Yoo

Department of Conservative Dentistry, College of Dentistry, Chosun 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 Fax : 82-62-232-9064, E-mail: ygcho@mail.chosun.ac.kr

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 evaluated the influence of application time of self-etching primers on microtensile bond strength (μTBS) to dentin using three self-etching primer adhesive systems.

Dentin surfaces were exposed from forty-eight human molars. They were conditioned with three self-etching primers (Clearfil SE Bond [SE], Unifil Bond [UF], Tyrian SPE + One Step Plus [TY]) and different primining times (10s, 20s, 30s and 40s). Composite resins were bonded to dentin surfaces and specimens were made. μTBS was tested and statistically compared using by one-way ANOVA and Tukey’s Test.

The results of this study presented that priming time for 10s in SE and UF groups and for 30s and 40s in TY group was highly decreased μTBS to dentin.

Keywords: Application time, Self-etching primers, Microtensile bond strength, Self-etching primer adhesive systems, Condition, Dentin surface

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Figure 1.

Specimen adhered to the testing apparatus

Figure 2.

EZ test for microtensile bond strength test

Figure 3.

Microtensile bond strength (MPa) of each group according to priming times of three self-etching primer adhesives to dentin

Table 1.

Self-etching primer adhesives, components, pH of primers and manufacturers

Adhesives	Component		pH	Manufacturers
Adhesives	Primer	Bonding agent	pH	Manufacturers
Clearfil SE Bond (SE)	MDP, HEMA, water, hydrophilic DMA, photoinitiator	MDP, HEMA, hydrophilic DMA, microfiller, photoinitiator	1.9	Kuraray Medical Inc., Okayama, Japan

Unifil Bond (UF)	4-MET, HEMA, ethanol, water, initiator	UDMA, HEMA, TEGDMA	2.2	GC Co., Tokyo, Japan

Tyrian SPE + One-Step Plus (TY)	2-acrylamido-2-methyl propanesulfonic acid, Bis (2 methacryloyloxy) ethyl) phosphate, ethanol	BPDM, HEMA, acetone, glass frit, photoinitiator	0.4	Bisco, Inc., Schaumburg, IL, U.S.A.

MDP = 10-methacryloyloxydecyl dihydrogen phophate, DMA = dimethacrylate, HEMA = 2 hydroxyethyl methacrylate, 4-MET = 4-methacryloxyethyl trimellitic acid, UDMA = urethane dimethacrylate, TEGDMA = triethylene glycol dimethacrylate, BPDM = biphenyl dimethacrylate

Table 2.

Microtensile bond strength (MPa) and statistical analysis according to adhesives and priming times

Group	Priming time	Microtensile strength (mean ± S.D.)	Number of specimens
SE group	10 seconds	33.78 ± 7.20^a	20
	20 seconds	73.22 ± 15.10^b	20
	30 seconds	62.80 ± 15.01^b	20
	40 seconds	65.53 ± 18.44^b	20

UF group	10 seconds	22.87 ± 6.53^c	20
	20 seconds	40.04 ± 12.50^d	20
	30 seconds	46.28 ± 9.13^d	20
	40 seconds	41.19 ± 12.00^d,g	20

TY group	10 seconds	47.34 ± 8.19^d,f	20
	20 seconds	53.16 ± 17.95^f	20
	30 seconds	33.98 ± 20.17^a	20
	40 seconds	31.25 ± 13.09^a,g	20

S.D.: Standard Deviation. Superscripts of the same letter indicate values of no statistical significant difference (p > 0.05).

Table 3.

Statistical analysis of mean microtensile bond strength (MPa) at the same priming time

Priming time	Microtensile bond strength	No. of total specimens
10 seconds	34.66 ± 12.40^a	60
20 seconds	55.47 ± 20.42^b	60
30 seconds	47.71 ± 19.42^b,c	60
40 seconds	45.99 ± 20.54^c	60

Superscripts of the same letter indicate values of no statistical significant difference (p > 0.05).

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