Sevinç Askerbeyli ÖRS, Hacer AKSEL, Selen Küçükkaya EREN, NACİYE DİLARA ZEYBEK

Tannik asitle irrigasyonun kök kanal dentininin mikrosertliğine ve epoksi rezin esaslı patın bağlanma dayanımına etkisi

Amaç: Tannik asit (TA) içeren final irrigasyon protokollerinin dentin miksrosertliğine ve epoksi rezin içerikli patın kök kanal dentinine push-out bağlanma dayanımına etksinin incelenmesiGereç ve Yöntemler: 50 adet yarım kök mikrosertlik ölçümü için akrilik rezine gömüldü. İşlem öncesi miksrosertlik değerleri elde edildikten sonra örnekler kullanılacak olan final irrigasyon protokolüne göre rastgele 5 gruba dağıtıldı (n=10): distile su (kontrol), % 10 TA 2 dk, %10 TA 5dk, % 20 TA 2 dk, ve %20 TA 5 dk. Dentin yüzeyleri irrigasyon solüsyonları ile muamele edildikten sonra başlangıç ölçümlerinin yapıldığı noktalara yakın olacak şekilde mikrosertlik değerleri tekrar ölçülüp kaydedildi. Push-out bağlanma dayanımı testi için 75 adet tek köklü mandibular premolar dişin kanalı genişletildi ve final irrigasyon protokolü yukarıda bahsedildiği şekilde uygulandı (n = 15). Örneklerin kanalları tek kon yöntemi kullanılarak uyumlu gütaperka konlar ve AH Plus- epoksi rezin içerikli patla doldurulduktan sonra köklerin orta üçlü bölümünden 1-mm kalınlığında kesitler elde edildi. Push-out bağlanma testi uygulandı. Veriler tek yönlü varyans analizi (ANOVA) ve Tukey HSD testleri kullanılarak değerlendirildi (p=0.05).Bulgular: TA uygulanmış gruplarda mikrosertlik değerleri kontrol grubuna gore anlamlı artış gösterirken (p<0.05), TA uygulanmış grupların mikrosertlik değerleri kendi aralarında anlamlı bir fark göstermedi (p>0.05). Push-out bağlanma dayanımı testi sonucunda % 10 TA 2 dak. grubu ile kontrol grubu arasında anlamlı fark bulunamadı (p>0.05). Diğer TA grupları kontrol grubuna gore daha yüksek bağlanma dayanımı değerleri gösterirken (p<0.05), aralarında anlamlı fark bulunamadı (p>0.05). Sonuç: TA ile final irrigasyon yapılması dentin mikrosertliğini ve epoksi rezin içerikli kanal dolgu patının kök kanal dentinine bağlanma dayanımını arttırdı. TA’nın bağlanma dayanımı üzerindeki etkisi zaman ve konsantrasyon bağımlıdır.

Anahtar Kelimeler:

dentin, epoksi rezin esaslı pat, bağlanma dayanımı, mikrosertlik

Effect of tannic acid irrigation on microhardness of root canal dentin and bond strength of epoxy resin based sealer

Background:To investigate the effects of final irrigation protocols with tannic acid (TA) on dentin microhardness and push-out bond strength of an epoxy resin based sealer to root canal dentin.Methods: The 50 root halves were embedded in an acrylic resin for the microhardness measurement. After the initial baseline microhardness measurement, the root halves were randomly divided into 5 groups according to the final irrigation protocol used (n=10): distilled water (control), 10% TA for 2 min, 10% TA for 5 min, 20% TA for 2 min, and 20% TA for 5 min. After surface treatment, dentin microhardness values were recorded at close proximity to the initial indentation areas. For push-out bond strength test the root canals of 75 single-rooted mandibular premolars were instrumented and the final irrigation protocols were applied as described above (n = 15). Following root canal obturation with single cone technique using matched-taper gutta percha cones and an AH Plus- epoxy resin based root canal sealer, 1 mm-thick slices were obtained from the middle third of the root canals. Push-out bond strength test was applied. The data were analyzed using One way ANOVA and Tukey HSD tests (p=0.05).Results:In TA-treated groups, there was a significant increase in the microhardness values compared with the control group (p<0.05). Regarding the push-out bond strength test, there was no significant difference between the bond strength values of 10% TA for 2 min and the control group (p>0.05). The remaining groups presented higher bond strength values than the control group (p<0.05).Conclusions: TA increased dentin microhardness and the bond strength of the epoxy resin based sealer to root canal dentin. The effect on the bond strength was time and concentration dependent. Keywords: bond strength, dentin, microhardness, epoxy resin based sealer, tannic acid

Keywords:

bond strength, dentin, microhardness, epoxy resin based sealer,

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