Influence of Dentinal Erosion on Shear Bond Strength of Composite Restorations with Different Bonding Systems Dental Erozyonun Farklı Bağlayıcı Ajan Kullanılarak Yapılan Kompozit Restorasyonların Kesme Bağlanma Kuvvetine Etkisi

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ÖZET Aim: The aim of the study is to examine the effect of dentinal erosion on shear bond strength of composite restorations. Materials and Methods: A half of 80 dentin pairs were subjected to erosion and toothbrush abrasion (eroded samples) whereas the other half was subjected to toothbrush abrasion (non-eroded samples) during six days. The restorations were bonded with (1) Optibond FL, (2) Excite, (3) One Coat SE Bond and (4) G-Bond. The samples were stored at 370C for 24 h and thermally cycled 1000 times. The shear bond strength was measured and fractured areas were analyzed by SEm. Results: Without pre-test failures (pTF), the mean bond strength for the eroded samples was 18.20±10.31 mpa and for the non-eroded samples 21.12±11.14 mpa. In the eroded samples, groups 1, 3 showed higher shear bond strengths than groups 2, 4, but without statistically significant differences (p> 0.05). In the non-eroded samples, group 1 showed higher bond strength than groups 3, 4 (p<0.05). A comparison between the eroded and non-eroded groups showed statistically significant increase of bond strength in the non-eroded samples of groups 1and 2, but a decrease in the non-eroded samples of group 3 Amaç: Bu çalışmanın amacı dental erozyonun kompozit rezin restorasyonların kesme bağlanma kuvvetine olan etkisini değerlendirmektir. Gereç ve yöntem: Altı gün boyunca 80 çift dentin yüzeyinin yarısı erozyon ve diş fırçası abrazyonuna (erozyonlu örnekler) diğer yarısı ise sadece diş fırçası abrazyonuna (erozyonsuz örnekler) maruz bırakılmıştır. Daha sonra yüzeyler üzerine (1) Foptibond FL, (2) Excite, (3) One Coat SE Bond (4) G-Bond bağlayıcı ajanlar kullanılarak kompozit restorasyonlar yapılmıştır. Örnekler 370C’de 24 saat saklandıktan sonra 1000 defa termal siklus işlemine tabi tutulmuşlardır. Kesme bağlanma kuvveti ölçülen örneklerin kırılma yüzeyleri elektron mikroskobuyla incelenmiştir. Bulgular: Test öncesi başarısız örnekler dahil edilmeden, erozyonlu örneklerin ortalama bağlanma kuvveti 18.20± 10.31 mpa, erozyonsuz örneklerinki ise 21.12± 11.14 mpa olarak bulunmuştur. Erozyonlu örneklerde, grup 1,3 grup 2,4’e oranla daha yüksek kesme bağlanma kuvveti göstermiş ancak istatistiksel farklılık bulunmamıştır (p> 0.05). Erozyonsuz örneklerde, grup 1; grup 3,4 ten yüksek bağlanma kuvveti göstermiştir (p<0.05). Erozyonlu ve erozyonsuz grupların karşılaştırılmasında ise, grup 1 ve 2’nin erozyonsuz örneklerinin bağlanma kuvvetinde artma, grup Hacettepe Diş Hekimliği Fakültesi Dergisi Cilt: 32, Sayı: 3, Sayfa: 34-44, 2008 Influence of Dentinal Erosion on Shear Bond Strength of Composite Restorations with Different Bonding Systems Dental Erozyonun Farklı Bağlayıcı Ajan Kullanılarak Yapılan Kompozit Restorasyonların Kesme Bağlanma Kuvvetine Etkisi *Melek D. TurguT DDS, PhD, **Brigitte ZiMMerli DDS, ***Adrian luSSi Chem. DDS, PD *Research Fellow, Department of Preventive, Restorative and Pediatric Dentistry, School of Dental Medicine, University of Bern ** Assistant Professor, Department of Preventive, Restorative and Pediatric Dentistry, School of Dental Medicine, University of Bern *** Professor and Head of the Department of Preventive, Restorative and Pediatric Dentistry, School of Dental Medicine, University of Bern ARAŞTIRMA (Research)

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تاریخ انتشار 2009