Eğri kök kanallarının tedavi tekrarında farklı Ni-Ti döner alet yöntemlerinin transportasyon ve merkezde kalma etkinliklerinin karşılaştırmalı olarak incelenmesi

Background: The aim of the present study was to evaluate canal transportation and centering ability ProTaper, HeroShaper two Ni-Ti rotary systems developed for retreatment (ProTaperRetreatment R-Endo). Materials Methods: One hundred twenty mesial canals mandibular molars with curvatures between 30-40 degrees radii 4-9 mm were embedded in a modified muffle system. teeth randomly divided into 8 groups (n=15). roots sectioned horizontally at 3, 6 9 from working length. Cross-sections digitally photographed under standardized conditions. Half root prepared ProTaper rest HeroShaper. Postoperative photographs obtained. Root obturated respective gutta-percha cones AHPlus sealer. Following four systems, assessed directions, ratio. Results: Initial shaping resulted more significant than (p<0.05). After retreatment, R-Endo yielded negative values apical mid-sections. In coronal sections ProTaperRetreatment, mid-sections revealed acceptable re-shaping results. HeroShaper, after relatively efficient mid-sections; sections. Conclusion: All caused certain amount eccentricity. Protaper, ProtaperRetreatment showed similar performance regard initial procedure. However, insufficient cleaning