Akesson L, Rohlin M, Håkansson J
Dentomaxillofac Radiol. 1989 Aug;18(3):105-12. doi: 10.1259/dmfr.18.3.2637876.
Five observers assessed the panoramic and full-mouth (14 periapical and four posterior bitewing) radiographs of 20 patients each for the ability to interpret and measure the marginal bone level. The image quality of each site was classified as excellent, acceptable or unacceptable. Depiction errors affecting interpretability and measurability were also noted. In the upper arch, the frequency of uninterpretable and non-measurable sites was almost equal for panoramic and periapical radiography. Image quality was better with periapical radiography in the lower arch. In the posterior regions of both arches, more sites could not be measured from panoramic compared with bitewing radiographs. Due to overlapping the distal surface of the maxillary canine and the mesial surface of the first maxillary premolar could often not be interpreted in either panoramic or periapical radiographs, but infrequently in the bitewings. In the lower arch, the most frequent depiction error was inadequate density in the incisor region of panoramic radiographs. On the basis of these results, we proposed that in clinical practice the panoramic radiograph can be supplemented with individually selected periapicals. In epidemiological studies, the panoramic radiograph should be combined with a premolar bitewing radiograph.
五名观察者对20名患者的全景片和全口片（14张根尖片和4张后牙咬合翼片）进行评估，以判断其解读和测量边缘骨水平的能力。每个部位的图像质量分为优秀、可接受或不可接受。还记录了影响解读性和可测量性的描绘错误。在上颌，全景片和根尖片无法解读及不可测量部位的频率几乎相同。在下颌，根尖片的图像质量更好。在上下颌的后部区域，与咬合翼片相比，全景片中更多部位无法测量。由于重叠，上颌尖牙远中面和第一前磨牙近中面在全景片和根尖片中常常无法解读，但在咬合翼片中不常见。在下颌，最常见的描绘错误是全景片中切牙区域密度不足。基于这些结果，我们建议在临床实践中，全景片可辅以单独选择的根尖片。在流行病学研究中，全景片应与前磨牙咬合翼片相结合。
