Özet:

Purpose: The purpose of this study is to compare the cyclic fatigue resistance of 3 different structural properties of nikel-titanium (Ni-Tialetin) using serum physiological and sodium hypochloride (NaOCl) solutions. Tool and Method: In the study, 6 experimental groups (n=15) were created and a total of 90 curves were used. Group 1: Protaper Universal (Dentsply Maillefer, Ballaigues, Switzerland), serum physiological; Group 2: Dia PT file (Dia-Dent, Cheongwon, Korea), serum physiological; Group 3: Dia X file (Dia-Dent, Cheongwon, Korea), serum physiological; Group 4: Protaper Universal, 5% NaOCl; Group 5: Dia PT file 5% NaOCl; Group 6: Dia X file, 5% NaOCl. Circular fatigue tests were carried out by placing solutions in the treasury of the experimental arrangement containing an artificial channel with a 60o curve 5 mm curve radius. The time passed until the curves were broken and the length of the broken piece was recorded. Results: In both solutions, Dia X curves, Dia PT and Protaper Universal curves were statistically significantly more resistant to cyclic fatigue. The cyclic fatigue resistance in the serum physiological solution of all curves was statistically significantly high when compared to sodium hypochloride. Result: In both solutions, the Dia X file-rotating curve system was found more resistant to cyclic fatigue compared to the Protaper Universal and Dia PT groups. Keywords: Dia PT file, Dia X file, Circular fatigue, Protaper Universal, Sodium Hypoclorit. Cyclic fatigue resistance of Nickel-Titanium Root Canal Instruments Manufactured with Various Methods in Sodium Hypochlorite and Saline Abstract Aim: The aim of this study was to compare the cyclic fatigue resistance of ProTaper Universal, Dia PT file and Dia X file which are produced with different machining procedures using saline and sodium hypochlorite solution. Materials and Methods: The study included six experimental groups (n = 15) and a total of 90 files. Group 1: Protaper Universal, saline; Group 2: Dia PT file, saline; Group 3: Dia X file, saline; Group 4: Protaper Universal, 5% NaOCl; Group 5: Dia PT file 5% NaOCl; Group 6: Dia X file, 5% NaOCl. The files were rotated in an artificial stainless steel canal with 5 mm radius, 60° angle of curvature and the instruments were dynamically immersed in either 5% sodium hypochlorite (NaOCl) or saline. The time to failure of files was recorded with a digital chronometer and fracture length was measured. Results: In both solutions Dia X files were significantly more resistant to cyclic fatigue compared to Dia PT and Protaper Universal files. The cyclic fatigue resistance of all files in the saline solution was significantly higher compared to sodium hypochlorite. Conclusion: In both solutions Dia X files were significantly more resistant to cyclic fatigue compared to Dia PT and Protaper Universal files. Keywords: Cyclic fatigue, Dia PT file, Dia X file, Protaper Universal, Sodium hypochlorite.

Anahtar Kelimeler:

Özet:

Amaç: Bu çalışmanın amacı; 3 farklı yapısal özellikteki nikel-titanyum (Ni-Tialetin döngüsel yorgunluk dirençlerini serum fizyolojik ve sodyum hipoklorit (NaOCl) çözeltileri kullanarak karşılaştırmaktır. Gereç ve Yöntem: Çalışmada 6 deney grubu (n=15) oluşturuldu ve toplamda 90 adet eğe kullanıldı. Grup 1: Protaper Universal (Dentsply Maillefer, Ballaigues, İsviçre), serum fizyolojik; Grup 2: Dia PT file (Dia-Dent, Cheongwon, Korea), serum fizyolojik; Grup 3: Dia X file (Dia-Dent, Cheongwon, Korea), serum fizyolojik; Grup 4: Protaper Universal, %5 NaOCl; Grup 5: Dia PT file %5 NaOCl; Grup 6: Dia X file, %5 NaOCl. Döngüsel yorgunluk testleri 60o eğim 5 mm eğim yarıçapına sahip yapay kanal içeren deney düzeneğinin haznesine solüsyonlar yerleştirilerek yapıldı. Eğelerin kırılıncaya kadar geçen süre ve kırılan parça uzunluğu kaydedildi. Bulgular: Her iki solüsyonda Dia X eğeleri, Dia PT ve Protaper Universal eğeleri ile karşılaştırıldığında döngüsel yorgunluğa istatistiksel olarak anlamlı derecede daha dirençli bulundu. Tüm eğelerin serum fizyolojik solüsyonundaki döngüsel yorgunluk direnci, sodyum hipoklorit ile kıyaslandığında istatistiksel olarak anlamlı derecede yüksek bulundu. Sonuç: Her iki solüsyonda da Dia X file döner eğe sistemi Protaper Universal ve Dia PT gruplarıyla karşılaştırıldığında döngüsel yorgunluğa daha dirençli bulunmuştur. Anahtar Kelimeler: Dia PT file, Dia X file, Döngüsel yorgunluk, Protaper Universal, Sodyum Hipoklorit. Cyclic Fatigue Resistance of Nickel-Titanium Root Canal Instruments Manufactured with Various Methods in Sodium Hypochlorite and Saline Abstract Aim: The aim of this study was to compare the cyclic fatigue resistance of ProTaper Universal, Dia PT file and Dia X file which are produced with different machining procedures using saline and sodium hypochlorite solution. Materials and Methods: The study included six experimental groups (n = 15) and a total of 90 files. Group 1: Protaper Universal, saline; Group 2: Dia PT file, saline; Group 3: Dia X file, saline; Group 4: Protaper Universal, 5% NaOCl; Group 5: Dia PT file 5% NaOCl; Group 6: Dia X file, 5% NaOCl. The files were rotated in an artificial stainless steel canal with 5 mm radius, 60° angle of curvature and the instruments were dynamically immersed in either 5% sodium hypochlorite (NaOCl) or saline. The time to failure of files was recorded with a digital chronometer and fracture length was measured. Results: In both solutions Dia X files were significantly more resistant to cyclic fatigue compared to Dia PT and Protaper Universal files. The cyclic fatigue resistance of all files in the saline solution was significantly higher compared to sodium hypochlorite. Conclusion: In both solutions Dia X files were significantly more resistant to cyclic fatigue compared to Dia PT and Protaper Universal files. Keywords: Cyclic fatigue, Dia PT file, Dia X file, Protaper Universal, Sodium hypochlorite.