Shokri Abbas, Khajeh Samira, Khavid Atefeh, Tabari Sara, Yarmohammadi Shiva
Department of Oral and Maxillofacial Radiology, Dental School of Hamadan University of Medical Sciences, Hamadan Iran.
Postgraduate Student, Department of Oral and Maxillofacial Radiology, Dental School of Hamadan University of Medical Sciences, Hamadan Iran Phone: +98-9188362065, e-mail:
J Contemp Dent Pract. 2015 Jul 1;16(7):542-6. doi: 10.5005/jp-journals-10024-1719.
Use of dental implants in edentulous patients has become a common treatment modality. Treatment of such implants requires radiographic evaluation, and in most cases several different imaging techniques are necessary in order to evaluate the height, width and the structure of bone at implant site. The aim of this study was to evaluate the influence of head orientation in linear measurement for implant planning in cone beam computed tomography (CBCT).
In the present in vitro study, 11 human dry mandibles were used. The width and height of bone at the central, canine and molar teeth areas were measured on the left and right sides by using digital calipers (as gold standard) and on CBCT images with Reaxis option and no Reaxis. Data were analyzed with Statistical package for the social sciences (SPSS) 18, using pair t-test, Tukey test and intraclass correlation (ICC).
Data were collected by evaluation of 11 skulls and 66 samples on the whole. There were no significant differences in bone width in any area in both Reaxis and no Reaxis option (p > 0.05). There were significant differences in bone height in the central (p = 0.005) and molar teeth areas (p = 0.010). The results did not show any significant differences between the observers (p = 0.329).
Using the Reaxis option does not affect the measurement of bone width, while use of this option can make a significant difference for height measurements.
在无牙患者中使用牙种植体已成为一种常见的治疗方式。此类种植体的治疗需要进行影像学评估，并且在大多数情况下，为了评估种植部位的骨高度、宽度和结构，需要几种不同的成像技术。本研究的目的是评估在锥形束计算机断层扫描（CBCT）中进行种植体规划时头部方位对线性测量的影响。
在本体外研究中，使用了11具人类干燥下颌骨。通过使用数字卡尺（作为金标准）以及在有Reaxis选项和无Reaxis选项的CBCT图像上，测量左右两侧中央、尖牙和磨牙区域的骨宽度和高度。使用社会科学统计软件包（SPSS）18对数据进行分析，采用配对t检验、Tukey检验和组内相关系数（ICC）。
总共通过对11个头骨和66个样本的评估收集数据。在有Reaxis选项和无Reaxis选项的情况下，任何区域的骨宽度均无显著差异（p > 0.05）。中央区域（p = 0.005）和磨牙区域（p = 0.010）的骨高度存在显著差异。结果显示观察者之间没有任何显著差异（p = 0.329）。
使用Reaxis选项不会影响骨宽度的测量，而使用该选项对高度测量可能会产生显著差异。
