切牙管

切牙管应用解剖研究

Applied anatomy study of nasopalatine duct

切牙管之方向几乎全为直的。其长度平均值为12.17±0.28毫米。

The incisive canal is nearly ventral and its mean lenght is 12.17 ± 0.28 mm .

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

目的：测量切牙管及邻近骨性结构，为切牙区种植体植入提供参考依据。方法：以游标卡尺等测量工具对73例上颌骨标本的切牙管进行实体定量测量。

Objective : To study the anatomic structure of the nasopalatine duct and the neighboring bone , provide reference for implant surgery in the incisor region .

切牙神经管的解剖学特点

The Anatomical Feature of the Incisor Nerve Canal

切牙神经管内为切牙神经，主要分布到下颌前牙。

It is about 9.53 ± 1.43 mm vertically from the superior border of the incisor nerve canal and mainly spreads to the anterior teeth .

结果下颌管前端分出同一方向前行的切牙神经管和向后、上、外转弯的颏管。

Results The anterior end of the mandibular canal is divided into two canals : incisor never canal , which spreads forward in same direction .

目的研究国人切牙神经管的位置及下颌管、颏管的关系，为临床手术提供解剖学数据。

Objective To study the feature of the incisor nerve canal and its relation to the mandibular canal and mental canal so as to offer a reliable anatomical data for the distric operation .

方法：磨开13例（26侧）甲醛溶液固定的湿下颌骨标本的下颌管前段、颏管和切牙神经管始段，直接观察测量。

Methods : The anterior parts of the mandibular canal , the mental canal and the origin of the incisor nerve canal were dissected and measured directly on 13 cases of Chinese wet mandible specimens fixed with formalin .

下颌侧切牙双根管一例报告

Double root canal of mandibular lateral incisor : a case report

不同投照角度X线片诊断下颌切牙双根管的评价

Evaluation of Altering X-ray Projection Angulation for Successful Twin Canal Diagnosis in Mandibular Incisors

中、侧切牙双根管率分别为35.9%和27.5%；

The double root canal was found in 35.9 % of central incisors and in 27.5 % of lateral incisors .

但有资料表明下颌切牙的根管解剖形态较为复杂，变异较多。

However , some research data show that mandibular incisors ' root canal anatomy is comparatively complex , and root canal system has many variations .

影响根管治疗难度的主要因素为：中切牙为根管弯曲、侧切牙为根管弯曲和钙化、尖牙为过长牙。

The major risk factors were root canal curvature in maxillary central incisor , root canal curvature and calcification in maxillary lateral incisors , and supra length in maxillary canines , respectively .

结果中国人下颌恒切牙为单根管和双根管，根冠段、根中段及根尖段双根管检出率分别为22.5%，30.0%，15.0%；

Results The double root canal comprised 22.5 % , 30.0 % , and 15.0 % in crown third , middle third , and apical third root canals of the mandibular permanent incisors , respectively .

国人切牙孔和切牙管的观察与测量

Measurement and Observation of Incisive foramen and Incisive Canal in Chinese

结论下颌恒切牙以弯曲根管为主，唇舌向弯曲程度大于近远中向弯曲程度。

Conclusion Most of the root canals in mandibular permanent incisors are curve .

结论：切牙管区种植体植入方向应与切牙管平行，与鼻底平面成约115°角；切牙管前部牙槽骨较薄，宜植入直径为4mm以下的种植体。

The bone in front of nasopalatine duct was thin , the diameter of implants applied here should be less than 4 mm .