Kullanılmış ve yeni Revo-S nikel titanyum eğelerin döngüsel yorgunluk dirençlerinin karşılaştırılması

Year 2023, Volume: 40 Issue: 1, 17 - 21, 03.01.2023

Koray Sürme , Hayri Akman , Hatice Büyüközer Özkan , Kürşat Er

https://doi.org/10.17214/gaziaot.1035204

Abstract

Amaç: Bu çalışmanın amacı, yapay kanallar kullanılarak yeni ve kullanılmış Revo-S nikel titanyum döner eğe sisteminin döngüsel yorgunluk (DY) dirençlerinin karşılaştırılmasıdır.

Gereç ve Yöntem: Her gruptan 12 adet olmak üzere toplam 72 adet yeni ve 2 defa klinikte kullanılmış Revo-S SC1 (25/.06), Revo-S SC2 (25/.04) ve Revo-S SU (25/.06) eğeler çalışmaya dahil edildi. DY direnci testleri için iç çapı 1.5 mm olan, 60° eğrilik açısı ve 5 mm eğrilik yarıçapına sahip olan kavisli bir yapay kanal içeren paslanmaz çelik blok kullanıldı. Deney sistemi distile su ile dolduruldu ve ortam sıcaklığı 35 ± 1 °C sıcaklıkta sabit tutuldu. Eğeler kırılma gerçekleşene kadar yapay kanal içinde çalıştırıldı. Her eğe için kırılma gerçekleşene kadar geçen süre kronometre ile kaydedildi ve eğelerin kırılıncaya kadar yaptıkları tur sayısı hesaplandı. Elde edilen veriler tek yönlü varyans analizi ve post-hoc Tukey testi kullanılarak değerlendirildi.

Bulgular: Eğelerin kırılıncaya kadar yaptığı ortalama tur sayısı en yüksek yeni SC2 eğe grubunda (912.3 ± 76.8), en düşük ise kullanılmış SU eğe grubunda (204.2 ± 59.6) bulundu. SC1 ve SC2 eğeler için yeni ve kullanılmış eğeler arasında DY direnci açısından istatistiksel olarak anlamlı bir fark gözlenmez iken (p>0.05), SU eğe grubunda anlamlı bir fark bulundu (p<0.05).

Sonuç: Çalışmamızın sınırlamaları dahilinde; klinik kullanım sonrasında tüm eğelerin DY direncinde azalma olduğu ancak bu azalmanın sadece SU eğe grubunda önemli olduğu bulundu.

Keywords

Döngüsel yorgunluk direnci, nikel titanyum, endodonti

Supporting Institution

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Project Number

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Thanks

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Comparison of cyclic fatigue resistance of used and new Revo-S nickel-titanium files

Abstract

Objective: The aim of this study was to compare the cyclic fatigue resistance of the new and used Revo-S nickel-titanium rotary file system using simulated canals.

Materials and Method: A total of 72 new and twice clinically used Revo-S SC1 (25/.06), Revo-S SC2 (25/.04), and Revo-S SU (25/.06) files, 12 from each group, were included in the study. For the cyclic fatigue resistance tests, a stainless-steel block with an inner diameter of 1.5 mm, a curved simulated canal with a 60° angle of curvature, and a radius of curvature of 5 mm was used. The test system was filled with distilled water and the temperature was kept constant at 35 ± 1 °C. The files were rotated in the simulated canal until fracture occurred. The time until fracture occurred for each file was recorded with a stopwatch and the number of cycles of the files to the fracture was calculated. Data were evaluated using 1-way analysis of variance and post-hoc Tukey test.

Results: The mean number of cycles of the files to the fracture was found to be the highest in the new SC2 group (912.3 ± 76.8), and the lowest in the used SU group (204.2 ± 59.6). While there was no statistically significant difference in cyclic fatigue resistance between new and used files for SC1 and SC2 files (p>0.05), a significant difference was found for SU (p<0.05).

Conclusion: Within the limitations of this study; it was found that there was a decrease in cyclic fatigue resistance of all files after clinical use, but this decrease was significant only in the SU file group.

Keywords

Cyclic fatigue resistance, nickel titanium, endodontics

Project Number

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