Department of Orthodontics, University of Geneva, Rue Barthelemy-Menn 19, Geneva, Switzerland.
Acta Odontol Scand. 2010 Mar;68(2):91-7. doi: 10.3109/00016350903468235.
This methodological study aimed to determine whether the mandibular trabecular bone assessment from panoramic radiographs, using a visual index, corresponds to the evaluation obtained from periapical radiographs.
A panoramic radiograph and corresponding periapical radiographs of the region of the lower premolars and molars were collected from each of 32 patients (mean age 18.5 +/- 5.5 years). Two calibrated observers assessed randomly the interdental sites between the first molar and second premolar and between the two premolars on all the radiographs using a visual index. Evaluations were repeated with an interval of 60 days. The results of the repeated evaluations were used to assess intra- and inter-observer agreements, employing Kappa statistics. Spearman's correlation was used to determine the association between assessments of panoramic and periapical radiographs.
In total, 79 interdental sites were evaluated on the panoramic and periapical radiographs. The visual analysis of periapical radiographs revealed intra-observer agreements of 0.88 for observer 1 and 0.93 for observer 2, and an inter-observer agreement of 0.82. The intra-observer agreement for panoramic radiographs was 0.79 and 0.83 for observers 1 and 2, respectively, and the inter-observer agreement was 0.79. A substantial correlation was found between periapical and panoramic radiographs (rho = 0.737, p = 0.001).
Although panoramic radiographs are less reliable than periapical radiographs, they can be used for assessment of the trabecular bone pattern with the aid of a visual index. Training on the method is recommended to obtain results with a high reproducibility.
本方法学研究旨在确定使用视觉指数从全景片评估下颌骨小梁骨是否与根尖片获得的评估结果相对应。
从 32 名患者（平均年龄 18.5±5.5 岁）的下颌前磨牙和磨牙区域采集了一张全景片和相应的根尖片。两名经过校准的观察者使用视觉指数随机评估了所有放射片中第一磨牙和第二前磨牙之间以及两个前磨牙之间的牙间部位。评估间隔为 60 天。使用 Kappa 统计评估重复评估的结果来评估观察者内和观察者间的一致性。采用 Spearman 相关分析来确定全景和根尖片评估之间的相关性。
总共在全景和根尖片中评估了 79 个牙间部位。根尖片的视觉分析显示，观察者 1 的观察者内一致性为 0.88，观察者 2 的观察者内一致性为 0.93，观察者间一致性为 0.82。全景片的观察者内一致性分别为观察者 1 的 0.79 和观察者 2 的 0.83，观察者间一致性为 0.79。发现根尖片和全景片之间存在高度相关性（rho=0.737，p=0.001）。
虽然全景片不如根尖片可靠，但可以使用视觉指数来评估小梁骨模式。建议进行方法培训以获得具有高重现性的结果。
