Shimakura Michio, Nagata Tomohisa, Takeuchi Misao, Nemoto Toru
Department of Prosthodontics, Ohu University, School of Dentistry, 31-1 Misumido, Tomitamachi, Koriyama, Fukushima 963-8611, Japan.
Dent Mater J. 2008 Mar;27(2):211-5. doi: 10.4012/dmj.27.211.
The purpose of this study was to investigate the clinical application possibility of pure titanium konus telescope crowns fabricated using a CAD/CAM system. For the CAD/CAM system, Dental Cadim (Advance Co.) was used. For the material, exclusive pure titanium block for this system was used in this experiment. Two types of experimental dies with different heights assumed the konus inner crown and three types of konus outer crowns with different gap widths at the occlusal part were prepared. The outer crown was seated on the inner crown die, and a load was applied perpendicularly to the upper surface of the outer crown for 10 seconds. Pullout test was performed at a crosshead speed of 5 mm/min, and the retentive force was measured. With increase in the height of the inner crown die and the applied load, the retentive force of konus telescope crown increased. Similarly, as the gap width at the occlusal part between the inner crown die and outer crown increased, the retentive force of konus telescope crown also increased.
本研究的目的是探讨使用CAD/CAM系统制作的纯钛圆锥型套筒冠的临床应用可能性。对于CAD/CAM系统，使用了Dental Cadim（Advance Co.）。在本实验中，材料使用了该系统专用的纯钛块。制备了两种不同高度的实验代型以模拟圆锥型内冠，并制备了三种在咬合部分具有不同间隙宽度的圆锥型外冠。将外冠放置在内冠代型上，并垂直于外冠上表面施加负荷10秒。以5mm/min的十字头速度进行拔出试验，并测量固位力。随着内冠代型高度和施加负荷的增加，圆锥型套筒冠的固位力增加。同样，随着内冠代型与外冠之间咬合部分间隙宽度的增加，圆锥型套筒冠的固位力也增加。
