イットリア安定化ジルコニア製人工歯冠の 光造形アディティブ・マニュファクチャリング

抄録

Ceramic dental crowns composed of yttria-stabilized zirconia（YSZ）were fabricated by stereolithographic additive manufacturing（STL-AM）. The YSZ composite appeared translucent on crown surfaces. In graphic modeling, installation structures were designed to hold and mount the crown object with free surfaces. The nanoparticles were dispersed in acrylic resins to obtain a paste-like consistency for STL processing. An ultraviolet laser beam was scanned over the evenly spread out paste to create two-dimensional （2D）cross sections. Through layer stacking and interlayer bonding, three-dimensional （3D）components were successfully shaped. The dimensional tolerances for the horizontal and vertical features were optimized by systematic modulation of the irradiated power. The composite precursors were dewaxed and sintered in ambient air to create the filled ceramic crowns. The dense ceramic microstructures were observed using scanning electron microscopy（SEM）. The linear shrinkages were measured and incorporated into the model for structural design to realize high-dimensional accuracies.