periodontia 牙周專業學
peri·odon·tia /ˌpɛrɪoˈdɑnʧ(ɪ)ə/ 名詞 (單periodontium)牙周組織,牙槽骨膜,牙周病學
periodontia n : the branch of dentistry dealing with diseases of the gums and other structures around the teeth [syn: periodontics]