Al-Amery Samah M, Nambiar Phrabhakaran, Jamaludin Marhazlinda, John Jacob, Ngeow Wei Cheong
Dept. of Diagnostic and Integrated Dental Practice, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
Dept. of Community Oral Health and Clinical Prevention, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
PLoS One. 2015 Feb 13;10(2):e0117251. doi: 10.1371/journal.pone.0117251. eCollection 2015.
The maxillary incisive canal connects the roof of the oral cavity with the floor of nasal cavity and has the incisive and nasal foramina respectively at its two opposite ends. Its close proximity with the anterior incisors affects one's ability to place immediate implants in ideal position.
To avoid causing complication, variations in their dimensions were studied.
Images of ninety Mongoloids patients examined with i-CAT Cone Beam Computed Tomography were included. The sizes of the nasopalatine foramen, the incisive canal and foramen, and anterior maxillary bone thickness were measured. The direction and course of the canals were assessed.
The mean labiopalatal and mesiodistal measurements of the incisive foramen were 2.80 mm and 3.49 mm respectively, while the labiopalatal width of the nasal foramen was 6.06 mm. The incisive canal was 16.33 mm long and 3.85 mm wide. The anterior maxillary bone has an average thickness of 7.63 mm. The dimensions of the incisive foramen and incisive canal, and anterior maxillary bone thickness demonstrated gender differences with males showing greater values. The anterior maxillary bone thickness was affected by age but this difference was not observed in canal dimensions. The majority of subjects have a funnel shape-like incisive canal with the broader opening located at its superior. They seem to have a longer slanted-curve canal with one channel at its middle portion and a narrower incisive foramen opening than those reported elsewhere.
This study found that gender is an important factor that affected the characteristics of the IC and the amount of bone anterior to it. Male generally had bigger IC and thicker anterior bone. In addition, the anterior maxillary bone thickness was affected by aging, where it becomes thinner with increased age even though the subjects were fully dentate.
上颌切牙管连接口腔顶部与鼻腔底部，其两端分别有切牙孔和鼻腭孔。它与上前牙的紧密相邻会影响即刻种植体植入理想位置的能力。
为避免引发并发症，对其尺寸变异进行研究。
纳入90例使用i-CAT锥形束计算机断层扫描检查的蒙古人种患者的影像。测量鼻腭孔、切牙管和切牙孔的大小以及上颌前部骨厚度。评估管道的方向和走行。
切牙孔的平均唇腭径和近远中径分别为2.80毫米和3.49毫米，而鼻腭孔的唇腭宽度为6.06毫米。切牙管长16.33毫米，宽3.85毫米。上颌前部骨平均厚度为7.63毫米。切牙孔和切牙管的尺寸以及上颌前部骨厚度存在性别差异，男性数值更大。上颌前部骨厚度受年龄影响，但在管道尺寸方面未观察到这种差异。大多数受试者的切牙管呈漏斗状，开口较宽的一端位于上方。与其他地方报道的相比，他们的切牙管似乎有更长的倾斜曲线，中间部分有一个通道，切牙孔开口更窄。
本研究发现性别是影响切牙管及其前方骨量特征的重要因素。男性通常有更大的切牙管和更厚的前部骨。此外，上颌前部骨厚度受年龄影响，即使受试者牙齿完全萌出，随着年龄增长骨也会变薄。
