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- 2017
iRoot SP牙本质小管渗透性的研究
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Abstract:
摘要 目的:通过扫描电镜评价iRoot SP牙本质小管渗透性。方法:单根管下颌前磨牙28颗截冠保留牙根14 mm,机扩备根管至F2,随机数字表法将标本分为实验组(A、B组,n=12)和对照组(n=4)。A组:iRoot SP+热牙胶充填;B组:AH Plus+热牙胶充填。实验组样本取冠、中、尖横截面,对照组样本取根管纵切面,SEM观察,实验组测量根管封闭剂在牙本质小管的渗透深度,对照组观察牙本质小管玷污层的去除程度。结果:实验组中,在根尖部AH Plus较iRoot SP牙本质小管渗透深度长,两者有显著差异(P＜0.05),在根管冠部、中部两者渗透深度相当,无统计学意义。对照组中,根管中上段牙本质小管口明显开放,玷污层基本去除,根尖段,有玷污层未完全去除。结论:iRoot SP与AH Plus相比,后者牙本质小管渗透性更强;两者在根管中上段渗透性高于根尖部;玷污层在一定程度上影响了根管封闭剂的渗透性
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