EFFECT OF DENTIN SURFACE WETNESS ON TENSILE BOND STRENGTH OF SELF ADHESIVE RESIN CEMENTS

Article information

Restor Dent Endod. 2009;34(2):113-119

Publication date (electronic) : 2009 January 14

doi : https://doi.org/10.5395/JKACD.2009.34.2.113

Sung-Young Yoon , Se-Hee Park , Jin-Woo Kim , Kyung-Mo Cho ^,

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

^*Corresponding Author: Kyung-Mo Cho, Department of Conservative Dentistry College of Dentistry, Kangnung National University, 123 Chibyon-dong Gangwon-do, Korea, Tel: 82-33-640-2470 Fax: 82-33-642-6410 E-mail: drbozon@kangnung.ac.kr

Received 2008 December 31; Revised 2009 February 09; Accepted 2009 February 17.

Abstract

The purpose of this study was to compare the tensile bond strength of several self-adhesive resin cements bonded to dentin surfaces with different wet conditions.

Three self-adhesive resin cements; Rely-X Unicem (3M ESPE, St. Paul, MN, USA), Embrace Wetbond (Pulpdent, Oakland, MA, USA), Maxcem (Kerr, Orange, CA, USA) were used. Extracted sixty human molars were used. Each self-adhesive resin cement was adhered to the dentin specimens (two rectangular sticks from each molar) in different wet conditions.

Tensile bond strength were measured using universal testing machine (EZ Test, Shimadzu corporation, Kyoto, Japan) at a crosshead speed of 1.0mm/min. After the testing, bonding failures of specimens were observed by Operative microscope (OPMI pro, Carl Zeiss, Oberkochen, Germany). T-test was used to evaluate the effect of dentin surface wetness. One-way ANOVA test was used to evaluate the tensile bond strength of self-adhesive resin cements in the same condition. Scheffe's test was used for statistical analyzing at the 95% level of confidence.

The result showed that wetness of dentin surface didn't affect tensile bond strength of self-adhesive resin cements and Maxcem showed the lowest tensile bond strength.

Keywords: Self-adhesive resin cements; Tensile bond strength; Dentin surface wetness

Figure 1.

Specimen preparation for tensile bond strength.

Figure 2.

Schematic drawing of moulds.

Table 1.

Composition of materials used in this study

Table 2.

Handling methods of the resin cement

Table 3.

Means of self-adhesive resin cements according to dentin wetness

Table 4.

Comparison between self-adhesive resin cements on dry group

Table 5.

Comparison between self-adhesive resin cements on wet group

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