摘要
目的:探讨根管封闭剂iRoot SP及AH Plus对牙根抗折强度的影响。方法:选取45颗符合标准的下颌前磨牙,经根管预备后随机数字表法分为三组,实验组A使用iRoot SP+牙胶尖,组B使用AH Plus+牙胶尖,对照组C不使用根管封闭剂直接使用牙胶尖,三组均行热牙胶垂直加压充填法充填根管。将标本用万能实验机垂直加载直至标本发生折裂,记录牙根折裂时的抗压载荷。结果:实验组A和B的平均抗压载荷值分别为(236.04±34.67)N、(228.55±41.86)N,对照组C为(172.93±12.37)N,实验组与对照组比较差异有统计学意义(P<0.05);实验组之间比较,差异无统计学意义(P>0.05)。结论:根管封闭剂iRoot SP与AH P1us均能够提高牙根抗压载荷,两种封闭剂对牙根抗压载荷的影响短期内无明显差别。
To compare the fracture resistance of roots filled with gutta percha（GP）and different root canal sealers. Method：Forty-five human maxillary premolars match our standards were instrumented and randomly divided into Group A and B,and Group C. Group A was filled with an epoxy resin-based sealer（AH Plus）and GP,Group B was filled with a calcium silicate-based sealer（iRoot SP）and GP,Group C was filled with GP only. All the groups were filled with vertical compaction technique. Compressive loading was carried out using a universal testing machine until fracture occurred,the force required to fracture was measured in Newtons. Result：The mean fracture load values of Groups A and B was（236.04±34.67）N,（228.55±41.86）N,Groups C（185.93±12.37）N,there were no significant differences in fracture strength between Group A and B（P〉0.05）,which the results were significantly superior to Group C（P〈0.05）. Conclusion：All the root canal sealers used in the present study increased the fracture resistance of instrumented root canals,there is no difference in root strength between them.
出处
《中国医学创新》
CAS
2014年第22期34-36,共3页
Medical Innovation of China
