Sanderink G C, Huiskens R, van der Stelt P F, Welander U S, Stheeman S E
Department of Oral Radiology, Academic Center for Dentistry, Amsterdam, The Netherlands.
Oral Surg Oral Med Oral Pathol. 1994 Jul;78(1):125-32. doi: 10.1016/0030-4220(94)90128-7.
The Trophy RadioVisioGraphy model 32000 system in Normal Mode, the Trophy RVG-PC in Normal and Archive Mode, the Gendex VIXA/Visualix, the Regam Sens-A-Ray, and the Villa Flash Dent in High-Resolution Mode and Normal Mode were compared with respect to the visibility of endodontic files. Kodak Ektaspeed film served as the reference. An acrylic embedded human skull was prepared for taking radiographs with endodontic files (Kerr files size 10 and size 15) on full root length and 1.5 mm short in upper and lower premolars and molars. Possibilities for enhancement of the digital images were not studied. Receiver operating characteristics curves were derived and the areas under the curves were averaged and compared using Student's t test statistic (p < 0.05). Kodak Ektaspeed film gave acceptable results for both file sizes. Both Trophy RVG units in Normal Mode and the Regam Sens-A-Ray system gave results above the areas under the curves equals 0.95 for the size 15 files. For the size 10 files the values of the areas under the curves of all sensors systems were below this threshold. It is concluded that both RVG units in Normal Mode and the Sens-A-Ray system render a comparable result with conventional radiography in determining root canal length with the use of a size 15 files. All sensor systems were unacceptably inferior to film images when size 10 files were used.
将Trophy 32000型放射成像系统的正常模式、Trophy RVG - PC的正常模式和存档模式、Gendex VIXA/Visualix、Regam Sens - A - Ray以及Villa Flash Dent的高分辨率模式和正常模式，就牙髓锉的可视性进行了比较。柯达Ektaspeed胶片作为参考。制备了一个丙烯酸包埋的人类头骨，用于在上颌和下颌前磨牙及磨牙的全根长度以及短1.5毫米的情况下拍摄带有牙髓锉（Kerr锉，10号和15号）的X光片。未研究增强数字图像的可能性。绘制了受试者工作特征曲线，并使用学生t检验统计量对曲线下面积进行平均和比较（p < 0.05）。柯达Ektaspeed胶片对于两种锉的尺寸都给出了可接受的结果。正常模式下的两个Trophy RVG设备以及Regam Sens - A - Ray系统对于15号锉的曲线下面积结果高于0.95。对于10号锉，所有传感器系统的曲线下面积值均低于该阈值。得出的结论是，正常模式下的两个RVG设备以及Sens - A - Ray系统在使用15号锉确定根管长度时，与传统放射成像的结果相当。当使用10号锉时，所有传感器系统的图像质量均明显低于胶片图像。
