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。