| 不同长度的玻璃纤维桩修复对下颌前磨牙抗折强度的影响 |
| 投稿时间：2010-12-15 修订日期：2011-01-07 点此下载全文 |
| 引用本文：李张维,吴妹娟,刘雪云,潘宣,李梁.不同长度的玻璃纤维桩修复对下颌前磨牙抗折强度的影响[J].医学研究杂志,2011,40(8):111-113 |
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| 中文摘要:目的比较玻璃纤维桩长度对牙齿抗折强度的影响。方法选择30颗近期因正畸完整拔除的下颌前磨牙，自釉牙骨质界处截冠后行完善的根管治疗，随机分为A、B、C 3组，每组10颗。对应每组按5mm（短于修复体牙冠的长度），7mm（等于修复体牙冠的长度），9mm（大于修复体牙冠的长度）长度的纤维桩修复，树脂核加金属冠修复外形。自凝塑料包埋后，固定于万能试验机上测试实验牙的抗折强度，记录读数并观察修复体折裂模式。结果A组的修复体抗折强度低于B组与C组（P＜0.05），而B组与C组修复体抗折强度的差异无统计学意义（P＞0.05）。结论使用玻璃纤维桩修复缺损牙体时，桩的长度不应短于临床牙冠的长度。 |
| 中文关键词:玻璃纤维桩 纤维桩长度 抗折强度 折裂模式 |
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| Effects of Fracture Resistance on Mandible Premolars Restored with Different Glass Fiber Post Lengths |
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| Abstract:ObjectiveTo compare the influence of different glass-fiber post lengths on teeth fracture resistance.Methods Thirty extracted human mandible premolars were endodontically treated after being cut off the crowns from the cemento-enamel junction.The teeth were randomly and equally divided into A,B,C groups which were post lengths of 5mm (shorter than 1/1 clinical crown length),7mm (1/1 clinical crown length),and 9mm (longer than 1/1 clinical crown length) respectively.And then,all of them were restored with resin cores and metal crowns.All the teeth were fixed in a universal text machine after embedded in acrylic resin blocks,which were tested for the fracture resistance,and recorded the counts and observed the fracture mode.ResultsFracture resistance of group A of restoration was significantly lower than that of B group and C group （P＜0.05）.Fracture resistances of group B and C,however,were not significantly different（P＞0.05）. ConclusionGlass fiber post lengths should not be shorter than clinical crowns when we use them to restore dental defects. |
| keywords:Glass fiber post Fiber post length Fracture resistance Fracture mode |
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