摘要
目的:研究离体单根的上颌第二前磨牙根尖1～6mm处根管形态及根管峡部的发生率和位置的情况。方法:收集离体上颌第二前磨牙60颗,自根尖开始,片切去除1mm牙根后,用美蓝染色根切面,在显微镜下观察并记录各横截面的根管数和峡部分布情况。在距根尖1～6mm区域内每隔1mm处重复以上操作。结果:上颌第二前磨牙双根管率是41.67%;根管峡部在距根尖4mm水平最高。结论:上颌第二前磨牙根管峡部在距根尖3～5mm区最高发;根尖1～6mm区域根管系统形态复杂。
Objective： To investigate the root canal configuration and the incidence and location of the isthmus in extracted maxillary second premolar with single root. Methods： 60 maxillary second premolars were included in the study. 1 mm root was cut from the apical end of root. The transverse section was stained with methylene blue dye and viewed with a surgical operating microscope. 1 mm increment sections were made and stained and observed by the same way from apex to 6 mm. The number of canals as well as the type of canal isthmuses were recorded. Re- suits： 41.67% maxillary second premolar with single root had two canals. Canal isthmus happened more frequently in the apical 4 mm levels. Conclusion ： The incidence of isthmus in the maxillary second premolar was highest in the apical 3-to 5-mm level. Canal morphology in the apical 1-to 6-mm is complicated.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2007年第6期848-851,共4页
Journal of Practical Stomatology
关键词
前磨牙
根管峡
发生率
Premolar
Canal isthmus
Incidence
