Construction of the dental attachment manufacturing system made from the Fe-Pt-Nb magnetic alloy by CAD/CAM

利用CAD/CAM构建Fe-Pt-Nb磁性合金牙科附着体制造系统

基本信息

批准号：
14370624
负责人：
KASAHARA Shin
金额：
$ 8.64万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

项目摘要

New prosthetic appliances composed of outer and inner crowns, each made of Fe-39.5mol%Pt-0.75mol%Nb magnetic alloy and magnetic stainless steel, have been developed. The Fe-Pt-Nb magnet has high energy product almost equivalent to the Sm-Co magnet, and excellent corrosion resistance. Kanno et al. showed the possibility of dental casting of the Fe-Pt magnet alloy. However, there remains a problem that the magnetic properties of the Fe-Pt-Nb magnetic alloy are very sensitive to the thermal history of the casting process.Good grindability is desirable in magnetic alloys for clinical use. Furthermore, if the magnetic alloys could be readily machined by a dental CAD/CAM system, it would be possible to avoid problems related to melting the material, which are inevitable when casting. In this study, the grindability of the cast Fe-Pt-Nb magnetic alloy and the magnetic stainless steel was evaluated and compared with that of conventional dental casting alloys. Furthermore, using the integral el … More ement method, the 3-dimensional magnetic field of the outer and inner cap model were analyzed to determine the optimal method for the design and magnetization of removable crown and bridge system made of the Fe-Pt magnet.CONCLUSION1. There was no significant difference in the grinding rate between the solution treated and aged Fe-Pt-Nb magnetic alloys at 500 m min^<-1>. However, the grinding rate of aged Fe-Pt-Nb magnetic alloy was significantly lower at the higher grinding speeds.2. It was found that the grinding rate of the aged Fe-Pt-Nb magnetic alloy and the stainless steel were higher than those of conventional casting alloys at lower speed.3. When the thickness of outer cap top was 1.5mm and the length of outer cap side was 4.0-3.5mm, the optimum attractive force were obtained clinically.4. The attractive force of model-1 was more excellent than that of model-2.5. When the occlusal vertical dimension of the molar was low, it was suggested that the thickness of outer cap top was more important than the length of outer cap side in both models. Less

已经开发了由Fe-39.5mol％PT-0.75mol％NB磁合金和磁性不锈钢制成的新型假体电器，每台由外部和内冠组成。 Fe-PT-NB磁铁的高能量几乎等于SM-CO磁铁，并且具有出色的耐腐蚀性。 Kanno等。显示了Fe-PT磁铁合金牙齿铸造的可能性。但是，仍然存在一个问题：Fe-PT-Nb磁合金的磁性特性对铸造过程的热历史非常敏感。在临床使用的磁合金中，磨损性是可取的。此外，如果磁合金可以通过牙齿CAD/CAM系统很容易加工，则可以避免与熔化材料有关的问题，这在铸造时是不可避免的。在这项研究中，评估了Cast Fe-Pt-Nb磁合金和磁不锈钢的磨损性，并将其与常规牙齿铸造合金进行了比较。此外，使用积分EL…更多的元素方法，分析了外部和内部盖模型的3维磁场，以确定由Fe-PT Magnet.Conclusion.Conclusion.Conclusion.Conclusion.Conclusion1的设计和磁化的最佳方法。在500 m min^<-1>的溶液处理和老化的Fe-pt-Nb磁合金之间的研磨速率没有显着差异。但是，在较高的研磨速度下，老化的Fe-PT-NB磁合金的研磨速率显着降低。2。发现年龄的Fe-PT-NB磁合金和不锈钢的研磨速率高于以较低速度的常规铸造合金的研磨速率3。当外帽顶部的厚度为1.5mm，外盖侧的长度为4.0-3.5mm时，临床上获得了最佳吸引力。4。 Model-1的吸引力比Model-2.5的吸引力更出色。当磨牙的咬合垂直尺寸较低时，建议外盖顶部的厚度比这两种模型的外帽侧的长度更重要。较少的