FERRULE DESIGN AND FRACTURE-RESISTANCE OF ENDODONTICALLY TREATED TEETH
FERRULE DESIGN AND FRACTURE-RESISTANCE OF ENDODONTICALLY TREATED TEETH
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DOI：
10.1016/0022-3913(90)90070-s
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发表时间：
1990-05-01
影响因子：
4.6
通讯作者：
ENGELMAN, MJ
中科院分区：
文献类型：
--
作者：
SORENSEN, JA;ENGELMAN, MJ
本研究评估了具有各种套圈设计和冠牙结构数量的无髓牙的抗断裂性。冠缘上方一毫米的冠状牙齿结构大大增加了经过牙髓治疗的牙齿的抗折性，而牙核交界处或冠缘处的反斜角则无效。牙冠边缘轴向牙齿结构的厚度并没有明显提高抗断裂能力。
This study evaluated the fracture resistance of pulpless teeth with various ferrule designs and amounts of coronal tooth structure. One millimeter of coronal tooth structure above the crown margin substantially increased the fracture resistance of endodontically treated teeth, whereas a contrabevel at either the tooth-core junction or the crown margin was ineffective. The thickness of axial tooth structure at the crown margin did not appreciably improve resistance to fracture.