1. The dentist applied an obtundent to numb the patient's gums before starting the procedure.

牙医在开始操作前在患者的牙龈上涂抹了一种减轻疼痛的药物。

2. This topical obtundent is commonly used in dentistry to minimize discomfort during dental procedures.

这种局部麻醉剂在牙科常用于减轻牙医操作过程中的不适感。