Read/Search this Article
Abstract
キトサンは生体吸収性である.このキトサンをリンゴ酸あるいはマロン酸で溶解し, キトサンゾルを作る.そして, キトサンゾルにハイドロキシアパタイトを練り込み, 5%ポリリン酸ナトリウムで中和し, ゾルをゲル化してフィルムを作る.このフィルムの中和後と乾燥後の収縮量, 硬さ, 引張強さと伸びは含有するキトサン量によって, どのように影響されるかを検討した.結論は次のようであった.1.リンゴ酸で溶解したキトサンゾルは中和後の収縮量が大きかった.2.乾燥後の収縮量はマロン酸で溶解したキトサンフィルムが大きかった.3.キトサン量が多いと中和後の収縮量が大きくなった.しかし, 乾燥後には差が認められなかった.4.キトサン量が多いと硬さは大きくなった.また, 乾燥後, キトサンフィルムを湿潤した硬さは中和した硬さよりも大きかった.5.引張強さはキトサン量が多いと大きくなった.また, 乾燥後, キトサンフィルムを湿潤した引張強さは中和後のフィルムより大きかった.6.乾燥後, キトサンフィルムを湿潤した伸びは中和後のフィルムよりも小さかった.
Chitosan is absorbed in vivo.Chitosan sol is produced by dissolving chitosan in a solution of malic acid and malonic acid.A chitosan film is formed by mixing this sol with apatite materials, followed by neutralizing with a 5% sodium polyphosphate solution, then gelatinized.In the present study, we examined the relationship between the amount of added chitosan and shrinkage, hardness, tensile strength and elongation.The following results were obtained.:The chitosan sol which was dissolved with malic acid exhibited the largest amount of shrinkage at the neutralization process.The chitosan sol dissolved with malonic acid showed the largest amount of shrinkage during the drying stage.By increasing the amount of chitosan, the shrinkage increased during the neutralization process, but there were no significant changes during the drying stage.Increasing the amount of chitosan resulted in increased hardness.The hardness value of dried chitosan was higher than that of neutralized chitosan.By increasing the chitosan, the tensile strength increased.It was also observed that elongation of the dried chitosan film increased.
Journal
- Journal of the Japanese Society for Dental Materials and Devices [List of Volumes]
-
Journal of the Japanese Society for Dental Materials and Devices 14(5), 484-491, 1995-09-25 [Table of Contents]
The Japanese Society for Dental Materials and Devices (JSDMD)
Share