Kloroformun farklı nikel-titanyum retreatment eğe sistemlerinin döngüsel yorgunluk direncine etkisi

Year 2021, Volume: 8 Issue: 2, 327 - 331, 31.08.2021

Selen Küçükkaya Eren , Ahmet Keleş , Sevinc Askerbeyli Örs , Hacer Aksel

https://doi.org/10.15311/selcukdentj.606427

Abstract

Amaç: Bu çalışmanın amacı, kloroformun dört farklı retreatment eğe
sisteminin döngüsel yorgunluk direncine etkisini değerlendirmektir.

 Gereç ve Yöntemler: Bu çalışmada toplam 120 adet ProTaper D3,
D-Race DR2, Mtwo R2 ve R-Endo R3 retreatment eğeleri kullanıldı. Her sistemden
30 adet eğe, rastgele 2 gruba ayrıldı (n=15); Grup 1: kloroformda bekletilme
yapılmadı ve Grup 2: 5 dakika boyunca kloroformda bekletildi. Eğeler  kırılana kadar döngüsel yorgunluk direnci test
cihazında çalıştırıldı. Kırılana kadar olan döngü sayısı ve kırık parçaların
uzunluğu kaydedildi. Taramalı elektron mikroskobu ile görüntüler incelendi.
Elde edilen verilerin istatistiksel analizi iki yönlü varyans analizi ve Tukey
testleri ile yapıldı (p=0,05).

Bulgular: ProTaper D3 ve R-Endo R3 eğeleri
kloroformda bekletilse de bekletilmese de en yüksek döngüsel yorgunluk
direncini gösterdi (p>0,05). Kloroformda bekletme, eğelerin döngüsel
yorgunluk direncini etkilemedi (p>0,05). Mtwo R2 eğeleri, kloroform
uygulamasından önce de, sonra da D-Race DR2 eğelerinden anlamlı olarak döngüsel
yorgunluğa daha dirençliydi (p<0,05).

 Sonuç: Kloroform, retreatment eğelerinin döngüsel yorgunluk
direncini etkilemedi. Kloroform uygulamasından bağımsız olarak, ProTaper D3 ve
R-Endo R3 eğeleri diğer eğe sistemlerinden anlamlı olarak daha yüksek döngüsel
yorgunluk direnci gösterdi.

    Anahtar Kelimeler: döngüsel yorgunluk, endodonti, kloroform,
nikel-titanyum, yenileme

Keywords

döngüsel yorgunluk, endodonti, kloroform, nikel-titanyum

Effect of chloroform on the cyclic fatigue resistance of nickel-titanium retreatment instruments

Abstract

Background: The purpose of this study was to
evaluate the cyclic fatigue resistance of 4 different rotary nickel-titanium
(NiTi) retreatment instruments after immersion in chloroform solution.

Methods: A total of 120 ProTaper D3, R-Endo R3, D-Race DR2 and Mtwo
R2 retreatment instruments were used.
Thirty instruments of each system were randomly divided into 2 groups (n=15);
Group 1: no immersion and Group 2: immersion in chloroform for 5 min. The
instruments were operated in a dynamic cyclic fatigue test device until
fracture occurred. The number of cycles to fracture and length of the fractured
fragment for each instrument were recorded. Representative samples were
examined under a scanning electron microscope. Data were analyzed by using 2-way
analysis of variance and Bonferroni tests.

Results: The ProTaper D3 and R-Endo R3 instruments showed the
highest cyclic fatigue resistance whether or not immersed in chloroform (p<0.05).
The immersion in chloroform did not affect the cyclic fatigue resistance of the
instruments (p>0.05). The Mtwo R2
instruments were more resistant to cyclic fatigue than the D-Race DR2
instruments before and after immersed in chloroform (p<0.05).

Conclusion: The immersion in chloroform had no effect
on the cyclic fatigue resistance of retreatment instruments. The ProTaper D3
and R-Endo R3  instruments were more
resistant to cyclic fatigue than other retreatment instruments regardless of chloroform exposure.

 

Keywords: chloroform, cyclic fatigue, endodontics,
nickel-titanium, retreatment

Keywords

chloroform, cyclic fatigue, endodontics, nickel-titanium, retreatment

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