lower third molar

例句：

1. 1. Thedentist removed the lower third molar andperformed a root canal treatment.
   牙医移除了下第三磨牙，并进行了根管治疗。
2. 2. During the extraction ofthe lower third molar, the patientexperienced some discomfort.
   在移除下第三磨牙的过程中，患者感到了一些不适。
3. 3. Thelower third molar is responsible for grindingfood and aiding in digestion.
   下第三磨牙负责研磨食物并辅助消化。