Root canal retreatment using reciprocating and continuous rotary nickel-titanium instruments

Souza, Patricia Fonseca de; Gonçalves, Leonardo Cantanhede Oliveira; Marques, André Augusto Franco; Sponchiado, Emílio Carlos; Garcia, Lucas da Fonseca Roberti; Carvalho, Fredson Márcio Acris de

doi:10.4103/1305-7456.156834

Cited by 40 publications

(41 citation statements)

References 17 publications

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“…The manufacturer of Reciproc instruments claimed that also retreatment cases can be safely solved with these instruments as long as the manufacturer's instructions are followed (Yared 2013b). In several in-vitro studies this claim was confirmed (de Souza et al 2015;Marfisi et al 2015;Zuolo et al 2013). But only completely filled root canals were retreated in these studies.…”

Section: Introductionmentioning

confidence: 65%

“…Moreover this publication contains no information about the frequency of Reciproc to reach full WL. There are only invitro studies that evaluate the general possibility to use Reciproc instruments for endodontic retreatments (de Souza et al 2015;Marfisi et al 2015;Zuolo et al 2013). All publications come to the conclusion, that Reciproc was the fastest system for retreatment.…”

Section: Manuscript To Be Reviewedmentioning

confidence: 99%

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Peer Review #1 of "The ability of Reciproc instruments to reach full working length without glide path preparation: a clinical retrospective study (v0.1)"

2017

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Background. Reciproc instruments are the only contemporary root canal instruments where glide path preparation is no longer strictly demanded by the manufacturer. As the complete preparation of root canals is associated with success in endodontic treatment we wanted to assess the ability and find predictors for Reciproc instruments to reach full working length (RFWL) in root canals of maxillary molars in primary root canal treatment (1°RCTx) and retreatment (2°RCTx) cases. Methods. This retrospective study evaluated 255 endodontic treatment cases of maxillary molars. 180 were 1°RCTx and 75 2°RCTx. All root canals were prepared with Reciproc instruments. The groups were compared and in a binary logistic regression model predictors for RFWL were evaluated. Results. A total of 923 root canals were treated with Reciproc without glide path preparation. This was possible in 885 cases (95.9%). In 1°RCTx cases 625 of 647 (96.6%) canals were RFWL and in 2°RCTx cases 260 of 276 (94.2%). In second and third mesiobuccal canals (MB2/3) 94 out of 106 (88.7%) were RFWL with Reciproc in 1°RCTx and in the 2°RCTx treatment group 50 out of 52 cases (96.2%). In mesiobuccal (MB1) canals "2°RCTx" was identified as negative predictor for RFWL (OR 0.24 (CI 0.08-0.77)). In MB2/3 canals full working length was reached less often (OR 0.04 (CI 0.01-0.31)) if the tooth was obliterated and more often if MB2/3 and MB1 canals were convergent (OR 4.60 (CI 1.07-19.61)). Discussion. With Reciproc instruments the vast majority of root canals in primary treatment and retreatment cases can be prepared without glide path preparation.

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Section: Introductionmentioning

confidence: 65%

Section: Manuscript To Be Reviewedmentioning

confidence: 99%

Peer Review #1 of "The ability of Reciproc instruments to reach full working length without glide path preparation: a clinical retrospective study (v0.1)"

2017

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“…The method used for the quantification of the filling material remaining in the root canal after the endodontic retreatment was the radiographic image [5,22]. It is the most used method by the clinicians and easily accessable for the dental surgeons; the radiographic analysis, on the other hand, only produces one two-dimensional image of the sample [2,23,24].…”

Section: Discussionmentioning

confidence: 99%

“…When a treatment failure is observed during clinical / radiographic control, the following procedures are: Root canal retreatment or apical surgery, which can be successful when correctly indicated. However, whenever access to the root canal is possible, the endodontic retreatment must be the first choice [2].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Reciproc and MTwo for Removing Filling Material During Root Canal Retreatment Using a Digital Radiograph System

Oliveira¹,

Peixoto²,

Bueno³

et al. 2018

Open. Dent. J.

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To compare the efficacy of Reciproc (reciprocating) and MTwo (rotary) in the filling material removal during endodontic retreatment. Methods: Thirty simulated root canals (plastic blocks) were prepared and filled. The blocks were divided into 3 groups according to the filling removal techniques: Group I-hand files and Gates Glidden burs; Group II-Rotary technique with second series files of Mtwo system; Group III-Reciprocating technique with instrument R40 Reciproc. The blocks were radiographed, the total area of the root canal and the amount of remaining plug material was calculated. The total time required to complete the procedure was recorded and the instruments were evaluated for fracture or deformation. Results: The mean percentage of obturator material remaining in the root canal wall was 15.36% in Group I, 11.56% in Group II and 10.36% in Group III. There was a statistical difference between Group 1 and the other Groups. There was no statistical difference between Groups II and III. Removal of filling material was significantly faster in Group III (437.433 s), followed by Group II (616.535 s) and Group I (1587.651 s). Conclusion: The best results of filling material removal were obtained by groups II and III without statistical difference between them. The reciprocating technique was the fastest among the techniques tested, followed by the rotary technique and manual technique files.

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“…The other is the invention of reciprocating files for cleaning and shaping. [1617] Numerous studies have proved that reciprocation motion increases the cyclic fatigue resistance of files. [181920]…”

Section: Introductionmentioning

confidence: 99%

Assessment of the role of cross section on fatigue resistance of rotary files when used in reciprocation

et al. 2016

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Objective:The purpose of this study was to assess the role of cross section on cyclic fatigue resistance of One Shape, Revo-S SU, and Mtwo rotary files in continuous rotation and reciprocating motion in dynamic testing model.Materials and Methods:A total of 90 new rotary One Shape, Revo-S SU, and Mtwo files (ISO size 25, taper 0.06, length 25 mm) were subjected to continuous rotation or reciprocating motion. A cyclic fatigue testing device was fabricated with 60° angle of curvature and 5 mm radius. The dynamic testing of these files was performed using an electric motor which permitted the reproduction of pecking motion. All instruments were rotated or reciprocated until fracture occurred. The time taken for each instrument to fracture was recorded. All the fractured files were analyzed under a scanning electron microscope (SEM) to detect the mode of fracture. Statistical analysis was performed using one-way ANOVA, followed by Tukey's honestly significant difference post hoc test.Results:The time taken for instruments in reciprocating motion to fail under cyclic loading was significantly longer when compared with groups in continuous rotary motion. There was a statistically significant difference between Mtwo rotary and the other two groups in both continuous and reciprocating motion. One Shape rotary files recorded significantly longer duration to fracture resistance when compared with Revo-S SU files in both continuous and reciprocating motion. SEM observations showed that the instruments of all groups had undergone a ductile mode of fracture.Conclusion:Reciprocating motion improved the cyclic fatigue resistance of all tested groups.

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Root canal retreatment using reciprocating and continuous rotary nickel-titanium instruments

Cited by 40 publications

References 17 publications

Peer Review #1 of "The ability of Reciproc instruments to reach full working length without glide path preparation: a clinical retrospective study (v0.1)"

Peer Review #1 of "The ability of Reciproc instruments to reach full working length without glide path preparation: a clinical retrospective study (v0.1)"

Effectiveness of Reciproc and MTwo for Removing Filling Material During Root Canal Retreatment Using a Digital Radiograph System

Assessment of the role of cross section on fatigue resistance of rotary files when used in reciprocation

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