Nd:YAG激光治疗对慢性牙周炎患者牙周袋深度和附着丧失的改善效果研究

Effects of Nd:YAG laser treatment on recovery of periodontal pockets and clinical attachment level of chronic periodontitis patients

目的评价脉冲Nd:YAG激光治疗慢性牙周炎患者牙周袋深度(PD)和附着丧失(AL)的效果。方法选择2008年1—6月在福建医科大学附属协和医院就诊的45例慢性牙周炎患者,每例患者至少有4个以上≥6mm的牙周袋并且分布在2个以上口腔区域内,在接受基础检查和龈上洁治术后,随机分成3组。A组(15例):单纯接受龈下刮治和根面平整(SRP)治疗;B组(15例):SRP+1次激光照射治疗(Nd:YAG激光,输出功率2W,照射时间40s);C组(15例):SRP+2次激光照射治疗(Nd:YAG激光,第1次照射输出功率2W,照射时间40s;第2次照射输出功率1W,照射时间20s)。每组各选择40个位点。统计在基础检查,治疗2、4和12周时各组的PD和AL。结果从第2周时,3组的PD均明显减小。而AL的改善在第4周时可以明显观察到,且C组的效果最为明显,并一直延续到12周。结论SRP基础上辅助2次不同能量的激光治疗对慢性牙周炎PD和AL的改善效果均明显优于单独SRP使用。

Objective To determine the recovery effect of6mm periodontal pockets depth（PD） and clinical attachment level（CAL） treated with Nd：YAG laser in a randomized and blinded clinical trial. Mehtods Totally 45 subjects[each with≥4sites of PD≥6mm,in≥2 quadrants]were enrolled in the study.After baseline examination ,all subjects received scaling and root planing（SRP） and were then randomly assigned to one of three groups. Each group had 40 sites.Group A received SRP treatment;Group B received SRP＋ Nd：YAG laser treatment（2W 40s）at baseline;Group C received SRP＋ Nd：YAG laser treatment（2W 40s）at baseline＋ Nd：YAG laser treatment（1W 20s）at 2weeks.Results Compared with baseline ,decreased PD was obseved in all 3 groups after treamemt from 2 to 12 weeks,but no significant difference in three groups.Four weeks later ,decreased AL was observed in all 3 groups after treamemt,and the recovery level in Group C was significantly higher（P 0.05） than that in Group A and B,and the effect lasted 12weeks. Conclusion Under conditions of this study,two times of different energy of Nd：YAG laser treatmemt after SRP significantly increase the recovery level of PD and AL.