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Titanium superstructure by a resin pattern material with non-polymerization shrinkage and a thermal expansion typed investments

钛上部结构采用非聚合收缩树脂模型材料和热膨胀型包埋材料

基本信息

批准号：
12671881
负责人：
TAKAHASHI Junzo
金额：
$ 2.3万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12671881/
关键词：
metallic compound ZrC ZrN compensation of casting shrinkage investment for titanium casting accuracy thermal expansion rate surface roughness パターン用レジン重合収縮率インプラントチタン加熱膨張鋳型材鋳造収縮率

项目摘要

Three different chemical substances were added to a liquid component of a self-curing acrylic resin (Pattern Resin, GC).OXO (surfactant), ACMO (monomer) and ESCOURON (coumarone-indene resin) were selected as substances. The addition of 2 wt%-OXO to liquid reduces linear shrinkage to 0.04 %, about 1/3 of the shrinkage of the basic resin.The effect of the addition of various metallic compounds on thermal expansion of an investment (Selevest D) was examined. Then, ZrC and ZrN were selected as additives to the investment. Investments added 3.0, 3.5, 4.0 and 5.0 wt% of ZrC and 5.0, 5.5, 6.0 and 7.0 wt% of ZrN were prepared. All investments showed setting shrinkage of about 0.5%. The thermal expansion of investments increased with the amount of Zr compounds and heating temperature, and remained after cooling at room temperature. The compressive strength of investments decreased with the amount of Zr compounds and firing temperature.Then, pure titanium was cast into these investment-molds, which were fired and cooled down to room temperature.The surface condition of castings into higher firing temperature was better than that into lower firing temperature. The surface roughness increased with the amount of Zr compounds. The casting accuracy of crowns were 0.21% in 3.5wt%ZrC-700℃ (firing temperature), 0.25% in 5.5wt%ZrN-700℃ and 0. 14% in 5.0wt%ZrN-900℃. In 5.0wt%ZrC, titanium cast crowns had fins which was formed as a result of cracks in the investment.The casting accuracy could be controlled by the addition content of Zr compounds. The development of new thermal expansion typed investment for titanium was suggested to be possible.

将OXO（表面活性剂）、ACMO（单体）和ESCOURON（香豆酮-茚树脂）三种不同的化学物质添加到自固化丙烯酸树脂（Pattern Resin，GC）的液体组分中。向液体中加入2wt%的-OXO可使线性收缩率降低到0.04%，约为基础树脂收缩率的1/3。然后，选择ZrC和ZrN作为包埋料的添加剂。制备添加3.0、3.5、4.0和5.0重量% ZrC和5.0、5.5、6.0和7.0重量% ZrN的熔模。所有投资均出现约0.5%的缩水。包埋料的热膨胀随锆化合物含量和加热温度的升高而增大，室温冷却后保持不变。将纯钛浇注到熔模中，焙烧后冷却至室温，发现高烧成温度下的铸件表面状况优于低烧成温度下的铸件表面状况。表面粗糙度随着Zr化合物的量增加而增加。在3.5wt%ZrC-700℃（烧成温度）、5.5wt%ZrN-700℃和0.在5.0wt%ZrN-900℃时，14%。在5.0wt%ZrC中，钛铸造冠有翼片，翼片是由于包埋料中的裂纹而形成的，铸造精度可通过Zr化合物的添加量来控制。提出了研制新型热膨胀型钛包埋料的可能性。