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KMID : 0376319990110010195
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Dental Journal of CNU
1999 Volume.11 No. 1 p.195 ~ p.204
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THE STUDY ON THE PHYSICAL PROPERTY OF THE PERMANENT SOFT DENTURE LINERS
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Abstract
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This study was performed to evaluate the tensile bond strength and modulus of elasticity of three permanent soft denture liners (Molloplast Be, Ufi Gel C, Tokuyamae) before and after thermocycling. And their water sorption were also evaluated.
Each soft denture liner was bonded to PMMA denture base resin blocks and the tensile bond strength and modulus of elasticity were measured by using universal testing machine. For the water sorption, weight measured after immersion of soft denture liners in 37 1 C water bath for 4 weeks.
The results were as follows :
1. ´Molloplast Be had the highest tensile bond strength, while Tokuyama had the lowest tensile bond strength. There was no significant difference between Tokuyama and Molloplast Be in the both nonthermocycling and thermocycling. There was significant difference in tensile strength of Tokuyama before and after thermocycling(p<0.05).
2. For the modulus of elasticity, there was no significant difference between Ufi Gel Ce and Tokuyama in the both nonthermocycling and thermocycling. There was significant difference in modulus of elasticity of Tokuyama before and after thermocycling(p<0.05).
3. The failure modes of Molloplast Be and Ufi Gel C were mainley adhesive type and that of Tokuyama was mainly mixed type in case of nonthermocycling and cohesive type after thermocycling.
4. The water sorption of each soil liners was within 2% in times(p<0.05) but, there was no significant difference among the: soft liners in times.
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KEYWORD
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