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Comparative evaluation of the effect of Er:YAG laser and low level laser irradiation combined with CPP-ACPF cream on treatment of enamel caries

机译：Er：YAG激光和弱激光联合CPP-ACPF乳膏治疗釉质龋的效果比较评估

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Objectives: This study investigated the effectiveness of low power red and infrared lasers and that of Er:YAG laser,in association with CPP-ACPF cream, on remineralization of white spot lesions.Study Design: Fifty intact premolars were immersed in a demineralization solution for 10 weeks to induce carieslike lesions and then were divided into five groups. In group 1, the teeth were covered with a CPP-ACPF creamfor 3 minutes and then irradiated with a low power red laser (660 nm, 200 mW) for 1 minute through the cream. Ingroup 2, the treatment was the same as that in group 1, but an infrared laser (810 nm, 200 mW) was employed. Thespecimens in group 3 were irradiated with an Er:YAG laser (100 mJ, 10 Hz) combined with CPP-ACPF. In group4, the CPP-ACPF cream was applied for 4 minutes and group 5 was submitted to neither laser nor CPP-ACPF. Themicro Vickers hardness was compared at 20, 60 and 100 ì from the enamel surface among the groups.Results: The highest microhardness was observed in the low power red and Er:YAG laser groups and the lowestone belonged to the CPP-ACPF alone and control groups. However, no significant difference was found in microhardnessof the experimental groups at any of the evaluation depths (p>0.05).Conclusion: With the laser parameters used in this study, neither the combined application of Er:YAG laser withCPP-ACPF nor the combination of low power lasers with CPP-ACPF provided a significant increase in remineralizationof enamel caries.
机译：目的：本研究探讨了低功率红光和红外激光以及Er：YAG激光与CPP-ACPF乳膏联合对白斑病变再矿化的有效性。研究设计：将五十个完整的前磨牙浸入去矿物质溶液中，以消除白斑病变。诱发龋齿状病变10周，然后分为5组。在第1组中，用CPP-ACPF乳霜覆盖牙齿3分钟，然后用低功率红色激光（660 nm，200 mW）照射乳霜1分钟。在第2组中，治疗与第1组相同，但是使用了红外激光（810 nm，200 mW）。第三组标本用Er：YAG激光（100 mJ，10 Hz）结合CPP-ACPF辐照。在第4组中，应用CPP-ACPF乳膏4分钟，第5组未使用激光或CPP-ACPF。比较各组在釉质表面20、60和100处的显微维氏硬度。结果：在低功率红光和Er：YAG激光组中观察到最高显微硬度，最低的分别属于CPP-ACPF和对照组。组。但是，在任何评估深度下，实验组的显微硬度均无显着差异（p> 0.05）。结论：利用本研究中使用的激光参数，既没有将Er：YAG激光与CPP-ACPF结合使用，也没有结合使用使用CPP-ACPF的低功率激光器的使用显着增加了龋齿的再矿化作用。

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