Kajan Zahra Dalili, Kia Javad, Motevasseli Safa, Rezaian Saman Rokh
Department of Maxillofacial Radiology, Faculty of Dentistry, Research Center for Allergic Diseases of Paranasal Sinuses, Guilan University of Medical Sciences, Rasht, Iran.
Department of Oral Medicine, Dental School, Guilan University of Medical Sciences, Rasht, Iran.
Dent Res J (Isfahan). 2015 Jan-Feb;12(1):14-9. doi: 10.4103/1735-3327.150289.
Implant placement plays a vital role in oral rehabilitation following loss of the incisors. Thus, having knowledge of anatomical variations of adjacent neurovascular structures especially the nasopalatine canal (NPC) is essential. Due to the lack of basic information in Iran about the morphology of this canal and the probability of its variety in different populations, this study was designed on an Iranian population.
In this descriptive study, we selected cone-beam computed tomography images of 198 patients comprising of 98 males and 100 females in two dental groups (edentulous or dentate). The shape of the nasopalatine foramen and the form of the canal in axial views were assessed. Then, the canal height and its diameter at the palatal, middle and nasal levels in cross-sectional images were measured. The available bone in the buccal and palatal sides of the canal was assessed. Data analysis was carried out using a Chi-square test and an independent t-test (P ≤ 0.05).
The majority of the samples (81.8%) presented a single foramen. Cylindrical shape (57.6%) was the most frequently detected canal form. The mean of the estimated canal height was 12.84 ± 2.88 mm. The canal diameter at the palatal level between the sexes and dental groups showed statistically significant differences.
In our investigated population, the NPC form was mainly cylindrical with a single opening foramen. The mean of the canal height was higher than that found in other populations. Furthermore, the canal diameter in the edentulous group was greater than that observed in the other group.
种植体植入在门牙缺失后的口腔修复中起着至关重要的作用。因此，了解相邻神经血管结构的解剖变异，尤其是鼻腭管（NPC），至关重要。由于伊朗缺乏关于该管形态的基础信息，以及不同人群中其变异的可能性，本研究以伊朗人群为对象展开。
在这项描述性研究中，我们选取了198例患者的锥形束计算机断层扫描图像，其中包括两个牙列组（无牙或有牙）的98名男性和100名女性。评估了轴向视图中鼻腭孔的形状和管道的形态。然后，测量了横断面图像中管道在腭部、中部和鼻部水平的高度及其直径。评估了管道颊侧和腭侧的可用骨量。使用卡方检验和独立t检验进行数据分析（P≤0.05）。
大多数样本（81.8%）呈现单个孔。圆柱形（57.6%）是最常检测到的管道形态。估计的管道平均高度为12.84±2.88毫米。管道在腭部水平的直径在性别和牙列组之间存在统计学上的显著差异。
在我们的研究人群中，NPC形态主要为圆柱形，有单个开口孔。管道平均高度高于其他人群。此外，无牙组的管道直径大于另一组观察到的直径。
