Chandler N P
N Z Dent J. 1989 Jan;85(379):23-6.
A study was performed to determine if the radiographic appearances of the coronal pulp spaces provide a reliable indication of pulp size in maxillary incisors. The use of student and staff assessor groups showed that length of clinical experience did not influence assessments of the size of the coronal pulp. A measuring grid, superimposed over a duplicate set of films, decreased the students' perception of the size of the coronal pulp. The presence of small carious lesions or restorations did not affect the assessments for either of the film types viewed. The data were pooled to give a mean radiographic size for each tooth, and the teeth were sectioned. Analysis of the results demonstrated the value of carefully viewing incisor crowns shown on pre-operative periapical radiographs. Sectioning of the teeth suggested that very little dentine may remain to protect the pulp after routine crown preparations. Even the very conservative preparations sometimes necessary when providing veneers might be considered a hazard to the pulp, as they may expose large areas of the dentine of an immature tooth.
开展了一项研究，以确定上颌切牙冠髓腔的影像学表现是否能可靠地反映牙髓大小。学生和工作人员评估组的使用表明，临床经验的长短不会影响对冠髓大小的评估。将测量网格叠加在一组复制的胶片上，降低了学生对冠髓大小的感知。小龋损或修复体的存在不影响对所观察的两种胶片类型的评估。汇总数据得出每颗牙齿的平均影像学大小，然后将牙齿进行切片。结果分析表明，仔细观察术前根尖片上显示的切牙冠具有重要价值。牙齿切片显示，常规牙冠预备后可能仅残留极少的牙本质来保护牙髓。即使在提供贴面时有时需要进行的非常保守的预备，也可能被认为对牙髓有危害，因为它们可能会暴露未成熟牙齿的大面积牙本质。
