Westphalen V P D, Gomes de Moraes I, Westphalen F H, Martins W D, Souza P H Couto
Coourse of Dentistry, PUC-PR, Av. República do Líbano, 462 CEP 82520-500 Jardim Social, Curitiba, PR, Brazil.
Dentomaxillofac Radiol. 2004 Jul;33(4):233-5. doi: 10.1259/dmfr/65487937.
The purpose of this study was to evaluate and to compare the efficacy of a conventional and a digital radiographic method in diagnosing simulated external root resorption cavities.
Human dry mandibles containing teeth were covered with bovine muscle slices in order to simulate the soft tissues. Nine teeth from each dental group were investigated. Three periapical radiographs of each tooth were taken in an orthoradial, mesioradial and distoradial aspect using conventional film (Insight Kodak F-speed; Eastman Kodak, Rochester, NY) and a digital sensor (DRS Gnatus System; Gnatus, Ribeirao Preto, Brasil). The teeth were extracted using a forceps and had 0.7 mm and 1.0 mm deep cavities prepared on their vestibular, mesial and distal surfaces at the cervical, middle and apical thirds. Following preparation, each tooth was replaced in its alveolus and new radiographs were taken. Three dental professionals, an endodontist, a radiologist and a general practioner, evaluated the images.
A larger number of cavities (P<0.05) were detected by the digital method when compared with the conventional method, for all depths of lesions.
The results of this study suggest that the digital radiographic method is more sensitive than conventional radiography to detect simulated external root resorption cavities.
本研究旨在评估并比较传统放射成像方法与数字放射成像方法在诊断模拟性外吸收腔方面的疗效。
用人的含牙干燥下颌骨覆盖牛肌肉切片以模拟软组织。对每个牙组中的9颗牙齿进行研究。使用传统胶片（柯达Insight F型胶片；伊士曼柯达公司，纽约州罗切斯特）和数字传感器（DRS Gnatus系统；Gnatus公司，巴西里贝朗普雷图），从正位、近中斜位和远中斜位为每颗牙齿拍摄3张根尖片。用镊子拔除牙齿，并在其颈部、中部和根尖三分之一处的前庭、近中和远中表面制备深度为0.7毫米和1.0毫米的洞。制备完成后，将每颗牙齿放回牙槽窝并拍摄新的X线片。由3名牙科专业人员，一名牙髓病医生、一名放射科医生和一名全科医生对图像进行评估。
对于所有病变深度，与传统方法相比，数字方法检测到的洞数量更多（P<0.05）。
本研究结果表明，在检测模拟性外吸收腔方面，数字放射成像方法比传统放射成像更敏感。
