Efficacy of three rotary NiTi instruments in removing gutta‐percha from root canals

Taşdemir, Tamer; Er, Kürşat; Yildirim, Tahsin; Çelik, Davut

doi:10.1111/j.1365-2591.2007.01335.x

Cited by 141 publications

(192 citation statements)

References 29 publications

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“…CT scanning was used in the present investigation in order to outweigh the limitations of the methodologies previously applied in endodontic retreatment studies, such as displacement of the filling debris during cleavage (1-5) and twodimensional imaging on a three-dimensional structure (6)(7)(8)(9). Although this methodology has been extensively employed in endodontic instrumentation research (18,19), its use in endodontic retreatment research is limited (10).…”

Section: Discussionmentioning

confidence: 99%

“…In the studies of Masiero and Barletta (6) and Gergi and Sabbagh (7), radiographs were taken after removing the filling material from the root canals, digitized and analyzed by means of software packages developed for civil engineering and architecture, the AutoCAD 2000 (Autodesk Inc., San Rafael, CA, USA) and AutoCAD 2004 (Mechanical Desktop Power Pack, Microsoft, Redmond, WA, USA), respectively. In recent studies (8,9), the specimens were rendered transparent, photographed using a digital camera attached to a microscope and the amount of residual filling material was calculated using an image-analysis software (Comef 4.0; OEG Messtechnik, Frankfurt, Germany). These methods have limitations since radiographic and photographic images provide only two-dimensional information of a three-dimensional structure.…”

Section: Introductionmentioning

confidence: 99%

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Computed tomography assessment of the efficiency of different techniques for removal of root canal filling material

Dall'Agnol

Hartmann²,

Barletta

2008

Braz. Dent. J.

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This study evaluated the efficiency of different techniques for removal of filling material from root canals, using computed tomography (CT). Sixty mesial roots from extracted human mandibular molars were used. Root canals were filled and, after 6 months, the teeth were randomly assigned to 3 groups, according to the root-filling removal technique: Group A -hand instrumentation with K-type files; Group B -reciprocating instrumentation with engine-driven K-type files; and Group C rotary instrumentation with engine-driven ProTaper system. CT scans were used to assess the volume of filling material inside the root canals before and after the removal procedure. In both moments, the area of filling material was outlined by an experienced radiologist and the volume of filling material was automatically calculated by the CT software program. Based on the volume of initial and residual filling material of each specimen, the percentage of filling material removed from the root canals by the different techniques was calculated. Data were analyzed statistically by ANOVA and chi-square test for linear trend (=0.05). No statistically significant difference (p=0.36) was found among the groups regarding the percent means of removed filling material. The analysis of the association between the percentage of filling material removal (high or low) and the proposed techniques by chi-square test showed statistically significant difference (p=0.015), as most cases in group B (reciprocating technique) presented less than 50% of filling material removed (low percent removal). In conclusion, none of the techniques evaluated in this study was effective in providing complete removal of filling material from the root canals.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Computed tomography assessment of the efficiency of different techniques for removal of root canal filling material

Dall'Agnol

Hartmann²,

Barletta

2008

Braz. Dent. J.

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“…This task can easily be accomplished with rotary files, which allow removal of the bulk of root filling material within a few minutes (3)(4)(5)(6)(7)(8)(9). However, recent studies have indicated that such a procedure performed on its own leaves a significant amount of root filling residue along the canal wall (4,(10)(11)(12).…”

Section: Introductionmentioning

confidence: 99%

Self-Adjusting Files in Retreatment: A High-resolution Micro–Computed Tomography Study

Solomonov

Paqué

Kaya

et al. 2012

Journal of Endodontics

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INTRODUCTION: Rotary instruments that are used for retreatment are very effective, but most of them leave root filling residue in the canal. The aim of this study was to evaluate the efficacy of removing gutta-percha-based root fillings with ProTaper retreatment files (Dentsply Maillefer, Ballaigues, Switzerland) followed by F1 and F2 ProTaper instruments and to compare these results with those obtained with a 25 .06 ProFile instrument (Dentsply Maillefer) followed by the Self-Adjusting File (SAF; ReDent, Ra'anana, Israel) using high resolution micro-computed tomography (CT) scanning. METHODS: Twenty-eight mandibular molar teeth with oval distal root canals were divided into 2 equal groups of 14 teeth each. The distal root canals were instrumented with ProTaper files up to an F2 instrument, the roots were subsequently filled, and the root filling was allowed to set fully. Removal of the root canal filling was performed with D1-D3 ProTaper retreatment files followed by F1 and F2 ProTaper instruments or with a 25 .06 ProFile followed by SAFs. Chloroform was used in both groups to assist in the removal of the root filling material. High-resolution micro-CT scans were used to measure the residual quantities of the root filling material after completion of the procedures. Statistical analysis was performed using the Wilcoxon test and the Student t test. RESULTS: The median root filling residue in the ProTaper group was 5.39% (interquartile range [IQR] = 4.71) of the original volume of the root canal filling. In the ProFile and SAF group, the median residue was 0.41% (IQR = 1.64, P < .001). An arbitrarily selected threshold of less than 0.5% residue was defined as "effectively cleaned," and 57% of the teeth treated with the ProFile and the SAF met this threshold, whereas none of the cases in the ProTaper group did. The ProFile and SAF procedure required less time than the ProTaper protocol. CONCLUSIONS: None of the retreatment methods rendered all of the canals completely free of all root filling residue. Under the conditions of this study, the ProFile and SAF procedure was more effective than the ProTaper procedure and left significantly less root filling residue in the root canal.

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“…However, within the consideration of the currently available re-treatment studies, the results have shown the remnant filling materials to be remained through the canal walls even if solvents or rotary/hand instruments have been applied. [16][17][18][19] Therefore, the re-treatment protocol has to be supported with some additional irrigation systems, medicaments and/or irrigants to obtain total remove of root filling material and to reach all the points in root canals regarding uninstrumented areas which depends on the complex anatomy.…”

Section: Discussionmentioning

confidence: 99%

Efficacy of Ethylenediamine Tetraacetic Acid and Calcium Hydroxide in the Removal of Root Canal Filling During Retreatment

Güven¹

2017

Cumhuriyet Dental Journal

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A B S T R A C TObjective: To compare the effect of Ethylenediamine tetraacetic acid (EDTA) and calcium hydroxide [Ca(OH)2] in the removal of root canal filling material during retreatment procedure.Methodology: Eighty extracted, single-rooted human teeth were used. Root canals were shaped with a crown-down technique using Ni-Ti rotary instruments (ProTaper, Dentsply Maillefer, Switzerland) and filled with a cold lateral condensation method. AH Plus was used as a sealer. After filling, the teeth were divided into 4 groups and root fillings were removed by ProTaper Universal rotary retreatment system. In each group different irrigation and disinfection protocols were followed; Group I. Sodium hypochlorite (5.25%) + EDTA (17%-1 min.) Group II. Sodium hypochlorite (5.25%) Group III. Sodium hypochlorite (5.25%) + Ca (OH)2 Group IV. Sodium hypochlorite (5.25%) + Ca(OH)2 + EDTA (17%-1 min.). Irrigation with 17% EDTA was performed only before D3-Retreatment instrumentation in all groups. AutoCAD system was used to detect the amount of residual root canal filling material. The results were statistically analyzed by SPSS (Statistical Package for Social Sciences) for Windows 15.0, one way ANOVA and Tukey's HSD tests. The significance was evaluated at the level of p<0.05. Results:The amount of the remnant filling material in the root canals retreated in Group I was less than the amount of the material in Group II (p<0.01) and Group III (p<0.05). There was no significant difference observed between the other groups in terms of the quantity of the remnant root canal filling materials (p>0.05).Conclusions: Irrigating the canals with EDTA enhanced the removal of root canal filling during retreatment. However, disinfecting the canals with Ca(OH)2 had no effect in the removal of filling material.

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Efficacy of three rotary NiTi instruments in removing gutta‐percha from root canals

Abstract: Under the experimental conditions, ProTaper left significantly less gutta-percha and sealer than Mtwo instruments. Complete removal of materials did not occur with any of the instrument systems investigated.

Cited by 141 publications

References 29 publications

Computed tomography assessment of the efficiency of different techniques for removal of root canal filling material

Computed tomography assessment of the efficiency of different techniques for removal of root canal filling material

Self-Adjusting Files in Retreatment: A High-resolution Micro–Computed Tomography Study

Efficacy of Ethylenediamine Tetraacetic Acid and Calcium Hydroxide in the Removal of Root Canal Filling During Retreatment

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