桩腔预备的不同时机对两种根管糊剂根尖封闭效果的影响

目的探讨桩腔预备的不同时机对两种常用根管糊剂根尖封闭效果的影响。方法选取70颗单根管上颌前牙,采用Sealite Ultra糊剂或AH Plus糊剂和牙胶尖侧向加压充填根管,即刻或1周后进行桩腔预备,采用染料渗透法测定根尖渗漏量,进行统计分析。结果两种糊剂都无法完全封闭根管,用两种糊剂充填组间微渗量比较差异无统计学意义,而即刻进行桩腔预备组与延迟桩腔预备组相比,微渗漏显著减少。结论延迟桩腔预备可以削弱充填材料封闭根管的能力。

Impact of Immediate and Delayed Post Space Preparation on Coronal Leakage along Root Fillings

Objective To study the effects of immediate and delayed post space preparation on the sealing ability of filling materials through measuring the volume of canal microleakage.Methods 70 extracted mandibular premolars each with single canal were selected.The Sealite Ultra paste or AH Plus paste and lateral pressure rubber pointed teeth filling root canal,immediately or after a week post space was prepared,the dye determination method was used to test leakage,and statistical analysis was done.Results Neither of the two pastes completely closed root canal,with no significant differences between two paste fillings;immediate post space preparation compared to delayed pile cavity preparation,the leakage was significantly reduced.Conclusion The delayed post space preparation can reduce the root canal sealing ability of filling materials.