Resumo

AMADEU, Susy Cristina Gouvêa et al. Analysis of the preparation obtained by three techniques of root canal instrumentation using computed tomography. RGO, Rev. gaúch. odontol. (Online) [online]. 2013, vol.61, n.4, pp. 535-541. ISSN 1981-8637.

Objective Use computed tomography to compare three methods of root canal instrumentation. Methods Thirty mandibular molar mesiobuccal canals were divided in three groups according to instrumentation technique: Group 1 - hand instrumentation with balanced force technique; Group 2 - Protaper Universal rotary system following manufacturer's instructions; and Group 3 - Protaper Universal rotary system and Gates-Glidden drills. Teeth were evaluated by computed tomography before and after preparation at three axial cuts: 3mm, 5mm, and 7mm from the root apex. Data were subjected to statistical analysis using the F, Chi-Square, Likelihood Ratio Chi-Square, and Mantel-Haenszel Chi-Square tests. Results Group 3 showed significantly greater dentin removal with no tendency towards mesial or distal canal transportation, compared with Groups 1 and 2. Also, Group 3 required the least amount of time for instrumentation. Conclusion Association of rotary instrumentation and Gates-Glidden drills is a safe and effective technique for root canal preparation.

Palavras-chave : Dental instruments.; Dental pulp cavity.; Endodontics.; Tomography, X-Ray Computed..