Amaç: Statik model altında HyFlex EDM, RC Gold ve G-Star nikel titanyum eğelerinin döngüsel yorgunluğa karşı dirençlerinin karşılaştırılmasıdır. Gereç ve Yöntemler: Yirmi G-Star (25/,06), 20 RC Gold File (25/,08) ve 20 HyFlex EDM (25/,08) çalışmaya dâhil edildi. Eğeler üretici firma talimatlarına uygun olarak 5 mm kurvatür yarı çapına, 60'' kanal kurvatür açısına ve 1,5 mm kanal iç çapına sahip paslanmaz çelikten yapılmış yapay kanallarda kırılıncaya kadar kullanıldı. Eğeler kırılıncaya kadar geçen süre dijital kronometre ile kaydedildi ve eğelerin kırılıncaya kadar yaptığı tur sayısı hesaplandı. Elde edilen veriler Kruskal-Wallis testi ile istatistiksel olarak değerlendirildi. Bulgular: Eğelerin kırılıncaya kadar yaptığı ortalama tur sayılarının yüksekten düşüğe sıralaması sırayla HyFlex EDM, RC Gold ve G-Star olarak bulundu. Bütün gruplar arasında istatistiksel olarak fark mevcuttu (p<0,05). Sonuç: Çalışmamız sınırları dâhilinde HEDM eğesinin döngüsel yorgunluğa karşı direnci, RC Gold File ve G-Star eğesinden daha yüksek bulunmuştur.
Anahtar Kelimeler: Endodonti; titanyum nikelid
Objective: To compare the cyclic fatigue resistance of HyFlex EDM, RC Gold and G-Star nickel titanium files under static model. Material and Methods: Twenty G-Star (25/.06), 20 RC Gold File (25/.08) and 20 HyFlex EDM (25/,08) nickel titanium files were included in the present study. According to the manufacturer instruction files were rotated in an artificial stainless steel with 5 mm radius, 60'D angle of curvature and 1.5 mm inner diameter. The time to failure of files was recorded with a digital chronometers and the number of cycles to failure of files were calculated. Kruskal-Wallis test was performed for statistically analyze. Results: The mean number of cycles to failure of files highest to lowest was HyFlex EDM, RC Gold and G-Star respectively. A statistically significant difference was noted between all the groups (p<0.05). Conclusion: Within the limitation of the present study the cyclic fatigue resistance of HyFlex EDM nickel titanium files was greater than the RC Gold and G-Star nickel titanium files.
Keywords: Endodontics; titanium nickelide
- Walia HM, Brantley WA, Gerstein H. An initial investigation of the bending and torsional properties of Nitinol root canal files. J Endod. 1988;14(7):346-51. [Crossref]
- Cheung GS. Instrument fracture: mechanisms, removal of fragments, and clinical outcomes. Endod Top. 2007;16(1):1-26. [Crossref]
- McGuigan MB, Louca C, Duncan HF. Endodontic instrument fracture: causes and prevention. Br Dent J. 2013;214(7):341-8. [Crossref] [PubMed]
- Sattapan B, Nervo GJ, Palamara JE, Messer HH. Defects in rotary nickel-titanium files after clinical use. J Endod. 2000;26(3):161-5. [Crossref]
- Peters OA, Gluskin AK, Weiss RA, Han JT. An in vitro assessment of the physical properties of novel Hyflex nickel-titanium rotary instruments. Int Endod J. 2012;45(11):1027-34. [Crossref] [PubMed]
- Özyürek T, Yılmaz K, Uslu G. Shaping ability of Reciproc, WaveOne GOLD, and HyFlex EDM single-file systems in simulated S-shaped canals. J Endod. 2017;43(5):805-9. [Crossref] [PubMed]
- Pedullà E, Lo Savio F, Boninelli S, Plotino G, Grande NM, La Rosa G, et al. Torsional and cyclic fatigue resistance of a new nickel-titanium instrument manufactured by electrical discharge machining. J Endod. 2016;42(1): 156-9. [Crossref] [PubMed]
- Özyürek T, Özerol NB. Comparison of cyclic fatigue resistance of Revo-S and G-Star NiTi Files. J Appl Dent Med Sci. 2016;15(12):112-4.
- Özyürek T. Cyclic fatigue resistance of Reciproc, WaveOne, and WaveOne Gold nickel-titanium instruments. J Endod. 2016;42(10): 1536-9. [Crossref] [PubMed]
- Shahabinejad H, Ghassemi A, Pishbin L, Shahravan A. Success of ultrasonic technique in removing fractured rotary nickel-titanium endodontic instruments from root canals and its effect on the required force for root fracture. J Endod. 2013;39(6):824-8. [Crossref] [PubMed]
- Cheung GS, Peng B, Bian Z, Shen Y, Darvell BW. Defects in ProTaper S1 instruments after clinical use: fractographic examination. Int Endod J. 2005;38(11):802-9. [Crossref] [PubMed]
- Gündoğar M, Özyürek T. Cyclic fatigue resistance of OneShape, HyFlex EDM, WaveOne gold, and Reciproc blue nickel‐titanium instruments. J Endod. 2017;43(7):1192-6. [Crossref] [PubMed]
- Ferreira F, Adeodato C, Barbosa I, Aboud L, Scelza P, Zaccaro Scelza M. Movement kinematics and cyclic fatigue of NiTi rotary instruments: a systematic review. Int Endod J. 2016;50(2):143-52. [Crossref] [PubMed]
- Shen Y, Zhou HM, Zheng YF, Peng B, Haapasalo M. Current challenges and concepts of the thermomechanical treatment of nickel-titanium instruments. J Endod. 2013;39(2):163-72. [Crossref] [PubMed]
- Pirani C, Iacono F, Generali L, Sassatelli P, Nucci C, Lusvarghi L, et al. HyFlex EDM: superficial features, metallurgical analysis and fatigue resistance of innovative electro discharge machined NiTi rotary instruments. Int Endod J. 2015;49(5):483-93. [Crossref] [PubMed]
- Kaval ME, Capar ID, Ertas H. Evaluation of the cyclic fatigue and torsional resistance of novel nickel-titanium rotary files with various alloy properties. J Endod. 2016;42(12):1840-3. [Crossref] [PubMed]
- Cheung GS, Zhang EW, Zheng YF. A numerical method for predicting the bending fatigue life of NiTi and stainless steel root canal instruments. Int Endod J. 2011;44(4):357-61. [Crossref] [PubMed]
- De-Deus G, Moreira EJ, Lopes HP, Elias CN. Extended cyclic fatigue life of F2 ProTaper instruments used in reciprocating movement. Int Endod J. 2010;43(12):1063-8. [Crossref] [PubMed]
- Varela-Pati-o P, Iba-ez-Párraga A, Rivas-Mundi-a B, Cantatore G, Otero XL, Martin-Biedma B. Alternating versus continuous rotation: a comparative study of the effect on instrument life. J Endod. 2010;36(1):157-9. [Crossref] [PubMed]
- Karataş E, Arslan H, Büker M, Seçkin F, Çapar ID. Effect of movement kinematics on the cyclic fatigue resistance of nickel-titanium instruments. Int Endod J. 2016;49(4):361-4. [Crossref] [PubMed]
- Pedullà E, Grande NM, Plotino G, Gambarini G, Rapisarda E. Influence of continuous or reciprocating motion on cyclic fatigue resistance of 4 different nickel-titanium rotary instruments. J Endod. 2013;39(2):258-61. [Crossref] [PubMed]
- Ye J, Gao Y. Metallurgical characterization of M-Wire nickel titanium shape memory alloy used for endodontic rotary instruments during low-cycle fatigue. J Endod. 2012;38(1):105-7. [Crossref] [PubMed]
- Topçuoğlu HS, Topçuoğlu G, Aktı A. Comparative evaluation of cyclic fatigue resistance of D-Race and ProTaper retreatment instruments in artificial curved canals. Int Endod J. 2015;49(6):604-9. [Crossref] [PubMed]
- Vadhana S, SaravanaKarthikeyan B, Nandini S, Velmurugan N. Cyclic fatigue resistance of RaCe and Mtwo rotary files in continuous rotation and reciprocating motion. J Endod. 2014;40(7):995-9. [Crossref] [PubMed]
.: İşlem Listesi