Al-Homsi Hala K, Hajeer Mohammad Y
Department of Orthodontics, University of Damascus, Dental School, Damascus, Syria.
Associate Professor, Department of Orthodontics, University of Damascus, Dental School, Damascus, Syria, Phone: 00963113141343 e-mail:
J Contemp Dent Pract. 2015 Aug 1;16(8):648-56. doi: 10.5005/jp-journals-10024-1736.
To assess intra- and interobserver agreement when evaluating maxillary impacted canines using cone beam computed tomography (CBCT) and two-dimensional (2D) images through a panel of orthodontically trained observers.
An adult skull with permanent dentition was employed to perform 15 simulated maxillary canine impactions. Two sets of 2D and three-dimensional (3D) radiographic images were acquired. A panel of assessors including 11 PhD and MSc postgraduate orthodontic students evaluated maxillary impacted canines using a standard questionnaire with 11 categorical variables. Kappa (K) statistics as well as Krippendorff's alpha (α) coefficients were used for the analysis of reliability.
A high level of intraobserver agreement was found for both the CBCT- and 2D-based interpretations. The 11 observers demonstrated a higher interobserver agreement for the CBCT-based interpretations than that of the 2D-based interpretations (α = 0.68 and 0.38 respectively). The employed 3D classifications canines was found to be reliable among observers on CBCT images for the labiopalatal position (K = 0.87), mesiodistal position, vertical position, labiopalatal inclination and mesiodistal inclination (α = 0.95, 0.83, 0.84 and 0.92 respectively). The 2D-based interpretations were not in agreement among the 11 observers, except for the mesiodistal position (α = 0.88) and mesiodistal inclination (α = 0.88).
The intraobserver agreement was high for both the 2D- and the CBCT-based interpretations. The interobserver agreement for the CBCT-based interpretations was remarkably higher than that of the 2D-based interpretations. The utilized CBCT-based 3D classifications for the location and inclination of maxillary impacted canines were found reliable among observers.
通过一组接受过正畸培训的观察者，评估在使用锥形束计算机断层扫描（CBCT）和二维（2D）图像评估上颌埋伏尖牙时观察者内部和观察者之间的一致性。
使用一个带有恒牙列的成人颅骨进行15次模拟上颌尖牙埋伏。获取两组二维和三维（3D）放射图像。一组评估者包括11名正畸专业的博士和硕士研究生，使用包含11个分类变量的标准问卷评估上颌埋伏尖牙。使用Kappa（K）统计量以及克里彭多夫阿尔法（α）系数分析可靠性。
基于CBCT和基于2D的解读均发现观察者内部一致性较高。11名观察者基于CBCT的解读显示出比基于2D的解读更高的观察者间一致性（α分别为0.68和0.38）。在CBCT图像上，所采用的3D分类法在观察者之间对于尖牙的唇腭向位置（K = 0.87）、近远中位置、垂直位置、唇腭向倾斜度和近远中倾斜度是可靠的（α分别为0.95、0.83、0.84和0.92）。除了近远中位置（α = 0.88）和近远中倾斜度（α = 0.88）外，基于2D的解读在11名观察者之间不一致。
基于2D和基于CBCT的解读观察者内部一致性都很高。基于CBCT的解读观察者间一致性显著高于基于2D的解读。所采用的基于CBCT的上颌埋伏尖牙位置和倾斜度的3D分类法在观察者之间是可靠的。
