Amaç: Bu çalışmanın amacı alt mandibular dişlerde, Reciproc Blue tek eğe sisteminin sodyum hipoklorit (NaOCl) ve etilen daimin tetra asetik asit (EDTA) jel varlığında 1 veya 3 kez kullanımları sonrası döngüsel yorgunluk direncini değerlendirmektir. Gereç ve Yöntemler: Çalışmada, 120 alt mandibular molar diş kullanıldı ve dişler rastgele NaOCl veya EDTA jel solüsyonları ve eğelerin kullanım sayılarına (1-3 kez) göre gruplara ayrıldı. Resiproc Blue 25/08 eğeler ile kök kanal şekillendirmesi yapıldı ve eğelerin 3 defa kullanıldığı grupta 1. ve 2. kullanımdan sonra otoklav sterilizasyonu yapıldı. Eğeler çekilmiş dişlerde kullanıldıktan sonra yapay kanal test düzeneğinde döngüsel yorgunluk direnci testine tabi tutuldu. Kırılma zamanı, kırılana kadar yaptığı döngü sayıları ve oluşan kırık parça uzunlukları istatistiksel olarak tek yönlü varyans analizi, Kruskal-Wallis ve Tukey testi ile değerlendirildi. Bulgular: Döngü sayıları karşılaştırıldığında, kontrol grubu ile NaOCl-1 grubu arasında fark bulunmazken kontrol grubu ile NaOCl-3, EDTA-1 ve EDTA-3 grupları arasında istatistiksel olarak anlamlı bir fark bulunmuştur. Kullanılan solüsyonlar karşılaştırıldığında iki solüsyonun eğelerin döngüsel yorgunluğunu etkilemesi açısından anlamlı fark bulunmamıştır (p>0,05). NaOCl-1 ile NaOCl-3 ve EDTA1 ile EDTA-3 grupları arasında ikili karşılaştırmaları değerlendirildiğinde istatistiksel olarak anlamlı bir fark bulunmamıştır. Sonuç: Kök kanallarında Resiproc eğelerle enstrümantasyon yaparken NaOCl veya EDTA jel kullanılmasının veya eğelerin bir veya üç molar dişte kullanılmasının döngüsel yorgunluk testinde istatistiksel olarak farklılık göstermediği gözlemlenmiştir.
Anahtar Kelimeler: Kök kanal preparasyonu; kök kanal irrigasyonu
Objective: The aim of this study was to compare the cyclic fatigue resistance of Reciproc Blue files after used in 1 or 3 extracted molar teeth while irrigation with sodium hypochlorite (NaOCl) or ethylenediaminetetraacetic acid (EDTA) gel. Material and Methods: In this study, 120 mandibular molar teeth were randomly divided depending on the number of uses of the files (1-3 times) and irrigation solution (NaOCl or EDTA gel). Root canal shaping was performed with Resiproc 25/08, and autoclave sterilization was performed after the 1st and 2nd use in the group where the files were used 3 times. After use on extracted teeth, Resiproc Blue files were subjected to cyclic fatigue resistance testing in an artificial canal test rig. Breakage time, number of cycles until breakage and length of broken pieces were evaluated statistically. Data were evaluated with one-way analysis of variance, Kruskal-Wallis test and Tukey test. Results: While there was no statistically significant difference between the control and NaOCl-1 groups in terms of number of cycles to fracture and break-up times (p>0.05), a significant difference was found between the control group and NaOCl-3, EDTA-1 and EDTA-3 groups (p<0.05). When the solutions used were compared, no significant difference was found in terms of whether the two solutions affected the cyclic fatigue of the files (p>0.05). When pairwise comparisons were evaluated between NaOCl-1 and NaOCl-3 and EDTA-1 and EDTA-3 groups, no statistically significant difference was found. Conclusion: It has been observed that the use of NaOCl or EDTA gel during instrumentation in root canals or the use of files on one or three molar teeth did not influence the cyclic fatigue residence of the Resiproc files.
Keywords: Root canal preparation; root canal irrigation
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