Comparison of Dynamic And Static Cyclic Fatigue Resistances of Nickel-Titanium Canal Files

Yıl 2024, , 367 - 373, 30.08.2024

Emre Koçkat , Cangül Keskin

https://doi.org/10.58711/turkishjdentres.vi.1507862

Öz

Aim: The aim of this study was to compare the cyclic fatigue resistance of T-Endo Mis rotary system NiTi (nickel titanium) files in static and dynamic test setups.
Material and Method: In this study, ten T-Endo Mis nickel-titanium canal files were used until fracture in static and dynamic test setups with a curvature angle of 60° and a curvature radius of 5 mm in stainless steel artificial canals at temparature of 35 ± 2°C. Fracture times were visually and audibly detected and recorded with a digital chronometer. The lengths of the fractured fragments were precisely measured
with a digital caliper. After evaluating the normal distribution of data with the Kolmogorov-Smirnov test, an independent sample t-test was used to analyze the time until fracture, and the Mann-Whitney U test was used to analyze the lengths of the fractured fragments. Tests were conducted in SPSS software
(V.21, IBM, IL, USA) with a 5% significance threshold.
Results: After the conformity of the data to the normal distribution was tested, it was found that they were statistically similar as a result of comparing the time elapsed until decapitation and the broken part lengths between the two test models. (p > 0.05).
Conclusion: In this study, it was found that the static and dynamic cyclic fatigue resistances of T-Endo Mis NiTi files are similar.

Anahtar Kelimeler

Cyclic fatigue, Endodontics, Nickel titanium

Nikel Titanyum Kanal Eğesinin Dinamik ve Statik Döngüsel Yorgunluk Dayanımlarının Karşılaştırılması

Öz

Amaç: Bu çalışmanın amacı, T-Endo Mis döner sistem NiTi (nikel-titanyum) eğelerin döngüsel yorgunluk dayanımlarını statik ve dinamik test düzeneklerinde karşılaştırmaktır.
Gereç ve Yöntem: Bu çalışmada onar adet T-Endo Mis nikel titanyum kanal eğeleri, statik ve dinamik test düzeneklerinde 60° kurvatür açısı ve 5 mm kurvatür yarıçapına sahip paslanmaz çelik yapay kanallar içerisinde 35 ± 2 °C sıcaklıkta kırılıncaya kadar kullanıldı. Kırılma zamanları görsel ve işitsel
olarak tespit edilip dijital kronometre ile kaydedildi. Kırılan parça uzunlukları dijital kumpas ile ölçüldü. Verilerin normal dağılımı Kolmorogov-Smirnov testi ile değerlendirildikten sonra bağımsız örneklem t-testi kırılana kadar geçen süreyi, Mann-Whitney U testi ise kırık parça uzunluklarını analiz etmek için kullanıldı. Testler SPSS programında (V.21, IBM, IL, ABD) %5 anlamlılık eşiği ile yapıldı.
Bulgular: Verilerin normal dağılıma uygunluğu test edildikten sonra, kırılana kadar geçen süre ve kırık parça uzunluklarının iki test modeli arasında karşılaştırılması sonucu istatistiksel olarak benzer oldukları tespit edildi (p>0.05) Sonuç: Bu çalışmada T-Endo Mis NiTi eğelerin statik ve dinamik döngüsel yorgunluk dayanımlarının benzer olduğu ve kırık parça uzunluklarının arasında istatiksel olarak anlamlı bir fark olmadığı bulunmuştur.

Anahtar Kelimeler

Nikel titanyum, döngüsel yorgunluk, T-Endo Mis, Endodonti

Kaynakça

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