颏管的解剖学研究

The Anatomical Study of the Mental Canal

应用国际上先进的、具有高分辨率的Ｓｅｎｓ－Ａ－Ｒａｙ新技术，对２４例（４８侧）游离干下颌骨标本的下颌管前部结构进行放射投照及计算机测量分析。结果表明：下颌管的前端确有一骨内前绊（颏管）延伸至颏孔前方，继而向后上外方通向颏孔，而并非如过去一般认为的下颌管自后上内向前下外方向直接开口于颏孔。本研究对颏管与颏孔及下颌管之间的关系、颏管的角度等提供了解剖学数据，为临床上颏孔区手术，特别是牙种植术提供了新的解剖学资料。

The anatomical siructure of the front part of the inferior alveolar canal (IAC) of 24 free adult mandibles were radiographed and made measurement and analysis by using the internationally advanced Send-A-Ray technique with high resolving ability. The results show that there is indeed an intraosseous anterior loop in the front part of IAC which extends beyond the dental foramen. This study prvides a new anatomical reference for clinical operation, especially for the Placement of dental implants into the anterior mandible.