切牙管、切牙根及鼻底平面三者关系的X线测量研究

Preliminary study of anatomic relation among nasopalatine duct,central incisor root and floor of nosal cavity with X ray measurement

为给正颌外科和种植义齿提供参考依据，作者应用Ｘ线片观测了２９例成人上颌前部的主要解剖结构。观测了切牙管、中切牙根及鼻底平面三者准确的位置关系。结果切牙管前壁至牙槽前壁的平均距离为７．８０±１．４３ｍｍ，切牙管前壁至中切牙长轴的平均距离为４．１５±１．４８ｍｍ，中切牙牙槽窝底至鼻底平面的距离为１２．６２±２．４７ｍｍ，切牙管的平均长度为１５．０４±２．２０ｍｍ，中切牙长轴与鼻底平面相交角为１０４．９±１０．

The authors studied anatomic constructure of anaterior maxilla. They observed the position relationships among nasopalatine duct, central incisor root and floor of nosal cavity through X ray measurement. The results showed: (1)Average distance between the anterior wall of nasopalatine duct and cortical plate of anterior maxilla was 7.80±1.43mm.(2)Average distance between the anterior wall of nasopalatine duct and central incisor root was 4.15±1.48mm. (3)Average distance between the tip of central incisor root and floor of nosal cavity was 12.62±2.47mm. (4)Average length of the nasopalatine duct was 15 04±2.20mm. The results are benefoial of dental implanation and orthognathic surgery.