first bicuspid

Objective To find out the changes of the soft tissue profile in Guangdong women with Angle's I teeth uncovered by lips after extraction of 4 first bicuspid teeth and to evaluate its significance.

目的了解广东成年女性安氏Ⅰ类开唇露齿患者拔除4个第1双尖牙矫正后软组织侧貌变化情况，评价该类患者矫正后软组织变化的意义。

Methods: A right handed patient with cold stimulated dentinalgia of the first right maxillary bicuspid was selected to perform the fMRI study. Other tooth pulp disease and oral metal restoration were excluded.

方法：选取右利手右上颌第一双尖牙牙髓冷刺激痛患者1名，排除口内的其它牙髓病变及金属充填、修复体。

BI of upper left first bicuspid was the highest, and the upper left incisor was the lowest.

左侧上颌中切牙的BI最小；左侧上颌第一前磨牙的BI最大；

Most of wedge-shaped defects were found at first bicuspid teeth.

楔状缺状发病率最高的是第一双尖牙；