Afrand Mona, Oh Heesoo, Flores-Mir Carlos, Lagravère-Vich Manuel O
Department of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada.
Department of Orthodontics, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, Calif.
Am J Orthod Dentofacial Orthop. 2017 Feb;151(2):342-350.e2. doi: 10.1016/j.ajodo.2016.02.032.
Initially, cone-beam computed tomography images from dry skulls were used to 3 dimensionally evaluate intrarater and interrater reliabilities and accuracy of selected 3-dimensional landmarks located in the anterior and middle cranial bases. Thereafter, dimensional changes of the anterior and middle cranial bases with growth were evaluated by using the previously selected landmarks.
Cone-beam computed tomography images of 10 dry skulls were used to identify useful landmarks from different areas of the anterior and middle cranial bases based on their reliability and accuracy. These selected landmarks were identified in the images of an already available sample of adolescents (n = 60) taken at 2 time points (19 months apart) to assess dimensional changes with growth.
The majority of the proposed 3-dimensional landmarks with the exception of the lesser wing of the sphenoid showed acceptable intrarater and interrater reliabilities. The distances measured between foramina and canals in the transverse dimension showed evidence of increases in size. However, the mean amounts of increase in these transverse distances were equal to or less than 1.05 mm (from 1.1% to 4.1%). No change was observed between the right and left anterior and posterior clinoid processes. The vertical dimensions showed evidence of some changes, but these were within 2% of the original distances.
In this adolescent sample, minor growth-related changes were observed in the anterior and middle cranial bases. The midsagittal area of the anterior cranial base (foramen caecum to presphenoid) was stable. The right and left anterior and posterior clinoid processes can be used for transverse superimposition.
最初，利用干燥颅骨的锥束计算机断层扫描图像对位于前颅底和中颅底的选定三维标志点进行了评分者内和评分者间的可靠性及准确性的三维评估。此后，通过使用先前选定的标志点评估了前颅底和中颅底随生长的尺寸变化。
使用10个干燥颅骨的锥束计算机断层扫描图像，根据其可靠性和准确性从前颅底和中颅底的不同区域识别有用的标志点。在一个已有的青少年样本（n = 60）的图像中，在两个时间点（相隔19个月）识别这些选定的标志点，以评估随生长的尺寸变化。
除蝶骨小翼外，大多数提议的三维标志点显示出可接受的评分者内和评分者间可靠性。在横向维度上测量的孔和管之间的距离显示出尺寸增加的证据。然而，这些横向距离的平均增加量等于或小于1.05毫米（从1.1%到4.1%）。左右前床突和后床突之间未观察到变化。垂直维度显示出一些变化的证据，但这些变化在原始距离的2%以内。
在这个青少年样本中，在前颅底和中颅底观察到与生长相关的微小变化。前颅底的矢状中区域（盲孔至蝶骨体前部）是稳定的。左右前床突和后床突可用于横向叠加。
