All parameters including plaque index(PI), probing depth(PD), attachment loss(AL) and bleeding on probing(BOP) were measured at baseline, 4 and 7 weeks after treatment.

• 在基线、4周和7周时分别检测菌斑指数(PI)、探诊深度(PD)、附著丧失(AL)和探诊出血(BOP)等牙周病的临床指标。