Resumo

GERALDES PAPPEN, Fernanda et al. Effectiveness of root canal rotary and oscillatory peraparation techniques in flattened root canals. Acta odontol. venez [online]. 2007, vol.45, n.4, pp.528-533. ISSN 0001-6365.

This study evaluated the biomechanical preparation of flattened root canals, considering the effective area of instrumentation, using four different techniques: oscillatory instrumentation using Endo-Eze instruments; rotary instrumentation using Profile system; oscillatory instrumentation using Profile system; and rotary instrumentation with Profile system associated to oscillatory instrumentation with Endo-Eze system. A total of 40 distal roots of lower molars were used. These teeth were included in transparent resin blocks and grooves were made in the external portion of the block. The resin block containing the teeth was cut showing the median third of the root. Using a digital camera, the lower portion from the median third of the root were photographed, and the images recorded. After instrumentation, new images were obtained. The images were transferred to AutoCAD, the root canal was demarcated and the root canal area was measured. The results showed no statistically significant difference between the groups. However, a more uniform enlargement was observed in the group where oscillatory and rotary instrumentation were associated.

Palavras-chave : oscillatory instrumentation; rotary instrumentation; flattened root canals; root canal preparation.