+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Performance of RaCe instrumentation system in curved root canals: a comprehensive analysis by three study methods



Performance of RaCe instrumentation system in curved root canals: a comprehensive analysis by three study methods



Brazilian Dental Journal 24(3): 230-234



In this study, curved maxillary molar root canals were instrumented with RaCe rotary system to evaluate: 1. the occurrence of canal transportation using a radiographic platform; 2. the action of the instruments on the dentin walls, centering ability and canal enlargement by analysis of digital images; and the percentage of regular dentin surfaces and debris within the canal by histological analysis. Ten mesiobuccal roots of extracted human maxillary molars were embedded in acrylic resin and sectioned at the middle and apical thirds. Root canal shaping was performed using the RaCe rotary system at 250 rpm and 1 Ncm torque. Each instrument set was used five times according to a crown-down technique in the following sequence: 40/0.10, 35/0.08, 25/0.06, 25/0.04, 25/0.02 (working length - WL), 30/0.02 (WL) and 35/0.02 (WL). Each instrument was inserted until resistance was felt and then pulled back, followed by brushing movements towards all canal walls. Each specimen was assessed by three study methods: radiographic platform, digitized image assessment and histological analysis. The radiographic platform showed lack of apical transportation. No statistically significant difference (Wilcoxon test, p>0.05) was found between the middle and apical thirds regarding instrument action on dentin walls, centering ability, area of root canal enlargement, percentage of regular dentin surfaces and debris within the root canal. It may be concluded that RaCe system is a suitable method for the preparation of curved root canals, regarding the maintenance of root canal original path, action on dentin walls, canal enlargement and removal of debris from the root canal lumen.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 054926432

Download citation: RISBibTeXText

PMID: 23969911

DOI: 10.1590/0103-6440201301920


Related references

Instrumentation of curved root canals: a comparison study. Journal of Endodontics 18(9): 448-450, 1992

Comparative study of 6 rotary nickel-titanium systems and hand instrumentation for root canal preparation in severely curved root canals of extracted teeth. Journal of Endodontics 39(2): 278-282, 2014

Experimental study of preparation errors during instrumentation of artificial curved root canals with stainless steel K files. Shanghai Kou Qiang Yi Xue 16(3): 328-332, 2007

3D analysis of D-RaCe and self-adjusting file in removing filling materials from curved root canals instrumented and filled with different techniques. Thescientificworldjournal 2014: 836513, 2015

Cleaning efficacy using two engine-driven systems versus manual instrumentation in curved root canals: a scanning electron microscopic study. Journal of Endodontics 37(9): 1279-1282, 2011

Comparison of hand and rotary instrumentation for removing gutta-percha from previously treated curved root canals: a microcomputed tomography study. International Endodontic Journal 47(2): 173-182, 2015

Shock of paradigms on the instrumentation of curved root canals. Brazilian Dental Journal 17(1): 3-5, 2006

The effect of endosonic instrumentation in simulated curved root canals. Journal of Endodontics 13(5): 215-219, 1987

Instrumentation of curved molar root canals with the Roane technique. Journal of Endodontics 13(10): 479-489, 1987

Scanning electron microscopic study of the quality of root canal preparations using conventional hand instrumentation and an experimental ultrasonic instrument in both straight and curved canals. Journal of Dental Research 65(SPEC ISSUE): 253, 1986

Comparison of three instrumentation techniques in the preparation of simulated curved root canals. International Endodontic Journal 29(5): 315-319, 1996

Histological evaluation of ultrasonic and sonic instrumentation of curved root canals. Journal of Endodontics 15(2): 49-59, 1989

An in vitro comparison of the Excalibur handpiece and hand instrumentation in curved root canals. Journal of Endodontics 22(3): 131-134, 1996

Comparison of mechanical and standard hand instrumentation techniques in curved root canals. Journal of Endodontics 16(5): 230-234, 1990

Root canal instruments for manual use: cutting efficiency and instrumentation of curved canals. International Endodontic Journal 28(2): 68-76, 1995