periodontal trauma

例句：

1. 1.He suffered from periodontal trauma after losing his teeth.
   他在失去牙齿后遭受了牙周创伤。
2. 2.The dentist advised him to take care of his gums to prevent periodontal trauma.
   牙医建议他注意口腔卫生以防止牙周创伤。
3. 3. The patient had to undergo surgery to treat the severe periodontal trauma.
   患者不得不接受手术来治疗严重的牙周创伤。