Assessment of canal walls after biomechanical preparation of root canals instrumented with protaper universalTM rotary system

Aguiar, Carlos; Mendes, Daniela de Andrade; Câmara, Andréa Cruz; Figueiredo, Antonio Poli de

doi:10.1590/s1678-77572009000600010

Cited by 16 publications

(21 citation statements)

References 35 publications

(66 reference statements)

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“…A new design feature of ProTaper Universal™ system comprises the more rounded tips of the finishing files with the aim to increase the working safety as well as to improve shaping ability. Furthermore, the cross‐section design has been modified to increase its inherent flexibility (11), cutting and efficiency with low proportion of apical deviation as demonstrated in the present investigation and in previous studies (6,10). These findings are in contrast to a previous study (9) in which the ProTaper Universal™ showed a greater tendency to produce apical transportation.…”

Section: Discussionmentioning

confidence: 58%

“…The ProTaper Universal™ rotary system represents an advancement of the ProTaper™ rotary system (6,10,11), which has been previously investigated in several studies (5,12–15). The basic sequence of the ProTaper Universal™ exhibits an advanced flute design that combines multiple tapers within the shaft, a convex triangular cross‐sectional design, blades close to the non‐cutting pilot tip as well as an increasing chip space (space for the accumulation of debris) from tip to shaft.…”

Section: Discussionmentioning

confidence: 99%

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Comparison of the centring ability of the ProTaper™ and ProTaper Universal™ rotary systems for preparing curved root canals

et al. 2010

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The aim of this in vitro study was to compare the centring ability of the ProTaper™ and ProTaper Universal™ rotary systems for preparing curved root canals, by means of preoperative and postoperative imaging of a cross-section of their coronal, middle and apical thirds. Twenty mesiobuccal root canals of human mandibular first molars with a degree of curvature ranging from 55° to 60° were randomly divided into two groups of 10 specimens each: Group 1, ProTaper™ rotary system; and Group 2, ProTaper Universal™ rotary system. The data were analysed statistically by Kruskal-Wallis and Student's t-test at the 5% significance level. The results showed that the differences between the percentages of the presence of deviation observed were not statistically significant. Both systems showed the capacity for producing centred preparations in curved root canals with low proportions of deviation.

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Section: Discussionmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Comparison of the centring ability of the ProTaper™ and ProTaper Universal™ rotary systems for preparing curved root canals

et al. 2010

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“…The apical region of infected canals, however, contains numerous microorganisms that mechanical instrumentation with a Fl file cannot fully eliminate 1,3 . The apical enlargement to sizes larger than #25 permits more efficient irrigation 4 , which is essential to reducing microbial contamination during endodontic therapy.…”

Section: Discussionmentioning

confidence: 99%

Apical transportation associated with ProTaper® Universal F1, F2 and F3 instruments in curved canals prepared by undergraduate students

et al. 2014

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Objective This study evaluated apical transportation associated with ProTaper® Universal Fl, F2 and F3 rotary files in curved canais prepared by undergraduate students. Material and Methods Twenty mesial roots of mandibular molars with curvatures ranging between 25° and 35° were selected. Mesiobuccal canals were instrumented by twenty students with the ProTaper® system (Dentsply-Maillefer, Ballaigues, Switzerland) according to the manufacturer's instructions. Pre-fiaring was performed with Sl and SX files. A #15 K-file was inserted into the root canal up to the working length (WL), and an initial digital radiograph was taken in a buccolingual direction (baseline). Afterwards, the S1, S2, F1, F2, and F3 files were employed up to the WL. Other radiographies were taken in the same orientation of the baseline after the use of the Fl, F2, and F3 files, with each file inserted into the root canal. The radiographic images were overlapped, and the Image J software was used to measure the distance between the rotary files' ends and the #15 K-file's end, characterizing the apical transportation. Data were analyzed by Repeated Measure ANOVA and by the SNK post hoc test (P<0.05). Results It was verified that file size affected apical transportation significantly (P<0.001). The F3 file showed higher apical transportation than Fl and F2, while between these last files there was no difference. Conclusion The undergraduate students produced lower apical transportation in curved canals when they did not use the F3 rotary file.

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“…The main advantages of this widely-used method are the possibility to compare the root canal structure before and after instrumentation, and the fact that the analyzes are conducted in the real image of the root canal. 10,11,20,21,24 However, disadvantages have also been described, e.g., assessment restricted to limited portions of the root canal, insofar as this is a two-dimensional technique, and material may be lost from serial tooth sectioning. Moreover, it is an invasive method, with irreversible changes to specimens.…”

Section: Discussionmentioning

confidence: 99%

Assessing apical transportation in curved canals: comparison between cross-sections and micro-computed tomography

et al. 2012

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Assessing apical transportation in curved canals: comparison between cross-sections and micro-computed tomography Abstract: The aim of this study was to compare two methods of assessing apical transportation in curved canals after rotary instrumentation, namely, cross-sections and micro-computed tomography (µCT). Thirty mandibular molars were divided into two groups and prepared according to the requirements of each method. In G1 (cross-sections), teeth were embedded in resin blocks and sectioned at 2.0, 3.5, and 5.0 mm from the anatomic apex. Pre-and postoperative sections were photographed and analyzed. In G2 (µCT), teeth were embedded in a rubber-base impression material and scanned before and after instrumentation. Mesiobuccal canals were instrumented with the Twisted File (TF) system (SybronEndo, Orange, USA), and mesiolingual canals, with the EndoSequence (ES) system (Brasseler, Savannah, USA). Images were reconstructed, and sections corresponding to distances 2.0, 3.5, and 5.0 mm from the anatomic apex were selected for comparison. Data were analyzed using Mann-Whitney's test at a 5% significance level. The TF and ES instruments produced little deviation from the root canal center, with no statistical difference between them (P > 0.05). The canal transportation results were significantly lower (0.056 mm) in G2 than in G1 (0.089 mm) (p = 0.0012). The µCT method was superior to the cross-section method, especially in view of its ability to preserve specimens and provide results that are more closely related to clinical situations.

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Assessment of canal walls after biomechanical preparation of root canals instrumented with protaper universalTM rotary system

Cited by 16 publications

References 35 publications

Comparison of the centring ability of the ProTaper™ and ProTaper Universal™ rotary systems for preparing curved root canals

Comparison of the centring ability of the ProTaper™ and ProTaper Universal™ rotary systems for preparing curved root canals

Apical transportation associated with ProTaper® Universal F1, F2 and F3 instruments in curved canals prepared by undergraduate students

Assessing apical transportation in curved canals: comparison between cross-sections and micro-computed tomography

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