Clinical microscopic analysis of protaper retreatment system efficacy considering root canal thirds using three endodontic sealers

Só, Marcus Vinícius Reis; Figueiredo, José Antônio Poli de; Fachin, Elaine Vianna Freitas; Duarte, Marco Antônio Húngaro; Pereira, Jefferson Ricardo; Kuga, Milton Carlos; Rosa, Ricardo Abreu da

doi:10.1002/jemt.22054

Cited by 8 publications

(12 citation statements)

References 23 publications

(40 reference statements)

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“…The absence of sealer penetration in endodontic retreatment cases may be justified by the presence of the sealer in the primary endodontic treatment. According to Só et al (), ProTaper Retreatment system were not capable of completely remove gutta‐percha and endodontic sealer from palatine canals of maxillary molars. These results are similar with the findings of Duarte et al ().…”

Section: Discussionmentioning

confidence: 99%

Penetrability of AH plus and MTA fillapex after endodontic treatment and retreatment: A confocal laser scanning microscopy study

Kok¹,

Rosa

Barreto

et al. 2014

Microscopy Res & Technique

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The aim of the study was to assess the penetrability of two endodontic sealers (AH Plus and MTA Fillapex) into dentinal tubules, submitted to endodontic treatment and subsequently to endodontic retreatment. Thirty ex vivo incisors were prepared using ProTaper rotary system up to F3 instrument and divided in three groups according to the endodontic sealer used for root canal filling: AH Plus (AHP), MTA Fillapex (MTAF), and control group (CG) without using EDTA previously to the root canal filling. Rhodamine B dye (red) was incorporated to the sealers in order to provide the fluorescence which will enable confocal laser scanning microscopy (CLSM) assessment. All specimens were filled with gutta-percha cones using the lateral compaction technique. The specimens were submitted to endodontic retreatment using ProTaper Retreatment system, re-prepared up to F5 instruments and filled with gutta-percha cones and the same sealer used during endodontic retreatment. Fluorescein dye (green) was incorporated to the sealer in order to distinguish from the first filling. The roots were sectioned 2 mm from the apex and assessed by CLSM. No difference was found between the two experimental groups (P > 0.05). On the other hand, in the control group the sealers were not capable to penetrate into dentinal tubules after endodontic treatment (P > 0.05). In retreatment cases, none of the sealers were able to penetrate into dentin tubules. It can be concluded that sealer penetrability is high during endodontic treatment. However, MTA Fillapex and AH Plus do not penetrate into dentinal tubules after endodontic retreatment.

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Section: Discussionmentioning

confidence: 99%

Penetrability of AH plus and MTA fillapex after endodontic treatment and retreatment: A confocal laser scanning microscopy study

Kok¹,

Rosa

Barreto

et al. 2014

Microscopy Res & Technique

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“…After the aging interval, root canal retreatment was performed with ProTaper Universal Retreatment (DentsplyMaillefer, Ballaigues, Switzerland) instruments at 500 rpm and 3 N/cm torque (8). The D1 ProTaper file (size 30, 0.09 taper) was used for the removal of the coronal third of the root canal filling, followed by the use of the D2 ProTaper instrument (size 25, 0.08 taper) for the middle third of the root canal.…”

Section: Retreatment Techniquementioning

confidence: 99%

“…Nevertheless, root filling removal from root canal irregularities, such as oval extensions, isthmuses and apical deltas, is a major concern due to inaccessibility of instruments and chemical irrigants (3). In an attempt to address this challenge, the additional enlargement of the root canal with extra NiTi rotary files has been proposed (4), but root canals that are completely free of filling residues have remained unattainable (4)(5)(6)(7)(8).…”

Section: Introductionmentioning

confidence: 99%

Efficacy of an Organic Solvent and Ultrasound for Filling Material Removal

et al. 2013

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The aim of this study was to investigate whether a final rinse with Endosolv R ® solvent and ultrasound resulted in cleaner root canal walls during endodontic retreatment. A total of 56 extracted premolar teeth were manually instrumented using a step-back flare technique and filled with gutta-percha and AH Plus sealer. After 9 months, the canals were retreated by removing the gutta-percha and sealer with ProTaper Universal Retreatment and rotary preparation with ProTaper Universal System up to an F5 file. As a final step, the teeth were randomly divided in 4 groups (n=14) and were subjected to passive ultrasonic irrigation (PUI) with either Endosolv R or distilled water. In the control groups, the irrigants were left undisturbed. Roots were cleaved and examined under scanning electron microscopy (SEM), and the amount of filling remnants on the canal walls was assessed by two calibrated examiners in a blinded fashion. Data were analyzed by the Kruskal-Wallis test and the Student-Newman-Keuls post hoc test (α=0.05). All groups presented filling debris in the three root canal thirds after retreatment. There were no significant differences between the groups or among the root canal thirds within each group (p>0.05). PUI with Endosolv R was not effective in the removal of filling debris from root canal walls.

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“…In G1 (lateral compaction and xylol), D1, D2, and D3 instruments (ProTaper Universal Retreatment, Dentsply Maillefer, Ballaigues, Switzerland) were used sequentially, in crown-down direction, until the apical working length previously established, as described by Só et al 5 At each instrument change, 0.1 mL of xylol (Synth, Diadema, São Paulo, Brazil) was introduced in the root canal. In G2 (lateral compaction and Endosolv-R), the sequence was similar to G1, but by using Endosolv-R (Septodont, Saint-Maur-des-Fossés, Cedex, France) as organic solvent.…”

Section: Methodsmentioning

confidence: 99%

“…3,4 New technological resources have been recommended to optimize the surgical procedures and to facilitate the root canal cleaning. 5 Despite the rotary instruments facilitate the gutta-percha removal, these instruments do not eliminate the gutta-percha completely. 1,6 Therefore, rotary instruments associated with organic solvents have been indicated to improve the residues removal.…”

Section: Introductionmentioning

confidence: 99%

Persistence of Residues after Endodontic Retreatment related to the Obturation Technique and to the Solvent

Bandéca¹,

Kuga²,

Jordão-Basso³

et al. 2017

World Journal of Dentistry

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Objective: To quantify the persistence of residues after endo dontic retreatment related to the root canal obturation technique (lateral compaction or single cone) previously performed and the solvent used (xylol or EndosolvR) in the cervical and root apical segment using digital radiograph. Materials and methods:Forty root canals were prepared using the F2 instrument and filled with gutta-percha and AH Plus, 20 canals using #25 point by lateral compaction and the other 20 using F2 point by single cone. The root canals were transversely sectioned, and two segments (cervical and apical) were obtained. Radiographs were taken from the segment in buccolingual and mesiodistal direction, as well as the area that was originally filled with the root canal obturation was measured using ImageJ. After the specimens were set on special devices, the obturations were removed using the rotary system and divided into four groups (n = 10): G1 -lateral compaction and xylol; G2 -lateral compaction and EndosolvR; G3 -single cone and xylol; and G4 -single cone and Endosolv-R. A new radiograph was taken and the area occupied by residues was measured. The persistence of residues was obtained from the obturation remaining in the root canal in percentage. The data were analyzed using Kruskal-Wallis test (p = 0.05).Results: There was no difference among the examined groups, regardless of the radicular segment or the radiograph direction (p > 0.05). Conclusion:The endodontic retreatment using xylol or EndosolvR in the obturations previously performed by lateral compaction or single cone technique presented similar persis tence of residues in the root canal, regardless of the radicular segment.

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Clinical microscopic analysis of protaper retreatment system efficacy considering root canal thirds using three endodontic sealers

Cited by 8 publications

References 23 publications

Penetrability of AH plus and MTA fillapex after endodontic treatment and retreatment: A confocal laser scanning microscopy study

Penetrability of AH plus and MTA fillapex after endodontic treatment and retreatment: A confocal laser scanning microscopy study

Efficacy of an Organic Solvent and Ultrasound for Filling Material Removal

Persistence of Residues after Endodontic Retreatment related to the Obturation Technique and to the Solvent

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