EVALUATION OF 2 NICKEL-TITANIUM INSTRUMENT SYSTEMS IN SHAPING ROOT CANALS

Year 2019, Volume: 29 Issue: 3, 400 - 406, 16.07.2019

Şenay Yaşar Şeyda Erşahan , Cumhur Aydın

https://doi.org/10.17567/ataunidfd.471219

Cited By: 1

Abstract

Evaluation of 2 Nickel-Titanium Instrument Systems in
Shaping Root Canals

Abstract

Objective: To evaluate root canal enlargement following mechanical shaping using 2
nickel titanium rotary systems in simulated curved canals.

Material and Method: Thirty simulated canals in
resin blocks were divided into two experimental groups, each comprising 15
resin blocks, and prepared with Twisted files (TF) and RaCe rotary files using crown-down technique. Preoperative
and postoperative photographs, taken using a digital camera, were superimposed
and aberrations were recorded. The amount of resin removed was measured at 11
different points, beginning at the apical terminus of the canal. Instrument
failure, outer and inner width measurements, transportation rate, and centering
ability were recorded on each central canal path and differences between groups
were statistically analyzed using Student’s t test.

Results: No instrument
fracture occurred during preparation. RaCe instruments removed more material
from the outer canal walls in the apical section (p < 0.01) and from the
inner canal walls in the middle section (p < 0.01) of the canals compared to
TF. However, canals prepared with TF instruments resulted in less
transportation (p < 0.05) in the middle section. No significant differences
were found between the two groups in terms of centering ability in apical,
middle, or coronal sections.  (p >
0.05).

Conclusions: RaCe instruments
removed more resin from the outside of the apical curvature and from the inner side
of the coronal curvature compared to TF. In addition, mean transportation
amount was significantly high for RaCe in middle section (i.e., coronal
curvature). Regarding canal centering ability, however, both instruments
retained original canal geometry and performed similarly.

Key words: Twisted File, RaCe, Curved
root canals, Canal transportation, Centering ability, Ni-Ti rotary
systems

 

 Kök
Kanallarını Şekillendirmesinde İki Nikel Titanyum Alet Sisteminin
Değerlendirilmesi

Amaç: Simüle edilmiş
eğri kanallarda 2 nikel titanyum döner alet sistemi kullanılarak mekanik
şekillendirme sonrası kök kanal genişlemesinin değerlendirilmesi.

Gereç
ve Yöntem: Reçine bloklardaki otuz adet simüle
edilmiş kanal, her biri 15 adet rezin bloğu içeren iki deney grubuna ayrıldı ve
Twisted files (TF) ve RaCe döner eğeleri kullanılarak crown-down tekniğiyle
şekillendirildi. Bir dijital kamera
kullanılarak çekilen preoperatif ve postoperatif fotoğraflar çakıştırıldı ve sapmalar
kaydedildi. Kaldırılan rezin miktarı, kanalın apikal sonlanmasından başlayarak
11 farklı noktada ölçülmüştür. Her bir kanal yolundaki dış ve iç genişlik
ölçümleri, transportasyon oranı, merkezde kalma yeteneği ve alet kırığı
kaydedildi ve gruplar arasındaki farklar Student t testi kullanılarak
istatistiksel olarak analiz edildi.

Bulgular: Preparasyon sırasında alet kırılması
meydana gelmedi. RaCe eğeleri TF’e kıyasla kanalların apikal kısımdaki dış
kanal duvarlarından (p <0.01) ve orta kesitindeki iç kanal duvarlarından (p
<0.01) daha fazla materyal kaldırdı. Ancak, TF eğeleriyle hazırlanan
kanallarda orta kısımda daha az transportasyon görüldü (p < 0.05).  İki grup arasında, apikal, orta veya koronal
kesitlerde merkezde kalma yeteneği açısından anlamlı fark bulunmadı (p >
0.05).

Sonuçlar: RaCe eğeleri TF’e kıyasla, apikal
kurvatürün dışından ve koronal kurvatürün iç kısmından daha fazla rezin kaldırmıştır.
Ek olarak, ortalama transportasyon miktarı orta kısımda RaCe için anlamlı
derecede yüksekti (yani koronal eğrilik). Bununla birlikte kanalın merkezinde
kalma yeteneği ile ilgili olarak, her iki enstrüman da orijinal kanal
geometrisini korudu ve kanalı benzer şekilde şekillendirdi.

Anahtar kelimeler: Twisted File, RaCe, Eğri  kök kanalları, Kanal transportasyonu, Merkezde kalma yeteneği, Ni-Ti döner alet sistemleri

Keywords

Twisted File, RaCe, Curved root canals, Canal transportation, Centering ability

References

• 1. Schilder H. Cleaning and shaping the root canal. Dent Clin North Am 1974;18:269-96.
• 2. Esposito PT, Cunningham CJ. A comparison of canal preparation with nickel-titanium and stainless steel instruments. J Endod 1995;21:173-6.
• 3. Gergi R, Osta N, Bourbouze G, Zgheib C, Arbab-Chirani R, Naaman A. Effects of three nickel titanium instrument systems on root canal geometry assessed by micro-computed tomography. Int Endod J 2015;48:162-70.
• 4. Koch K, Brave D. Real world endo: design features of rotary files and how they affect clinical performance. Oral Health 2002;92:39–49.
• 5. Hulsmann M, Peters OA, Dummer PMH. Mechanical preparation of root canals: shaping goals, techniques and means. Endod Topics 2005;10:30–76.
• 6. Peters OA. Current challenges and concepts in the preparation of root canal systems: a review. J Endod 2004;30:559–67.
• 7. Gambarini G, Testarelli L, De Luca M, Milana V, Plotino G, Grande NM, et al. The influence of three different instrumentation techniques on the incidence of postoperative pain after endodontic treatment. Ann Stomatol (Roma) 2013;4:152-5.
• 8. Pagliosa A, Sousa-Neto MD, Versiani MA, Raucci-Neto W, Silva-Sousa YT, Alfredo E. Computed tomography evaluation of rotary sys¬tems on the root canal transportation and centering ability. Brazilian oral research. 2015;29: pii: S1806-83242015000100240.
• 9. Gambarini G, Grande NM, Plotino G, Somma F, Garala M, De Luca M, et al. Fatigue resistance of engine-driven rotary nickel-titanium instruments produced by new manufacturing methods. J Endod 2008;34:1003–5.
• 10. Larsen M, Watanabe I, Glickman GN, He J. Cyclic fatigue analysis of a new generation of nickel titanium rotary instruments. J Endod 2009;35:401–3.
• 11. Ceyhanli KT, Erdilek N, Tatar I, Çetintav B. Comparative micro-computed tomography evaluation of apical root canal transportation with the use of ProTaper, RaCe and Safesider systems in human teeth. Aust Endod J 2014;40:12-6.
• 12. Nabavizadeh M, Abbaszadegan A, Khojastepour L, Amirhosseini M, Kiani E. A comparison of apical transportation in severely curved canals by Reciproc and BioRaCe systems. Iran Endod J 2014;9:117-22.
• 13. Pasqualini D, Alovisi M, Cemenasco A, Mancini L, Paolino DS, Bianchi CC, et al. Micro-computed tomography evaluation of ProTaper Next and BioRaCe shaping outcomes in maxillary first molar curved canals. J Endod 2015;41:1706-10.
• 14. Schneider SW. A comparison of canal preparations in straight and curved root canals. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 1971;32:271-5.
• 15. Thompson SA, Dummer PMH. Shaping ability of Hero 642 rotary nickel-titanium instruments in simulated root canals: part 2. Int Endod J 2000;33:255-61.
• 16. Paque F, Laib A, Gautschi H, Zehnder M. Hard-tissue debris accumulation analysis by high-resolution computed tomography scans. J Endod 2009;35:1044–7.
• 17. Schafer E, Oitzinger M. Cutting efficiency of five different types of rotary nickel-titanium instruments. J Endod 2008;34:198-200.
• 18. 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.
• 19. American Association of Endodontists. Glossary of Endodontic Terms, 7th edn. Chicago: AAE, 2003.
• 20. Jafarzadeh H, Abbott PV. Ledge formation: review of a great challenge in endodontics. J Endod 2007:33:1155–1162.
• 21. Schafer E. Relationship between design features of endodontic instruments and their properties. Part 2: instrumentation of curved canals. J Endod 1999:25:56–59.
• 22. Lam TV, Lewis DJ, Atkins DR, Macfarlane RH, Clarkson RM, Whitehead MG, Brockhurst PJ, Moule AJ. Changes in root canal morphology in simulated curved canals over-instrumented with a variety of stainless steel and nickel titanium files. Aust Dent J 1999:44:12–19.
• 23. Andradw-Junior CV, Neto ND, Rodrigues RC, Antunes HS, Porpino MT, Carvalhal JA, Armada L. Transportation assessment in simulated curved canals after preparation with Twisted File Adaptive and BT-Race instruments. J Clin Exp Dent 2017;1:e1136-e1140.
• 24. Honardar K, Assadian H, Shahab S, Jafari Z, Kazemi A, Nazarimoghaddam K, Kharrazifard MJ, Labbaf H. Cone-beam computed tomographic assessment of canal centering ability and transportation after preparation with Twisted File and Bio RaCe instrumentation. J Dent (Tehran) 2014;11:440-446.
• 25. Schafer E, Dzepina A, Danesh G. Bending properties of rotary nickel-titanium instruments. Oral Surg Oral Med Oral Path Oral Radiol Endod 2003;96:757-63.
• 26. Bergmans L, Van Cleynenbreugel J, Beullens M, Wevers M, Van Meerbeek B, Lambrechts P. Progressive versus constant tapered shaft design using NiTi rotary instruments. Int Endod J 2003;36:288-95.
• 27. Schafer 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.
• 28. Kum KY, Spanberg L, Cha BY, Young J, Seung-Jong L, Chan-Young L. Shaping ability of three ProFile rotary instrumentation techniques in simulated resin root canals. J Endod 2000;26:719-23.
• 29. Gündoğdu EC, Doğanay E, Arslan H. Nikel titanium aletlerin kırılmalrının sebep ve çözümlerine yönelik anket çalışması. Atatürk Univ Diş Hek Fak Derg 2017;27:130-8.