peridontal knife 牙龈刀

peridontal disease 牙周病

peridontal ligament 牙周膜

peridontal abscess 牙周脓肿

Peridontal maintenance 牙周维护治疗

peridontal membrane 牙周膜

peridontal and pulp 牙周牙髓组织

Community Peridontal Index 社区牙周指数

peridontal ligament detail 垩质