tooth lock washer

例句：

1. 1. This tooth lock washer is designed to fit perfectly into the gap between your teeth and gums.
   这种牙锁密封剂设计得可以完美地贴合在牙齿和牙龈之间的缝隙中。
2. 2. The dentist used a tooth lock washer to fill in the gaps left by old fillings.
   牙医使用牙锁密封剂来填补旧填充物留下的空隙。
3. 3. After the procedure, the dentist applied a tooth lock washer to ensure that the area was completely sealed.
   手术完成后，牙医将牙锁密封剂涂抹在需要密封的区域，以确保完全封闭。