periodontal attachment

例句：

1. 1. The dentist needs to remove the tartar and periodontal disease before treating the patient.
   牙医需要在治疗患者之前清除牙石和牙周病。
2. 2. The patient's teeth were severely affected by periodontal disease, which required aggressive treatment.
   患者的牙齿严重受到牙周病的影响，需要积极的治疗。
3. 3. Periodontal disease is a major cause of tooth loss in adults.
   牙周病是成年人牙齿丧失的主要原因。