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A Study of Light Cured Wax Pattern

光固化蜡模的研究

基本信息

批准号：
04807134
负责人：
KOMATSU Masashi
金额：
$ 1.28万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04807134/
关键词：
Light cured wax pattern Inlay wax Paraffin Carnauba wax Bis-GMA Residue Flow Linear thermal expansion 光重合ワックスパターンミツロウ可視光線強熱残分率

项目摘要

The high viscous light cured wax(HVLW) and the low viscous light cured wax(LVLW) were made experimentally. When it hardens by the irradiation of the 475 nm wave length light, the color of LVLW changes from light green to ocher. There two experimental light cured waxs, conventional inlay waxs and two light cured waxs on the market were tested by the instruction of JIS-6503 or ADA specification No.4. The curing shrinkage and the scratch hardness were also measured.The following results were obtained.1. The light cured waxs are very easy to insert into the prepared cavityby finger pressure, possible to carve the original tooth anatomy in these waxs and at the margins after solldification and have free manipulation time.2. The melted waxs except LVLW vaporized at 500ﾟC have left no solid residue in excess of 0.1% of the original weight when tested according to the instruction of ADA specification No.4.3. The values for flow of the blue and red inlay waxs at 34 to 45ﾟC were increased abruptly and these waxs were thoughrt to reveal comparatively large distortion compared with the low flaw of the light cured wax at these temperature.4. The amount or linear thermal expansion of the light cured waxs is smaller than the conventional blue and red inlay waxs. It is thought to be possible to form and remove the low distortion wax pattern resulted from thermal changes and release or stresses when light cured waxs are used.5. HVLW has a similar touch in carving by the wax carver to the blue inlay wax and this fact is also concluded from the scratch hardness test.6. HVLW showed high shrinkage compared with the conventional blue or red inlay wax. It seems to be difficult to distinguish die material and wax because of its yellow color.Not only the manipulation of the wax but the accuracy of the castings shall be considered. The castings made from these experimental light cured waxs shall be clinically applied to the patients in future.

实验制备了高粘度光固化蜡（HVLW）和低粘度光固化蜡（LVLW）。当其通过475 nm波长的光的照射而硬化时，LVLW的颜色从浅绿色变为赭石。对两种实验用光固化蜡、普通嵌体蜡和两种市售光固化蜡进行了JIS-6503或ADA规范No.4的测试。并对固化收缩率和划痕硬度进行了测试，结果表明：1.光固化后的牙体蜡很容易通过手指按压插入到预备好的牙洞中，固化后的牙体蜡和边缘可以雕刻出原始牙齿的解剖结构，并且有自由操作的时间.当根据ADA规范4.3的说明进行试验时，除LVLW外，在500 ℃下蒸发的熔化蜡没有留下超过原始重量0.1%的固体残留物。蓝色和红色嵌体蜡在34 ~ 45 ℃时的流动值急剧增加，与光固化蜡在此温度下的低缺陷相比，这些蜡显示出相对较大的变形.光固化蜡的量或线性热膨胀小于常规的蓝色和红色嵌体蜡。认为光固化蜡可以形成和去除由于热变化和释放或应力引起的低变形蜡模。HVLW在蜡雕刻师的雕刻中具有与蓝色嵌体蜡相似的触感，这一事实也是从划痕硬度测试中得出的。HVLW与传统的蓝色或红色嵌体蜡相比显示出高收缩率。由于蜡的颜色是黄色的，所以似乎很难区分模具材料和蜡。不仅要考虑蜡的操作，还要考虑铸件的精度。用这些实验性光固化蜡制作的铸件可供临床应用。