Comparison of the shaping ability of Mtwo and S5 NiTi rotary files in simulated canals

Yıl 2016, , 115 - 20, 18.08.2016

Demet Altunbaş , Alper Kuştarcı , Kerem Engin Akpınar , Dilara Arslan

https://doi.org/10.17214/aot.25724

Öz

OBJECTIVE: The aim of this study was to compare the shaping ability of Mtwo and S5 nickel-titanium rotary instruments during the preparation of simulated curved canals.

MATERIALS and METHOD: Forty simulated canals were randomly assigned to two groups (n=20). Canals were prepared to apical size 30 by using Mtwo or S5 files. Preoperative and postoperative images of the canals were obtained by using a digital camera, images were superimposed and aberrations were recorded. Material removal was measured at 5 different points. Statistical analysis was performed using Kolmogorov-Smirnov test, independent t-test and chi-square test at a significance level of 0.05.

RESULTS: The mean total width of the canals in the Mtwo group was significantly greater than the S5 group except the apical end-point of the preparation (p<0.05). Mean absolute transportation was less than 0.20 mm at all measurement points. However there were significant differences between the systems for the magnitude of the transportation at three points: halfway from the beginning of the curve to the orifice, beginning of the curve, and apex of the curve (p<0.05). S5 created significantly less transportation at the beginning of the curve and at the apex of the curve, but created significantly greater transportation at halfway from the beginning of the curve to the orifice (p<0.05). No perforation, ledge, zip, or elbow was created during instrumentation. One S5 instrument fractured, and two S5 and five Mtwo instruments deformed. A mean loss of working length of 0.21 mm for Mtwo and 0.22 mm for S5 was measured, with no statistically significant difference found between the groups (p>0.05).

CONCLUSION: Mtwo produced wider canal shape. S5 provided more centered apical preparation and maintained the original canal shape well.

Anahtar Kelimeler

Endodontics, root canal preparation, root canal therapy

Mtwo ve S5 NiTi döner kanal eğelerinin yapay kök kanalını şekillendirme etkinliklerinin karşılaştırılması

Öz

AMAÇ: Bu çalışmanın amacı, Mtwo ve S5 nikel-titanyum döner kanal eğelerinin yapay eğri kanalları şekillendirme etkinliklerinin karşılaştırılmasıdır.

GEREÇ ve YÖNTEM: Kırk adet yapay kanal rastgele iki gruba ayrıldı (n=20). Kanallar Mtwo ve S5 eğelerle apikal çap 30’a kadar şekillendirildi. Dijital kamera kullanılarak elde edilen preoperatif ve postoperatif kanal görüntüleri birleştirildi ve normalden sapmalar kaydedildi. Madde kaldırma 5 farklı noktada ölçüldü. İstatistiksel değerlendirme 0.05 anlamlılık düzeyinde Kolmogorov-Smirnov testi, independent t-testi ve ki-kare testi kullanılarak yapıldı.

BULGULAR: Kanalların ortalama toplam genişlikleri, şekillendirmenin apikal son noktası hariç Mtwo grubunda S5 grubundan anlamlı olarak daha fazlaydı (p<0.05). Ortalama transportasyon değeri tüm ölçüm noktalarında 0.20 mm’den azdı. Bununla birlikte, kanal ağzı ile eğimin başlangıcı arasındaki uzaklığın orta noktasında, eğimin başladığı noktada ve eğimin apeksinde transportasyon büyüklüğü yönünden iki sistem arasında anlamlı farklılık bulundu (p<0.05). S5 eğeleri eğimin başladığı noktada ve apeks noktasında daha az, kanal ağzı ile eğimin başlangıcı arasındaki uzaklığın orta noktasında daha fazla transportasyon oluşturdu (p<0.05). Şekillendirme sırasında hiçbir perforasyon, basamak, zip ve dirsek oluşturulmadı. Bir S5 eğe kırıldı; iki S5 ve beş Mtwo eğe deforme oldu. Ortalama çalışma boyu kaybı Mtwo için 0.21 mm ve S5 için 0.22 mm olarak ölçülmekle beraber iki grup arasında anlamlı bir fark bulunmadı (p>0.05).

SONUÇ: Mtwo daha geniş kanal şekli ortaya koydu. S5 daha merkezi bir apikal şekillendirme sağladı ve orijinal kanal şeklini daha iyi korudu.

Anahtar Kelimeler

Endodonti, kök kanal tedavisi, kök kanalını hazırlama

Kaynakça

• Azar MR, Mokhtare M. Rotary Mtwo system versus manual K-file instruments: efficacy in preparing primary and permanent molar root canals. Indian J Dent Res 2011;22:363.
• Sadeghi S. Shaping ability of NiTi rotary versus stainless steel hand instruments in simulated curved canals. Med Oral Patol Oral Cir Bucal 2011;16:e454-8.
• Ceyhanli KT, Kamaci A, Taner M, Erdilek N, Celik D. Shaping ability of two M-wire and two traditional nickel-titanium instrumentation systems in S-shaped resin canals. Niger J Clin Pract 2015;18:713-7.
• Altunbas D, Kutuk B, Kustarci A. Shaping ability of reciprocating single-file and full-sequence rotary instrumentation systems in simulated curved canals. Eur J Dent 2015;9:346-51.
• Vahid A, Roohi N, Zayeri F. A comparative study of four rotary NiTi instruments in preserving canal curvature, preparation time and change of working length. Aust Endod J 2009;35:93-7.
• Veltri M, Mollo A, Mantovani L, Pini P, Balleri P, Grandini S. A comparative study of Endoflare-Hero Shaper and Mtwo NiTi instruments in the preparation of curved root canals. Int Endod J 2005;38:610-6.
• Bürklein S, Hinschitza K, Dammaschke T, Schäfer E. Shaping ability and cleaning effectiveness of two single-file systems in severely curved root canals of extracted teeth: Reciproc and WaveOne versus Mtwo and ProTaper. Int Endod J 2012;45:449-61.
• VDW GmbH [Internet]. Available from: http://www.vdw-dental. com/fileadmin/redaktion/downloads/produkte/en/en-mtwo_anwender_ rev11.pdf (cited 2016 March 09).
• 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;41:548-52.
• Bürklein S, Börjes L, Schäfer E. Comparison of preparation of curved root canals with Hyflex CM and Revo-S rotary nickel-titanium instruments. Int Endod J 2014;47:470-6.
• Bürklein S, Benten S, Schäfer E. Shaping ability of different singlefile systems in severely curved root canals of extracted teeth. Int Endod J 2013;46:590-7.
• Aydin C, Inan U, Yasar S, Bulucu B, Tunca YM. Comparison of shaping ability of RaCe and Hero Shaper instruments in simulated curved canals. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2008;105:e92-7.
• Capar ID, Ertas H, Ok E, Arslan H, Ertas ET. Comparative study of different novel nickel-titanium rotary systems for root canal preparation in severely curved root canals. J Endod 2014;40:852-6.
• Schäfer E, Tepel J, Hoppe W. Properties of endodontic hand instruments used in rotary motion. Part 2. Instrumentation of curved canals. J Endod 1995;21:493-7.
• Yalpı Altun F, Uzun Ö. Resiprokasyon ve dönme hareketi yapan eğe sistemlerinin karşılaştırılması: uzaklaştırılan madde miktarı, toplam genişletme, kanal transportasyonu ve kanal eğimi değişimi. Acta Odontol Turc 2014;31:68-79.
• Hülsmann M, Peters OA, Dummer PMH. Mechanical preparation of root canals: shaping goals, techniques and means. Endod Topics 2005;10:30-76.
• Calberson FL, Deroose CA, Hommez GM, Raes H, De Moor RJ. Shaping ability of GTTM rotary files in simulated resin root canals. Int Endod J 2002;35:607-14.
• Schneider SW. A comparison of canal preparations in straight and curved root canals. Oral Surg Oral Med Oral Pathol 1971;32:271-5.
• Sendoline Perfect Endo [Internet]. Available from: http://www.sendoline.com/wp-content/uploads/2011/05/S5_User_Manual_eng.pdf (cited 2016 March 09).
• Malagino VA, Grande NM, Plotino G, Somma F. The Mtwo NiTi rotary system for root canal preparation. Roots 2006;3:67-70.
• Schäfer E, Erler M, Dammaschke T. Comparative study on the shaping ability and cleaning efficiency of rotary Mtwo instruments. Part 1. Shaping ability in simulated curved canals. Int Endod J 2006;39:196- 202.
• Paqué F, Musch U, Hülsmann M. Comparison of root canal preparation using RaCe and ProTaper rotary Ni-Ti instruments. Int Endod J 2005;38:8-16.
• Schäfer E, Lohmann D. Efficiency of rotary nickel-titanium FlexMaster instruments compared with stainless steel hand K-Flexofile--Part 1. Shaping ability in simulated curved canals. Int Endod J 2002;35:505-13.
• Perez F, Schoumacher M, Peli JF. Shaping ability of two rotary instruments in simulated canals: stainless steel ENDOflash and nickeltitanium HERO Shaper. Int Endod J 2005;38:637-44.
• Al-Omari MA, Dummer PM, Newcombe RG, Doller R. Comparison of six files to prepare simulated root canals. Part 2. Int Endod J 1992;25:67-81.