The shaping ability of manual ProTaper on mandibular second molars / 实用口腔医学杂志

ABSTRACT

Investigate the cleaning ability of manual ProTaper on mandibular second molars with C-shaped (c-shaped root) or normal root canal(separated root). Twenty mandibular second molars with C-shaped root or with separated roots were sectioned at 3.0, 5.5 and 8.0 mm from the root apex. The images of pre-preparation and F1, F2, and F3-prepapared of manual ProTaper were captured respectively. The cross-sectional areas of the canals were measured and the formula of area after treatment/area before treatment was used to calculate the area ratio. The data were analyzed by SPSS 10.0. The results showed that there was no statistically difference between cross-section root canal area ratios in two groups. Significant differences were found between the cross-section canal area ratio of F1 and F2, F1 and F3 at section 5 mm of S group, and F1 and F3 at section 3 mm of C group. The results suggested that the increasing of cross-section ratio of the two kinds of canals was not obviously concerned with their anatomical morphology.