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Abstract
本研究は, 吸水および溶解量の少ない可視光線重合型レジンの開発を目的として, シクロホスファゼンモノマー3種および市販モノマー3種を用いて可視光線重合型のアンフィルドレジンを試作し, それぞれの硬化物の水中での吸水量, 溶解量, MeOH中での膨潤量, 溶解量, THF中での膨潤量および機械的性質について検討したものである.その結果, 吸水量は, いずれのモノマーを用いた場合も経時的に増大した.また, 30日間水中浸漬した場合の溶解量は, 4PN-(EMA)_8, 4PN-(TF)_1-(EMA)_7, 4PN-(TF)_2-(EMA)_6, Tri-EDMA, BMPEPPおよびBis-GMA+Tri-EDMAの場合, それぞれ順に0.16, 0.20, 0.51, 0.65, 0.17および0.81%を示した.MeOH中での膨潤量は, Bis-GMA+Tri-EDMAおよび4PN-(TF)_2-(EMA)_6の場合を除き, いずれも経時的に増加する傾向を示した.30日間MeOH中に浸漬した場合の溶解量は, シクロホスファゼンモノマーを用いた場合および市販モノマーを用いた場合, それぞれ0.09〜0.36および1.36〜5.40%を示した.30日間THF中に浸漬した場合の経時的な膨潤量は, シクロホスファゼンモノマーを用いた場合に市販モノマーを用いた場合と比較して小さかった.一方, 圧縮強さは, いずれのモノマーを用いた場合も230〜275MPaを示し, 曲げ強さは, シクロホスファゼンモノマーを用いた場合は, いずれも45MPa以下を示し, 市販モノマーを用いた場合は59〜90MPaを示した.
Studies were done to decrease both the water sorption and solubility of visible light cured resin.As monomer, three kinds of cyclophosphazene monomers and three kinds of commercial monomers were prepared to the visible light cured unfilled resins.When these set products were immersed in water, MeOH and THF, water sorption and solubility in water, MeOH sorption and solubility in MeOH, THF sorption, and mechanical properties were examined.Water sorption was increased by degrees for all the monomers.In the cases of 4PN-(EMA)_8, 4PN-(TF)_1-(EMA)_7, 4PN-(TF)_2-(EMA)_6, Tri-EDMA, BMPEPP and Bis-GMA+Tri-EDMA, the value of solubility in water after 30 days, was 0.16, 0.20, 0.51, 0.65, 0.17 and 0.81% respectively.MeOH sorption showed a tendency to increase, except for Bis-GMA+Tri-EDMA and 4PN-(TF)_2-(EMA)_6.Solubility in MeOH after 30 days, for cyclophosphazene monomers and commercial monomers, was 0.09〜0.36% and 1.36〜5.40%.THF sorption after 30 days, for cyclophosphazene monomers, was small in comparison with that of commercial monomers.Compressive strength was 230〜275MPa in all cases.But, transverse strength, for all the cyclophosphazene monomers, was 45MPa or below.In the cases of commercial monomers, the value of transverse strength was 55〜90MPa.
Journal
- Journal of the Japanese Society for Dental Materials and Devices [List of Volumes]
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Journal of the Japanese Society for Dental Materials and Devices 8(4), 517-524, 1989-07-25 [Table of Contents]
The Japanese Society for Dental Materials and Devices (JSDMD)
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