Shaping efficacy of three instruments in curved root canal preparation

doi:10.3877/cma.j.issn.1674-1366.2014.02.005

Abstract

Abstract:

Objective

To evaluate the shaping efficacy of K files， Safesiders files and HERO Shaper files in curved root canal preparation of human teeth in vitro.

Methods

Sixty mandibular premolars with curved root canal were divided into three groups randomly， and prepared by K files，Safesiders files and HERO Shaper files respectively. Compound meglumine diatrizoate was injected into root canals and X-ray graphs of teeth were taken before and after instrumentation. The amount of dentin removed from inner and outer walls， centering ability and degree of straightening of root canal after preparation were analyzed.

Results

Safesiders files and HERO Shaper files removed less dentin from inner and outer walls than K files at all measuring points （P＜0.05）. Safesiders files group displayed more dentin removed than HERO Shaper files group， however， the differences were not statistically significant except for the 3 mm and 4 mm measuring points in inner walls （P＜0.05）. Safesiders files group and HERO Shaper files group showed better centering ability than K files group at measuring points below 5 mm （P＜0.05）， and differences between Safesiders files group and HERO Shaper files group was not statistically significant （P＞0.05）. The use of K files resulted in more straightening of root canal after instrumentation compared to other instruments （P＜0.05）， and the differences between Safesiders files group and HERO Shaper files group was not significant （P＞0.05）.

Conclusions

K files， Safesiders files and HERO Shaper files caused transportation when preparing curved root canals. Safesiders files and HERO Shaper files showed less transportation and better shaping efficacy.

Key words: NiTi instrument, Root canal preparation, Curved root canal

Peilin Zhuang, Jiantao Ye, Zhuoshan Huang, Yansong Yu, Hong Wu. Shaping efficacy of three instruments in curved root canal preparation[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2014, 8(02): 112-117.

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Figures/Tables 8

References 19

［1］	Peters OA， Paque F. Current developments in rotary root canal instrument technology and clinical use：a review［J］. Quintessence Int， 2010，41（6）：479-488.
［2］	Metzger Z. From files to SAF： 3D endodontic treatment is possible at last ［J］. Alpha Omegan， 2011，104（1-2）：36-44.
［3］	Schneider SW. A comparison of canal preparations in straight and curved root canals ［J］. Oral Surg Oral Med Oral Pathol，1971，32（2）：271-275.
［4］	Bürklein S， Hinschitza K， Dammaschke T， et al. Shaping ability and cleaning effectiveness of two single-file systems in severely curved root canals of extracted teeth： Reciproc and Wave One versus Mtwo and ProTaper ［J］. Int Endod J， 2012，45（5）：449-461.
［5］	Iqbal MK， Maggiore F， Suh B， et al. Comparison of apical transportation in four Ni-Ti rotary instrumentation techniques［J］. J Endod， 2003，29（9）：587-591.
［6］	Maryam E， Samir Z， Ali AM， et al. An ex-vivo study on the shaping parameters of two nickel-titanium rotary systems compared with hand instruments ［J］. Iran Endod J， 2011，6（2）：74-79.
［7］	Franco V， Fabiani C， Taschieri S， et al. Investigation on the shaping ability of nickel-titanium files when used with a reciprocating motion ［J］. J Endod， 2011，37（10）：1398-1401.
［8］	Yamamura B， Cox TC， Heddaya B， et al. Comparing canal transportation and centering ability of endosequence and vortex rotary files by using micro-computed tomography ［J］. J Endod，2012，38（8）：1121-1125.
［9］	Freire LG， Gavini G， Cunha RS， et al. Assessing apical transportation in curved canals： comparison between crosssections and micro-computed tomography ［J］. Braz Oral Res，2012， 26（3）：222-227.
［10］	Bramante CM， Berbert A， Borges RP. A methodology for evaluation of root canal instrumentation ［J］. J Endod， 1987，13（5）：243-245.
［11］	Bartha K， Dobó NC， Bernáth M， et al. Comparison of the planimetric and gravimetric methods in the study of the efficiency of endodontic instruments ［J］. Fogorv Sz， 1995，88（4）：127-132.
［12］	Gao Y， Gutmann JL， Wilkinson K， et al. Evaluation of the impact of raw materials on the fatigue and mechanical properties of ProFile Vortex rotary instruments ［J］. J Endod，2012， 38（3）：398-401.
［13］	Gutmann JL， Gao Y. Alteration in the inherent metallic and surface properties of nickel-titanium root canal instruments to enhance performance， durability and safety： a focused review［J］. Int Endod J， 2012，45（2）：113-128.
［14］	Gergi R， Rjeily JA， Sader J， et al. Comparison of canal transportation and centering ability of twisted files， Pathfile-ProTaper system， and stainless steel hand K-files by using computed tomography ［J］. J Endod， 2010，36（5）：904-907.
［15］	Yang GB， Zhou XD， Zheng YL， et al. Shaping ability of progressive versus constant taper instruments in curved root canals of extracted teeth ［J］. Int Endod J， 2007，40（9）：707-714.
［16］	Venkateshbabu N，Emmanuel S，Santosh GK，et al. Comparison of the canal centring ability of K3， Liberator and EZ Fill Safesiders by using spiral computed tomography ［J］. Aust Endod J， 2012，38（2）：55-59.
［17］	Rhodes SC， Hülsmann M， McNeal SF， et al. Comparison of root canal preparation using reciprocating Safesiders stainless steel and Vortex nickel-titanium instruments ［J］. Oral Surg Oral Med Oral Pathol Oral Radiol Endod， 2011，111（5）：659-667.
［18］	Musikant BL，Cohen BI，Deutsch AS. Comparison instrumentation reamers and files versus a flat-sided design of conventional noninterrupted， flat-sided design ［J］. J Endod， 2004，30（2）：107-109.
［19］	Wan J， Rasimick BJ， Musikant BL， et al. Cutting efficiency of 3 different instrument designs used in reciprocation ［J］. Oral Surg Oral Med Oral Pathol Oral Radiol Endod， 2010，109（5）：e82-e85.

K锉		Safesiders锉		HERO Shaper锉
号码/锥度	长度/mm	号码/锥度	长度/mm	号码/锥度	长度/mm
20/02	WL	20/02	WL	20/06	冠方2/3
25/02	WL	20/04	WL	25/04	WL
30/02	WL	25/02	WL	30/04	WL
35/02	WL-1	30/02	WL
40/02	WL-2	25/08	WL-2
45/02	WL-2

K锉		Safesiders锉		HERO Shaper锉
号码/锥度	长度/mm	号码/锥度	长度/mm	号码/锥度	长度/mm
20/02	WL	20/02	WL	20/06	冠方2/3
25/02	WL	20/04	WL	25/04	WL
30/02	WL	25/02	WL	30/04	WL
35/02	WL-1	30/02	WL
40/02	WL-2	25/08	WL-2
45/02	WL-2

组别	例数	根管弯曲度（°）
K锉组	20	32.2±9.9
Safesiders锉组	20	32.1±8.7
HERO Shaper锉组	20	31.7±9.1

组别	例数	根管弯曲度（°）
K锉组	20	32.2±9.9
Safesiders锉组	20	32.1±8.7
HERO Shaper锉组	20	31.7±9.1

组别	观测点至根尖孔距离
组别	1 mm	2 mm	3 mm	4 mm	5 mm	6 mm	7 mm
K锉组	0.23±0.06^a	0.27±0.08^a	0.31±0.09^a	0.47±0.16^a	0.45±0.08^a	0.34±0.12^a	0.27±0.13^a
Safesiders锉组	0.14±0.04	0.16±0.06	0.19±0.05^b	0.28±0.05^b	0.25±0.08	0.18±0.05	0.18±0.07
HERO Shaper锉组	0.13±0.05	0.14±0.04	0.14±0.04	0.20±0.03	0.21±0.06	0.15±0.07	0.13±0.06

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