A STUDY ON THE BOND STRENGTHS OF LIGHT-CURING GLASS IONOMER CEMENTS TO DENTAL AMALGAM

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Journal of the Korean Academy of Pediatric Dentistry 1996;23(2):357-364.
Published online May 31, 1996.

A STUDY ON THE BOND STRENGTHS OF LIGHT-CURING GLASS IONOMER CEMENTS TO DENTAL AMALGAM

광중합 Glass Ionomer Cement와 Amalgam의 결합강도에 관한 연구

정태성

부산대학교 치과대학 소아치과학교실

Abstract

The purpose of this study was to asses the shear bond strengths of 3 types of light-curing Glass Ionomer cement to dental amalgam with or without an intermediary agent. 60 amalgam adherent specimens were prepared and aged in water at 37℃ for 3 days. Before bonding, the amalgam surfaces were finished flat on 600-grit silicon carbide paper. 30 specimens among 60 were used for bonding in this condition, and the other 30 were covered with a thin layer of light-curing intermediary agent. Shear bond strengths were measured with universal testing machine (Instron, Model 4301) and statistically processed by ANOVA and t-test. On completion of bond test, the fracture surfaces were examined under light microscope so that the mode of bond failure could be assessed The results were as follows : 1. Bond strength of Fuji II LC group showed the hightest value and was followed by Vitremer, Vitrebond groups (p<0.05). 2. The bond strengths achieved without an intermediary agent were higher than those obtained with intermediary agent (p<0.05). 3. For the specimens bonded with intermediary agent, bond failures occured mostly at the agent-amalgam interface. So, the use of intermediary bonding agent was thought not recommendable at glass ionomer-amalgam interface.