牙周病可由特殊的牙周病医师来治疗。

Gum disease can be treated by a special dentist called a periodontist.

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在一种叫做翻瓣术的手术，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。

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.

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治疗下颚第二大臼齿远心侧的环绕型骨性破坏，是牙周病科医师的一大挑战。

Treatment of deep circumferential bony defects around the mandibular secondary molars is a great challenge to periodontist.

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