In vitro evaluation of enamel demineralization around the brackets after Er-YAG laser irradiation and flouride application

Abstract

Objective: The aim of this in vitro study was to investigate the effects of a fluoridated agent and Er:YAG irradiation with different doses, alone or in combination, on enamel resistance to demineralization. Materials and Methods: This study consisted of 80 premolars divided into eight groups: G1, untreated (control); G2, Acidic Phosphate Fluoride (APF) for 4 min; G3, 0.50 W Er:YAG laser; G4, 0.50 W Er:YAG laser + APF; G5, 0.75 W Er:YAG laser; G6, 0.75 W Er:YAG laser + APF; G7, 1 W Er:YAG laser; G8, 1 W Er:YAG laser + APF. Brackets were bonded to the buccal surfaces of premolars, and demineralization values were measured before and after treatment from the gingival aspects of the brackets, with DIAGNOdent. In last timepoint surface roughness was detected with Atomic Force Microscopy (AFM). All groups were subjected to 5 and 9 days of pH-cycling to produce artificial carious lesions. Data were tested using the Kruskal-Wallis, Friedman and Duncan tests (p<0.05). Results: G1 and G7 demonstrated significant demineralization when compared to the initial measurements to 5th day measurement (p<0.05). The other groups did not reveal significant changes in the demineralization values (p>0.05). The best surface was observed in the AFM records of group 4. Conclusion: Optimum Er:YAG laser irradiation with settings has a positive effect on the decrease in demineralization.

Keywords

• Bracket,Demineralization,Er-YAG laser,Flouride

Braket çevresindeki mine demineralizasyonunun Er-YAG lazer ve florid uygulaması sonrası in-vitro olarak değerlendirilmesi

Abstract

Amaç: Bu in-vitro çalışmanın amacı; birlikte ve ayrı ayrı florür ve farklı dozlarda Er:YAG lazer uygulamalarının, braket çevresindeki mine yüzeyinde oluşan demineralizasyona karşı etkilerini incelemektir. Gereç ve Yöntem: Bu çalışmada 80 üst daimi 1. premolar 8 grup olarak ayrılmıştır: G1, kontrol; G2, asidik fosfat florit (AFF); G3, 0.50 W Er:YAG lazer ; G4, 0.50 W Er:YAG lazer + AFF; G5, 0.75 W Er:YAG lazer; G6, 0.75 W Er:YAG lazer + AFF; G7, 1 W Er:YAG lazer; G8, 1 W Er:YAG lazer + AFF. Braketler premolarların bukkal yüzeylerine yapıştırılmıştır. Demineralizasyon değerleri dişin gingival ve braket arasındaki bölgede DIAGNOdent yardımıyla ölçülmüştür. Son ölçümde yüzey düzensizliği Atomik Kuvvet Mikroskobu (AKM) ile belirlenmiştir. Yapay çürük lezyonu oluşturmak için tüm gruplar 5 ve 9 günlük pH siklusuna tabi tutulmuştur. Veriler Kruskal-Wallis, Friedman and Duncan istatistik testleri kullanılarak analiz edilmiştir (p<0.05). Bulgular: G1 and G7 gruplarında istatistiksel olarak önemli derecede demineralizasyon görülmüştür (p<0.05). Diğer grupların demineralizasyon değerlerinde istatistiksel olarak önemli değişiklikler görülmemiştir (p>0.05). AFM kayıtlarında en iyi yüzey görüntüsü grup 4’te saptanmıştır.

Sonuç: Uygun dozlarda Er-YAG lazer uygulamalarının demineralizasyon üzerine pozitif etkileri bulunmaktadır.

Keywords

• Braket,Demineralizasyon,Er-YAG lazer,Florür

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