Jayasinghe R M, Hettiarachchi P V K S, Fonseka M C N, Nanayakkara D, Jayasighe R D
Department of Prosthetic Dentistry, Faculty of Dental Sciences, University of Peradeniya, Sri Lanka.
Department of Oral Medicine and Periodontology, Faculty of Dental Sciences, University of Peradeniya, Sri Lanka.
J Oral Biol Craniofac Res. 2020 Apr-Jun;10(2):238-240. doi: 10.1016/j.jobcr.2019.11.002. Epub 2019 Dec 3.
Nasopalatine canal (NPC) is an important anatomical structure present in the anterior mid maxilla. It has the synonyms of incisive canal or anterior palatine canal. The objective of this study was to identify the morphometric characteristics of the NPC in group of Sri Lankan people using Cone beam computer tomography (CBCT) and to determine normal morphological course and anatomical variations. Fifty Maxillary CBCT images of anterior maxilla, obtained from the archives of the University Dental Hospital, Peradeniya were retrospectively analyzed to determine the position of the NPC. Morphology, canal dimension of NPC and its relation to the maxilla. Majority had a single opening (48%) or 2 openings (46%). Average diameter of the canal was 3.692 mm with a range of 2-6 mm. Majority of the canals had funnel shape and were vertically curved. Average length of canal was 12.142 mm and angulations of the curvature was 115.694. Average antero-posterior diameter at nasal fossa was 2.852 mm, at mid-palate 2.366 mm and at hard palate 3.034 mm. Our findings were different from the findings reported in the literature. This may be due to the differences in ethnicity or limited size of sample. Within the limits of this study, we conclude that the form of the NPC is variable; predominantly funnel shaped with a single or two openings and with an average diameter of 3.7 mm in Sri Lankan population. Identification of variations in the position and shape will help in clinical practice specially in introducing local anesthetic block injections during dental treatment.
鼻腭管（NPC）是上颌前部中份存在的一个重要解剖结构。它有切牙管或前腭管的同义词。本研究的目的是使用锥形束计算机断层扫描（CBCT）确定斯里兰卡人群中鼻腭管的形态测量特征，并确定其正常形态走行及解剖变异。回顾性分析从佩拉德尼亚大学牙科医院存档中获取的50张上颌前部的CBCT图像，以确定鼻腭管的位置、形态、管径及其与上颌的关系。大多数有单个开口（48%）或两个开口（46%）。管的平均直径为3.692毫米，范围为2 - 6毫米。大多数管呈漏斗形且垂直弯曲。管的平均长度为12.142毫米，弯曲角度为115.694度。鼻窝处的前后平均直径为2.852毫米，腭中部为2.366毫米，硬腭处为3.034毫米。我们的研究结果与文献报道的结果不同。这可能是由于种族差异或样本量有限。在本研究的范围内，我们得出结论，鼻腭管的形态是可变的；在斯里兰卡人群中主要呈漏斗形，有单个或两个开口，平均直径为3.7毫米。识别位置和形状的变异将有助于临床实践，特别是在牙科治疗中进行局部麻醉阻滞注射时。
