Effect of solvent on root canal filling material removal by two different rotary file systems in C‐shaped root canals

Abstract Objective To evaluate the apical transportation and centering ability promoted by reciprocating and continuous rotary systems after root canal filling removal. Materials and Methods After obturation, 40 mesial root canals of mandibular molars were distributed into four groups (n = 20) for filling material removal: PTU group–F2 instrument (25.08) of ProTaper Universal system; R25 group–R25 instrument (25.08) of Reciproc system; X2 group–X2 instrument (25.06) of ProTaper Next system and X3 group–X2 instrument (25.06) of ProTaper Next system, followed by X3 instrument (30.07). Cone-beam computed tomographic analysis was performed before and after filling material removal for acquisition of apical images. Apical transportation (AT) and its direction, and centering ability (CA), were assessed using the equations AT = (X1–X2)–(Y1–Y2) and CA = (X1–X2/Y1–Y2 or Y1–Y2/X1–X2), respectively. Data were submitted to the nonparametric Kruskal–Wallis and Dunn multiple comparison tests (p < 0.05) for statistical analysis. Results There was no statistically significant difference among groups for AT (p > 0.05), with a tendency toward transportation in the distal direction. Also, there was no statistically significant difference among groups regarding CA (p > 0.05). Conclusions The different systems, including ProTaper Next, caused AT within the acceptable clinical limit after filling removal. In addition, none of the tested systems presented adequate CA.

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Micro-CT analysis of dentinal microcracks on root canals filled with a bioceramic sealer and retreated with reciprocating instruments

Scientific Reports ◽

10.1038/s41598-020-71989-6 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Andressa Almeida ◽

Kaline Romeiro ◽

Marcely Cassimiro ◽

Luciana Gominho ◽

Eugênia Dantas ◽

...

Keyword(s):

Root Canal ◽

Material Removal ◽

Filling Material ◽

Micro Ct ◽

Root Canal Filling ◽

Root Canals ◽

Type Iv ◽

Ct Analysis ◽

Ah Plus ◽

Reciprocating Instruments

Abstract This study aimed to analyze the potential occurrence of dentinal defects after the removal of a root canal filling with two different sealers using Reciproc (RC) or Reciproc Blue (RB). The mesial roots of 60 mandibular molars with a Vertucci type IV configuration were selected. The samples were initially instrumented with Reciproc (R25) and then divided into the following four experimental groups according to the endodontic sealer and retreatment instrument (n = 15): BC Sealer/Reciproc (BCRC); BC Sealer/Reciproc Blue (BCRB); AH Plus/Reciproc (AHRC); and AH Plus/Reciproc Blue (AHRB). Then, the samples were scanned under micro-CT after obturation and removal of the filling material. Two analyses were conducted. First, an evaluation was performed on all the axial images, and another analysis evaluated each millimeter of the 10 mm from the apex. Dentinal defects were observed in all the samples. All of the identified defects in the images after filling material removal were present in the corresponding images after obturation. The use of AH Plus and EndoSequence BC Sealer, and filling material removal using RC and RB instruments did not induce dentinal defects.

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Comparative assessment of manual, rotary and reciprocating instruments for removal of root fillings, using stereomicroscope: An in vitro study

Bangladesh Medical Research Council Bulletin ◽

10.3329/bmrcb.v45i1.41809 ◽

2019 ◽

Vol 45 (1) ◽

pp. 54-61

Author(s):

Afzal Ali ◽

Sazid Hussain ◽

Sandeep Metgud ◽

Shashank Mishra ◽

Ankita Sharma ◽

...

Keyword(s):

Root Canal ◽

File Systems ◽

In Vitro Study ◽

Filling Material ◽

Root Canal Filling ◽

Root Canals ◽

Tukey Test ◽

Gutta Percha ◽

Reciprocating Instruments

Background: To investigate the efficiency of Hedstrom (H; Dentsply Maillefer) file, Protaper Universal Retreatment system (PTUR; Dentsply Maillefer), Mani NRT-GPR files (Mani, Japan) and WaveOne (WO; Dentsply Maillefer) Reciprocating files in removing Gutta Percha (GP) and sealer from root canals. Methods: Sixty canals with less than 10° curvature from extracted human maxillary incisors were used. Root canal reinstrumentation was performed with H, PTUR, Mani NRT-GPR and WO files. Amount of residual root filling material (Gutta-percha and or sealer) were measured by using stereomicroscope. Data of GP or sealer remnants were statistically analyzed using one-way analysis of variance and Tukey test. Results: There were no significant differences among 4 groups in terms of residual root filling material in the apical third (p > 0.05). H-file group showed highest amount of root residual root filling as compared to groups. Conclusions: Reciprocating file system proved to be more efficient in removing the root canal fillings material than other retreatment file systems. H file group showed highest amount of root canal filling material. Bangladesh Med Res Counc Bull 2019; 45: 54-61

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Effectiveness of different rotary file systems in removing the root canal filling material: A micro-computed tomography study

Journal of Dental Research Dental Clinics Dental Prospects ◽

10.34172/joddd.2021.045 ◽

2021 ◽

Vol 15 (4) ◽

pp. 273-278

Author(s):

Esin Özlek ◽

Hüseyin Gündüz

Keyword(s):

Computed Tomography ◽

Root Canal ◽

File System ◽

File Systems ◽

Filling Material ◽

Micro Ct ◽

Micro Computed Tomography ◽

Root Canal Filling ◽

Root Canals ◽

Time Required

Background. This study aimed to examine the retreatment efficiency of four NiTi rotary file systems with micro-computed tomography (micro-CT). Methods. Forty premolar teeth were shaped up to F2 using the ProTaper Universal rotary file system and obturated with MTA Fillapex. The root canals were scanned with micro-CT to evaluate the volume of root canal filling before retreatment. The samples were randomly divided into four groups according to the file system used to remove root canal filling material (n=10): ProTaper Universal Retreatment, ProTaper NEXT, EdgeFile XR, and EdgeFile® X3 NiTi system. All the samples were scanned with a micro-CT device for the second time to evaluate the amount of residual filling material in the root canals. The percentages of filling material removed from root canals were calculated. Additionally, the time spent on the removal of the root canal filling material was recorded. The data were analyzed using the Shapiro-Wilk and Kruskal-Wallis tests. Results. There were no significant differences between the groups in the percentage of root canal filling material removal. However, a statistically significant difference was found between the groups in the time required to reach the apex and remove the entire filling material. The time required to remove the root canal filling material was higher in the EdgeFile® X3 group. Conclusion. NiTi files manufactured for root canal preparation can be used effectively and safely to remove root canal filling materials. EdgeFile XR produced for retreatment can be used as an alternative to ProTaper Universal Retreatment files.

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Assessment of rotatory and reciprocating movements in root canal filling material removal

10.11606/t.25.2017.tde-26112021-105726 ◽

2017 ◽

Author(s):

Amanda Garcia Alves Maliza

Keyword(s):

Root Canal ◽

Material Removal ◽

Filling Material ◽

Root Canal Filling

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Effectiveness of ProTaper Retreatment System associated with Organic Solvents in the Removal of Root Canal Filling Material

World Journal of Dentistry ◽

10.5005/jp-journals-10015-1227 ◽

2013 ◽

Vol 4 (3) ◽

pp. 175-179

Author(s):

Renato de Toledo Leonardo ◽

Gisselle Moraima Chávez-Andrade ◽

Milton Carlos Kuga ◽

Flávia Angélica Guiotti ◽

Gisele Faria ◽

...

Keyword(s):

Organic Solvents ◽

Root Canal ◽

Filling Material ◽

Root Canal Filling ◽

Universal System ◽

Orange Oil ◽

Root Canals ◽

Covered Area ◽

Rotary Instruments ◽

Root Canal Dentin

ABSTRACT Aim To evaluate the effectiveness of ProTaper universal retreatment system in the removal of root canal filling material with thermomechanical compaction, in comparison to manualmechanical technique, associated with orange oil or eucalyptol. Materials and methods Forty extracted lower incisors were filled with thermomechanical compaction technique. After 3 years, the root canal filling was removed by: G1 - manualmechanical technique with orange oil; G2 - manual-mechanical technique with eucalyptol; G3 - ProTaper universal retreatment system with orange oil and G4 - ProTaper universal retreatment system with eucalyptol. In sequence, all root canals were instrumented to F5 instrument. The teeth were longitudinally grooved, images of buccal half were obtained in stereomicroscope and covered area by root canal filling material was measured using image tool software, in cervical, middle and apical radicular thirds. The results were subjected ANOVA and Tukey test (p = 0.05). Results In all thirds, the manual-mechanical technique showed lower presence of root canal filling material on root canal dentin in comparison to ProTaper retreatment universal system, regardless of organic solvent used (p < 0.05). There is no difference between organic solvents in removal root canal filling material (p > 0.05). Conclusion The ProTaper universal retreatment system showed lower effectiveness in removal root canal filling material than manual-mechanical technique, regardless of organic solvents (orange oil or eucalyptol oil) used. Clinical significance Recently rotary instruments have been proposed to removal of root canal filling material. However, there are no studies evaluating its effectiveness in removal root canal filling material in association with orange oil or eucalyptol oil. How to cite this article Guiotti FA, Kuga MC, de Toledo Leonardo R, Chávez-Andrade GM, Magro MG, Cavenago BC, Faria G. Effectiveness of ProTaper Retreatment System associated with Organic Solvents in the Removal of Root Canal Filling Material. World J Dent 2013;4(3):175-179.

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Radiographic and scanning electron microscopic assessment of root canal filling remnants after endodontic re-instrumentation

Brazilian Dental Science ◽

10.14295/bds.2017.v20i1.1325 ◽

2017 ◽

Vol 20 (1) ◽

pp. 80 ◽

Cited By ~ 1

Author(s):

Luciane Geanini Pena Santos ◽

Wilson Tadeu Felippe ◽

Beatriz Dulcineia Mendes Souza ◽

Andrea Cristina Konrath ◽

Mabel Mariela Rodríguez Cordeiro ◽

...

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Root Canal ◽

Filling Material ◽

Root Canal Filling ◽

Root Canals ◽

Filling Materials ◽

Ah Plus ◽

Endodontic Retreatment ◽

Scanning Electron

Objective: Failures in endodontic treatment may occur by several reasons. Endodontic retreatment is an interesting alternative to manage this clinical problem. However, it is not possible to completely remove the root canal filling by any current retreatment technique. The aim of this study was to evaluate the presence of residual root canal filling materials after endodontic re-instrumentation. Material and Methods: Sixty extracted anterior human teeth were prepared by step-back technique with Flexofiles, K-files and Gates-Glidden (GG) burs. Between the use of each file or bur, root canals were irrigated with sodium hypochlorite (NaOCl). Smear layer was removed by irrigation with ethylenediaminetetraacetic acid and NaOCl. After drying with paper points the root canals were randomly divided into 5 groups (n = 12), according to filling material: Resilon cones/Real Seal sealer or gutta-percha cones and Endofill, Sealapex, AH Plus or MTA Fillapex sealers. After one week, root canal fillings were removed using Eucaliptol and K-files. Root canals were re-instrumented with K-files and GG burs sized larger than the first ones. The removal of root canal filling material was analyzed by radiography and scanning electron microscopy (SEM). Statistical analysis was performed using Binary Logistic Regression test (P < 0.05). Results: Radiographic and SEM analysis showed that material from the MTA Fillapex group was better removed than that from Endofill, Sealapex, AH Plus and Real Seal groups. Conclusion: After re-instrumentation, MTA Fillapex group showed less remnants into the root canals than Endofill, Sealapex, AH Plus and Real Seal groups. Residual material was most often found in the apical third.Keywords Dental radiography; Endodontic retreatment; Root canal filling materials; Scanning electron microscopy.

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Influence of apical patency and filling material on healing process of dogs' teeth with vital pulp after root canal therapy

Brazilian Dental Journal ◽

10.1590/s0103-64402005000100002 ◽

2005 ◽

Vol 16 (1) ◽

pp. 9-16 ◽

Cited By ~ 33

Author(s):

Roberto Holland ◽

Arnaldo Sant'anna Júnior ◽

Valdir de Souza ◽

Eloi Dezan Junior ◽

José Arlindo Otoboni Filho ◽

...

Keyword(s):

Connective Tissue ◽

Calcium Hydroxide ◽

Root Canal ◽

Healing Process ◽

Filling Material ◽

Experimental Conditions ◽

Root Canal Filling ◽

Root Canals ◽

Antibiotic Solution ◽

Periapical Healing

The purpose of this study was to investigate the periapical healing process of dogs' teeth with or without apical patency and after root canal filling with two types of sealers. Forty roots of premolars and incisors were utilized. The root canals were overinstrumented and dressed with a corticosteroid-antibiotic solution for 7 days to obtain ingrowth of periapical connective tissue into the canals. After this period, the tissue was removed in half of the specimens (groups with patency) and preserved in the other half (groups without patency). Canals were filled by lateral condensation technique with gutta-percha points and either a calcium hydroxide-based sealer (Sealer Plus) or a Grossman's cement (Fill Canal). The animals were killed by anesthetic overdose 60 days after the endodontic treatment and anatomic pieces were obtained and prepared for histologic examination. Data were evaluated in a blind analysis on the basis of several histomorphologic parameters. The groups without patency had better results (p=0.01) than those in which the ingrown connective tissue was removed. Comparing the sealers, Sealer Plus had significantly better results (p=0.01) than Fill Canal. In conclusion, both the apical patency (presence or absence) and the type of root canal filling material influenced the periapical healing process in dogs' teeth with vital pulp after root canal treatment. The use of a calcium hydroxide-based sealer in teeth without apical patency yielded the best results among the experimental conditions proposed.

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