摘要
目的 比较四种桩钉下无髓牙的抗折力,评价阶梯形核桩钉对无髓牙抗折力的影响。方法 将28个离体上前牙随机分成4组,按常规制作核桩钉及金属全冠,试件分别放置在设计的根部夹具上测试。结果 研制的柱状阶梯形核桩钉及螺纹形核桩钉对无髓牙的抗折力与南京产合金种牙钉无显著差异(P>0.05)。前三组与杭州产牙用根管钉组有非常显著差异(P<0.01)且高于该组。结论 研制的螺纹形和柱状阶梯形核桩钉在无髓牙抗折力方面能满足临床要求。
Objective To compare the fracture resistance of endodontically treated teeth during insertion of four prefabricated posts. Method 28 premaxillary inciser teeth were divided into four groups, made the post-core and metal crown as usual, then tested the experiment on the special jet. Result The developed cylindrical pyramid and thread posts had no significant difference on the fracture resistance with the parallel post which made in Nanjing(P>0.05), The three posts get higher fracture resistance than the thread post which made in Hangzhou(P<0.01). Conclusion The developed cylindrical pyramid and thread posts were satisfied in clinic on the fracture resistance.
出处
《临床口腔医学杂志》
2003年第6期366-367,共2页
Journal of Clinical Stomatology
关键词
桩钉
无髓牙
抗折力
影响
比较
根管治疗
Post-core
tooth fracture
dental resistance
endodontic therapy
