periodontosis

例句：

1. 1. The patient had developed periodontosis, which required immediate treatment.
   患者患上了牙周病，需要立即治疗。
2. 2. Periodontosis is a common cause of tooth loss in adults.
   牙周病是成年人牙齿丧失的常见原因。
3. 3. The dentist advised the patient to maintain good oral hygiene to prevent further progression of periodontosis.
   牙医建议病人保持良好的口腔卫生，以防止牙周病的进一步恶化。