Diş Hekimliği Fakültesi / Faculty of Dentistry

Permanent URI for this collectionhttps://hdl.handle.net/11727/2120

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Subject: search.filters.subject.Fissure sealant

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    Effect of Saliva Contamination on the Sealing Properties of Glass Ionomer Sealants Placed Over Er,Cr:YSGG Laser-Etched Fissures
    (2017) Oter, B. I.; Tirali, R. E.; Ozgul, B. M.; Berk, N.; Cehreli, S. B.; 0000-0001-6487-3984; 29254347; AAD-2907-2020; AAZ-1977-2021; AAD-6138-2021
    Aim This study investigated the effect of laser pretreatment in reducing the microleakage of conventional (GIC) and resin-modified glass ionomer (RMGIC) sealants on saliva-contaminated enamel. Materials and methods Study Design: 80 extracted non-carious third molars were randomly assigned to two groups (n=40/each): Group A enamel pretreatment with erbium, chromium:yttrium, scandium, gallium, garnet (Er,Cr:YSGG) laser; and Group B no pretreatment. Each group was divided into two subgroups (n=20/each) based on presence/absence of saliva contamination following laser pretreatment. In subgroups: fissures were sealed with GIC (n=10) or RMGIC (n=10). Microleakage was evaluated quantitatively using an image analysis toolkit (Image]), and the data were statistically analysed. Results In the absence of laser pretreatment, the GIC sealant demonstrated significantly lower microleakage values than RMGIC counterparts on both uncontaminated and saliva-contaminated enamel (p<0.001, Mann-Whitney U test). Conclusion Among the tested combinations, GIC sealant with Er,Cr:YSGG pretreatment may be the best approach for sealing pits and fissures, when saliva contamination is inevitable before sealant application.
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    Effect of new light curing units on microleakage and microhardness of resin sealants
    (2016) Bani, Mehmet; Tirali, Resmiye Ebru; 27252010
    To determine new developed light curing units with shorter curing times effects on microleakage and microhardness values for resin fissure sealants. Resin filled sealant (UltraSeal-XT), resin unfilled sealant (Delton Type-II) and ormocer-based sealant (Admira-Seal) were light cured with a quartz-tungsten-halogen (QTH), two LED light and a high power LED. Two hundred and forty extracted human molars were randomly allocated into four groups according to used light-curing unit and three subgroups were formed for three different fissure sealant materials. Specimens were immersed in 0.5% basic fuchsia for 24 h, sectioned and examined under a stereomicroscope, and scored for marginal microleakage. Knoop hardness number (KHN) readings were measured after 48 h. Statistical analyses of test were found in significant difference both microleakage and microhardness values between the various light curing units. The time saving approaches in the curing light were determined higher microhardness, although it was found in higher microleakage.