Nikneshan Sima, Boroumand Rabieh, Esmaeeli Nasim, Azadikhah Ali, Paknahad Maryam
Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Postgraduate Student, Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
J Dent (Shiraz). 2023 Sep;24(3):335-341. doi: 10.30476/dentjods.2022.95708.1885.
Different software capabilities have been used in digital systems to increase the diagnostic quality of radiographic projections. Considering the availability of different enhancement techniques, it is necessary to determine the suitability of each technique for various diagnostic cases. There is controversy between studies over the effect of different digital enhancement techniques on the accuracy of file length measurements in endodontics.
The present study aimed to determine the effect of the software capabilities on the diagnostic accuracy to determine endodontic file lengths in photostimulable phosphor (PSP) radiographs.
In the present study, standard access cavities were prepared in 44 extracted human single-rooted permanent teeth. An endodontic file was placed in each root canal. PSP sensors were used for digital imaging using the parallel technique. All the images were reviewed on a same monitor; once normally with no software enhancement and once using software manipulations including pseudo-color, sharpness, emboss, and edge enhancement. The distance from the file tip to the rubber stop was measured on the images by an electronic ruler.
Significantly, all of the image enhancement techniques presented shorter measurements comparing to the actual length. The results revealed the significant accuracy of the measured error in the pseudo-color enhancement technique compared to other techniques.
The results revealed significant differences between the initial measurements (the gold standard) and those made on the manipulated radiographs. In all cases, the measurements were significantly lower than the real values. Therefore, none of these digital enhancement techniques can increase the accuracy of file length measurements significantly. However, manipulation with the pseudo-color option resulted in fewer errors compared to other options and the normal images. Hence, for precise measurements of the endodontic file lengths, pseudo-color processing algorithm can be suggested when using PSP sensors.
数字系统中已使用不同的软件功能来提高射线照相投影的诊断质量。考虑到不同增强技术的可用性，有必要确定每种技术对各种诊断病例的适用性。关于不同数字增强技术对牙髓病学中根管长度测量准确性的影响，研究之间存在争议。
本研究旨在确定软件功能对在光激励荧光体（PSP）射线照片中确定牙髓根管长度的诊断准确性的影响。
在本研究中，在44颗拔除的人类单根恒牙上制备标准开髓腔。在每个根管中放置一根牙髓锉。使用PSP传感器通过平行技术进行数字成像。所有图像均在同一台显示器上查看；一次不进行软件增强，一次使用包括伪彩色、锐化、浮雕和边缘增强在内的软件操作。通过电子尺在图像上测量从锉尖到橡胶止动器的距离。
值得注意的是，与实际长度相比，所有图像增强技术显示的测量值都较短。结果显示，与其他技术相比，伪彩色增强技术测量误差的准确性显著。
结果显示初始测量值（金标准）与处理后的射线照片测量值之间存在显著差异。在所有情况下，测量值均显著低于实际值。因此，这些数字增强技术均不能显著提高根管长度测量的准确性。然而，与其他选项和正常图像相比，使用伪彩色选项处理产生的误差更少。因此，在使用PSP传感器时，对于精确测量牙髓锉长度，可建议使用伪彩色处理算法。
