Comparison of Shaping Ability of a Newly Developed Pediatric Rotary File and the Conventional Rotary Instruments in Simulated Curved Canals: 2-Dimensional Computerized Study

ABSTRACT Objective: Deciduous teeth require special instruments for mechanical preparations due to the anatomical differences in the root canal morphology. This study aimed to assess the preparation features of a newly developed pediatric rotary file system in simulated curved canals versus con- ventional rotary systems. Materials and Methods: Twenty-eight simulated canals in resin blocks were divided into groups for Endoart Pedo Smart Gold and Endoart Smart Gold instruments. Preparation was held on the crown-down technique. Pre-/post-operative digital images were superimposed, and aberrations were detected. The removed resin amount was measured at 10 points, and the mean values of outer and inner width differences were recorded. The centering ratio was also detected for each sample. Results: The analyses from the apex revealed that the groups showed similar results in inner measurements except for the points of 0 mm (P < .001), 3 mm (P < .001), and 9 mm (P = .036). The statistical differences were also detected in the outer wall at the apical third, curved area, and middle third of the root length (P < .05). Endoart Pedo Smart Gold group showed statistically better-centering ability at the coronal entrance of the simulated root canals. Conclusion: The root canal preparation with pediatric rotary systems revealed better results regarding centering ability and caused less dentin removal. Keywords: Root canal treatment, root canal preparation, pediatric rotary files ÖZ Amaç: Süt dişleri, kök kanal morfolojisindeki anatomik farklılıklar nedeniyle mekanik hazırlıklar için özel aletler gerektirir. Bu çalışma, simüle edilmiş kavisli kanallarda yeni geliştirilen pediatrik döner eğe sisteminin geleneksel döner sistemlere göre preparasyonlarını değerlendirmeyi amaçlamıştır. Gereç ve Yöntem: Endoart Pedo Smart Gold ve Endoart Smart Gold aletleri için reçine blokla- rda yirmi sekiz simüle kanal gruplara ayrıldı. Crown-down tekniği ile preparasyonlar yapıldı. İşlem öncesi/sonrası dijital görüntüler üst üste bindirildi ve sapmalar tespit edildi. Çıkarılan reçine miktarı 10 noktada ölçülerek dış ve iç genişlik farklılıklarının ortalama değerleri kaydedildi. Her numune için merkezleme oranı da tespit edildi. Bulgular: Analizler, grupların apeksten itibaren 0 mm (P < ,001), 3 mm (P < ,001) ve 9 mm (P = ,036) noktaları dışında iç ölçümlerde benzer sonuçlar gösterdiğini ortaya koydu. İstatistiksel farklılıklar, kök uzunluğunun apikal 1/3'ünde, kavisli alanda ve orta 1/3'ünde dış duvarda tespit edildi (P < ,05). Endoart Pedo Smart Gold grubu, simüle edilmiş kök kanallarının koronal girişinde istatistiksel olarak daha iyi merkezleme yeteneği gösterdi. Sonuç: Pediatrik döner sistemlerle kök kanal preparasyonu, merkezleme kabiliyeti açısından daha iyi sonuçlar ortaya koydu ve daha az dentin çıkarılmasına neden oldu. Anahtar kelimeler: kök kanal tedavisi, kök kanal preparasyonu, pediatrik döner eğeler

Keywords:

Root canal treatment root canal preparation, pediatric rotary files,

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