Department of Oral Diagnosis, Dental Teaching Hospital, College of Dentistry, Baghdad University.
Department of Oral and Maxillofacial Surgery/Dental Teaching Hospital/AlMustansyria University.
J Craniofac Surg. 2022;33(2):e165-e168. doi: 10.1097/SCS.0000000000008182.
Cone beam computerized computed tomography (CBCT) has been widely indicated in dental implant procedure. The first step that the doctors should perform in local hospitals is to use orthopantomography for surgical planning to avoid and limit the risk of complications. As a result, determining the magnification amount of orthopantomography to achieve a precise diagnosis is clinically important. This study investigated the difference in measurement of the mental foramen (MF) position before dental surgery using 2 views of CBCT.
Cone beam computed tomography scan was performed for 100 patients who required implant placement. In the panoramic and three-dimensional views of CBCT, the vertical distance between the margin of the mandible and the lower border of MF, and the horizontal distance between the mandibular symphysis and the mesial anterior border of MF were calculated. The differences between the 2 views were compared using Wilcoxon-rank U test with P value ≤ 0.05 considered statistically significant.
The findings of this study showed a substantial statistical difference in the horizontal distance for the dentate patients in panoramic and three-dimensional views (22.7 ± 3.04 versus 21.1 ± 1.6), (22.5 ± 2.4 versus 20.9 ± 1.5) and left side (22.4 ± 2.8 versus 21.2 ± 1.6), (22.4 ± 2.8 versus 20.6 ± 1.4) of both genders. Concerning the vertical distance, a significant difference was also observed in the dentate (12.1 ± 2.1 versus 11.1 ± 1.4), (10.6 ± 1.4 versus 9.6 ± 1.3) and left side of the jaw (11.6 ± 1.95 versus 10.9 ± 1.2), (10.5 ± 1.2 versus 9.96 ± 1.4) for both genders in both views. In the edentulous and right side of the jaw, however no statistical difference was observed between male and female patients in terms of horizontal and vertical measurements.
锥形束计算机断层扫描（CBCT）已广泛应用于牙科植入手术。当地医院的医生应首先进行全景片来进行手术规划，以避免和限制并发症的风险。因此，确定全景片的放大量以实现精确诊断具有重要的临床意义。本研究旨在探讨使用两种 CBCT 视图测量下颌神经管（MF）位置的差异。
对 100 名需要植入物的患者进行锥形束 CT 扫描。在 CBCT 的全景和三维视图中，测量下颌骨边缘和 MF 下缘之间的垂直距离，以及下颌骨联合和 MF 近中前边界之间的水平距离。使用 Wilcoxon-rank U 检验比较两种视图之间的差异，P 值≤0.05 被认为具有统计学意义。
本研究发现，有牙患者在全景和三维视图中，水平距离的测量存在显著统计学差异（男：22.7±3.04 与 21.1±1.6），（女：22.5±2.4 与 20.9±1.5），左侧（男：22.4±2.8 与 21.2±1.6），（女：22.4±2.8 与 20.6±1.4）。垂直距离方面，在有牙患者的双侧下颌中也观察到显著差异（男：12.1±2.1 与 11.1±1.4），（女：10.6±1.4 与 9.6±1.3），左侧（男：11.6±1.95 与 10.9±1.2），（女：10.5±1.2 与 9.96±1.4）。然而，在无牙患者和右侧下颌中，男性和女性患者在水平和垂直测量方面均无统计学差异。
