Comparison of Apical Sealing Ability of Warm Vertical Compaction in Different Tapered Canals

Objectives: The study sought to investigate apical sealing ability of warm vertical compaction in different tapered canals: taper 0.06 and taper 0.10 in mandibular molars. Methods: 30 extracted, single-mesialrooted with two orifices and two mature apices human mandibular molars were used. Both canals of each mesial root were instrumented to size 30 with different taper: taper 0.06 and taper 0.10. Then all of canals were obturated with warm vertical compaction technique. Dye penetration and clearing method were used to access the apical sealing ability.Results: The mean microleakage of taper 0.06 canals was 1.20±0.70mm. The mean microleakage of taper 0.10 canals was 0.43±0.29mm(p<0.01). 8 cases of extrusion were found in taper 0.06 canals, while 1 case in taper 0.10 canals(p<0.05).Conclusions: Taper 0.10 was better choice when warm vertical compaction technique was used in mandibular molars.