Frongia Gianluigi, Bracco Pietro, Piancino Maria Grazia
Division of Orthodontics, Department of Surgery, Dental School, Turin University, Turin, Italy.
J Craniofac Surg. 2013 May;24(3):e308-11. doi: 10.1097/SCS.0b013e31828f2e8e.
The aims of this work were (1) to describe a method to identify new skeletal landmarks useful to define the reference system to orient the skull in a new position after cone-bean computed tomographic scan and (2) to demonstrate the reliability of this new method.Ten orthognathic patients (5 male, 5 female; mean [SD] age, 18.9 [1.2] years) underwent the cone-bean computed tomographic scan before surgery. Seven 3-dimensional skeletal measurements derived from 4 skeletal point of construction (C) (right, left, and median orbital C, and sella C) have been used for this study. Reliability has been calculated using Pearson correlation coefficient tests.Intraobserver reliability was 0.9999 for operator A (T1-T2) and 0.9999 for operator B (T1-T2); interobserver reliability was 0.9999 between the first (T1-T1) measurement and 0.9999 between the second (T2-T2).The original method is able to reduce the variability of landmark identification due to the variability of the human anatomy and the influence of the human error in cephalometric analysis. The innovation of this new method is the real possibility to use the anatomical structures in a 3-dimensional way, enhancing the reliability of the reference points.
（1）描述一种方法，用于识别新的骨骼标志点，这些标志点有助于定义参考系统，以便在锥形束计算机断层扫描后将颅骨定位到新的位置；（2）证明这种新方法的可靠性。10例正颌患者（5例男性，5例女性；平均[标准差]年龄，18.9[1.2]岁）在手术前接受了锥形束计算机断层扫描。本研究使用了从4个骨骼构建点（C）（右侧、左侧和正中眶C，以及蝶鞍C）得出的7项三维骨骼测量值。使用Pearson相关系数检验计算可靠性。观察者内可靠性对于操作员A（T1-T2）为0.9999，对于操作员B（T1-T2）为0.9999；观察者间可靠性在第一次（T1-T1）测量之间为0.9999，在第二次（T2-T2）测量之间为0.9999。原始方法能够减少由于人体解剖结构的变异性和头影测量分析中人为误差的影响而导致的标志点识别的变异性。这种新方法的创新之处在于真正有可能以三维方式使用解剖结构，提高参考点的可靠性。
