Journal of Applied Oral Science
versão impressa ISSN 1678-7757
LAZZARETTI, Dieison Nardi et al. Influence of different methods of cervical flaring on establishment of working length. J. Appl. Oral Sci. [online]. 2006, vol.14, n.5, pp. 351-354. ISSN 1678-7757. http://dx.doi.org/10.1590/S1678-77572006000500010.
OBJECTIVE: to investigate the influence of three different rotary systems for cervical flaring on establishment of the real working length. MATERIAL AND METHODS: 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. RESULTS: Analysis of variance (Anova) na Tukey test revealed statistical difference between Group 1 and Groups 2 and 3 (p£ 0.05). CONCLUSIONS: 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.
Palavras-chave : Cervical flaring; Rotary systems; Gates-Glidden burs; Cervical flaring instruments.