Effect of reinforcement with resin composite on fracture strength of structurally compromised roots
Effect of reinforcement with resin composite on fracture strength of structurally compromised roots
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DOI：
10.4012/dmj.28.602
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发表时间：
2009-09-01
影响因子：
2.5
通讯作者：
Miura, Hiroyuki
中科院分区：
文献类型：
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作者：
Fukui, Yuji;Komada, Wataru;Miura, Hiroyuki
本研究旨在评价四种不同桩核系统修复结构受损牙根的抗折强度。32个牛牙根被均匀地塑造以模拟人下颌前磨牙牙根。根据修复体类型将根管分为4组：铸造桩核粘结组（MC组）、树脂复合体组（CR组）、树脂复合体加预制玻璃纤维桩组（FRC组）和厚层双固化树脂复合体加强小直径锥形铸造桩核组（CRM组）。静态加载试验后，记录失效模式和抗断裂性。CRM组（719.38 +/- 196.73 N）与其他组（MC组：429.56 +/- 82.43 N; CR组：349.56 +/- 66.21 N; FRC组：398.94 +/- 112.71 N; p
This study was aimed at evaluating the fracture resistance of structurally compromised roots restored with four different post and core systems. Thirty-two bovine roots were uniformly shaped to simulate human mandibular premolar roots. The roots were divided into four groups based on the type of restoration: cemented cast post and core (Group MC), resin composite build-up (Group CR), resin composite and prefabricated glass fiber post build-up (Group FRC), and thick-layer dual-cured resin composite-reinforced small-diameter tapered cast post and core (Group CRM). After a static loading test, the failure mode and fracture resistance were recorded. Group CRM (719.38 +/- 196.73 N) exhibited a significantly high fracture resistance compared with the other groups (Group MC: 429.56 +/- 82.43 N; Group CR: 349.56 +/- 66.21 N; Group FRC: 398.94 +/- 112.71 N; p