Comparison of Two Rotary Systems in Root Canal Preparation Regarding Disinfection

Machado, Manoel Eduardo de Lima; Sapia, Luiz Antônio Bichels; Cai, Silvana; Martins, Guilherme Henrique Rosa; Nabeshima, Cleber Keiti

doi:10.1016/j.joen.2010.03.012

Cited by 56 publications

(64 citation statements)

References 28 publications

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“…The specimens were instrumented according to Machado et al 9 : the cervical and middle thirds were prepared with Gates Glidden 1, 2 and 3 drills (Dentsply Maillefer,) and ProTaper (Dentsply Maillefer) SX and S2 files at 500 rpm and torque of 4 Ncm (X-Smart; Dentsply Maillefer). The working length was determined using a size 15 K-file introduced to less than 1 mm from the foramen.…”

Section: Methodsmentioning

confidence: 99%

“…This obturation technique does not need the introduction of many accessory cones 2 , reduces the operating time 8 , is easy to perform, and does not require special equipment. However, it has been observed that shaping with ProTaper rotary system allows the use of a 0.06 master cone and an apical diameter larger than the last instrument, characterizing this as a modified single-cone technique 9 . Comparisons of the amount of filling material between the original ProTaper single-cone and modified single-cone showed a greater percentage of gutta-percha in relation to sealer when utilizing the modified technique 10 .…”

Section: Introductionmentioning

confidence: 99%

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Comparison of three obturation techniques with regard to bacterial leakage

Nabeshima¹,

Martins²,

Leonardo³

et al. 2013

Braz. J. Oral Sci.

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Aim: To compare bacterial leakage in root canals obturated with the modified single-cone, lateral condensation, and continuous wave of condensation techniques. Methods: Distobuccal root canals of maxillary molars were shaped up to ProTaper F2 and obturated with modified singlecone, lateral condensation or continuous wave of condensation technique. Two-chamber bacterial model using Enterococcus faecalis was employed for bacterial leakage evaluation for 30 days. The chi-square test was applied to evaluate differences between turbid and non-turbid samples, and the Kruskal-Wallis test was used for evaluating the time necessary for microleakage. A significance level of 5% was set for all analyses. Results: The modified single-cone technique showed leakage in 73.3% of samples, lateral condensation in 66.6%, and continuous wave of condensation in 53.3%, but there were no significant differences among the groups (p>0.05). Conclusions: It can be concluded that the modified single-cone technique shows similar sealing efficacy to that of lateral condensation and continuous wave of condensation technique.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of three obturation techniques with regard to bacterial leakage

Nabeshima¹,

Martins²,

Leonardo³

et al. 2013

Braz. J. Oral Sci.

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“…Canals were instrumented by a single operator and the teeth were randomly divided into 2 groups G1 (n=10): manual instrumentation using Kerr-type files (Les Fils D'Auguste Maillefer) according to the crown-down technique; in the mesial or buccal canals, files sizes 30 and 25 were used to prepare the cervical third and sizes 20 and 15 to prepare the middle and apical thirds; in the distal or palatal canal, files sizes 45 and 40 were used in cervical third and sizes 30 and 25 in the middle and apical thirds (17). G2 (n=10): rotary instrumentation using the ProTaper system activated by the rotary engine-driven motor X-Smart (LesFils D'Auguste Maillefer) [files S1 and S2 (300 rpm and 3 N torque) and files F1 and F2 (300 rpm and 2 N torque)] (17,18). In all groups, the canals were debrided respecting the safety zone areas of the root.…”

Section: Sample Selectionmentioning

confidence: 99%

Manual and Rotary Instrumentation Ability to Reduce Enterococcus faecalis Associated with Photodynamic Therapy in Deciduous Molars

et al. 2014

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This aim of this study was to assess the ability of manual or rotary instrumentation associated with photodynamic therapy (PDT) to reduce Enterococcus faecalis using three combinations of light/photosensitizers: toluidine blue O/laser, fuchsin/halogen light and fuchsin/LED. Twenty deciduous molars were selected and contaminated with Enterococcus faecalis (McFarland 0.5 scale). Working length determination was performed by visual method. The teeth were randomly divided into two groups: G1 (n=10): manual instrumentation (Kerr-type files) and G2 (n=10): rotary instrumentation (ProTaper system). The bacteria were collected three times using sterile paper cones compatible with the anatomic diameter of the root canal for 30 s before and after instrumentation and after PDT. The samples were diluted in peptone water, seeded on blood agar plates and incubated in an oven at 37 °C for colony-forming units counting. The decrease of E. faecalis counts after instrumentation and after PDT was compared using the Wilcoxon test, t-test and Kruskal Wallis test. A significant reduction of E. faecalis occurred after manual and rotary instrumentation and after PDT using the three combinations of light/ photosensitizer (p<0.05). It may be concluded that both rotary and manual instrumentation reduced E. faecalis. Fuchsin with halogen light or LED irradiation and toluidine blue O with laser irradiation can be used to reduce E. faecalis in root canals of primary molars. PDT can be used as an adjuvant to conventional endodontic treatment.

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“…Oprečna su mišljenja o promjeru apikalne preparacije kanala i kako on utječe na ishod dezinfekcije kanala (14) zato što manji promjer ostavlja u kanalu previše netaknutih dijelova (25). U ovom istraživanju pokazalo se da istrument Reciproc TM R40, iako ima veći promjer (40,06), nije bolje interkanalno dezinficirao od završne iglice ProTaper Universal TM F3 s manjim promjerom (30,09), uz irigaciju 1-postotnim natrijevim hipokloritom.…”

Section: Discussionunclassified

“…There are controversies about whether, in fact, the diameter of the apical preparation can significantly influence the outcomes of root canal disinfection (14), since smaller diameters provide a greater amount of untouched areas of the canal (25). In this study, despite the larger tip diameter presented by the Reciproc TM R40 (40.06) instrument compared to the ProTaper Universal TM F3 (30.09), allowing a slightly larger apical preparation, was not able to provide a superior intracanal disinfection when associated with 1% NaOCl.…”

Section: Zaključakmentioning

confidence: 99%