circumoral crown

例句：

1. 1.The tooth's circumoral crown is visible through the gums.
   这颗牙齿的齿状冠通过牙龈可见。
2. 2.The circumoral crown of the molar is larger than that of the canine.
   磨牙的齿状冠比犬齿的要大。
3. 3. The circumoral crown is a key feature in determining the size of the tooth.
   齿状冠是确定牙齿大小的关键特征。