The Effectiveness of Manual and Mechanical Instrumentation for the Retreatment of Three Different Root Canal Filling Materials

Somma, Francesco; Cammarota, Giuseppe; Plotino, Gianluca; Grande, Nicola M.; Pameijer, Cornelis H.

doi:10.1016/j.joen.2008.02.008

Cited by 170 publications

(233 citation statements)

References 20 publications

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“…This is consistent with the findings of other studies (4,5,15,19) and was observed in both radiographic and microscopic analysis of samples. The apical third is a critical zone, requiring a considerable enlargement when cleaning and shaping the canals (20).…”

Section: Discussionsupporting

confidence: 93%

“…efficacy of retreatment techniques by different methods, including radiography (4-6), clearing (6)(7)(8), projection of photograph onto a screen (1,2,9) , stereomicroscopy (2,4,10-13), scanning electron microscopy (1,(14)(15)(16), evaluation of digitized images using a scanner (3), micro-computed tomography (17) and computed tomography (13). Removal of obturation material can be effected with endodontic hand files, heat-carrying or ultrasonic instruments, or engine driven rotary files (10).…”

Section: Effectiveness Of Rotary or Manual Techniques For Removing A mentioning

confidence: 99%

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Effectiveness of rotary or manual techniques for removing a 6-year-old filling material

Duarte

Só

Cimadon³

et al. 2010

Braz. Dent. J.

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The aim of this study was to evaluate the effectiveness of manual and rotary instrumentation techniques for removing root fillings after different storage times. Twenty-four canals from palatal roots of human maxillary molars were instrumented and filled with gutta-percha and zinc-oxide eugenol-based sealer (Endofill) , and were stored in saline for 6 years. Non-aged control specimens were treated in the same manner and stored for 1 week. All canals were retreated using hand files or ProTaper Universal NiTi rotary system. Radiographs were taken to determine the amount of remaining material in the canals. The roots were vertically split, the halves were examined with a clinical microscope and the obtained images were digitized. The images were evaluated with AutoCAD software and the percentage of residual material was calculated. Data were analyzed with two-way ANOVA and Tukey's test at 5% significance level. There was no statistically significant differences (p>0.05) between the manual and rotary techniques for filling material removal regardless the ageing effect on endodontic sealers. When only the age of the filling material was analyzed microscopically, non-aged fillings that remained on the middle third of the canals presented a higher percentage of material remaining (p<0.05) compared to the aged sealers and to the other thirds of the roots. The apical third showed a higher percentage of residual filling material in both radiographic and microscopic analysis when compared to the other root thirds. In conclusion, all canals presented residual filling material after endodontic retreatment procedures. Microscopic analysis was more effective than radiographs for detection of residual filling material.

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Section: Discussionsupporting

confidence: 93%

Section: Effectiveness Of Rotary or Manual Techniques For Removing A mentioning

confidence: 99%

Effectiveness of rotary or manual techniques for removing a 6-year-old filling material

Duarte

Só

Cimadon³

et al. 2010

Braz. Dent. J.

View full text Add to dashboard Cite

show abstract

“…This fact is probably responsible for the several controversies existing among different studies, since root canal anatomy can influence the amount of remaining filling material after retreatment, irrespective of the technique used (BARRIESHI-NUSAR, 2002; GIULINI, COCHETTI; PAGAVINO, 2008;HAMMAD, QUALTROUGH, SILIKAS, 2008). Despite this, some investigations also showed that both retreatment techniques evaluated in this study are incapable to completely remove filling material from root canal walls (ZMENER, PAMEIJER;BANEGAS, 2006;HAMMAD, QUALTROUGH, SILIKAS, 2008;BARLETTA et al, 2008;SOMMA et al, 2008;PIRANI et al, 2009;MOLLO et al, 2012), corroborating our findings.…”

Section: Discussionsupporting

confidence: 86%

“…The development of rotary NiTi instruments especially designed to endodontic retreatments intended to overcome the previous limitations imposed by manual instruments, aiming to remove the root filling material more efficiently (ZMENER, PAMEIJER;BANEGAS, 2006;SOMMA et al, 2008). However, it has been shown that a significant volume of filling material may remain retained in the root canal walls following different retreatment approaches with manual or mechanized instruments (GIULINI, COCHETTI;PAGAVINO, 2008;HAMMAD, QUALTROUGH;SILIKAS, 2008).…”

Section: Discussionmentioning

confidence: 99%

Micro-computed tomographic evaluation of removal and extrusion of root filling material during canal retreatment

Azevedo¹,

Pereira²,

Oliveira³

et al. 2016

Biosci. J.

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ABSTRACT:This study aimed to assess the efficiency of manual and rotary techniques for removing root filling material in endodontic treated canals and to evaluate the extrusion of debris via apical foramen. After access preparation, thirty human lower central incisors were instrumented, filled and divided into two groups (n=15): MNmanual retreatment technique; RT-rotary retreatment technique. The teeth were submitted to micro-computed tomographic scanning before and after the retreatment procedure, for quantifying the remaining filling material by relating the initial and final conditions. The analysis was conducted separately in all root thirds. The volume of material extruded through the apical foramen was also quantified. The data were statistically analyzed using t-test and two-way analysis of variance (ANOVA) at 5% of significance. No significant differences were detected between remaining filling material for the techniques evaluated (p=0.74), even considering the apical third only (p>0.75). Significant differences were found for the remaining filling material verified between the cervical third and middle/apical thirds, with lower values being observed at the cervical third for both groups (p<0.05). Apical extrusion of filling material was verified in seven specimens (2 from MN group and 5 from RT group). Both techniques showed similar performance for removing filling material from the root canal, considering the whole tooth or the root thirds independently. The apical extrusion of filling material observed was not sufficient to indicate which technique has increased tendency to induce more events during retreatments.

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“…119 Resilon was removed faster than gutta-percha. 110,111,116,120 But one study showed that there were no significant differences between gutta-percha and Resilon regarding the time needed for removal. 112,121 In relation to the instruments used for the removal of filling materials, it has been shown that rotary files with chloroform are more effective than rotary files with heat, 110 K3 than Liberator files, 111 Gates-Glidden than system B 116 and heat than K3.…”

Section: Introductionmentioning

confidence: 99%

Resilon: A Comprehensive Literature Review

Lotfi,

Ghasemi,

Rahimi

et al. 2013

Journal of Dental Research

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The Effectiveness of Manual and Mechanical Instrumentation for the Retreatment of Three Different Root Canal Filling Materials

Cited by 170 publications

References 20 publications

Effectiveness of rotary or manual techniques for removing a 6-year-old filling material

Effectiveness of rotary or manual techniques for removing a 6-year-old filling material

Micro-computed tomographic evaluation of removal and extrusion of root filling material during canal retreatment

Resilon: A Comprehensive Literature Review

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