To compare four gutta-percha filling techniques in simulated C-shaped canals based on filling quality at three cross-sectional levels, filling time and the apical extrusion of gutta-percha.
Forty resin simulated C-shaped canals were constructed and filled using one of four techniques; cold lateral compaction (LC), ultrasonic compaction (UC), single cone with injectable gutta-percha (Obtura II™) (IT) and core-carrier (Thermafil®) (CC). Cross-sections were made at 1 (L1), 3 (L3), and 6 (L6) mm from the canal terminus. Areas of gutta-percha, sealer and voids in each cross-section were measured using an image analysis system. Data were analysed using a univariate general linear model and post hoc test (Dunnett's T3). Data of obturation time was evaluated using the Bonferroni post-hoc test
CC had more gutta-percha and less sealer compared to IT at L1 (P<0 .05="" at="" cc="" em="" gutta-percha="" had="" lc="" less="" level="" marginally="" significantly="" than="" this="">P0>
The core-carrier technique was the most effective technique in the filling of this simulated C-shaped canal.