Basic ResearchTechnologyIn Vitro Evaluation of the Effectiveness of ProTaper Universal Rotary Retreatment System for Gutta-Percha Removal with or without a Solvent
Section snippets
Specimen Preparation
Forty extracted single-rooted maxillary anterior teeth were selected with a single straight root canal, fully formed apices in which the first file fitted at the apex was a size 15, and no calcification or internal resorption.
The crowns were removed with a diamond disk (KG Sorensen, Barueri, SP, Brazil) to leave a 16-mm root measured with the aid of calipers. A size 10 K-file was introduced into the canal until it was visible at the apical foramen. The working length was determined by
Results
All of the teeth examined had some endodontic filling remnants in the canals. The mean amounts of remaining gutta-percha/sealer in each group are shown in Table 1. There was no statistically significant difference (P < .05) between the groups.
A significant statistical difference (P < .05) was found between the groups in regard to retreatment time (Table 2). PTR group was faster than SS, SS + C, and PTR + C groups.
Discussion
The complete removal of endodontic filling material is difficult 5, 7, 13, 14, 15, and it is one of the main goals of nonsurgical endodontic retreatment. The root canal system of inadequately instrumented and obturated teeth is especially subject to presenting necrotic tissues and microorganisms responsible for endodontic treatment failure 16, 17, 18.
A hybrid obturation technique was chosen in the present study because it produces a better gutta-percha adaptation to the root canal walls than
References (36)
Conventional endodontic failure and retreatment
Dent Clin North Am
(2004)- et al.
Treatment outcome in endodontics: the Toronto study—phases 3 and 4: orthograde retreatment
J Endod
(2008) - et al.
Endodontic retreatment evaluation of gutta-percha and sealer removal and canal reisntrumentation
J Endod
(1987) - et al.
Three-dimensional evaluation of effectiveness of hand and rotary instrumentation for retreatment of canals filled with different materials
J Endod
(2008) - et al.
Comparative study of removal of current endodontic fillings
J Endod
(2008) - et al.
Chloroform in the endodontic operatory
J Endod
(1992) - et al.
Effectiveness of Profile .04 taper rotary instruments in endodontic retreatment
J Endod
(2000) - et al.
Evaluation of the apical seal produced by a hybrid root canal filling method, combining lateral condensation and thermatic compaction
J Endod
(1984) - et al.
Efficacy of ProTaper retreatment system in root canals filled with gutta-percha and two endodontic sealers
J Endod
(2008) - et al.
Effectiveness of a hand file and three nickel-titanium rotary instruments for removing gutta-percha in curved root during retreatment
Oral Surg oral Med Oral Pathol Oral Radiol Endod
(2006)
Endodontic retreatment: ultrasonics and chloroform as the final step in reinstrumentation
J Endod
In vitro evaluation of the cleansing working time and analysis of the amount of gutta-percha or resilon remnants in the root canal walls after instrumentation for endodontic retreatment
J Endod
Efficacy of two rotary Niti instruments in the removalof gutta-percha during root canal retreatment
J Endod
Efficacy of ProTaper Universal retreatment files in removing filling materials during root canal retreatment
J Endod
Effectiveness of manual and mechanical instrumentation for the retreatment of three different root canal filling materials
J Endod
Endodontic retreatment with halothane versus chloroform solvent
J Endod
The anatomy of the surgical operating microscope and operating positions
Dent Clin North Am
Retreatment of endodontic fillings
Scand J Dent Res
Cited by (110)
Micro-CT evaluation of the removal of root fillings using rotary and reciprocating systems supplemented by XP-Endo Finisher, the Self-Adjusting File, or Er,Cr:YSGG laser
2023, Restorative Dentistry and EndodonticsQuick retreatment with plastic core obturators in curved canals: an in vitro study
2023, Research Square