exodontology

例句：

1. 1.Exodontology is the study of teeth and gums.
   牙外科学是研究牙齿和牙龈的学科。
2. 2. He specializes in treating toothaches with acupuncture.
   他专门用针灸治疗牙痛。
3. 3.The dentist performed an emergency root canal on my tooth.
   牙医为我那颗牙进行了紧急根管治疗。