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- 2018
纤维桩核两种修复方法对前牙不同深度漏斗状根管抗折力的影响
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Abstract:
摘要 目的：比较直接法和间接法制成的同种石英纤维桩核,对不同漏斗深度前牙漏斗状根管修复后的抗折性能,为临床漏斗状根管修复方法的选择提供依据.方法: 收集近期完整拔除的大小相似,形态相近的上颌中切牙30颗,随机分为2个实验组,每组又随机分为漏斗深度3 mm,4 mm,5 mm共3组,第1组样本全部用直接法完成石英纤维桩核冠修复,第2组用间接法完成石英纤维桩核冠修复,所有样本制备试件后置于万能力学试验机上测试其抗折性能,记录折裂时的最大力值并观察样本折裂模式.结果: 两组中间接法制作的石英纤维桩核修复后根管抗折力值高于直接法(P<0.05),漏斗深度越小,修复后的根管抗折力值越大(P<0.05).桩核制作方法和漏斗深度两个变量之间交互作用差异无统计学意义(P>0.05).结论: 不同石英纤维桩核制作方法修复漏斗状根管时,相同漏斗深度时,间接法抗折力值更大;修复失败后,间接法牙根再利用率高于直接法,在大漏斗深度的根管修复时,间接法优于直接法.
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