The effect of glass fiber posts and ribbons on the fracture strength of teeth with flared root canals restored using composite resin post and cores
The effect of glass fiber posts and ribbons on the fracture strength of teeth with flared root canals restored using composite resin post and cores
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DOI：
10.1016/j.jpor.2017.07.002
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发表时间：
2018-01-01
影响因子：
3.6
通讯作者：
Miura, Hiroyuki
中科院分区：
文献类型：
--
作者：
Kubo, Mariko;Komada, Wataru;Miura, Hiroyuki
目的：本研究评估四种不同系统复合树脂修复结构受损牙喇叭根管的断裂强度和失效模式。方法：60颗经根管治疗的牛牙均匀成形，模拟人下颌前磨牙的根管扩张。根据修复类型将根系分为4组，每组15个标本：仅复合树脂芯（对照）、玻璃纤维桩、圆柱形玻璃纤维带和玻璃纤维桩带。使用万能试验机对所有试件进行加载，直至发生断裂。平均骨折载荷比较采用单因素方差分析和Tukey HSD检验（α = 0.05）。观察失效模式，采用Fisher精确检验和Bonferroni校正进行统计分析。结果：纤维桩带组（1035.70 N）和纤维带组（881.77 N）的断裂强度均显著高于对照组（567.97 N） （p < 0.05）
Purpose: This study evaluated the fracture strength and mode of failure of structurally compromised teeth with flared root canals restored using composite resin with four different systems.Methods: Sixty endodontically treated bovine teeth were uniformly shaped to simulate human mandibular premolars with flared root canals. The roots were divided into four groups of 15 specimens each based on the type of restoration: composite resin core only (control), glass fiber post, cylindroid glass fiber ribbons, and glass fiber post and ribbons. All specimens were loaded until fracture occurred using a universal testing machine. Average fracture loads were compared with a one-way ANOVA and Tukey HSD test (alpha =.05). The modes of failure were observed and the Fisher exact test and Bonferroni correction were used for statistical analysis.Results: The fiber post and ribbon group (1035.70 N) and the fiber ribbon group (881.77 N) showed significantly higher fracture strength than the controls (567.97 N) (p