Resumen

LEONARDI, Lilia E; ATLAS, Diana M  y  RAIDEN, Guillermo. Comparación de dos métodos para evaluar la transportación apical. Acta odontol. venez [online]. 2007, vol.45, n.3, pp.354-358. ISSN 0001-6365.

Abstract The purpose of the present study was to compare a radiographic versus anatomic method for apical transportation measurement in curved root canal. Sixty recently removed human mandibular molars with buccolingual curved root canals ranging from 15º to 45º, were selected. The distal roots were removed to avoid radiographs interferences with mesiodistal incidence. Before been sectioned mesial roots were inclosed in transparent resin using a grilon key-like muffle with modificated Bramante´s procedure. The inclosed teeth were radiographed buccolingually and mesiodistally using a plastic dispositive to allow for standart pre and postinstrumentation radiographs. The roots canals were horizontally sectioned. Cuts made at 3 mm from the apex and photographed. The sections were reassembled in the muffle and the canals were instrumented with manual and mechanized techniques. After instrumentation was finished, radiographs of the teeth and photographs of the segment were taken. Transportation radiographic measurement was made with a micrometer on radiographic projection tracing magnified 8 times, in two planes. Transportation anatomic measurement was made analyzing photographs pre and posinstrumentation using and Image 1.45 Sofware Macintosh computer. Radiographic and anatomic methods showed different data due to the different levels and criteria of measurement. Statistical analysis (ANOVA) showed significant difference (p<0.0001) between radiographic and anatomic methods. Media comparison between radiographic and anatomic transportation, in each group, showed no significant difference (p=0.21)

Palabras clave : apical transportation; Cursor W & H; mechanical instrumentation.