Espelid I, Tveit A B, Erickson R L, Keck S C, Glasspoole E A
School of Dentistry, University of Bergen, Norway.
Dent Mater. 1991 Apr;7(2):114-7. doi: 10.1016/0109-5641(91)90056-5.
The aim of this study was to compare the accuracy of radiographic diagnosis of secondary carious lesions adjacent to filling materials with different radiopacities. Class II preparations were made in extracted teeth. One group of teeth (n = 49) had caries in the gingival wall, simulating secondary caries. The control teeth (n = 29) had no caries. Three posterior composite materials (P-30 and two experimental composites) with different radiopacities and amalgam were successively inserted into each cavity. After being radiographed, the "restorations" were removed and a new material inserted. The radiographs were interpreted by 11 dentists, and secondary caries was diagnosed according to a five-point confidence rating. The results obtained with the receiver operating characteristics (ROC) method showed that a semi-radiopaque restoration seemed favorable and that the best radiopacity slightly exceeded that of enamel.
本研究的目的是比较不同射线不透性的补牙材料相邻继发龋损的放射诊断准确性。在拔除的牙齿上制备Ⅱ类洞型。一组牙齿（n = 49）在龈壁有龋损，模拟继发龋。对照牙齿（n = 29）无龋损。将三种具有不同射线不透性的后牙复合树脂材料（P - 30和两种实验性复合树脂）以及银汞合金依次填入每个窝洞。拍完X线片后，去除“修复体”并填入一种新材料。11名牙医解读X线片，并根据五点置信度分级诊断继发龋。采用受试者工作特征（ROC）方法获得的结果表明，半射线不透性修复体似乎更有利，且最佳射线不透性略超过牙釉质。
