Fracture strength of flared root canals reinforced using different post and core materials
Fracture strength of flared root canals reinforced using different post and core materials
复制标题
使用不同桩核材料加固的扩口根管的断裂强度
DOI：
10.1111/jopr.13616
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Fueki Kenji
中科院分区：
文献类型：
--
作者：
Tsukahara Ruri;Komada Wataru;Oishi Shinya;Yoshimatsu Shu;Miura Hiroyuki;Fueki Kenji
材料与方法40颗模拟人下颌前磨牙扩口根管的根管治疗后的牛牙，分别用玻璃纤维桩（FRC）、复合树脂（RC）、陶瓷核（LD）和树脂复合增强陶瓷核（RLD）进行增强，单氧化锆冠修复（每组10例）。对氧化锆全冠修复后的根管的断裂强度和断裂方式进行评价。在Tukey HSD检验后，使用单因素方差分析（ANOVA）比较断裂强度。采用多元回归分析方法分析桩核材料对断裂载荷的影响。结果RLD的平均断裂强度显著高于RC、FRC和LD（p< 0.05），而RC、FRC和LD之间无显著性差异（p <0.05）。回归分析发现，二硅酸锂桩的抗折强度显著低于复合树脂桩，而核的抗折强度显著高于复合树脂桩（p< 0.05），而复合树脂桩与玻璃纤维桩的抗折强度无显著性差异（p> 0.05）。结论采用复合树脂桩核结合二硅酸锂陶瓷桩加固喇叭状根管，在单冠修复时，其力学性能优于复合树脂桩核和玻璃纤维桩核，具有上级效果。
PurposeTo examine the fracture strength and fracture mode of flared root canals reinforced with different post and core materials.Materials and methodsForty endodontically treated bovine teeth structured to mimic human mandibular premolars with flared root canals were reinforced with resin composite and glass fiber post (FRC), composite resin (RC), ceramic core (LD), and ceramic core with resin composite reinforcement (RLD), and restored with single zirconia crowns (n = 10 in each group). The fracture strength and mode of the root canals restored with zirconia crown were assessed. The fracture strength was compared with a one‐way analysis of variance (ANOVA) following Tukey HSD tests. A multiple regression analysis was conducted to test the effect of the post/core materials on the fracture loads. Fisher's exact test was used in the failure mode analysis.ResultsThe mean fracture strength of RLD was significantly higher than RC, FRC, and LD (p< 0.05), while no significant differences were found among RC, FRC, and LD (p< 0.05). The regression analysis found that the fracture strength using the lithium disilicate was significantly lower for the post and higher for the core than that using the resin composite (p< 0.05), and there were no significant difference in the fracture strengths between the resin composite and glass fiber used for the post (p> 0.05). Most of the specimens exhibited root fractures, and no significant differences were observed among the groups (p< 0.05).ConclusionsThe results of this study suggest that reinforcement of flared root canals using a combination of resin composite for the core and lithium disilicate ceramic for the post is superior to resin composite and glass fiber in mechanical properties when restoring a single crown.