Micro-shear bond strength to dentin under simulated pulpal pressure

Yun-Jung Song; Sung-Ho Park

doi:10.5395/JKACD.2004.29.4.339

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Song and Park: Micro-shear bond strength to dentin under simulated pulpal pressure

Original Article

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2004; 29(4): 339-345.

Published online: 31 July 2004

DOI: https://doi.org/10.5395/JKACD.2004.29.4.339

Micro-shear bond strength to dentin under simulated pulpal pressure

Yun-Jung Song, Sung-Ho Park

Department of Conservative Dentistry, College of Dentistry, Yonsei University, Korea.

Corresponding author: Sung-Ho Park. Department of Conservative Dentistry, College of Dentistry, Yonsei University, 134 Shinchon-Dong, Seodaemoon Gu, Seoul, Korea, 120-752. Tel: 82-2-361-8709, Fax: 82-2-313-7575, sunghopark@yumc.yonsei.ac.kr

(open-access):

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

The aim of this study was to measure and compare the micro shear bond strengths of the following dentin bonding systems to the dentin surfaces under simulated pulpal pressure; All Bond 2®, Second®, AdheSE®, Adper Prompt L-Pop®. The occlusal surfaces of 180 extracted human molars were prepared so the dentin bonding surfaces could be exposed. The teeth were randomly assigned to 3 equal groups of 60 each and subdivided. The dentin surfaces were treated with the above mentioned bonding system and resin composite cylinders were built up under a simulated pulpal pressure when saline (Group II) or diluted bovine serum (Group III) was used as the pulpal fluid. As a control, the same procedures were performed in the dried dentin surfaces (Group I). After one day of storage in water, the micro shear bond strengths were measured using an EZ tester. Group II and III showed significantly lower shear bond strength than Group I statistically (p < 0.05). SEbond® and AdheSE® showed no difference among the different dentin condition. In the Adper Prompt L-Pop®, a simulated pulpal pressure were applied to the specimens using diluted bovine serum, which showed a higher strength than the specimens in which saline was used (p < 0.05).

Keywords: Micro-shear bond strength, Pulpal pressure

Figures and Tables

Figure 1

Simulation of pulpal pressure

Figure 2

Tooth slice and specimen hole

Figure 4

Micro-shear bond strength of dentin adhesive systems

^*statistically significant (p < 0.05)

Table 1

Materials used in the present study

Table 2

Micro-shear bond strength (MPa)

(Mean ± Standard deviation)

^*statistically significant (p < 0.05)

Table 3

Two-way ANOVA between the surface conditions and dentin bonding systems

^*F-value was significant at the 95% level of confidence.

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