Analysis of apical fitting of .06 and .02 tapered gutta-percha master cones in root canals shaped with ProTaper rotary system

Resumo

The fitting of gutta-percha master cone is important
for the obturation step. The modified single-cone technique using
larger taper has provided better filling of gutta-percha than the
original single-cone technique. Objective: The aim of this study
was to verify if either .02 or .06 tapered gutta-percha master
cone would better fit into the working length of teeth shaped
using ProTaper rotary system. Material and methods: Thirty
distobuccal root canals of mandibular molars were shaped using
F2 ProTaper, and size 40, 35, 30 and 25 0.6 or 0.2 tapered guttapercha cones were tested. The best fitting into the working length
was recorded. The data were gathered and compared with size 25
by using Fisher’s exact test. Results: There was no statistically
significant difference between groups (p = 0.4915). Sizes 30 and
35 were the most used. Conclusion: It can be concluded that
both .02 and .06 tapered gutta-percha master cones showed best
fitting in sizes larger than 0.25 mm in root canals shaped with
ProTaper F2.