Habibe ÖZTÜRK, Mehmet SONUGELEN, CELAL ARTUNÇ, Hüseyin TEZEL, Atilla KESERCİOĞLU, MEHMET ALİ AYDIN İŞİSAĞ

Farklı Yapıştırma Simanlarının Termomekanik Yaşlandırma Sonrası Performanslarının Karşılaştırılması

Amaç: Termomekanik yaşlandırmanın farklı adeziv reziv simanların mikroçekme bağ dayanımı ve nanosızıntı miktarları üzerine etkisini incelemektir. Yöntem: Otuz adet çekilmiş üçüncü molar diş düz bir dentin yüzeyi elde etmek için su soğutması altında kesildi. Daha sonra kompozit örnekler kesilen dişlere farklı adeziv rezin simanlarla yapıştırıldı. Elde edilen örnekler kullanılan yapıştırma simanlarına göre beş gruba ayrıldı; 1-Variolink II-konvansiyonel "asitle ve yıka" rezin siman, 2-Multilink-kendinden asitli rezin siman, 3-Panavia F2.0-kendinden asitli rezin siman, 4RelyX U200-kendinden adezivli rezin siman, 5-SuperBond C&B-konvansiyonel "asitle ve yıka" rezin siman. Her yapıştırma simanı grubu kendi içinde kontrol grubu ve çalışma (termomekanik yaşlandırma) alt grubuna ayrıldı. Kontrol grubundaki örneklere herhangi bir yaşlandırma işlemi uygulanmadı. Çalışma grubundaki örneklere 5-55ºC'de 10.000 defa termal ve 50 N'da 50.000 defa mekanik işlemi uygulandı. Örnekler %50'lik amonyaklı gümüş nitrat solüsyonunda 24 saat bekletildikten sonra bağlanma direnci testi uygulandı ve FEI-SEM/EDX ile incelendi. Bulgular: Mikroçekme bağ dayanımı ve nanosızıntının yaşlandırma işleminden etkilenmediği görüldü (p>=0,05), fakat rezin yapıştırma simanları arasında anlamlı bir fark bulundu (p>=0,05). Sonuç: yaşlandırmadan etkilenmediği tespit edildi ve adeziv rezin simanın restorasyonun uzun ömürlü olmasında etkili olduğu sonucuna varıldı

A Comparison Of The Performance Of Different Resin Luting Cements After Thermomechanical Aging

Objectives: To investigate the effects of the thermomechanical aging on microtensile bond strength and nanoleakage of different adhesive resin luting cements. Methods: Thirty human third molar teeth were cut under water cooling to obtain flat dentine surface. Then composite specimens were adhered onto prepared teeth with different adhesive resin cements. Samples were divided into five groups according to the luting cements used; 1-Variolink II-convantional etch-and-rinse resin cement, 2-Multilink-selfetch resin cement, 3-Panavia F2.0-self-etch resin cement, 4-RelyX U200-self-adhesive resin cement, 5-SuperBond C&B-conventional etc-and-rinse resin cement. Each resin cement group was separated into two subgroups as control and thermomechanical aging group. No thermomechanical aging was applied to the samples in the control group. Samples in thermomechanical aging group were subjected to 10.000 thermocycles at 5-55ºC and 50.000 loadingcycles using a loading force of 50 N. After samples were immersed in a solution consisting of 50% ammoniac silver nitrate for 24h, bond strength test was performed and samples were observed under FEI-SEM/EDX. Results: It was seen that microtensile bond strength and nanoleakage were not significantly affected by aging (p≥0,05), but a significant difference was found among the luting resin cements (p˂0,05). Conclusion: It was determined that the performance of resin luting cements used in this study was not affected by thermomechanical aging and concluded that the type of adhesive resin cement is effective on longevity of the restoration

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