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Efficacy of photodynamic therapy vs ultrasonic scaler for preventing gingival inflammation and white spot lesions during orthodontic treatment
摘要： The effectiveness of Photodynamic therapy (PDT) was compared vs ultrasonic scaler (US) as prophylactic methods for oral decontamination during the orthodontic treatment. There were no statistically significant differences in FMPS, FMBS, PD, ICDAS scores and counts of P. gingivalis, P.intermedia and mutans streptococci at T1, T2 and T3 follow-ups. Based in the protocol designed, PDT and US allowed in a similar way to control the extent of the enamel demineralization until 6 months post-treatment and the progression of the gingival inflammation until 9 months post-treatment.
关键词： gingival inflammation,ultrasonic scaler,orthodontics,Photodynamic therapy,white spots
更新于2025-09-23 15:21:01
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Effect of CO2 laser (10.6????m) and Remin Pro on microhardness of enamel white spot lesions
摘要： This study investigated the combined effect of CO2 laser irradiation and Remin Pro paste on microhardness of enamel white spot lesions (WSLs). Seventy-eight intact premolars were randomly assigned into six groups and then stored in a demineralizing solution to create WSLs. Afterwards, the teeth in group 6 (negative control) remained untreated, while groups 1 and 4 were exposed to CO2 laser irradiation (20 Hz, 1 W, 30 s) and Remin Pro paste, respectively. In groups 2 and 3, the teeth were exposed to laser either before (group 2) or after (group 3) Remin Pro application. The teeth in groups 1 to 5 were then immersed in artificial saliva for 90 days while subjected to fluoride mouthwash and weekly brushing. Finally, the teeth were sectioned, and Vickers microhardness was measured at the enamel surface and at 50, 100, and 150 μm from the surface. One sample of each group was also examined with scanning electron microscope (SEM). Data were analyzed by two-way analysis of variance (ANOVA) and Tukey’s test. The significance was set at 0.05. Laser irradiation followed by Remin Pro application (group 2) caused a significant increase in total WSLs’ microhardness compared with laser alone (group 1) and control groups (P < 0.05). Microhardness at depths of 100 and 150 μm was also significantly greater in group 2 compared with those of group 3 and control groups (P < 0.05). Combined application of CO2 laser with Remin Pro paste, when laser is irradiated before the paste, is suggested for re-hardening of WSLs in deep layers of enamel.
关键词： Tooth remineralization,White spots,CO2 laser
更新于2025-09-19 17:13:59