Sodyum askorbat irrigasyonunun fiber postlarýn baðlanma kuvveti üzerindeki kýsa süreli etkisi

Amaç: Bu çalýþmanýn amacý, kanal dolgusunun hemen ardýndan hazýrlanan post boþluklarýnýn irrigasyonundan sonra, fiber postlarýn kök kanal dentinine push-out baðlanma kuvvetinin deðerlendirilmesidir. Gereç ve Yöntem: 30 adet tek kanallý üst kesici ve kanin diþleri 3 gruba ayrýldý (n: 10). Kanal tedavileri tamamlandýktan ve post boþluklarý hazýrlandýktan sonra diþler farklý solüsyonlarla yýkandý. 1.gruptaki diþler distile suyla yýkandý ve kontrol grubu olarak belirlendi. 2.gruptaki diþler %5,25 NaOCl, %17 EDTA ve distile suyla yýkandý. 3.gruptaki diþler % 5,25NaOCl, %17 EDTA ve distile suyla yýkandý. Ardýndan, bu gruptaki diþlere 10 dk boyunca %10 sodyum askorbat solüsyonu uygulandý. RelyX fiber postlar RelyX Unicem self-adeziv rezin simanla yapýþtýrýldý. Köklerin kuronal, orta ve apikal olmak kaydýyla her bölümünden 3 adet kesit alýndý ve toplamda 90 adet kesit elde edildi. Pushout baðlanma dayanýmý testi ve kýrýk tiplerini belirlemek amacýyla SEM analizi yapýldý. Ýstatistiksel analiz için one-way ANOVA ve Tukey HDS testleri kullanýldý (p<0.05). Bulgular: Ortalama baðlanma dayanýmý deðerleri kontrol grubunda 8,64±3,73 MPa, 2.grupta 8,37±2,88 MPa ve 3.grupta 9,94±2,94 MPa olarak bulundu. Kök bölgelerine ve kullanýlan irrigasyon solüsyonlarýna göre baðlanma dayanýmý deðerleri arasýnda anlamlý bir farklýlýk gözlenmedi (p>0.05). Sonuç: Post boþluðu hazýrlandýktan sonra uygulanan sodyum askorbat solüsyonu, NaOCl ve EDTA’ya kýyasla fiber postlarýn dentine baðlanma kuvvetini arttýrmamaktadýr.

The short-term effect of sodium ascorbate irrigation on push-out bond strengths of fiber posts

Aim: The aim of this study was to evaluate the pushout bond strength of fiber posts to root canal dentin after irrigation of post spaces, prepared shortly after root canal filling. Materials and Methods: Thirty roots of maxillary central incisors and canines were divided into 3 groups (n=10) and irrigated with different solutions after post space preparations. In the first group that served as the control, only distilled water was used for irrigation. In the second group, 5.25% NaOCl, 17% EDTA and distilled water were used subsequently for irrigation. In the third group, 5.25% NaOCl, 17% EDTA and distilled water were used. Then, 10% sodium ascorbate was applied to root canal for 10 minutes. RelyX Fiber Posts were cemented with RelyX Unicem selfadhesive resin cement. Three slices from different root regions (coronal, middle, apical) were sectioned, and totally 90 slices were collected. The push-out test was conducted and the SEM analysis was performed to determine the failure modes. One-way ANOVA and Tukey HDS tests were used to analyze the data (p<0.05). Results: The mean bond strength was found as 8.64±3.73 MPa in the control group, 8.37±2.88 MPa in the second group and 9.94±2.94 MPa in the third group. There were no statistically significant differences between the bond strength values of the groups related to irrigation procedures and root regions (p>0.05). Conclusions: Sodium ascorbate application after post space preparation did not cause higher bond strength of fiber posts to dentin, compared to conventional NaOCl and EDTA irrigation.