60 cases(aged 18-40 years) underwent orthodontic treatment were divided into 2 groups.30 patients in group A were treated with invisible aligners,while 30 in group B with fixed orthodontic appliance.Periodontal indices (PI,GI,SBI,PD)were examined before treatment,6 weekes,6 months and 12 months after treatment.Before and 6 weeks after treatment the indices were not statistically different between groups,6 and 12 months after treatment the indices of group A were lower than those of group B (P ＜ 0.05).The invisalign appliance is more propitious to periodontal health than the fixed orthodontic appliance.%纳入18 ～40岁正畸患者60例,A组30例为无托槽隐形矫治组,B组30例为传统固定矫治组,分别检测患者治疗前和治疗后6周、6个月和12个月的各项牙周指数(PI,GI,SBI,PD).治疗前和治疗后6周各项指数组间差异无统计学意义,治疗6月和12月后A组各项指数均低于B组(P＜0.05),无托槽隐形矫治器更有利于牙周组织的健康.
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