periodontal index

例句：

1. 1.The dentist used the periodontal index to assess the patient's oral health.
   牙医使用牙周指数来评估患者的口腔健康状况。
2. 2. The study found a significant correlation between the periodontal index and the risk of gum disease.
   研究发现牙周指数与牙龈疾病的风险之间存在显著的相关性。
3. 3. The researcher analyzed the data from the periodontal index and determined the effectiveness of the treatment.
   研究者分析了来自牙周指数的数据，并确定了治疗的有效性。