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Braket Altında Oluşan Mikrosızıntının Dört Farklı Bonding TekniğindeTermal Siklus ve Çiğneme Similatörü Yöntemleri ile Karşılaştırmalı Olarak Değerlendirilmesi

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dc.contributor.advisorYılmaz, Berza
dc.contributor.authorOk, Ufuk
dc.date.accessioned2020-07-16T06:28:34Z
dc.date.available2020-07-16T06:28:34Z
dc.date.issued2017en
dc.descriptionThesis (Doctoral)--Bezmialem Vakıf University, Orthodontics Department, Istanbul, 2017en
dc.description.abstractThe microleakage caused by the shrinkage of the adhesive related to the polymerization reaction causes weakening of the connection between the bracket and the tooth surface and leads to the penetration of bacteria. Increased microleakage in the shrinkage zone causes also decalcification, enamel coloring, corrosion and secondary decays. The adhesives used to bond brackets are subjected to the chewing forces and their physical integrty is affected by the thermal changes in the mouth environment. Chewing forces are transmitted directly to the teeth or indirectly through brackets and adhesives or the arch wire. Structural deterioration may occur on the adhesive because of the chewing forces. There are studies showing that these microcracks allow penetration of the oral fluids. In thepresent study, the efficiency on microleakage of asid etch, self etch and two different laser methods was evaluated in comparison. In our study, the enamel surface of 160 extracted teeth was etchedwith acid, self etch adhesives, Er:YAG laser and X-Runner handpiece appliactions. After bondingthe brackets to the specimens, 0.016X0.022 inch nickel titanium arch wire was ligatureted, samples were embedded in autopolymerizing acrylic blocks with imitated periodontal ligament. The specimens were aged with either chewing simulator and thermal cyclingor only thermal cycling procedures. Microleakage amount in milimeters between enamel-adhesive and adhesive-bracket surfaces was recorded for occlusal and gingival sections in each specimen. The median and mean values of microleakage were evaluated with Kruskall Wallis and Mann Withney tests respectively, (p <0.05). Microleakage measured in the gingival part of enamel and adhesive surfaces of the samples aged with chewing simulator was significantly higher. The half of the samples was aged with chewing simulator and thermal cycling procedures while the other half was aged only with thermal cycling. The microleakage values were found to be higher in samples aged with chewing simulator and thermal cycling procedures. The correct simulation of the oral conditions can be crucial to assess and understand the performance of the adhesive materials in laboratory tests.en
dc.identifier.urihttps://hdl.handle.net/20.500.12645/18212
dc.language.isoenen
dc.publisherBezmialem Vakıf Universityen
dc.subjectDiş Hekimliği = Dentistrytr_TR
dc.subjectBenzetim = Simulationtr_TR
dc.subjectDental bonding = Dental bondingtr_TR
dc.subjectDental mine = Dental enameltr_TR
dc.subjectDental sızma = Dental leakagetr_TR
dc.subjectLazer tedavisi = Laser therapytr_TR
dc.subjectOrtodontik aygıtlar = Orthodontic appliancestr_TR
dc.subjectOrtodontik braketler = Orthodontic bracketstr_TR
dc.subjectÇiğneme = Masticationtr_TR
dc.subjectOrtodonti = Orthodonticstr_TR
dc.titleBraket Altında Oluşan Mikrosızıntının Dört Farklı Bonding TekniğindeTermal Siklus ve Çiğneme Similatörü Yöntemleri ile Karşılaştırmalı Olarak Değerlendirilmesitr_TR
dc.typeThesis Doctoralen
dspace.entity.typePublication
local.thesis.programnameOrthodontics Programen
local.thesis.termBahar Dönemitr_TR
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