periodontist

1. In one technique, called pocket depth reduction, the periodontist folds back the gum tissue, removes the bacteria, and secures the tissue into place so that it fits more tightly around the teeth.
   在一种叫做腔深度减少的手术，牙周病医师翻起牙龈组织，清除细菌，保证组织回到原位置，让它和牙齿贴合更紧密。
2. But he was a periodontist.
   不过，他是一个牙周医师。
3. One that sets written material into type; a typesetter. A dental implant is an artificial tooth root that a periodontist places into your jaw to hold a replacement tooth or bridge.
   排字工把书面材料置于版面上的工人；排版工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。
4. Gum disease can be treated by a special dentist called a periodontist.
   牙周病可由特殊的牙周病医师来治疗。

noun

1. a dentist specializing in diseases of the gums and other structure surrounding the teeth