Amaç: Simüle edilmiş rezin kanallar üzerinde yapılan bu deneysel çalışmada, TruNatomy (TN) ve Reciproc Blue (RB) döner alet sistemlerinin şekillendirme etkinlikleri kapsamında gözlenen merkezde kalma ve kanal transportasyonu oranları incelendi. Gereç ve Yöntemler: Otuz iki adet J-şekilli rezin blok (Endo Training Bloc; Dentsply, Maillefer, Tulsa, ABD) rastgele iki eşit gruba (Grup 1: TN, n=16; Grup 2: RB, n=16) ayrıldı. Preparasyon öncesi kanallar siyah mürekkeple boyanarak stereo mikroskopla görüntüleri kaydedildi. İlk grupta Reciproc Blue R25; ikinci grup TruNatomy Glider'ın ardından TruNatomy Prime kullanılarak kanal preparasyonu tamamlandı. Şekillendirmenin ardından kanallar kırmızı mürekkeple boyanarak stereo mikroskopla ikinci görüntüler alındı. Şekillendirme öncesi ve sonrası görüntüler çakıştırılarak değişimler kaydedildi. Kruskal-Wallis varyans analiziyle veriler değerlendirildi. İstatistiksel anlamlılık sınırı <0,05 olarak kabul edildi. Bulgular: Apikalde bölgede TN merkezde kalma konusunda daha iyi sonuçlar gösterdi (p<0,01). Orta üçlü ve koronalde ise RB ve TN grupları arasında merkezde kalma açısından anlamlı bir fark bulunamadı. Toplam kanal uzunluğu değerlendirildiğinde merkezde kalma özelliğinde TN grubu daha iyi sonuçlar elde etti (p<0,01). Apikal ve orta üçlüde RB grubunun kanal transportasyonu oluşturmaya daha meyilli olduğu görüldü (p<0,01). Toplam kanal uzunluğu değerlendirildiğinde RB grubunda daha yüksek kanal transportasyon oranları tespit edildi (p<0,01). Sonuç: TN sisteminde daha az kanal transportasyonu ve merkezden sapma görüldü. TN sisteminin daha düşük koniklik açısına sahip olması ve farklı tasarım özelliklerinin bu sonucu açıklayabileceği düşünüldü.
Anahtar Kelimeler: Kök kanal tedavisi; endodonti; dental araçlar
Objective: This experimental research studies and compares the shaping ability (centering ability, canal transportation) of Reciproc Blue (RB) and TruNatomy (TN) endodontic file systems in the preparation of moderataly curved canals in simulated resin block. Material and Methods: 32 J-shaped resin blocks were randomly divided into 2 equal groups (Group 1: TN n=16; Group 2: RB, n=16). Specimens were dyed with black ink and photographed under stereomicroscope before preparation. Group 1 was treated with R25. Group 2 was treated with TruNatomy Glider and TruNatomy Prime. After instrumentation, specimens were dyed with red ink and photographed under stereomicroscope again. Before and after photograps were matched and measured. Data were evaluated by using Kruskal Wallis analysis of variance. The significance level was established at 0.5%. Results: In apical region, TN had better results about centering ability (p<0,01). In middle and coronal regions, no significant differences were found between TN and RB. When total canal lenght were examined, TN had better results about centering ability (p<0,01). In apical and middle regions, RB had more tendencey about canal transportation(p<0,01). When total canal lenght were examined, higher canal transportation rates were recorded in RB group (p<0,01). Conclusion: TN system had better results about centering ability and canal transportation. Different design characteristics and lower taper rate of TN might have explained this results.
Keywords: Root canal therapy; endodontics; dental instruments
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