Süt Ve Daimi Dişlerde Kullanılan Dentin Adezivlerin Universal Özelliklerinin Mikrosızıntı Açısından Değerlendirilmesi
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The evaluation of universal properties of dental adhesive systems in terms of microleakage in primary and permanent teeth. Hacettepe University Health Sciences Institute PhD Thesis in Pediatric Dentistry, Ankara, 2013.The aim of this in vitrostudy was to evaluate the effects of different types of adhesive systems on the microleakage of compomer restorations in Class V cavities. For that purpose; eighty persistant, non-carious primary molar teeth and eighty permanent molar teeth that were extracted for periodontal and ortodontics reasons were used in the study. Teeth divided randomly into two main groups as primary and permanent teeth groups. Then, both groups were divided into eight subgroups in order to form sixteen groups totaly. Standard Class V cavities were prepared at the cervical margin on the buccal surfaces of each tooth. The cavities were randomly assigned into eight groups of 10 teeth each, according to the type of adhesive system applied to the cavities:Group 1: Prime&Bond NT; Group 2: XP Bond; Group 3: Xeno V Bond; Group 4: Clearfil Protect Bond; Group 5: Clearfil S3 Bond; Group 6: G Bond; Group7: Acid etching + Prime&Bond NT; Group 8: Acid etching + XP Bond. All cavities were restored with a compomer, Dyract eXtra, according to manufacturer?s instructions. The compomer was applied in three increments, each being light-cured for 40 s. All restored teeth were placed in deionized water at 37°C for seven days and thermocycled (1000 times at 5°C to 55°C). After thermocycling, marginal leakage was evaluated using a conventional dye penetration method. New three samples were prepared and examined with a scanning electron microscope in order to evaluate dentin-adhesive interface. There were no significant differences among the gingival and occlusal margins of teeth in any of the groups, once all groups were assessed. In primary teeth lowest levels of microleakage were observed in groups 1,2,7 and 8 in which total-etch bonding agents (Prime&Bond NT, Acid+Prime&Bond NT, XP Bond, Acid+XP Bond) were used, regardless of acid etching. In permanent teeth lowest levels of microleakage were observed in groups in which both total-etch systems (Acid Prime&Bond NT, Acid+XP Bond) were applied after acid etching and in two-step self-etch system (Clearfil Protect Bond) grour. While there was no statistically significant difference in terms of gingival and occlusal scores between primary and permanent teeth in Clearfil S3 Bond, Prime&Bond NT, G Bond, XENO V Bond, Acid+XP Bond, XP Bond groups, the scores of permanent teeth was statistically significant lower than the scores of primary teeth in Clearfil Protect Bond and Acid+Prime&BondNTgroups. On the basis of these results, and within the limitations of this in vitro study,it may be concluded that, none of the adhesive systems tested were able to totally prevent the occurrence of microleakage on the occlusal and gingival margin of the class V compomer restorations.