Kugelberg C F, Ahlström U, Ericson S, Hugoson A
Int J Oral Maxillofac Surg. 1986 Dec;15(6):675-86. doi: 10.1016/s0300-9785(86)80108-9.
The effect of periodontal tissues of impacted lower 3rd molar surgery has been investigated in a retrospective study comprising 215 cases, 2 years postoperatively. In order to evaluate the precision and accuracy of the radiographic assessment of intrabony defects on the distal surface of the lower 2nd molar using conventional free hand technique, a methodological study was performed on 25 patients. The error variance due to variability in the radiographic reproduction and examiner inconsistency was between 3 and 4% of the total variance. In order to evaluate the radiographic assessment of intrabony defects, intraoral radiographs were taken in the deepest part of the intrabony defect with and without a probe as an indicator. Comparing the 2 sets of radiographs, the deviation was 1 mm or less in 87.9% of the cases. The radiopaque marker enhanced the accuracy of assessment of intrabony defects to 96.7%. The study shows the intraoral freehand technique to be sufficiently reliable as regards radiographic reproduction of the mandibular molar area. It also demonstrates that the radiographic method describes the depth of postoperative intrabony defects on the distal surface of the lower 2nd molar more accurately than probing depth measurements alone.
一项回顾性研究对215例患者下颌阻生第三磨牙手术后2年的牙周组织影响进行了调查。为了评估使用传统徒手技术对下颌第二磨牙远中面骨内缺损进行影像学评估的精确性和准确性，对25例患者进行了一项方法学研究。由于影像学再现的变异性和检查者的不一致性导致的误差方差占总方差的3%至4%。为了评估骨内缺损的影像学评估，在有和没有探针作为指示物的情况下，在骨内缺损最深部位拍摄口内X光片。比较两组X光片，87.9%的病例偏差在1毫米或更小。不透射线标记物将骨内缺损评估的准确性提高到了96.7%。该研究表明，就下颌磨牙区的影像学再现而言，口内徒手技术具有足够的可靠性。它还表明，影像学方法比单独的探诊深度测量更准确地描述了下颌第二磨牙远中面术后骨内缺损的深度。
