Analysis of internal defects in all-ceramic crowns using micro-focus X-ray computed tomography
Analysis of internal defects in all-ceramic crowns using micro-focus X-ray computed tomography
复制标题
DOI：
10.4012/dmj.26.598
复制
发表时间：
2007-07-01
影响因子：
2.5
通讯作者：
Yatani, Hirofumi
中科院分区：
文献类型：
--
作者：
Nakamura, Takashi;Wakabayashi, Kazumichi;Yatani, Hirofumi
本研究的目的是使用微焦点X线计算机断层扫描（microCT）检查全瓷冠的内部缺陷。以单瓷CAD/CAM冠、陶瓷核CAD/CAM冠和热压瓷冠为试件。采用三维体绘制软件对冠体进行显微CT扫描，结果显示：单瓷CAD/CAM冠几乎不含孔隙，而瓷核CAD/CAM冠仅在瓷贴面区含有孔隙。结果表明，microCT能无损观察到全瓷冠内部孔隙，CAD/CAM全瓷冠的孔隙率明显低于手工制作的全瓷冠。
The purpose of this study was to examine all-ceramic crowns for internal defects using micro-focus X-ray computed tomography (microCT). Mono-ceramic CAD/CAM crowns, ceramic-core CAD/CAM crowns, and heat-pressed ceramic crowns were used as specimens. The microCT images of the specimens were obtained and analyzed using a 3D volume rendering software.Mono-ceramic CAD/CAM crowns contained almost no pores, while ceramic-core CAD/CAM crowns contained pores only in the porcelain veneer area. Heat-pressed ceramic crowns had lots of pores in the cusps and the area around them.Results of this study indicated that internal pores in all-ceramic crowns could be observed non-destructively using microCT, and that CAD/CAM all-ceramic crowns contained fewer pores than crowns fabricated using manual techniques.