RESUMO
Objective:To observe the effects of Er ∶YAG(erbium:yttrium-aluminum-garnet) laser combined with diode laser in the treatment of chronic periodontitis.Methods:30 patients with chronic periodontitis patients were treated by mechanical scaling and root planning(SRP),pure Er ∶ YAG laser(ERT),diode + Er ∶ YAG + diode laser therapy(TPT) respectively.In the treatment VAS pain score was recorded.Probing deepth (PD),clinical attachment level (CAL) and bleeding on probing (BOP) were examined,IL-1 β,TNF-α and b-FGF in GCF,Porphyromonas gingivalis(Pg) in subgingiva plaqure were measured before and after treatment.Data were analyzed by SPSS 21.0 software.Results:6 weeks,12 weeks after treatment PD,BOP and CAL in TPT group were lower than those in ERT and SRP groups(P ＜0.05),TGF-β and b-FGF in TPT group were higher,IL-1β and TNF-α were lower than those in ERT and SRP groups (P ＜ 0.05).The content of Pg relative to total bacteria in TPT group were lower than that in ERT and SRP groups (P ＜ 0.05),VAS value in twinlight laser group was significantly lower than hand instruments group(P ＜ 0.05).Conclusion:The twinlight laser is effective in the treatment of periodontitis.
RESUMO
Objective To compare the effectiveness,indications and side effect between microplasma technology (MPT) and 2940 nm Er ∶ YAG laser for treatment of burn scar.Methods 265 patients with hypertrophic scar were treated with MPT (MPT group,N=136) and Er ∶ YAG laser (Er ∶ YAG laser group,N=129).The patients were treated 2-6 times.Results The significant response rate was 73.52 ％ and 44.95 ％ in MPT group and Er ∶ YAG laser group; the cure rate was 28.67 ％ and 15.50 ％ in MPT group and Er ∶ YAG group,respectively.There was no statistically significant difference between two groups (P＞0.05).For moderate burn scar patients (93 cases),the significant response rate was 62.79 ％ and 10.00 ％ in MPT group and Er ∶ YAG laser group,respectively.There was significant difference between two groups (P＜0.05).Conclusions MPT and Er ∶ YAG laser has been proven to be effective and safe for the treatment of burn scar.The effectiveness of MPT is superior to Er ∶ YAG laser in treatment of moderate burn scar.