Studies on the development of new soft resin-based denture for elderly person in need of care

新型老年护理软树脂基义齿的研制

基本信息

批准号：
17592017
负责人：
NAGAI Masahiro
金额：
$ 2.31万
依托单位：
Tokyo Medical and Dental University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17592017/
关键词：
elderly person in need of care resin based denture soft lining on mucous membrane side EHMA-MMA copolymer softness relaxation stress rate ratio of dimensional recovery after compression viscoelasticity 軟らかさ係数硬質軟質レジン複合化構造軟質レジン圧縮

项目摘要

We began development of new soft resin-based denture absorbing mechanical stimulation to a mucous membrane under denture, which was comfortable to an elderly person. First a copolymer of 2-ethylhexyl methacrylate (EHMA) and methyl methacrylate (MMA) was selected especially, and it was suggested that the copolymer might have a mechanical effect by preliminary compression tests. Secondly, modulus of softness, relaxation stress rate and ratio of dimensional recovery after compression to be necessary for soft resin for lining were investigated by test method devised in this study. As a result, the modulus of softness exponentially increased when the EHMA composition ratio exceeded 80%. As for the relaxation stress rate, a satisfied value was shown in range of more than EHMA 60%. As for the ratio of dimensional recovery, copolymers of EHMA 60% and 70% showed behavior of elastic recovery, whereas copolymers of EHMA 80%, 90% and 100% showed behavior of viscoelastic recovery. However, copolyme … More rs of more than EHMA 80% showed the ratio of dimensional recovery of about 100% after 30 second. Therefore, we judged that such the delay was clinically no problem. In this manner, the EHMA effect was recognized. As application, upper and lower complete denture was made for trial. The method is as follows. Beforehand, EHMA-MMA sheet was adapted to plaster model of an alveolar ridge by heating at 70℃. After packed resin dough to upper curing flask at final stage of denture method, the formed EHMA-MMA sheet was applied to mucous membrane side of denture. And the curing flask was set to flask retainer, and the EHMA-MMA soft resin-based denture was polymerized at 70℃. By the way, the interface between an acrylic resin and EHMA-MMA sheet were chemically bonded. Consequently, as the soft resin-based denture having viscoelastic property was able to disperse and relax a force of mastication through denture, It was expected very much that a patient might be able to evade a pain of mucous membrane. Less

我们开始开发新的基于软树脂的牙齿吸收机械刺激，从牙齿下的粘膜开发，这对老年人来说很舒适。首先，特别选择了2-乙基己基甲基丙烯酸酯（EHMA）和甲基丙烯酸甲酯（MMA）的共聚物，并建议共聚物通过初步压缩测试具有机械效应。其次，通过在本研究中设计的测试方法研究了柔软度，弛豫应力率和压缩后尺寸恢复的比率。结果，当EHMA组成比超过80％时，柔软度的模量成倍增加。至于松弛应力率，满足的值在超过EHMA的范围内显示了60％。至于尺寸恢复的比率，EHMA 60％和70％的共聚物显示出弹性恢复的行为，而EHMA的共聚物80％，90％和100％显示出粘弹性恢复的行为。但是，共聚物…多于EHMA 80％的Rs显示出30秒后的尺寸回收率约为100％。因此，我们认为这种延迟在临床上没有问题。以这种方式，识别出EHMA效应。随着应用，上层和下部密度进行试验。该方法如下。事先，EHMA-MMA纸通过在70℃处加热来适应Alloolar Ridge的石膏模型。在牙科方法的最后阶段挤满了树脂面团到上固化烧瓶后，将形成的EHMA-MMA纸应用于牙科的粘膜侧。并且固化瓶设置为烧瓶固定剂，EHMA-MMA软树脂基牙科在70℃下聚合。顺便说一句，将丙烯酸树脂和EHMA-MMA片之间的界面化学键合。因此，由于具有粘弹性特性的基于软树脂的牙科能够通过牙科分散和放松乳胶力，因此非常期望患者可能能够避免粘膜的疼痛。较少的