COMPARISON OF CYCLIC FATIGUE OF TWO DIFFERENT PEDODONTIC FILES IN 30° AND 45° CURVED ARTIFICIAL CANALS

Abstract

To compare the cyclic fatigue resistance (CFR) of Fanta Baby Rotary ve Scope mini pedodontic files in curved two artificial canals. A total of 60 new pedodontic files were tested in artificial canal with 30° and 45° angles of curvature. CFR was determined by recording the time to file fracture in the artificial canals. The length of each fractured fragment was also recorded. An independent sample t-test was used to analyse the data. In the artificial canal 30° angle of curvature, there was no statistically significant difference between Fanta Baby Rotary and Scope Mini files in terms of the CFR (P>0.05). In the artifical canal with a 45° angle of curvature, Fanta Baby Rotary files had greater the CFR than Scope mini files (p<0.05). There was no statistically significant difference between the files in terms of the lengths of fractured fragments in canals with 30° and 45° angles of curvature (p>0.05). Fanta Baby Rotary files exhibited greater the CFR than Scope mini files in an artificial canals with a 45° angle of curvature.

Keywords

• Curved canal
• cyclic fatigue resistance
• pedodontic files

İKİ FARKLI PEDODONTİK KANAL EĞESİNİN 30° VE 45° EĞİME SAHİP YAPAY KANALLARDA DÖNGÜSEL YORGUNLUKLARININ KARŞILAŞTIRILMASI

Abstract

Bu çalışmanın amacı 2 farklı eğime sahip yapay kanallarda Fanta Baby Rotary ve Scope Mini pedodontik kanal eğelerinin döngüsel yorgunluk direncini karşılaştırmaktır. Her eğe grubundan 30’ ar olmak üzere toplamda 60 yeni pedodontik eğe çalışmaya dâhil edildi. Eğeler 30° ve 45° kanal eğim açısına sahip paslanmaz çelikten yapılmış yapay kanallarda döngüsel yorgunluk testine tabi tutuldu. Eğeler kırılıncaya kadar geçen süre kaydedildi ve eğelerin kırılıncaya kadar gerçekleştirdiği tur sayısı hesaplandı. Eğelerin kırılmış parçalarının uzunlukları da kaydedildi. Elde edilen veriler bağımsız örneklem t testi ile istatistiksel olarak değerlendirildi. 30° eğime sahip yapay kanalda, Fanta Baby Rotary ve Scope Mini eğesi arasında döngüsel yorgunluk direnci açısından istatistiksel olarak anlamlı bir fark saptanmadı (p>0.05) 45° eğime sahip yapay kanalda, Fanta Baby Rotary eğesi, Scope Mini eğesinden daha yüksek döngüsel yorgunluk direncine sahipti (p<0.05). Eğelerin kırılmış parçalarının uzunlukları bakımından her iki eğime sahip kanalda da eğeler arasında istatistiksel olarak anlamlı fark yoktu (p>0.05). Fanta Baby Rotary eğeler 45° eğime sahip yapay bir kanalda Scope Mini eğelerinden daha yüksek döngüsel yorgunluk direnci sergiledi.

Keywords

• Döngüsel yorgunluk direnci
• eğimli kanal
• pedodontik eğeler

References

1. Chauhan A, Saini S, Dua P, Mangla R. Rotary Endodontics in Pediatric Dentistry: Embracing the New Alternative. Int J Clin Pediatr Dent 2019; 12(5):460-463.
2. George S, Anandaraj S, Issac JS, John SA, Harris A. Rotary endodontics in primary teeth - A review. Saudi Dent J 2016; 28(1):12-17.
3. Esentürk G, Akkas E, Cubukcu E, et al. A micro-computed tomographic assessment of root canal preparation with conventional and different rotary files in primary teeth and young permanent teeth. Int J Paediatr Dent 2020; 30(2):202-208.
4. McGuigan MB, Louca C, Duncan HF. Endodontic instrument fracture: causes and prevention. Br Dent J 2013; 214(7):341-348.
5. Pedullà E, Kharouf N, Caruso S, et al. Torsional, Static, and Dynamic Cyclic Fatigue Resistance of Reciprocating and Continuous Rotating Nickel-Titanium Instruments. J Endod 2022; 48(11):1421-1427.
6. Silva EJNL, Martins JNR, Lima CO, et al. Mechanical Tests, Metallurgical Characterization, and Shaping Ability of Nickel-Titanium Rotary Instruments: A Multimethod Research. J Endod 2020; 46(10):1485-1494.
7. 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):163-172.
8. Martins SCS, Silva JD, Garcia PR, et al. Influence of cyclic loading in NiTi austenitic and R-phase endodontic files from a finite element perspective. Clin Oral Investig 2022; 26(5):3939-3947.

9. Al-Obaida MI, Merdad K, Alanazi MS, et al. Comparison of Cyclic Fatigue Resistance of 5 Heat-treated Nickel-titanium Reciprocating Systems in Canals with Single and Double Curvatures. J Endod 2019; 45(10):1237-1241.
10. Topcuoglu HS, Topcuoglu G. Cyclic Fatigue Resistance of Reciproc Blue and Reciproc Files in an S-shaped Canal. J Endod 2017; 43(10):1679-1682.
11. AlShwaimi E. Cyclic fatigue resistance of a novel rotary file manufactured using controlled memory Ni-Ti technology compared to a file made from M-wire file. Int Endod J 2018; 51(1):112-117.
12. Topcuoglu HS, Topcuoglu G, Aktı A. Comparative evaluation of cyclic fatigue resistance of D-RaCe and ProTaper retreatment instruments in curved artificial canals. Int Endod J 2016; 49(6):604-609.
13. Ahmed HMA. Anatomical challenges, electronic working length determination and current developments in root canal preparation of primary molar teeth. Int Endod J 2013; 46(11):1011-1022.
14. Sobotkiewicz T, Huang X, Haapasalo M, et al. Effect of canal curvature location on the cyclic fatigue resistance of reciprocating files. Clin Oral Investig 2021; 25(1):169-177.
15. Chi D, Zhang Y, Lin X, Tong Z. Cyclic fatigue resistance for six types of nickel titanium instruments at artificial canals with different angles and radii of curvature. Dent Mater J 2021; 40(5):1129-1135.
16. Keskin C, Ozdemir OS, Aslantas K, et al. Static Cyclic Fatigue Resistance in Abrupt Curvature, Surface Topography, and Torsional Strength of R-Pilot and ProGlider Glide Path Instruments. J Endod 2021; 47(12):1924-1932.
17. Elnaghy AM, Elsaka SE. Cyclic Fatigue Resistance of One Curve, 2Shape, ProFile Vortex, Vortex Blue, and RaCe Nickel-Titanium Rotary Instruments in Single and Double Curvature Canals. J Endod 2018; 44(11):1725-1730.
18. Saleh AM, Vakili Gilani P, Tavanafar S, Schäfer E. Shaping ability of 4 different single-file systems in simulated S-shaped canals. J Endod 2015; 41(4):548-552.
19. El Abed R, Alshehhi A, Kang YJ, et al. Fracture Resistance of Heat-Treated Nickel-Titanium Rotary Files After Usage and Autoclave Sterilization: An In Vitro Study. J Endod 2022; 48(11):1428-1433.
20. De-Deus G, Leal Vieira VT, Nogueira da Silva EJ, et al. Bending resistance and dynamic and static cyclic fatigue life of Reciproc and WaveOne large instruments. J Endod 2014; 40(4):575-579.
21. Yao JH, Schwartz SA, Beeson TJ. Cyclic fatigue of three types of rotary nickel-titanium files in a dynamic model. J Endod 2006; 32(1):55-57.
22. Rodrigues RC, Lopes HP, Elias CN, et al. Influence of different manufacturing methods on the cyclic fatigue of rotary nickel-titanium endodontic instruments. J Endod 2011; 37(11):1553-1557.
23. Martins JNR, Silva EJNL, Marques D, et al. Design, metallurgical features, mechanical performance and canal preparation of six reciprocating instruments. Int Endod J 2021; 54(9):1623-1637.
24. Topcuoglu HS, Duzgun S, Aktı A, Topcuoglu G. Laboratory comparison of cyclic fatigue resistance of WaveOne Gold, Reciproc and WaveOne files in canals with a double curvature. Int Endod J 2017; 50(7):713-717.
25. Seracchiani M, Reda R, Zanza A, et al. Mechanical Performance and Metallurgical Characteristics of 5 Different Single-file Reciprocating Instruments: A Comparative In Vitro and Laboratory Study. J Endod 2022; 48(8):1073-1080.
26. Goo HJ, Kwak SW, Ha JH, Pedullà E, Kim HC. Mechanical Properties of Various Heat-treated Nickel-titanium Rotary Instruments. J Endod 2017; 43(11):1872-1877.
27. Elnaghy AM, Elsaka SE, Elshazli AH. Dynamic cyclic and torsional fatigue resistance of TruNatomy compared with different nickel-titanium rotary instruments. Aust Endod J 2020; 46(2):226-233.
28. Pedullà E, La Rosa GRM, Virgillito C, Rapisarda E, Kim HC, Generali L. Cyclic Fatigue Resistance of Nickel-titanium Rotary Instruments according to the Angle of File Access and Radius of Root Canal. J Endod 2020; 46(3):431-436.
29. Keleş A, Eymirli A, Uyanık O, Nagas E. Influence of static and dynamic cyclic fatigue tests on the lifespan of four reciprocating systems at different temperatures. Int Endod J 2019; 52(6):880-886.