AIM: to investigate the morphology of permanent human teeth of the Han Nationality and provide anatomic data for clinical treatmentoftooth and pulp diseases.
目的：了解我国汉族人群恒牙牙体形态特征，为牙体、牙髓病的临床治疗提供解剖学资料。
2
Anyway, they began to give him mental treatment. And in between times they pulled out his teeth, more and more of them, until he didn't have a tooth left in his head.
总之他们开始给他采用精神治疗，还利用治疗间歇期间拔他的牙齿，越拔越多，直到他口中一颗牙也没有了。
3
CONCLUSION: the tooth type or tooth position, root curvature and calcification have significantly influenced the outcome of root canal treatment.