Ozon uygulamasının devital ağartma yapılan dentinde rezin simanın shear bağlanma dayanımına etkisi

Yıl 2014, Cilt: 1 Sayı: 2, 59 - 65, 01.08.2014

Betül Özçopur Özer Alkan Öznur Eraslan Eylem Ayhan Alkan Gürcan Eskitaşçıoğlu

https://doi.org/10.15311/1441.272635

Cited By: 1

Öz

Amaç: Ozon uygulanan ve uygulanmayan devital
ağartma yapılmış dentine iki rezin simanın
bağlanma dayanımının incelenmesi
Gereç ve Yöntemler: : Seksen yeni çekilmiş
sağlam insan maksiller kesici kuronları sekiz gruba
ayrıldı (n=10): (G1, G2). Ağartmayı takiben ozon
uygulanmayan (10% carbamide peroxide,
Opalescence Boost %38 Hydrogen peroxide) veya
uygulanan gruplar (G3, G4) (40%, 50 second, CR
probe, Biozonix; High-Frequency Ozone Generator,
Germany), ozonun ağartma yapılmadan
uygulandığı gruplar (G5, G6) ve herhangi bir işlem
uygulanmayan kontrol grupları (G7, G8). Kuronlar
akrilik rezin içine dentin yüzeyleri açıkta kalacak
şekilde yerleştirildi. Örneklerde iki rezin simandan
biri kullanıldı: Secure Cement (Sun Medical) (G1,
G3, G5, G7); Clearfil Esthetic Cement (Kuraray)
(G2, G4, G6, G8). 3 x 3 boyutunda rezin siman
oluturulan gruplar setleşme süresinden (37ºC,
100% nemli, 24 saat) sonra shear bağlanma
dayanımı ile test edildi ( 0.5 mm/minute). Veriler
MPa olarak hesaplandı ve Kruskal-Wallis testi ile
analizler yapıldı (P < 0.05).
Bulgular: Ağartma işleminin ozon uygulaması ile
kombine kullanımı hem Secure siman (G3) hem de
Clearfil Esthetic simanın (G4) bağlanma dayanımını
artırdı (p > 0.05). Ozon uygulanan Secure siman
örnekleri (G5), G1, G3, ve G7 gruplarından anlamlı
derecede daha düşük bağlanma dayanımı gösterdi
(P < 0.05). Clearfil Esthetic siman grubu (G4)
kontrol grubundan (G8) anlamlı derecede daha
yüksek bağlanma dayanımı gösterdi.
Sonuç: Bonding işlemleri öncesinde ozon
uygulaması ağartma sonrası geride kalan peroksitin
etkisini azaltabilir. Devital ağartma sonrası ozon
uygulaması rezin simanın dentin yüzeyine
bağlantısını artırabilir.

Anahtar Kelimeler

Nonvital bleached dentin, ozone, rezin siman, shear bond strength

Effect of ozone application on the shear bond strength of resin cements to nonvital bleached dentin

Öz

Background: The aim of this study was to evaluate the bond strengths of two resin based cements bonded to ozon-treated or non-treated nonvital bleached dentin.Methods: Eighty freshly extracted sound human maxillary incisor crowns were assigned to eight groups (n = 10): (G1, G2) bleached (10% carbamide peroxide, Opalescence Boost %38 Hydrogen peroxide) without or (G3,G4) with application of gaseous ozone (40%, 50 second, CR probe, Biozonix; High-Frequency Ozone Generator, Germany), (G5, G6) ozon treated without bleaching and (G7, G8) untreated control groups. The crowns were embedded in acrylic resin and dentin surfaces were exposed. Specimens were bonded with one of the two resin cements: Secure Cement (Sun Medical) (G1, G3, G5, G7); Clearfil Esthetic Cement (Kuraray) (G2, G4, G6, G8). 3 x 3 build-ups were created with the Resin cements and allowed to set (37ºC, 100% humid, 24 hrs) and then tested to failure for shear bond strength ( 0.5 mm/minute). The data was calculated as MPa and analyzed using Kruskal-Wallis test (P < 0.05).Results: Combination of ozone treatment and bleaching resulted in increased bond strength on both Secure cement (G3) and Clearfil Esthetic cement (G4) specimens (p > 0.05). Secure cement specimens treated with ozone (G5) demonstrated significantly lower shear bond strengths than G1, G3, and G7 (P < 0.05). Significant increase in shear bond strength was detected in Clearfil Esthetic cement group (G4) when compared to untreated control group (G8).Conclusion: Pretreatment with ozone prior to bonding procedure may decrease the effect of residual peroxide-induced reduction in resin bond strength. Thus, ozone application on nonvital bleached dentin surfaces can improve resin cement bonding to dentin surfaces.

Anahtar Kelimeler

Nonvital bleached dentin, rezin siman, ozone, shear bond strength

Kaynakça

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