Er：YAG激光应用于种植体周围炎治疗的临床效果评估

目的：探讨Er：YAG激光( erbium-doped： yttrium aluminium garnet)与机械刮治治疗种植体周围炎的有效性。方法22例种植体周围炎患者，按照单盲随机分组对照原则将种植体分成2组，试验组采用Er：YAG激光照射，激光能量设定为100 mJ/脉冲、频率10 Hz；对照组采用塑料刮治器和0.2%洗必泰抗菌治疗。在基线、3个月和6个月时进行临床牙周指标的检查测定，包括菌斑指数、出血指数、临床附着水平和探诊深度。结果基线时试验组和对照组间各项临床牙周指标的差异无统计学意义(P>0.05)。治疗后3个月(P<0.01)和6个月(P<0.05)，试验组出血指数、菌斑指数和对照组比较差异具有统计学意义；2组探诊深度在治疗后3个月和6个月均有降低，且2组探诊深度的差异均有统计学意义(P<0.05)；然而2组临床附着水平差异无统计学意义(P>0.05)。结论 Er：YAG激光治疗后能显著改善种植体周围炎炎症水平，控制种植体周围炎的有效性优于机械刮治治疗。

Clinical effect evaluation of the application of Er:YAG laser to peri-implantitis

Objective To compare the effectiveness of an Er:YAG laser and mechanical debridement for the treatment of peri-implantitis. Methods 22 cases of peri-implantitis patients were divided into 2 groups according to the single blind randomized control principle. The experimental group was treated by Er:YAG laser irradiation, the laser energy was set to 100 mJ/pulse, frequency of 10 Hz; plastic curette and 0. 2% chlorhexidine antimicrobial therapy was used in the control group. Clinical periodontal index test including plaque index, bleeding index, probing depth and clinical attach-ment level was conducted at baseline, 3 months and 6 months. Results At baseline, the difference of clinical periodon-tal index between the experimental group and the control group had no statistical significance ( P>0. 05) . After 3 months of treatment ( P<0. 01) and 6 months ( P<0. 05) , bleeding index, plaque index of test group and control group had sig-nificant difference. Probing depth was reduced by 3 and 6 months after treatment in both 2 groups, and the probing depth had significant difference ( P<0. 05); while clinical attachment level value showed no statistical significance between the two groups ( P>0. 05) . Conclusion The research shows that the Er:YAG laser treatment can significantly improve peri implant inflammation level, effectiveness of peri-implantitis control is superior than the mechanical curettage treatment.