Objective: The purpose of this study was to evaluate the effect of using single-file with different tapered coronal flaring files on dentinal crack. Material and Methods: Human extracted mandibular premolars (n=128) were selected and divided into four groups (n=32) based on the coronal flaring instruments; Group 1, One Flare; Group 2, Endoflare; Group 3, Gates Glidden Drills; Group 4, Control Group. Specimens divided into four subgroups based on the single file system (n=8): Subgroup A, HyFlex EDM: Subgroup B, Reciproc Blue: Subgroup C, One Shape: Subgroup D, WaveOne Gold. All roots were then sectioned at 3, 6, and 9 mm from the apex. The sections were inspected under a stereo-microscope at 2.5X and 5X to determine the presence of microcracks. The data were analyzed using the chi-square test (p=0.05). Results: There was no statistically significant difference between the distributions of dentinal cracks caused by the use of single-file systems with different coronal flaring files (p>0.05). There was no statistically significant difference between the distributions of dentinal cracks according to single file systems (p>0.05). There was also no statistically significant difference between the distributions of dentinal cracks according to coronal flaring files (p>0.05). Conclusion: The use of coronal flaring instruments combinations with single file systems reduced the observation of dentin cracks. One Flare files caused less dentinal cracks than the other instruments test.
Keywords: Coronal flaring; microcracks; single-file systems; One Flare; WaveOne Gold
Amaç: Bu çalışmanın amacı, farklı taperlı koronal genişletme enstrümanlarının rotasyonel ve resiprokal tek eğe sistemleri ile kullanımının dentin çatlağı üzerine etkisini değerlendirmektir. Gereç ve Yöntemler: Çalışmada 128 adet tek köklü mandibular premolar diş koronal genişletme için kullanılacak enstrümanlara göre 4 ana gruba (n=32) ayrılmıştır: Grup 1, One Flare; Grup 2, Endoflare; Grup 3, Gates Glidden drills; Grup 4, Kontrol Grup. Daha sonra örnekler kök kanal şekillendirilmesinde kullanılacak tek eğe sistemlerine göre 4 alt gruba (n=8) ayrılmıştır: Alt Grup A, HyFlex EDM; Alt Grup B, Reciproc Blue; Alt Grup C, One Shape; Alt Grup D, WaveOne Gold. Tüm örneklerden kök ucundan 3, 6 ve 9 mm uzaklıklarda kesitler alınmıştır. Kesitler, mikro çatlakların varlığını belirlemek için bir stereo-mikroskop altında 2,5X ve 5X'de incelenmiştir. Veriler ki-kare testi kullanılarak analiz edilmiştir (p=0,05). Bulgular: Tek eğe sistemlerinin farklı koronal flaring eğeler ile kullanmasıyla oluşan dentin çatlaklarının dağılımları arasında istatistiksel olarak anlamlı bir fark yoktur (p>0,05). Tek eğe sistemlerine göre dentin çatlaklarının dağılımları arasında da istatistiksel olarak anlamlı bir fark bulunmamıştır (p>0,05). Bununla birlikte, koronal genişletme eğelerine göre dentin çatlaklarının dağılımları arasında istatistiksel olarak anlamlı bir fark yoktur (p>0,05). Sonuç: Tek eğe sistemlerinin koronal flaring estrümanları ile beraber kullanımının dentin çatlaklarının gözlemlenmesini azaltmıştır. One Flare eğeler, diğer koronal genişletme enstrümanlarına göre daha az dentin çatlağına neden olmuştur.
Anahtar Kelimeler: Koronal genişletme; microçatlak; tek eğe sistemleri; One Flare; WaveOne Gold
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