主桩辅桩联合应用对扁形残根抗折性能的影响

Effects of main post combined with auxiliary pile on the fracture resistance of the flat-shaped residual roots

选择20颗扁根下颌第一前磨牙为研究对象,随机分为实验组和对照组,每组10颗。实验组主桩和辅桩联合应用,对照组仅使用主桩。镍铬合金全冠修复后,用万能材料测试机测试2组样本的抗折载荷。实验组和对照组抗折载荷(N)分别为846.50±40.33和437.90±41.15(P<0.01)。纤维桩主桩辅桩联合应用进行桩核冠修复可提高扁形残根的抗折载荷。

20 first mandibular premolars were randomly divided into 2 groups（ n = 10 ）. The teeth in experimental group were treated by fi- ber main post in combination with auxiliary pile, in control group by single fiber main post, and then were restored by metal crown. They were fixed in universal testing machine. The fi＇acture load（N） of experimental and control group was （846.50 ±40.33） and （437.90 ±41.15 ） respectively（ P 〈 0.01 ）.