Impacted tooth frequently appears in upper cuspid and upper central incisors(except of the third molar) .

较常见的是尖牙和上颌切牙的埋伏阻生（第三磨牙除外）。

Taxol content in needle and swig of Taxus yunnanensis was the highest within four species from East Asia area, Taxus cuspid…

短叶醇含量则以短叶红豆杉针叶最高，东北红豆杉及云南红豆杉次之。

Objective: To study the tooth size correlation between permanent cuspid and bicuspid group and other teeth groups in malocclusion.

目的：研究错牙合、正常牙合的尖牙、双尖牙组与其它组牙的相关性，为尖牙、双尖牙组的预测提供科学依据。

Conclusion: Predicting the tooth size of cuspid and bicuspid group in malocclusion can't simply follow the law of normal occlusion.

结论：临床上对错尖牙、双尖牙组的预测不能简单等同于正常。

Methods: a 3-d FEM model of lower cuspid was established by using DICOMdata and stimulant mechanical experiment was carried out on the model.

方法：利用DICOM数据建模法，建立下尖牙的三维有限元模型，模拟力学实验。