Analysis of the instrumentation time and cleaning between manual and rotary techniques in deciduous molars

Resumo

The rotary instrumentation provides shorter
instrumentation time with greater comfort for the patient but few
studies have been conducted on primary teeth. Objective: this study
compared the cleaning ability and instrumentation time between
manual and rotary techniques in deciduous molars. Material and
methods: a total of 15 molars were selected, submitted to coronal
opening and root canal filled with India ink. After 48 hours, the
teeth were divided into three groups: G1 – manual instrumentation
with K files, G2 – rotary system Endowave, and G3 – rotary system
ProTaper. After instrumentation, the teeth were sectioned and three
blinded examiners evaluated the root canal cleaning. The mode of
scores of examiners was analyzed by the Kruskal-Wallis test. The
instrumentation time was recorded and the results were statistically
analyzed by ANOVA. Results: the ProTaper system presented shorter
instrumentation time compared to manual instrumentation (p = 0.0339). Endowave system did not present statistically significant difference in
the instrumentation time compared to the other groups. There were
no significant differences between groups concerning the ability of root
canal cleaning (p = 0.6188). Conclusion: ProTaper system revealed
shorter treatment time and similar cleaning ability compared to the
other techniques, thus being indicated for deciduous teeth.