Influence of different methods of cervical flaring on establishment of working length

• Published in: Journal of applied oral science Vol. 14; no. 5; pp. 351 - 354
• Main Authors: Lazzaretti, Dieison Nardi, Camargo, Bernardo Alievi, Della Bona, Alvaro, Fornari, Volmir João, Vanni, José Roberto, Baratto Filho, Flares
• Format: Journal Article
• Language: English
• Published: Brazil Faculdade de Odontologia de Bauru da Universidade de São Paulo 01-10-2006; Faculdade De Odontologia De Bauru - USP
• Subjects: DENTISTRY, ORAL SURGERY & MEDICINE; Original; Rotary systems; Cervical flaring instruments; Ampliação cervical; Sistemas rotatórios; Brocas de Gates-Glidden; Alargadores cervicais; Cervical flaring; Gates-Glidden burs
• ISSN: 1678-7757; 1678-7765; 1678-7765; 1678-7757
• DOI: 10.1590/S1678-77572006000500010

To investigate the influence of three different rotary systems for cervical flaring on establishment of the real working length.
Thirty mandibular first molars were submitted to conventional endodontic access and initial working length measurement, followed by irrigation/suction of the pulp chamber with 5% sodium hypochlorite. Teeth were randomly divided into 3 groups (n=10) and cervical flaring of the mesiobuccal canals were performed using one of the following instrument systems: Group 1 - Gates-Glidden burs; Group 2 - Orifice Openers; Group 3 - La Axxess system. Two subsequent numbers of instruments of each rotary system were used and the final working length was recorded. A digital calyper was used to record the working length, in millimeters, to investigate a possible discrepancy between initial and final measurements.
Analysis of variance (Anova) na Tukey test revealed statistical difference between Group 1 and Groups 2 and 3 (p pound 0.05).
All groups presented shorter working length after cervical flaring; groups prepared with instruments La Axxes and Orifice Opener presented the best results among the systems studied.