1.You may want to see a periodontist -- a dentist who specializes in gum disease -- if your gum problems persist or seem to get worse.
如果你的牙龈问题持续存在或似乎变严重了，你可能要见一个专攻牙龈疾病的牙周学医生。
2.Her recall visit intervals to the periodontist were twice yearly.
她每年去牙周科医生那里复诊两次。
3.a dental implant is an artificial tooth root that a periodontist places into your jaw to hold a replacement tooth or bridge
种植牙是一种通过专科医生植入颌骨的人工牙根，用以镶复牙冠或牙桥