不同固位技术修复单侧上颌骨缺损的生物力学研究

发布时间：2018-07-23 17:36

【摘要】：目的采用三维有限元分析方法研究卡环、附着体以及颧种植体3种不同固位技术对上颌骨单侧缺损修复的生物力学影响。方法利用医学图像处理软件Mimics重建单侧缺损上颌骨模型,采用镜像技术生成修复体模型,并建立使用不同固位技术修复的上颌骨有限元模型,模拟口腔咬合状态下上颌骨受力状态。结果采用颧种植体固位修复的上颌骨健侧及修复侧上腭应力最大,分别为7.399、4.864 MPa;而且采用颧种植固位使得健侧及修复侧上颌骨应力最小,分别为10.46和10.86 MPa;颧种植体自身应力也最小,为15.25 MPa。结论不同固位技术修复对单侧上颌骨缺损修复效果影响较大。卡环固位及附着体固位由于带有支架可用于分担作用上腭的力,颧种植体固位可通过传递力至颧骨,故可分担作用于上颌骨的力。
[Abstract]:Objective to study the biomechanical effects of clasp attachment and zygomatic implants on the repair of unilateral maxillary defects by three dimensional finite element analysis. Methods the maxillary model of unilateral defect was reconstructed by medical image processing software Mimics, and the reconstruction model was created by mirror image technique, and the finite element model of maxilla was established with different retention techniques. Simulation of oral occlusal state of maxillary stress state. Results the maxillary stress in the healthy side and the repaired side of the maxilla was the highest, which was 7.399m 4.864 MPa, respectively, and the stress of the healthy side and the repaired side was minimized by using the zygomatic implant retainer. The stress of zygomatic implants was the smallest, 15.25 MPa, and 10.46 MPa and 10.86 MPa, respectively. Conclusion the repair of unilateral maxillary defects with different retentive techniques has a great effect on the repair of unilateral maxillary defects. Because the clamping retainer and attachment retainer can be used to share the force acting on the palate, the zygomatic implant retainer can transfer the force to the zygomatic bone, so it can share the force acting on the maxillary bone.
【作者单位】：北京航空航天大学生物与医学工程学院生物力学与力生物学教育部重点实验室;
【基金】：国家自然科学基金资助项目(11202017) 教育部博士点新教师基金项目(20121102120039) 教育部新世纪优秀人才支持计划项目(NCET-12-0024) 北京市自然科学基金项目(7133245)
【分类号】：R318.01

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