Comparison of shear bond strength and bonding time of metal flash free orthodontic bracket

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: İstanbul Yeni Yüzyıl Üniversitesi, Sağlık Bilimleri Enstitüsü, ORTODONTİ ANABİLİM DALI, Türkiye

Tezin Onay Tarihi: 2018

Tezin Dili: İngilizce

Öğrenci: ALI M.A. BENAROS

Danışman: MUSTAFA HALUK İŞERİ

Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu

Özet:

Purpose: The purpose of this in vitro study is to compare the shear bond strength and bonding time between metal flash-free brackets and conventional metal brackets. Remaining adhesive following removal of orthodontic brackets was also assessed. Materials and Methods: Forty five intact human premolars (N =45, n = 15 per group) were selected and randomly divided into three groups. Group1: Smart clip brackets used as control group, Group 2: Smart clip APC II flash-free adhesive coated brackets used as first experimental group, Group 3: Smart clip APC plus adhesive coated brackets used as second experimental group. The bonding time was calculated after the teeth were prepared until the brackets placed in the ideal position in seconds. Shear bond strength (SBS) for each sample was measured. Samples were then examined under X 8 magnification light microscopy to assess the remaining adhesive. The shear bond strength, bonding time and remaining adhesive of each group were statistically compared using t-test p<0.05. Results: The mean bonding time of smart clip group (40.1140) had significantly difference when compared with APC II group (31.0560) (p=0.00), and did not show significant difference when compared with the smart clip APC plus (39.5431) group (p=0.638). The mean shear bond strength of smart clip group had significantly higher mean shear bond strength value (11.25120) when compared with APC II (9.42347) and APC plus (8.42867) group (p=0.00 , p=0.00 respectively). The mean residual adhesive of smart clip group (1.73) did not show significant difference when compared with APC II group (1.93) (p=0.558). The mean ARI of smart clip group had significantly higher mean ARI value (1.73) when compared with APC plus (0.87) group (p=0.033). onclusions: APC flash-free adhesive coated bracket systems had shear bond strength clinically acceptable. The APC flash free adhesive system is able to decrease the time needed for orthodontic bracket bonding. More adhesive remaining on the bracket appear to be favorable to save chair time during debonding but increase the risk of enamel surface damage due to enamel fracture on bracket removal. Key words: Flash free b