国际口腔医学杂志 ›› 2019, Vol. 46 ›› Issue (5): 526-531.doi: 10.7518/gjkq.2019087
Chen Xin,Mao Bochun,Lu Yuqing,Dong Bo,Zhu Zhuoli,Yue Li,Yu Haiyang()
摘要:
目的 对比钴铬合金和聚醚醚酮(PEEK)制作的可摘局部义齿支架,对患者基牙、黏膜形变及支架受力的影响。方法 选择肯氏Ⅰ类缺失患者1例,通过锥形束计算机断层(CBCT)扫描、口内石膏模型扫描,EXO-CAD软件设计2种可摘局部义齿,Mimics、Geo-magic studio与Abaqus/CAE软件处理模型进行三维有限元分析。分别对支架加载钴铬合金与聚醚醚酮材料。观察基牙、黏膜形变及支架受力的情况。结果 PEEK支架的基牙最大形变量小于钴铬合金,且均分布于牙槽窝;黏膜最大位移量大于钴铬合金,且均分布于缺牙区远端;支架受力小于钴铬合金,且力的分布更加均匀。结论 对于牙列远中游离缺失的患者,PEEK制作的支架具有一定的保护基牙和牙周膜的作用,并且支架内部的应力更小、更均匀;但其对缺牙区黏膜和牙槽骨的压力更大,不适合黏膜和骨质较差的患者。
中图分类号:
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