Influence of Root Canal Taper on Its Cleanliness: A Scanning Electron Microscopic Study

Arvaniti, Ioanna S.; Khabbaz, Marouan G.

doi:10.1016/j.joen.2011.02.025

Cited by 48 publications

(49 citation statements)

References 17 publications

(20 reference statements)

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“…The results of this investigation are not surprising and are in agreement with those of previous studies, which confirm that the cleaning efficiency decreases when approaching the WL within the apical third for all the investigated systems (13)(14)(15). Thus, differences between the apical third and the two coronal thirds shown in previous studies can be observed within the apical third.…”

Section: Discussionsupporting

confidence: 92%

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

Robberecht¹,

Dehurtevent²,

Lemaitre³

et al. 2017

Eur Endod J

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Objective: The aim of this study was to evaluate the influence of root canal curvature (curved and straight root canals), prepared using reciprocating and rotary files, on wall cleanliness during root canal treatments. Methods: Thirty curved and 30 straight human root canals were prepared using ProTaper (Dentsply), ProTaper Next (Dentsply) and Reciproc files (Dentsply) (n=20/group). The roots were split longitudinally and observed using a scanning electron microscope. Six micrographs were obtained at 1, 3 and 5 mm from the working length (WL). Two blinded observers scored the amount of debris. Mean debris scores were compared using a non-parametric the Mann-Whitney U test or Kruskal-Wallis test, and a Bonferroni correction was used for multiple comparisons. Results: Considering all the shaping systems together, the debris scores were lower in curved root canals (P<0.05). Reciproc and ProTaper Next performed better than ProTaper in straight canals (P<0.05). No difference was found between ProTaper Next and Reciproc regardless of the canal curvature or distance from the WL. Considering all the shaping systems together, cleanliness increased when pulling away from the WL. Conclusion:The anatomical configuration of the root canal influences the quality of cleaning by shaping instruments regardless of the instrument kinematics during endodontic procedures. In every circumstance, the last millimetres of the apical third remain the most difficult area to clean.

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Section: Discussionsupporting

confidence: 92%

“…Although this parameter has been independently evaluated in straight and curved canals, no data on the influence of the canal curvature on cleanliness with different instrumental motions are available (13,14).…”

Section: Highlightsmentioning

confidence: 99%

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

Robberecht¹,

Dehurtevent²,

Lemaitre³

et al. 2017

Eur Endod J

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“…Afterwards, roots were split longitudinally with a diamond disk in a buccolingual direction. The presence of smear layer was evaluated by scanning electron microscopy (Quanta TM 3D DualBeamTM Hilsboro, Oregon, USA) at 1000× magnification using a 4-cathegory scoring system as follows: score 1, smear layer covering 0-25% of the examined surface; score 2, smear layer covering 25-50% of the examined surface; score 3, smear layer covering 50-75% of the examined surface; and score 4, smear layer covering 75-100% of the examined surface (21).…”

Section: Methodsmentioning

confidence: 99%

“…The scoring procedure was performed by 3 examiners and was double-blinded. First, the apical end of preparation was found at low magnification, and then every millimeter of the apical (0-3 mm), middle (4-6 mm) and coronal (7-9mm) thirds of the root canal walls were scanned at 1000X magnification and scored (21).…”

Section: Methodsmentioning

confidence: 99%

Effectiveness of a Canal Brush on Removing Smear Layer: A Scanning Electron Microscopic Study

et al. 2013

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This study evaluated the effectiveness of a highly flexible endodontic brush made of polypropylene canal brush (CanalBrush; Coltène) on smear layer removal from the canal walls when used according to the manufacturer's recommendations. Forty-four single-rooted mandibular incisors were prepared to apical size 30/0.06 and randomly divided into three groups A, B and C, where the final irrigation regimen was 10 mL 17% EDTA and 10 mL 2.5% NaOCl for group A, 10 mL EDTA, 5 mL NaOCl, CanalBrush for 20 s at 450 rpm and 5 mL NaOCl for group B, 10 mL NaOCl, CanalBrush and 10 mL NaOCl for group C. One medium-sized CanalBrush was used for each root canal and all brushes were examined under the optical microscope after application to evaluate bristle deformation. Afterwards, roots were split longitudinally and the presence of smear layer was evaluated under a scanning electron microscope. Used brushes invariably exhibited bristle deformation. Group C exhibited the highest means of smear layer in all thirds. Comparing the apical thirds in all groups, there was no statistical difference between groups A and B (3.64±0.48 and 3.68±0.62 respectively), while group C exhibited significantly higher scores (3.9±0.28) than the other two groups. In conclusion, the CanalBrush proved unable to remove smear layer from the instrumented root canals, when used according to the manufacturers' instructions.

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“…[3] Microorganisms present in the pulp chamber and in the coronal portion of the root canal can be easily removed by irrigation solutions at the beginning of endodontic therapy; however, pathogens remaining in hidden areas of the root canal may still lead to apical periodontitis. [1225] Only after root canal preparation can these bacteria be eradicated. [1225]…”

Section: Discussionmentioning

confidence: 99%

Cleaning capacity of hybrid instrumentation technique using reamer with alternating cutting edges system files: Histological analysis

et al. 2014

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Aim:The aim of the following study is to evaluate the cleaning capacity of a hybrid instrumentation technique using Reamer with Alternating Cutting Edges (RaCe) system files in the apical third of mesial roots of mandibular molars.Materials and Methods:Twenty teeth were selected and separated into two groups (n = 20) according to instrumentation technique as follows: BioRaCe - chemomechanical preparation with K-type files #10 and #15; and files BioRaCe BR0, BR1, BR2, BR3, and BR4; HybTec - hybrid instrumentation technique with K-type files #10 and #15 in the working length, #20 at 2 mm, #25 at 3 mm, cervical preparation with Largo burs #1 and #2; apical preparation with K-type files #15, #20, and #25 and RaCe files #25.04 and #30.04. The root canals were irrigated with 1 ml of 2.5% sodium hypochlorite at each change of instrument. The specimens were histologically processed and photographed under light optical microscope. The images were inserted onto an integration grid to count the amount of debris present in the root canal.Results:BioRaCe presented the highest percentage of debris in the apical third, however, with no statistically significant difference for HybTec (P > 0.05).Conclusions:The hybrid technique presented similar cleaning capacity as the technique recommended by the manufacturer.

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Influence of Root Canal Taper on Its Cleanliness: A Scanning Electron Microscopic Study

Cited by 48 publications

References 17 publications

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

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

Effectiveness of a Canal Brush on Removing Smear Layer: A Scanning Electron Microscopic Study

Cleaning capacity of hybrid instrumentation technique using reamer with alternating cutting edges system files: Histological analysis

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