摘要
目的:观察下颌第二磨牙牙根及根管类型。方法:收集临床上拔除的下颌第二磨牙86颗,通过透明牙方法,观察牙根的分类、根管的分型和侧副根管的发生情况。结果:86颗下颌第二磨牙中,有44颗双根牙,36颗融合牙,6颗三根牙。双根牙中,近中根管以2-2型居多,其次为1-1型,远中根管大部分为1-1型根管。36个融合牙中,C型根10个,2例近远中完全融合形成2-1型根管,剩余近远中有独立2根管,24例中近远中根管以1-1型常见。无论牙根形态如何,近中根管均有广泛的根管交通;结论:下颌第二磨牙牙根和根管形态具有多样性,给临床根管治疗带来困难。
Objective:To research regularity and significance on the root shape of mandibular second molars.Method:86 mandibular second molars were collected and classified and counted according to dental root-shapes and types of canals.Result:The mandibular second molars were divided into three types-double roots,three roots and fusedroot.There are double roots 51.1 %,three roots 7.0% and fusedroot 41.9 % in the specimen.In the mesial root of 44 double roots,the most common configuration types were type 2-2.In the distal root of these teeth,type 1-1 is the most frequent type.There are 10 C-shape canals among 36 fusion teeth.The prevalance of type 1-1 of the rest 24 fusion teeth which have separate mesial and distal canals is the highest.Despite of root morphology,accessory canals exist widely in mesial canals.Conclusion:The varieties of root and canals morphology have a relationship to root canal treatment.
出处
《临床口腔医学杂志》
2015年第7期415-417,共3页
Journal of Clinical Stomatology
关键词
下颌第二磨牙
牙根
透明牙
根管
形态学
mandibular second molar
dental root
root canal
transparent teeth.
morphology