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
References
- 1. Torabinejad M, Corr R, Handysides R, Shabahang S. Outcomes of nonsurgical retreatment and endodontic surgery: a systematic review. J Endod 2009;35:930-7.
- 2. Rios Mde A, Villela AM, Cunha RS, Velasco RC, De Martin AS, Kato AS, et al. Efficacy of 2 reciprocating systems compared with a rotary retreatment system for gutta-percha removal. J Endod 2014;40:543-6.
- 3. Topcuoglu HS, Topcuoglu G, Akti A. Comparative evaluation of cyclic fatigue resistance of D-RaCe and ProTaper retreatment instruments in curved artificial canals. Int Endod J 2016;49:604-9.
- 4. Rossi-Fedele G, Ahmed HM. Assessment of root canal filling removal effectiveness using micro-computed tomography: a systematic review. J Endod 2017;43:520-26.
- 5. Verma P, Tordik P, Nosrat A. Hazards of improper dispensary: literature review and report of an accidental chloroform injection. J Endod 2018;44:1042-47.
- 6. Chutich MJ, Kaminski EJ, Miller DA, Lautenschlager EP. Risk assessment of the toxicity of solvents of gutta-percha used in endodontic retreatment. J Endod 1998;24:213-6.
- 7. Canakci BC, Ustun Y, Er O, Genc Sen O. Evaluation of apically extruded debris from curved root canal filling removal using 5 nickel-titanium systems. J Endod 2016;42:1101-4.
- 8. Can Saglam B, Gorgul G. Evaluation of surface alterations in different retreatment nickel-titanium files: AFM and SEM study. Microsc Res Tech 2015;78:356-62.
- 9. Parashos P, Gordon I, Messer HH. Factors influencing defects of rotary nickel-titanium endodontic instruments after clinical use. J Endod 2004;30:722-5.
- 10. Lopes HP, Elias CN, Vieira MV, Siqueira JF, Jr., Mangelli M, Lopes WS, et al. Fatigue life of Reciproc and Mtwo instruments subjected to static and dynamic tests. J Endod 2013;39:693-6.
- 11. Keskin C, Inan U, Demiral M, Keles A. Cyclic fatigue resistance of R-Pilot, WaveOne Gold Glider, and ProGlider glide path instruments. Clin Oral Investig 2018;22:3007-12.
- 12. Inan U, Aydin C. Comparison of cyclic fatigue resistance of three different rotary nickel-titanium instruments designed for retreatment. J Endod 2012;38:108-11.
- 13. Topcuoglu HS, Pala K, Akti A, Duzgun S, Topcuoglu G. Cyclic fatigue resistance of D-RaCe, ProTaper, and Mtwo nickel-titanium retreatment instruments after immersion in sodium hypochlorite. Clin Oral Investig 2016;20:1175-9.
- 14. Hussne RP, Braga LC, Berbert FL, Buono VT, Bahia MG. Flexibility and torsional resistance of three nickel-titanium retreatment instrument systems. Int Endod J 2011;44:731-8.
- 15. Diemer F, Calas P. Effect of pitch length on the behavior of rotary triple helix root canal instruments. J Endod 2004;30:716-8.
- 16. Topcuoglu HS, Demirbuga S, Tuncay O, Pala K, Arslan H, Karatas E. The effects of Mtwo, R-Endo, and D-RaCe retreatment instruments on the incidence of dentinal defects during the removal of root canal filling material. J Endod 2014;40:266-70.
- 17. Marques da Silva B, Baratto-Filho F, Leonardi DP, Henrique Borges A, Volpato L, Branco Barletta F. Effectiveness of ProTaper, D-RaCe, and Mtwo retreatment files with and without supplementary instruments in the removal of root canal filling material. Int Endod J 2012;45:927-32.
- 18. Pedulla E, Franciosi G, Ounsi HF, Tricarico M, Rapisarda E, Grandini S. Cyclic fatigue resistance of nickel-titanium instruments after immersion in irrigant solutions with or without surfactants. J Endod 2014;40:1245-9.
- 19. Rodig T, Hausdorfer T, Konietschke F, Dullin C, Hahn W, Hulsmann M. Efficacy of D-RaCe and ProTaper Universal Retreatment NiTi instruments and hand files in removing gutta-percha from curved root canals - a micro-computed tomography study. Int Endod J 2012;45:580-9.
- 20. Unal GC, Kaya BU, Tac AG, Kececi AD. A comparison of the efficacy of conventional and new retreatment instruments to remove gutta-percha in curved root canals: an ex vivo study. Int Endod J 2009;42:344-50.
- 21. Zuolo AS, Mello JE, Jr., Cunha RS, Zuolo ML, Bueno CE. Efficacy of reciprocating and rotary techniques for removing filling material during root canal retreatment. Int Endod J 2013;46:947-53.
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
References
- 1. Torabinejad M, Corr R, Handysides R, Shabahang S. Outcomes of nonsurgical retreatment and endodontic surgery: a systematic review. J Endod 2009;35:930-7.
- 2. Rios Mde A, Villela AM, Cunha RS, Velasco RC, De Martin AS, Kato AS, et al. Efficacy of 2 reciprocating systems compared with a rotary retreatment system for gutta-percha removal. J Endod 2014;40:543-6.
- 3. Topcuoglu HS, Topcuoglu G, Akti A. Comparative evaluation of cyclic fatigue resistance of D-RaCe and ProTaper retreatment instruments in curved artificial canals. Int Endod J 2016;49:604-9.
- 4. Rossi-Fedele G, Ahmed HM. Assessment of root canal filling removal effectiveness using micro-computed tomography: a systematic review. J Endod 2017;43:520-26.
- 5. Verma P, Tordik P, Nosrat A. Hazards of improper dispensary: literature review and report of an accidental chloroform injection. J Endod 2018;44:1042-47.
- 6. Chutich MJ, Kaminski EJ, Miller DA, Lautenschlager EP. Risk assessment of the toxicity of solvents of gutta-percha used in endodontic retreatment. J Endod 1998;24:213-6.
- 7. Canakci BC, Ustun Y, Er O, Genc Sen O. Evaluation of apically extruded debris from curved root canal filling removal using 5 nickel-titanium systems. J Endod 2016;42:1101-4.
- 8. Can Saglam B, Gorgul G. Evaluation of surface alterations in different retreatment nickel-titanium files: AFM and SEM study. Microsc Res Tech 2015;78:356-62.
- 9. Parashos P, Gordon I, Messer HH. Factors influencing defects of rotary nickel-titanium endodontic instruments after clinical use. J Endod 2004;30:722-5.
- 10. Lopes HP, Elias CN, Vieira MV, Siqueira JF, Jr., Mangelli M, Lopes WS, et al. Fatigue life of Reciproc and Mtwo instruments subjected to static and dynamic tests. J Endod 2013;39:693-6.
- 11. Keskin C, Inan U, Demiral M, Keles A. Cyclic fatigue resistance of R-Pilot, WaveOne Gold Glider, and ProGlider glide path instruments. Clin Oral Investig 2018;22:3007-12.
- 12. Inan U, Aydin C. Comparison of cyclic fatigue resistance of three different rotary nickel-titanium instruments designed for retreatment. J Endod 2012;38:108-11.
- 13. Topcuoglu HS, Pala K, Akti A, Duzgun S, Topcuoglu G. Cyclic fatigue resistance of D-RaCe, ProTaper, and Mtwo nickel-titanium retreatment instruments after immersion in sodium hypochlorite. Clin Oral Investig 2016;20:1175-9.
- 14. Hussne RP, Braga LC, Berbert FL, Buono VT, Bahia MG. Flexibility and torsional resistance of three nickel-titanium retreatment instrument systems. Int Endod J 2011;44:731-8.
- 15. Diemer F, Calas P. Effect of pitch length on the behavior of rotary triple helix root canal instruments. J Endod 2004;30:716-8.
- 16. Topcuoglu HS, Demirbuga S, Tuncay O, Pala K, Arslan H, Karatas E. The effects of Mtwo, R-Endo, and D-RaCe retreatment instruments on the incidence of dentinal defects during the removal of root canal filling material. J Endod 2014;40:266-70.
- 17. Marques da Silva B, Baratto-Filho F, Leonardi DP, Henrique Borges A, Volpato L, Branco Barletta F. Effectiveness of ProTaper, D-RaCe, and Mtwo retreatment files with and without supplementary instruments in the removal of root canal filling material. Int Endod J 2012;45:927-32.
- 18. Pedulla E, Franciosi G, Ounsi HF, Tricarico M, Rapisarda E, Grandini S. Cyclic fatigue resistance of nickel-titanium instruments after immersion in irrigant solutions with or without surfactants. J Endod 2014;40:1245-9.
- 19. Rodig T, Hausdorfer T, Konietschke F, Dullin C, Hahn W, Hulsmann M. Efficacy of D-RaCe and ProTaper Universal Retreatment NiTi instruments and hand files in removing gutta-percha from curved root canals - a micro-computed tomography study. Int Endod J 2012;45:580-9.
- 20. Unal GC, Kaya BU, Tac AG, Kececi AD. A comparison of the efficacy of conventional and new retreatment instruments to remove gutta-percha in curved root canals: an ex vivo study. Int Endod J 2009;42:344-50.
- 21. Zuolo AS, Mello JE, Jr., Cunha RS, Zuolo ML, Bueno CE. Efficacy of reciprocating and rotary techniques for removing filling material during root canal retreatment. Int Endod J 2013;46:947-53.
Details
| Primary Language | English |
|---|---|
| Subjects | Dentistry |
| Journal Section | Research |
| Authors | |
| Publication Date | August 31, 2021 |
| Submission Date | August 19, 2019 |
| Published in Issue | Year 2021 Volume: 8 Issue: 2 |
Selcuk Dental Journal is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY NC).