Development of new method for root canal filling using the shape memory polymer

使用形状记忆聚合物开发根管充填新方法

• 批准号: 14571818
• 负责人: TSUKADA Gakuji
• 金额: $ 2.24万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14571818/
• 关键词: shape memory polymer; trans polyisoprene; root canal filling material; sealing test; 根管充填材; 形状記憶

The shape memory polymer was produced by using the closs-linked gutta percah (trans polyisoprene). The Sulfur and Dicumyl peroxide were compounded for cross-linking agent, Zinc oxide and Stearic acid were compounded for cross-linking promoter. The mechanism of shape memory for closs-linked gutta percah was proved following. The test specimen that was memorized for original shape by cross-linking could be deformed easily by heating at over the transition temperature. This deformed specimen was cooled at under the transition temperature and the shape of specimen was fixed by crystallization by trans polyisoprene. The fixed shape could restore to original shape by means of the heating at over the transition temperature. This behavior was according to the melting of the crystallization of trans polyisoprene. The restoration temperature could be adjusted by the addition of cis polyisoprene or cross-linking agent. And the restoration temperature could be established at under the intra-oral temperature. As addition of the cross-linking agent increased the elastic modulus increased, and as addition of the cis polyisoprene increased the elastic modulus decreased. The point for root canal filling was produced by using the shape memory polymer and the sealing test was conducted using it. The canal for filling was used glass tube, root canal for bovine tooth and artificial root canal produced by acryl. The sealing test for glass tube using the shape memory polymer was shown superior sealing for eighteen months. The sealing test using the shape memory polymer was shown to be more superior to that using the vertical condensation method. The sealing test using the shape memory polymer for the artificial root canal which was enlarged by using #130 reamer was showed to be superior sealing.

通过使用Closs连接的Gutta Percah（反式聚异丙烯）产生形状记忆聚合物。将硫和双氨基氧化物化合物用于交联剂，氧化锌和硬脂酸的复合物复合以进行交联启动子。遵循了链接的Gutta Percah的形状记忆机制。通过在过渡温度上加热来轻松变形，通过交联对原始形状进行记忆的测试标本。该变形的试样在过渡温度下冷却，并通过反式聚异丁烯结晶固定样品的形状。固定形状可以通过在过渡温度下的加热来恢复原始形状。这种行为是根据反式多异丙晶体结晶的融化。可以通过添加顺式聚苯烯或交联剂来调节恢复温度。并且可以在口腔内温度下建立恢复温度。随着交联剂的添加增加，弹性模量增加了，随着顺式多硅酸盐的添加增加了弹性模量的降低。通过使用形状内存聚合物来产生根管填充的点，并使用它进行密封测试。用于填充的运河被使用玻璃管，牛牙齿的根管和由丙烯酸产生的人造根管。使用形状记忆聚合物的玻璃管密封测试显示了十八个月的优质密封。使用形状存储聚合物的密封测试显示，使用垂直冷凝法更优于该测试。使用＃130铰刀扩大的人造根管的形状存储聚合物的密封测试显示为优质密封。

项目成果

特許権

专利权

• 发表时间: 2018