Wenzel A, Frandsen E, Hintze H
Department of Oral Radiology, Royal Dental College, University of Aarhus, Denmark.
J Dent. 1999 Mar;27(3):243-6. doi: 10.1016/s0300-5712(98)00063-3.
The aim was to compare a CCD-based sensor and a storage phosphor plate with respect to patient discomfort and the efficacy of a simple cross-infection control procedure in connection with a posterior bitewing examination.
130 patients accepted to have one posterior bitewing of the left and right side taken with two digital radiography systems, the Digora phosphor plate and the Trophy RVG XL, CCD-based sensor system. The patients assessed their feeling of discomfort after the examination on a 100-mm. Visual Analogue Scale (VAS). Microbiological samples were taken from the RVG sensor and cord and from the Digora envelope, plate and scanner during examination of 14 patients. The samples were plated and incubated anaerobically, and the colony-forming units counted.
Median VAS score for discomfort was 20 min for Digora and 32 min for the RVG sensor (P < 0.001). Median total counts of cultivable bacteria were low (< 20), the majority being catalase-positive, Gram-positive cocci and Gram-positive rods, presumably skin bacteria. Only the samples taken from the enveloped Digora plate and the rubber tube coated RVG sensor immediately after exposure yielded large numbers of oral bacteria.
The phosphor plate was less unpleasant than the CCD sensor. Cross-contamination posed a minor problem for both systems when a simple, standard hygiene procedure was followed.
旨在比较基于电荷耦合器件（CCD）的传感器和存储磷光板在患者不适感以及与后牙咬合翼片检查相关的简单交叉感染控制程序效果方面的差异。
130名患者同意使用两种数字射线摄影系统拍摄左右两侧的后牙咬合翼片，这两种系统分别是Digora磷光板和基于CCD传感器系统的Trophy RVG XL。患者在检查后使用100毫米视觉模拟量表（VAS）评估他们的不适感。在对14名患者进行检查期间，从RVG传感器及其线缆以及Digora信封、磷光板和扫描仪上采集微生物样本。将样本接种并进行厌氧培养，然后计算菌落形成单位。
Digora的不适感VAS评分中位数为20分钟，RVG传感器为32分钟（P < 0.001）。可培养细菌的总数中位数较低（< 20），大多数为过氧化氢酶阳性的革兰氏阳性球菌和革兰氏阳性杆菌，推测为皮肤细菌。仅在曝光后立即从装有信封的Digora磷光板和涂有橡胶管的RVG传感器上采集的样本中发现了大量口腔细菌。
磷光板比CCD传感器给患者带来的不适感更小。当遵循简单的标准卫生程序时，交叉污染对这两种系统来说都是一个小问题。
