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目的研究即刻备根后对根尖剩余充填材料施以垂直向下的压力能否减小根尖区微渗漏。方法采用体外研究,将48颗离体牙分成A1B1C1A2B2C2六组,使用同一种根管封闭剂Ahplus,根充后即刻备桩,其中A1B1C1即刻备桩后对根尖剩余充填材料施以2kg垂直向下的压力,A2B2C2组则不作此处理设为对照组,经微渗漏测定结果。结果制备桩道后使用垂直加压器加压根尖剩余充填材料的A1组和B1组比未经垂直加压的A2组和B2组根尖封闭效果明显,并具有统计学差异,但在根尖三分之一弯曲半径小于3mm则无明显统计学差异。结论根充后即刻备桩,并对根尖剩余充填材料施以2kg垂直向下的压力能显著提高根尖区的封闭性,减少根尖区微渗漏。
Objective To study whether the vertical downward pressure on the apical filling material after root preparation could reduce the microleakage in apical area. Methods In vitro study, the 48 isolated teeth were divided into six groups A1B1C1A2B2C2, using the same root canal sealant Ahplus, immediately after filling the stump, including A1B1C1 immediately after stumping the root tip of the remaining filling material to 2kg vertically down A2B2C2 group did not make this treatment as a control group, the results of microleakage. Results The apical sealing effect of Group A1 and Group B1 using vertical pressure device after filling vertical appenders was significantly higher than that of Group A2 and Group B2 without vertical pressurization, and there was statistical difference. However, One-third of the bending radius is less than 3mm, no significant statistical difference. Conclusion Stubbing immediately after root filling and exerting a vertical downward pressure of 2 kg on the residual root filling materials can significantly improve the apex sealing and reduce the microleakage in apical area.