apical dental ligament

例句：

1. 1.The apical dental ligament is responsible for holding the tooth in place.
   牙髓的顶端纤维束负责固定牙齿。
2. 2. The apical dental ligament can be damaged by trauma or infection.
   牙髓的顶端纤维束可以因创伤或感染而受损。
3. 3.The apical dental ligament is a critical structure that supports the tooth and protects it from damage.
   牙髓的顶端纤维束是一个关键的结构，它支撑着牙齿并保护它免受损伤。