两种不同固位结构附着体义齿修复游离端缺失基牙及缺牙区牙槽嵴应力分布的比较

目的探讨不同固位结构的附着体义齿应力分布特点,为临床应用附着体义齿种类的选择提供依据。方法应用三维有限元的方法分别测定并比较应用键槽缓冲式附着体和柱状附着体修复下颌单侧游离端缺失基牙及牙槽嵴应力分布情况。结果键槽缓冲式附着体义齿对基牙产生应力值小于柱状附着体义齿,对缺牙区牙槽嵴应力大于柱状附着体义齿。结论键槽缓冲式附着体义齿较适合于基牙条件差的义齿修复,柱状附着体义齿较适合于缺牙区牙槽嵴条件差的义齿修复。

Comparison of abutment and alveolar ridge stress distribution of two kinds of denture retained by attachment prosthodontic distal-extension absence

Objective To analyze the stress distribution of different dentures retained by attachment,and to provide evidence for the selection of dentures retained by attachment type.Methods The three-dimensional finite element was used to comparison abutment and alveolar ridge stress distribution of using trough broken-stress attachment and pole attachment prosthodontic mandibular single distal-extension absence.Results The stress of trough broken-stress denture retained by attachment to abutment is weaker than pole denture retained by attachment's,The stress of trough broken-stress denture retained by attachment to alveolar ridge is stronger than pole denture retained by attachment's.Conclusion Trough broken-stress denture retained by attachment is fit to the situation of abutment is poor,pole denture retained by attachment is fit to the situation of alveolar ridge is poor.