Efficacy of three different rotary files to remove gutta‐percha and Resilon from root canals

Marfisi, K.; Bellido, Montserrat Mercadé; Plotino, Gianluca; Durán-Sindreu, Fernando; Bueno, Rufino; Roig, Miguel

doi:10.1111/j.1365-2591.2010.01758.x

Cited by 84 publications

(110 citation statements)

References 26 publications

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“…Several techniques have been proposed for removing root filling material, but none have shown the ability to remove gutta-percha and sealer completely from canal walls 8,9,11 . The removal of gutta-percha by using hand instruments is a slow and difficult process, especially when the filling material is well compacted.…”

Section: Discussionmentioning

confidence: 99%

“…The removal of gutta-percha by using hand instruments is a slow and difficult process, especially when the filling material is well compacted. Thus, Ni-Ti rotary instruments are recommended for reducing clinical time and facilitate removal 9,11 . However, in this study, we observed that even after using Ni-Ti rotary instruments specifically developed for retreatment, the filling material was not completely removed from the root canal walls, corroborating the findings of other studies 7,9-11 .…”

Section: Discussionmentioning

confidence: 99%

“…Most experimental studies comparing the efficacy of different techniques for retreatment were conducted using single straight root canals 5,8,10,11 , to simplify the standardization of specimens. Although teeth with complex anatomy represent a common clinical situation 23 , investigations of non-surgical retreatment techniques for teeth with 2 curved canals and an isthmus are rare.…”

Section: Discussionmentioning

confidence: 99%

“…Several techniques have been used to remove sealer and gutta-percha, including heat-bearing instruments, stainless steel hand files, nickel-titanium (Ni-Ti) rotary instruments and ultrasonic tips, with or without the combined use of solvents [5][6][7][8] . Nevertheless, studies have shown that none of these retreatment procedures can completely clean the root canal walls [9][10][11] , particularly in the apical third 12 .…”

Section: Introductionmentioning

confidence: 99%

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Efficacy of passive ultrasonic irrigation in removing root filling material during endodontic retreatment

Michelon

Frighetto

Lang

et al. 2016

Rev. odontol. UNESP

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ResumoIntrodução: O retratamento endodôntico requer a remoção de todos os materiais obturadores para a limpeza, o preparo e a obturação subsequentes do canal radicular. Objetivo: Avaliar a eficácia da Irrigação Ultrassônica Passiva (IUP) na remoção de material obturador residual após a desobturação com sistema rotatório de níquel-titânio. Material e método: Dezoito raízes mesiais de molar inferior com istmos foram preparadas e obturadas. A obturação foi removida com o sistema rotatório ProTaper Retratamento e limas manuais tipo K. Os espécimes foram randomizados em dois grupos (n = 9), ambos irrigados com NaOCl a 2,5% e EDTA a 17%. No grupo Convencional, a seringa de irrigação foi utilizada. No grupo da IUP, a técnica da IUP foi usada. As raízes foram seccionadas longitudinalmente e avaliadas em estereomicroscópio. O teste t de Student foi usado para comparar os grupos e o modelo linear geral foi usado para comparar os terços cervical, médio e apical dentro de cada grupo, no que diz respeito a porcentagem de material obturador residual. Resultado: Não houve diferença estatisticamente significante entre os grupos, independentemente do terço do canal radicular analisado (P > 0.05). No grupo da IUP, o terço apical mostrou uma porcentagem significativamente mais alta de material obturador residual quando comparado aos terços cervical (P = 0.038) e médio (P = 0.029). Conclusão: A IUP não foi mais eficaz do que a técnica convencional na remoção de material obturador remanescente durante o retratamento endodôntico em canais radiculares com anatomia complexa.Descritores: Irrigação; retratamento; canal radicular; ultrassom. AbstractIntroduction: The aim of endodontic retreatment is to remove the previous root filling materials completely to allow for the subsequent steps of cleaning, canal shaping and filling replacement. Objective: To evaluate the efficacy of passive ultrasonic irrigation (PUI) in the removal of residual root filling material after removing the bulk of the root filling with nickel-titanium rotary instruments. Material and method: Eighteen mesial isthmus-containing roots of human mandibular molars were prepared and filled. The root canal filling was removed with the ProTaper Retreatment system and K-files. The specimens were randomized into 2 groups (n = 9), both irrigated with 2.5% NaOCl and 17% EDTA. In the conventional group, an irrigation syringe was used. In the PUI group, the PUI technique was used. The roots were sectioned longitudinally and evaluated under stereomicroscopy. Student's t test was used to compare groups and the general linear model was used to compare the apical, cervical, and middle root thirds within each group, in regard to the percentages of remaining residual filling material. Result: There was no statistically significant intergroup difference, irrespective of which root third was evaluated (P > 0.05). In the PUI group, the apical third showed a significantly higher percentage of residual filling material, in comparison with the cervical (P = 0.038) and middle (P = 0.029) thir...

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Efficacy of passive ultrasonic irrigation in removing root filling material during endodontic retreatment

Michelon

Frighetto

Lang

et al. 2016

Rev. odontol. UNESP

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“…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. 122 There were no significant differences between Mtwo, Twisted files, Protaper and R-Endo 115 and Hedestrome files in terms of Resilon removal. 118 Resilon has higher solubility than gutta-percha in chloroform and its solubility increases over time.…”

Section: Introductionmentioning

confidence: 91%

Resilon: A Comprehensive Literature Review

Lotfi,

Ghasemi,

Rahimi

et al. 2013

Journal of Dental Research

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Efficacy of reciprocating and rotary systems for removing root filling material: A micro-computed tomography study

et al. 2014

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This study aimed to use micro-computed tomography (micro-CT) imaging to evaluate the efficacy of the reciprocating and rotary systems for the removal of root filling materials in comparison with hand files. Thirty maxillary incisor teeth were prepared with ProTaper Universal (PTU) system, filled using cold lateral condensation and randomly divided into three groups of ten teeth each. The root fillings were removed with WaveOne Reciprocating and ProTaper Universal Re-treatment (PTU-R) systems and hand files. Micro-CT was used to scan the specimens before and after each treatment step. Percentage of volume of residual root filling was measured. The operating time was recorded. PTU-R instruments yielded better results for removing filling material, even though there was no statistically significant difference between PTU-R and WaveOne groups. Reciprocating and rotary systems showed similar performances in terms of efficacy and operating time for root filling removal.

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Efficacy of three different rotary files to remove gutta‐percha and Resilon from root canals

Abstract: No system removed the root filling materials entirely. Mtwo Retreatment files required less time to remove root filling material than the other instruments. Resilon was removed significantly better from the canal walls than gutta-percha, irrespective of the rotary instruments used.

Cited by 84 publications

References 26 publications

Efficacy of passive ultrasonic irrigation in removing root filling material during endodontic retreatment

Efficacy of passive ultrasonic irrigation in removing root filling material during endodontic retreatment

Resilon: A Comprehensive Literature Review

Efficacy of reciprocating and rotary systems for removing root filling material: A micro-computed tomography study

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