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    Öğe
    A comparison of the water absorption and water solubility values of four different composite resin materials
    (Cumhuriyet University Faculty of Dentistry, 2018) Cangül S.; Adigüzel Ö.; Tekin S.; Öztekin F.; Satici Ö.
    Objectives: The aim of this study was to compare the water absorption and water solubility of four different composte resin materials. Materials and Methods: A total of 40 cylindrical discs were prepared and polymerised with light, as 10 from each group, each sample 2 mm in depth and 8 mm in diameter. The samples were kept for 24 hrs in a dessicator until a stable weight was reached. Then, the weight of each sample was measured on highly sensitive scales. To calculate the water absorption and solubility, measurements were made again with the sensitive scales at the end of 1, 7 and 30 days. The data obtained were evaluated with One-Way ANOVA variance analysis and the Friedman test. Results: As a result of the statistical analyses, significant differences were determined between the composite resins in respect of water absorption on days 7 and 30 and in respect of solubility on day 30 only (p < 0.05). Conclusion: When the water absorption and water solubility of composite resins at the end of 30 days were evaluated statistically, it was observed that Ceram X One material showed the lowest values. This is related to the structure of the restorative material. It can be concluded that the negative mechanical, physical and biological effects created by the water absorption and water solubility factors of restorative materials are important issues that should be taken into consideration. © 2018 Cumhuriyet University Faculty of Dentistry.Amaç: Bu çalişmanin amaci estetik amaçli kullanilan dört farkli kompozit rezinin su emilimi ve sudaki çözünürlüklerinin karşilaştirilmasidir. Gereç ve Yöntemler: çalişmada her kompozit grubundan 10 tane olmak üzere 2 mm derinliğinde 8 mm çapinda toplam 40 adet silindirik disk hazirlandi ve işikla polimerize edildi. örnekler sabit ağirliklarina ulaşincaya kadar 24 h desikator icinde bekletildi. Daha sonra tüm örneklerin ağirliklari hassas terazi ile ölçüldü. 1, 7 ve 30. günlerin sonunda su emilimini ve çözünürlük sonuçlarini hesaplamak için hassas terazi ile tartimlar yapildi. Elde edilen veriler ANOVA tek yönlü varyans analizi ve Friedman testleri kullanilarak değerlendirildi. Bulgular: Yapilan istatistikler sonucunda kompozit rezinlerin su emiliminde 7. ve 30. günlerde, sudaki çözünürlüklerinde ise sadece 30. günde anlamli farkliliklarin olduğu saptanmiştir (p < 0,05). Sonuç: Kompozit rezinlerin 30 gün sonundaki su emilimi ve suda çözünürlüğü istatistiksel açidan değerlendirildiğinde Ceram X One materyalinin en düşük değerleri gösterdiği görülmüştür. Bu da restoratif materyalin yapisi ile ilişkilidir. Sonuç olarak restoratif materyallerin su emilimi ve suda çözünürlük faktörleri, mekanik, fiziksel ve biyolojik olarak olumsuz etkiler oluşturduğundan gözönünde bulundurulmasi gereken önemli konulardandir. © 2018 Cumhuriyet University Faculty of Dentistry.
  • [ X ]
    Öğe
    An evaluation of the efficiency of different irrigation systems on the smear layer
    (University of Dicle, 2014) Şahbaz C.; Adigüzel Ö.
    The aim of this study is to investigate the effect of three different irrigation technics on smear layer occured during root canal preparation of maxillary incisors that has endodontic treatment indications. Freshly extracted 60 maxillary incisors because of periodontal problems were used in this study. In preferring teeth such criterias as; nearly similar root lengths, no inclination of roorts and the same pulpal width were used. Debridement on roots were removed with a cretuar after extraction. Root surfaces were cleaned with brushes. Teeth were protected at room temperature in distilled water until usage day in study. Teeth were sectioned vertically to long axis 2 mm over enamel cement junction (cervical line). Teeth were randomly divided into three groups of each 20. Coronal access of teeth were extended by the help of Gates Glidden bur No V. Root canal preparation was started by using endodontic device (Vdw. Gold, Munich, Germany) and Protaper (Dentsply, Maillefer, Ballaigues, Switzerland) rotary instruments. Firstly root canal lengths were measured by K type root canal insturment (Dentsply, Maillefer, Ballaigues, Switzerland) and working lengths were determined as 1 mm shorter than foramen apicale. Extending operation was first started with SX (Dentsply, Maillefer, Ballaigues, Switzerland) among rotary instruments and then continued respectively as S1,S2,F1,F2 and resulted with F3. Different irrigation technics were used for each group. In group 1 irrigation was done with ultrasonic device (Nsk Various 970, Japan). Irrigation was done at a regulated frequency for endodontic operation and by using specially prepared E4 and E11 instruments. First tank was filled with 5.25% NaOCl and second tank was filled with 17% EDTA as irrigation solution. When between each instrument changes 5.25% NaOCl was used,17% EDTA was used for final irrigation. In second group irrigation was done with classical method. After using SX instrument, irrigation was done by 27-gauge plastic syringe (Hayat Medical Instruments, Istanbul ,Turkey) with 5.25% NaOCl. Irrigation was repeated after every instrument and finally was done with 17% EDTA. In third group irrigation was done by Endo-Vac (Discus Dental, Culver City, California) device. After every rotary instrument irrigation was done by MDT and macro canula with 5.25% NaOCl. And final irrigation was done by micro canula with 17% EDTA. After irrigations root canals were dried with paper points (Meta Dental Co, Ltd, Korea). After preparation teeth were bucco-lingually and longitudinally sectioned by opening thin tunnels (hollows) burs by aerator device. Coronal, middle and apical parts of roots were analyzed under SEM (EVO 40-LEO, Germany). Obtained data was assessed with one way Kruskal-Wallis variance analysis (p<0.05). Among Group 1 (Ultrasonic), Group 2 (Classic) and Group 3 (Endo-Vac) in terms of capacity of cleaning root surfaces statistically a significance was determined. That means presence of smear layer in three groups and in terms of whether dentine tubules are open and ¬ on coronal, middle and apical regions af root surface variability was determined. When capacity of cleaning of root canal surfaces of teeth were investigated; in coronal region irrigation by ultrasonic system, in middle region irrigation by classical syringe method and in apical region irrigation by Endo-Vac device determined successful.