Obturation of accessory canals after four different final irrigation regimes.
The aim of this study was to evaluate accessory canal obturation after four different final irrigation regimes. Sixty-four extracted human lower premolars were instrumented, divided randomly into four groups, and finally irrigated as follows: no irrigation (NO), distilled water (WA), sodium hypochlorite ([SH] 6%, 20 ml for 15 min), and EDTA (15%, 8 ml for 3 min) combined with the SH regimen (ES). The System B and the Obtura II were used to fill the canals. The teeth were cleared and observed under a digital microscope. Obturation material penetration rates in length into the accessory canals were measured and the following values were obtained: 22.3% in group NO, 21.8% in group WA, 53.5% and 68.1% in groups SH and ES, respectively. Statistically significant differences were found when comparing each of the first two groups (NO and WA) with SH and ES groups (p < 0.05). The use of sodium hypochlorite alone or in combination with EDTA in final irrigation flushes may enhance a better obturation material penetration into the accessory canals.
Pulp Biology and Endodontics, Graduate School, Tokyo Medical and Dental University, Japan.
Juan Camilo
JC
Villegas
Takatomo
T
Yoshioka
Chihiro
C
Kobayashi
Hideaki
H
Suda
D001641:Bicuspid; D003786:Dental Pulp Cavity / Q000033:anatomy & histology; D004492:Edetic Acid; D006801:Humans; D011897:Random Allocation; D012388:Root Canal Irrigants; D012389:Root Canal Obturation; D018915:Root Canal Preparation / Q000379:methods*; D016369:Smear Layer; D012973:Sodium Hypochlorite; D014867:Water
D012388:Root Canal Irrigants; D014867:Water; D004492:Edetic Acid; D012973:Sodium Hypochlorite