Cast clasp with good biocompatibility made by titanium

钛合金铸造表扣，具有良好的生物相容性

• 批准号: 11671946
• 负责人: TAMAKI Yukimichi
• 金额: $ 1.86万
• 依托单位: SHOWA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11671946/
• 关键词: phosphate-bonded investment; titanium; heat-shock method; cast clasp; surface texture; Co-Cr合金; ヒートショック

The purpose of this study was to investigate the application of titanium as denture material. There were two matters in this research. One was to evaluate the casting surface of titanium with commercial titanium investments. Another was to explore the possibility of heat-shock method when fabricating titanium metal plate. The surface texture of titanium cast was inferior to other dental casting metal. However, the surface of titanium cast obtained from phosphate-bonded investments with silica was obviously rougher than that of obtained from investments without P and SiO_2. In addition, these titanium cast was the almost same surface texture as Co-Cr alloy Thus, it was considered that the quality of titanium cast just depended on mold materials.Furthermore the application of a heat-shock method was also investigated when fabricating titanium cast plate. The heat shock was tried for a commercial titanium casting system (Selecast, selec) including two investments (DM, D) as a duplication and as a mold. The mold according to manufacture's instruction (Step-1), the mold including cluplication without a heat treatment (Step-2) and duplication itself before making the mold (Step-3) were prepared after 30min from mixing and then directly put into the furnace preheated at 850℃. The heat shock was found to be effective for the mold made by Step-1. However, the duplication (Step-3) exploded within a few minutes after placing in the furnace. This explosion was successfully avoided by the preheated temperature under 850℃ or prolonged heat-starting time, but a lot of cracks extended while cooling became the hazard for cast. Furthermore we found that the dry for the mold around 100℃ was useful for the heat shock. These results suggest that the heat shock was effective to eliminate the labor time for this system, but factors affecting such as the preheated temperature and heat-starting time should be considered prior to use.

本研究的目的是探讨钛作为义齿材料的应用。在这项研究中有两个问题。一个是用商业钛包埋料评估钛的铸造表面。二是探索热震法制备钛金属板的可能性。钛铸件的表面纹理不如其他牙科铸造金属。而含二氧化硅的磷酸盐包埋料所获得的钛铸件表面粗糙度明显高于不含P和SiO_2的包埋料。此外，这些钛铸件的表面织构与钴铬合金几乎相同，因此认为钛铸件的质量仅取决于模具材料。此外，还研究了热冲击方法在钛铸件中的应用。对商业钛铸造系统（Selecast，selec）进行了热冲击试验，所述商业钛铸造系统包括作为复制品和作为模具的两种包埋料（DM，D）。在混合30分钟后制备根据制造商说明书的模具（步骤-1）、包括未经热处理的混合物的模具（步骤-2）和在制造模具之前复制的模具（步骤-3），然后直接放入在850℃下预热的炉中。发现热冲击对于通过步骤-1制造的模具是有效的。然而，复制品（步骤3）在放入炉中后几分钟内爆炸。通过预热温度低于850℃或延长启动时间，成功地避免了爆炸，但冷却过程中大量裂纹扩展，对铸件造成危害。此外，我们还发现模具在100℃左右干燥有利于热冲击。这些结果表明，热冲击是有效的，以消除劳动时间为该系统，但影响因素，如预热温度和热启动时间应考虑在使用前。

项目成果

Zhang Z: "Fundamental studies on ammonia-free phosphate-bonded binder for dental investment."昭和歯学会雑誌. 20・2. 322-326 (2000)

张Z：“牙科包埋用无氨磷酸盐结合剂的基础研究”，昭和牙科学会杂志20・2（2000）。

Harun Q: "Labor Reduction for Mold Preparation of a Commercial Titanium Cast Denture System Using a Heat-shock Method."Dental Materials Journal. 19・4. 413-421 (2000)

Harun Q：“使用热激法减少商业钛铸造义齿系统模具制备的劳动力”《牙科材料杂志》19・4 (2000)。

Tamaki Y: "Two-stage Heat-Shock Procedure Can Fabricate Sound Co-Cr Casting Denture Plates by Using Conventional Phosphate-Bonded Investments"昭和歯学会雑誌. 20・2. 149-152 (2000)

Tamaki Y：“两阶段热冲击程序可以使用传统的磷酸盐粘合包埋材料制造良好的钴铬铸造义齿板”昭和牙科学会杂志 20・2（2000 年）。

Ozawa A: "The Possibility of Fabricating Co-Cr casting Plates by Using a Heat-Shock Method with Conventional Phosphate-bonded Investments."昭和歯学会雑誌. 20・2. 153-157 (2000)

Ozawa A：“使用热冲击法和传统磷酸盐粘合包埋材料制造钴铬铸造板的可能性”，昭和牙科学会杂志 20・2（2000 年）。

玉置幸道 他: "Co-Cr鋳造床の短時間鋳造に関する研究"日本歯科技工学会第21回学術大会講演抄録集. 39 (1999)

Yukimichi Tamaki等：“Co-Cr铸造床的短时间铸造研究”日本牙科技术学会第21届学术会议论文集39（1999）。