Resistance to fracture of restored endodontically treated teeth.
Resistance to fracture of restored endodontically treated teeth.
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修复经牙髓治疗的牙齿的抗断裂性。
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
L. Tronstad
中科院分区：
文献类型：
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作者：
M. Trope;David O. Maltz;L. Tronstad
摘要对根管治疗后的患牙采用8种不同的修复方法进行修复。用市售的硬固型粘固剂填充铜环，并将牙齿置于粘固剂中至牙骨质-牙釉质接合处的水平。根据修复方法对牙齿进行分组，安装在Instron T.T.机械加工并经受缓慢增加的压缩力直至发生断裂。记录每颗牙齿的断裂力，并比较各组的结果。所有的牙齿都以类似的方式断裂，无论使用何种修复方法。在牙根中准备桩间隙显著削弱了牙齿。用磷酸锌粘固剂粘固钢旁桩并没有显著加强牙齿。在根管和洞壁酸蚀后用复合树脂填充桩间隙和进入洞，比用于修复它们的其他方法更强化牙齿。这一发现可能具有临床重要性，例如在修复根管治疗的年轻牙齿不完整的根形成和广泛的根管。
Abstract Endodontically treated teeth were restored by 8 different methods. Copper rings were filled with commercial hard setting cement and the teeth were placed into the cement to the level of the cemento-enamel junction. The teeth were grouped according to restorative methods, mounted in an Instron T.T. machine and subjected to a slowly increasing compressive force until fracture occurred. The force of fracture for each tooth was recorded and the results in the various groups compared. All teeth fractured in a similar manner, irrespective of restorative method used. Preparation of a post space in the roots significantly weakened the teeth. Cementation of a steel parapost with zinc oxyphosphate cement did not significantly strengthen the teeth. Filling the post space and the access cavity with a composite resin following acid etching of the root canal and cavity walls strengthened the teeth more than other methods used to restore them. This finding may be of clinical importance, for instance in the restoration of endodontically treated young teeth with incomplete root formation and wide root canals.