Wenzel A, Kirkevang L-L
Department of Oral Radiology, Faculty of Health Sciences, Royal Dental College, University of Aarhus, Aarhus, Denmark.
Eur J Dent Educ. 2004 Nov;8(4):167-71. doi: 10.1111/j.1600-0579.2004.00347.x.
The aim of this study was to evaluate students' attitudes towards digital radiography and measurement accuracy in digital images recorded with a CCD-sensor and a photostimulable phosphor (PSP) plate radiography system in connection with root canal treatment. Thirty-one dental students participated in an endodontic course. Two single-rooted teeth were assigned at random to two receptors for digital radiographic examination, either (i) the RVG-ui CCD sensor or (ii) the Digora PSP plate system. After the endodontic treatment had been completed for the first tooth, the student filled in a questionnaire on their use of the digital system. Thereafter, the students switched radiography system and repeated the procedure for the second tooth. Eventually, the students completed the questionnaire by answering questions that directly compared the two digital systems. The gutta-percha filled tooth was measured using the system's own software. Two measurements of each tooth were performed: total tooth length (TTL) and root filling length (RFL). The teeth were dismounted from the plaster blocks and the true TTL and RFL was measured with an electronic slide calliper. The majority of the students had used the contrast enhancement facility (CCD sensor = 52%, PSP = 71%) and the zoom facility (65-68%) whilst some had used the density enhancement facility (CCD sensor = 39%, PSP = 55%). The students stated that they saved more time when they used the CCD sensor than when they used the PSP system (P < 0.001), and that it was easier to position the tooth with the PSP plate than with the sensor (P < 0.01). The lengths measured on the digital images from both digital systems were marginally larger than the true tooth lengths (P < 0.05). However, there was no difference between the two digital systems for the TTL/RFL ratio (P > 0.05).
本研究的目的是评估学生对数字放射成像的态度，以及在根管治疗中使用电荷耦合器件（CCD）传感器和光激励荧光体（PSP）板放射成像系统所记录数字图像的测量准确性。31名牙科专业学生参加了牙髓病学课程。随机将两颗单根牙分配给两种感受器进行数字放射学检查，即（i）RVG-ui CCD传感器或（ii）Digora PSP板系统。在第一颗牙齿完成根管治疗后，学生填写一份关于其使用数字系统的问卷。此后，学生更换放射成像系统，并对第二颗牙齿重复该操作。最后，学生通过回答直接比较两种数字系统的问题来完成问卷。使用系统自带软件测量根管充填牙的长度。对每颗牙齿进行两次测量：牙齿总长度（TTL）和根管充填长度（RFL）。将牙齿从石膏模型上取下，用电子游标卡尺测量真实的TTL和RFL。大多数学生使用了对比度增强功能（CCD传感器为52%，PSP为71%）和缩放功能（65 - 68%），而一些学生使用了密度增强功能（CCD传感器为39%，PSP为55%）。学生们表示，使用CCD传感器比使用PSP系统节省更多时间（P < 0.001），并且使用PSP板比使用传感器更容易放置牙齿（P < 0.01）。两种数字系统在数字图像上测量的长度略大于真实牙齿长度（P < 0.05）。然而，两种数字系统在TTL/RFL比值方面没有差异（P > 0.05）。
