Comparison of debris extruded apically and working time used by ProTaper Universal rotary and ProTaper retreatment system during gutta-percha removal

Uezu, Mary Kinue Nakamune; Britto, Maria Letícia Borges; Nabeshima, Cleber Keiti; Pallotta, Raul Capp

doi:10.1590/s1678-77572010000600002

Cited by 27 publications

(28 citation statements)

References 25 publications

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“…It uses Eppendorf tubes to store the extruded debris, and it is reliable, simple, and reproducible. Other methodologies might be used to measure debris extrusion including collecting and weighing paper filters (29), an aluminum crown (30), an acrylic resin container (31), and a Durapore filter (3M, St Paul, MN) (32).…”

Section: Discussionmentioning

confidence: 99%

Apical Extrusion of Debris in Flat-oval Root Canals after Using Different Instrumentation Systems

Kirchhoff

Fariniuk

Mello

2015

Journal of Endodontics

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Section: Discussionmentioning

confidence: 99%

Apical Extrusion of Debris in Flat-oval Root Canals after Using Different Instrumentation Systems

Kirchhoff

Fariniuk

Mello

2015

Journal of Endodontics

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“…The debris apically extruded during the primary and secondary canal treatment has often been reported (11,(13)(14)(15)18,(22)(23)(24). However, to the best of our knowledge, there is no study evaluating the cytotoxicity of the debris apically extruded during the endodontic retreatment.…”

Section: Discussionmentioning

confidence: 99%

“…No retreatment method removes the root fillings completely (4)(5)(6)13,18,21,22). It is virtually impossible to obtain a completely clean canal space regardless of the technique used.…”

Section: Discussionmentioning

confidence: 99%

Cytotoxic effect of the debris apically extruded during three different retreatment procedures

et al. 2016

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Abstract:We evaluated the cytotoxic effects of the debris apically extruded during root canal retreatment on primary human osteoblast (HOb) cells in vitro. TNF-α and IL-1β levels were also measured. We examined three different techniques: conventional hand-files, and Mtwo and Reciproc retreatments. Filled mandibular incisors were prepared for a cytotoxicity assay in an experimental root model. The material was divided into three groups according to the technique used. Ten teeth were used as control. HOb cells were exposed to the extruded content and cytotoxicity was evaluated using the MTT test (assessing cell metabolic activity). TNF-α and IL-1β production was also analyzed using enzyme-linked immunosorbent assay. Then, all the teeth were radiographed and the residual filling material was quantified. Data were subjected to analysis of variance (ANOVA) and Tukey's test (P < 0.05). The conventional hand-file technique was significantly more cytotoxic than the other methods (P < 0.05). Reciproc was less cytotoxic than Mtwo retreatment (P < 0.05). All endodontic retreatment techniques led to a significant upregulation of IL-1β levels (P < 0.05). However, only the conventional hand-file technique caused a significant increase in TNF-α levels (P < 0.05). Root-filling removal did not affect the levels of these proteins (P > 0.05). The Reciproc system required less time than the other two methods to remove the root-filling materials (P < 0.01). The endodontic retreatment with Reciproc was the least cytotoxic and the least time-consuming method of gutta-percha and sealer removal. (J Oral Sci 58, 211-217, 2016)

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“…However, it is known that filling removal can lead to extrusion of debris and cause periapical inflammation, flare-ups or failure of apical healing (5). Different amounts of extruded debris have been reported, depending on the instrumentation technique and the design of instruments (5)(6)(7)(8)(9)(10)(11)(12).…”

Section: Introductionmentioning

confidence: 99%

Apically extruded debris in filling removal of curved canals using 3 NiTi systems and hand files

Delai¹,

Boijink²,

Hoppe³

et al. 2018

Braz. Dent. J.

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The aim of this study was to assess the amount of apically extruded debris during filling removal with WaveOne Gold (WOG), ProTaper Universal Retreatment (PTR), D-RaCe Retreatment (DRR) or hand files (HF), to compare the working time during filling removal, and to describe failures of NiTi instruments. Forty mesiobuccal roots of maxillary first molars were prepared with WOG Primary, obturated and divided into 4 groups (n=10), according to the instruments used: WOG, PTR, DRR or HF. Distilled water was used as irrigant and the extruded debris were collected in Eppendorf tubes and dried. The amount of extruded debris was determined by subtracting the final from the initial weight. The time of filling removal for each canal was recorded and the instruments used were analyzed pre and post-operatively by SEM. Kruskal-Wallis and Dunn's test analyzed extruded debris data and ANOVA, followed by Tukey's test, compared the working time data (α=0.05). Instrument deformation and fracture were described. WOG produced significantly less debris compared with HF and DRR (p<0.05), and similar to PTR (p>0.05). HF, PTR and DRR showed no significant difference (p>0.05). Working time in HF group was significantly higher than others (p<0.05). SEM analyses showed, from the 18 instruments evaluated, 3 fractures and 10 deformations. All instruments tested caused debris extrusion. WOG was associated with less extrusion than DRR and HF. Filling removal with HF was slower than with the other instruments. All NiTi systems presented fracture and deformation.

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Comparison of debris extruded apically and working time used by ProTaper Universal rotary and ProTaper retreatment system during gutta-percha removal

Cited by 27 publications

References 25 publications

Apical Extrusion of Debris in Flat-oval Root Canals after Using Different Instrumentation Systems

Apical Extrusion of Debris in Flat-oval Root Canals after Using Different Instrumentation Systems

Cytotoxic effect of the debris apically extruded during three different retreatment procedures

Apically extruded debris in filling removal of curved canals using 3 NiTi systems and hand files

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