下颌磨牙根管锥度对垂直加压充填技术根尖封闭性的影响

目的：研究在下颌磨牙不同锥度的根管中,垂直加压充填技术根尖封闭性与根管充填质量的差异。方法：选取30颗近中根为单根的下颌磨牙,其根管有两个独立的根管口与根尖孔,截去牙冠及远中根后将近中两根管分别预备为0.06与0.10锥度,采用垂直加压充填技术进行充填。运用染色透明法观察根管封闭效果及根管充填质量。结果：0.06锥度根管微渗漏平均为（1.20±0.70）mm,0.10锥度根管微渗漏平均为（0.43±0.29）mm（P〈0.01）。0.06锥度根管组超充8例,0.10锥度根管组超充1例（P〈0.05）。结论：在下颌磨牙采用垂直加压技术时0.10锥度根管能得到更好的充填效果。

Comparison of Apical Sealing Ability and Obturation Quality in Different Tapered Canals-Taper 0.06 and Taper 0.10 in Mandibular Molars

Objective: 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 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 tapers-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...