Retreatment in endodontics with plastic core obturators. A new technique

Ruíz‐Piñón, Manuel; Gancedo-Gancedo, Tania; Castelo‐Baz, Pablo; Lorenzo-Pouso, Alejandro I.; Martín‐Cruces, José; Martín‐Biedma, Benjamín

doi:10.1111/aej.12538

Cited by 1 publication

(1 citation statement)

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“…In Group 1 (n = 18), retreatment was carried out with the indirect technique, described in detail by our group [15], where the plastic core was previously removed, followed by the elimination of the surrounding gutta-percha. After removing the composite as mentioned above and locating the canal, the ultrasonic tip Endogal Access #3 (Endogal, Sarria, Lugo, Spain) with an active point was placed in the center of the plastic carrier, and activated for 3-4 seconds without irrigation, in order to soften the carrier through the heat generated.…”

Section: Retreatment Proceduresmentioning

confidence: 99%

Quick retreatment with plastic core obturators in curved canals: an in vitro study.

Gancedo-Gancedo,

Martín-Biedma,

Pereira-Lores

et al. 2023

Preprint

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Objectives Non-surgical retreatment of plastic carrier obturators is complex and requires a superior working time. The aim of this study is to present a new retreatment technique and compare it in terms of safety and speed with a conventional method, in curved canals. Methods 36 lower premolars were selected and sealed with plastic core obturators. Then, the samples were randomized into two retreatment groups. In both groups, nickel-titanium rotary instruments (Endogal, Sarria, Lugo, Spain) were used to remove the old filling material. In Group 0 (Direct technique) gutta-percha and plastic core were eliminated simultaneously. In Group 1 (Indirect technique), the plastic core was initially extracted with the aid of an ultrasonic tip and a Hedstroem file, and then, the surrounding gutta-percha was removed with rotary instruments. Results Time needed for retreatment procedures, plastic carrier fracture, ledge formation and apical transportation were significantly lower in Group 1 (P < 0.05), while there was no statistically significant difference between both groups in terms of remaining material and instrument fracture (P > 0.05). No perforations occurred. Conclusions The new indirect technique proved to be safer, since prior withdrawal of the plastic carrier reduces the stress exerted on the rotary instruments and facilitates its advance along the canal, and it also resulted in shorter working time than other previously described methods. Clinical relevance: The increased safety of the technique and the reduction in the retreatment time allows to increase the disinfection duration in cases where a complete removal of the old filling material is not achieved.

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Section: Retreatment Proceduresmentioning

confidence: 99%