Akhare Pankaj J, Dagab Akshay M, Alle Rajkumar S, Shenoyd Usha, Garla Venkatesh
Abteilung fūr Kieferorthopädie und dentofaziale Orthopadie, VSPM Dental College and Research Centre, Nagpur, Maharashtra, Indien.
Abteilung für Mund-, Kiefer- und Gesichtschirurgie, VSPM Dental College and Research Centre, Nagpur, Maharashtra, Indien.
Int J Comput Dent. 2013;16(3):241-54.
The purpose was to compare the reliability of landmark identification and linear and angular measurements in conventional versus digital cephalometry. Using 50 cephalometric radiographs, four orthodontic residents identified 19 cephalometric landmarks followed by 18 linear and angular measurements of the same radiographs. The values of 18 measurements were compared to quantify the measurement difference and interobserver errors between these two methods. Multivariate analysis of variance showed that the "cephalometric radiograph" and "landmark" variation had greater influence than that of "method" (landmark identification on original radiograph/on digital). A statistically significant difference for interobserver errors between the two methods was noted only for 5 out of 19 cephalometric landmarks. The most accurately identified landmark in conventional and digitized method was Sella (S), followed by Nasion (N). Landmarks requiring further scrutiny in digital images were Porion (P) Articulare, ANS, UM, and LM. The advantages of digital cephalometry were also substantiated.
目的是比较传统头影测量法与数字头影测量法中标志点识别以及线性和角度测量的可靠性。使用50张头影测量X线片，四名正畸住院医师识别了19个头影测量标志点，随后对同一张X线片进行了18项线性和角度测量。比较18项测量值以量化这两种方法之间的测量差异和观察者间误差。多变量方差分析表明，“头影测量X线片”和“标志点”的变异比“方法”（原始X线片/数字图像上的标志点识别）的影响更大。仅在19个头影测量标志点中的5个上，两种方法之间观察者间误差存在统计学显著差异。传统方法和数字化方法中识别最准确的标志点是蝶鞍（S），其次是鼻根点（N）。在数字图像中需要进一步仔细检查的标志点是耳点（P）、关节点、前鼻棘、上中切牙点和下中切牙点。数字头影测量法的优势也得到了证实。
