Influence of Root Canal Curvature on Wall Cleanliness in the Apical Third during Canal Preparation

Robberecht, Lieven; Dehurtevent, Marion; Lemaitre, Gaetan; Behal, Hélène; Hornez, Jean‐Christophe; Claisse-Crinquette, Anne

doi:10.5152/eej.2017.16035

Cited by 11 publications

(19 citation statements)

References 30 publications

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“…The results of these studies pointed to a rather equable but somewhat lower average value of the smear layer in the apical part of the canal after the application of the UNICONE file. Primarily, this could be explained by the design of the working part of the instrument and by the fact that larger spaces between the blades in the instruments with reciprocating movements allow more efficient elimination of the dentin debris [2,5,21]. These findings coincide with the results of the research where the efficiency of cleaning of two systems with a single file, one with full rotation and one with reciprocating movements, was examined [3,23].…”

Section: Discussionsupporting

confidence: 62%

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The efficiency of canal cleaning with reciprocating movements instruments - SEM study

et al. 2020

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Introduction/Objective The application of nickel-titanium (NiTi) instruments in cleaning and shaping of the root canal system is a standard and a precondition for the success of endodontic treatment. The objective of this study was to use scanning electron microscopy (SEM) analysis in order to examine the efficiency of cleaning the apical third of the root canal system using two different NiTi systems with reciprocating movements. Methods The study included 20 single-rooted teeth (premolars) divided into two groups. In group 1, the canal preparation was realized with a single file UNICONE with reciprocating movements (MEDIN, Inc., Nové Město na Moravě, Czech Republic), and in group 2, with а RECIPROC BLUE instrument with reciprocating movements (VDW GmbH, Munich, Germany). The same quantities of 2% NaOCl solution and 17% EDTA solution were used as irrigation solutions. The samples prepared for SEM analysis of the smear layer in the apical third were evaluated on a scale of 1-5 and at a magnification of 1,000×. Results SEM analysis pointed to mostly clean canal walls in the apical segment in both tested groups. Slightly cleaner walls were observed after the application of the UNICONE file (78%) compared to the samples of the second group, where the instrumentation was realized by the RECIPROC BLUE file (76%), but without statistically significant differences. Conclusion Single-file reciprocating systems do not remove the smear layer completely, but provide efficient cleaning of the apical region of the canal.

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Section: Discussionsupporting

confidence: 62%

“…In the literature, there are few studies that examined the efficiency of the files with reciprocating movements in removing the smear layer [3,14,21,22,23]. The results indicate that these files have similar cleaning effects to instruments with full rotation and cannot provide complete cleaning of the canal system [2,3,21,23].…”

Section: Discussionmentioning

confidence: 99%

The efficiency of canal cleaning with reciprocating movements instruments - SEM study

et al. 2020

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“…Clean root canal without smear layer is one of the basic preconditions for achieving successful endodontic treatment [12,16,17]. The fact is that effective cleaning of the canal system is hardly feasible, especially in the apical third, due to inaccessibility, small diameter of the canal where the amount, concentration and time of exposure of this part of the canal to irrigation solutions is limited [12,16,17,20,21,22].…”

Section: Discussionmentioning

confidence: 99%

“…Slightly cleaner canal and smaller amount of smear layer in the apical third using the file with reciprocating movements could be explained by design of the working part of the instrument, and its cutting efficiency with increased agitation of the irrigation solution [9,16,17]. However, the influence of the file motion dynamics in a small number of realized studies has not been confirmed [20,23,24]. There are few studies in the literature that examined the efficacy of reciprocating files regarding the removal of the smear layer from the canal walls [12,16,17].…”

Section: Discussionmentioning

confidence: 99%

“…Čist kanal korena bez razmaznog sloja je jedan od osnovnih preduslova za uspeh endodontskog lečenja [12,16,17]. Činjenica je da je efikasno čišćenje kanalskog sistema teško ostvarivo i da je problem apikalne trećine, zbog nepristupačnosti, neadekvatnog dijametra apeksne preparacije, odnosno količine, koncentracije i vremena izlaganja ovog dela kanala rastvorima za irigaciju, dodatno otežan [12,16,17,20,21,22].…”

Section: Diskusijaunclassified

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Efficiency of root canal cleaning using a single instrument with reciprocating motion systems and full rotation systems: a SEM study

Živković¹,

Nešković²,

Jovanovic-Medojevic³

et al. 2018

Serbian Dental Journal

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Summary Introduction Efficient cleaning and canal design present a basic precondition for successful endodontic treatment. The aim of this study was to evaluate, using SEM analysis, the efficacy of cleaning the apical third of the canal with one instrument in both reciprocating motion and full rotation systems. Materials and methods Thirty (30) single-rooted teeth (upper incisors), extracted due to periodontal reasons, were used and selected in 2 groups. In the group 1, instrumentation was done with a single instrument UNICONE with reciprocal movements (MEDIN, Czech Republic), while in the group 2, a single instrument XPS endo SHAPER (XPS) (FKG, Dentaire, Swiss) with full rotation was used. 2% solution of NaOCl and 17% EDTA solution were used as irrigation agents in both groups. SEM analysis of smear layer in the apical third was done at standard magnification of 1000x and presented on a scale of 1-5. Results showed mostly clean canal walls and no smear layer in the apical region in both tested groups. Canal walls were somewhat cleaner after using UNICONE with reciprocal movements (80%) compared to the canals instrumented with XPS ENDO SHAPER (76%), but this difference was not statistically significant. Conclusion Single-file NiTi systems did not remove smear layer completely, but provided efficient cleaning in the apical part of the canal. UNICONE file with reciprocal movements was somewhat more efficient in removing smear layer compared to the full rotation XPS ENDO SHAPER file.

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Effectiveness of conservative instrumentation in root canal disinfection

et al. 2023

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Objectives The impact of conservative instrumentation on the disinfection of root canals with different curvatures has not yet been determined. This ex vivo study aimed to evaluate and compare the effect of conservative instrumentation with TruNatomy (TN) and Rotate and a conventional rotary system, ProTaper Gold (PTG), on root canal disinfection during chemomechanical preparation of straight and curved canals. Materials and methods Ninety mandibular molars with straight (n = 45) and curved (n = 45) mesiobuccal root canals were contaminated with polymicrobial clinical samples. Teeth were divided into three subgroups (n = 14) according to the file systems and the curvature. Canals were instrumented with TN, Rotate, and PTG, respectively. Sodium hypochlorite and EDTA were used as irrigants. Intracanal samples were taken before (S1) and after (S2) instrumentation. Six uninfected teeth were used as negative controls. The bacterial reduction between S1 and S2 was measured by ATP assay, flow cytometry, and culture methods. Kruskal–Wallis and ANOVA tests were followed by the Duncan post hoc test (p < 0.05). Results Bacterial reduction percentages were similar for the three file systems in straight canals (p > 0.05). However, PTG showed a lower reduction percentage of intact membrane cells in flow cytometry than TN and Rotate (p = 0.036). For the curved canals, no significant differences were obtained (p > 0.05). Conclusion Conservative instrumentation of straight and curved canals using TN and Rotate files resulted in similar bacterial reduction compared to PTG. Clinical relevance The disinfection efficacy of conservative instrumentation is similar to conventional instrumentation in straight and curved root canals.

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Influence of Root Canal Curvature on Wall Cleanliness in the Apical Third during Canal Preparation

Cited by 11 publications

References 30 publications

The efficiency of canal cleaning with reciprocating movements instruments - SEM study

The efficiency of canal cleaning with reciprocating movements instruments - SEM study

Efficiency of root canal cleaning using a single instrument with reciprocating motion systems and full rotation systems: a SEM study

Effectiveness of conservative instrumentation in root canal disinfection

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