摘要
下颌第一恒磨牙因萌出早,处在左右侧颌骨的中份,所承担的咀嚼功能最大,发生疾病和失牙的概率高。为分析成人下颌第一磨牙拔除原因,进一步了解牙齿外形和根管解剖形态,提高下颌第一磨牙牙周病、牙髓病和根尖周病治疗的成功率,收集成人离体下颌第一磨牙100颗,分析拔除原因;体视显微镜下观察、测量根长及不同部位根管数目和形状,为临床治疗下颌第一磨牙积累资料。
To investigate the reason of extraction, length, number and transverse morphology of the root and root canals of first permanent mandibular molars. 100 extracted first permanent mandibular molars were collected. The length of mesial and distal root of the first perma- nent mandibular molars was 13.00 mm and 13.51 mm separately. 75% double roots and 25% three roots were observed under the stereo- microscope. Difference of root number and shape of transverse morphology in mesial root were more obvious than those in distal roots of the same first mandibular molars in this study.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2009年第4期586-587,共2页
Journal of Practical Stomatology
基金
佛山科学技术学院校内立项资助课题(2007-07)
关键词
下颌第一磨牙
根管
截面形状
First mandibular molar
Root canal
Transverse configuration
