钛板重建下颌骨体部缺损的生物力学变化

发布时间：2018-03-20 06:28

本文选题：下颌骨　切入点：钛　出处：《中国组织工程研究》2016年30期 　论文类型：期刊论文

【摘要】：背景:三维有限元在口腔领域应用广泛,但关于下颌骨体部缺损钛板重建的三维有限元研究不多。目的:三维有限元分析钛板重建下颌骨体部缺损的生物力学特点。方法:建立下颌骨体部缺损双皮质钛钉钛板重建的三维有限元模型,模拟正常咬合状态,在右侧下颌骨第一磨牙咬合面中央窝垂直加载200 N的载荷,分析下颌骨、钛钉、钛板的应力分布和最大位移。结果与结论:(1)模拟咀嚼运动加载后下颌骨的应力在下颌体和下颌支部比较集中,其中应力集中比较明显的部位是下颌支的前后缘和下颌骨的下缘,下颌骨后缘的应力小于下颌骨前缘的应力,钛板固定和骨质接触部位也出现应力集中;(2)双皮质钛钉近螺帽处应力值最大,钛钉和钛板接触部位出现应力集中现象;(3)下颌骨升支部钛钉的最大应力值大于缺损前端钛钉最大应力值;(4)钛板的应力集中部位主要为钛钉固定部位,钛板上缘和下缘的应力峰值主要集中在下颌骨缺损前端和钛钉接触区以及下颌骨升支的钛钉接触区;(5)钛板重建下颌骨体部缺损后位移比较容易发生在缺损前端下颌骨和钛板接触部位;(6)结果表明,下颌骨体部缺损双皮质钛钉钛板固定重建相对比较稳定,下颌角前端的钛板比较容易发生断裂。
[Abstract]:Background: 3D finite element is widely used in the field of stomatology. But there are few three-dimensional finite element studies on the reconstruction of mandibular body defect titanium plate. Objective: to analyze the biomechanical characteristics of mandibular body defect reconstruction with titanium plate. Three-dimensional finite element model of titanium plate reconstruction, In order to simulate the normal occlusal state, the first molar of the right mandible was subjected to 200 N vertical loading in the central fossa of the first molar, and the mandible and titanium nail were analyzed. Results and conclusion\\\ the stress of mandible after masticatory movement was concentrated in mandibular body and mandibular branch, and the stress concentration was in the anterior and posterior margin of mandibular branch and lower margin of mandible. The stress of the posterior edge of the mandible was smaller than that of the anterior edge of the mandible, and the stress concentration was also found in the fixation of titanium plate and the contact site of the bone. Stress concentration in the contact site of titanium nail and titanium plate; (3) the maximum stress value of titanium nail in the ascending branch of mandible is greater than the maximum stress value of titanium nail in front end of the defect; (4) the stress concentration position of titanium plate is mainly fixed by titanium nail. The peak stress of the upper and lower edge of titanium plate is mainly concentrated in the front end of mandibular defect and contact area of titanium nail, and the contact area of titanium nail of ascending branch of mandible.) the displacement after reconstruction of mandibular body defect with titanium plate is more likely to occur at the front end of the defect. The results of maxillary contact with titanium plate showed that, The reconstruction of the mandibular body defect was relatively stable, and the titanium plate at the anterior end of the mandibular angle was prone to fracture.
【作者单位】：河北医科大学第二医院口腔颌面外科;
【基金】：河北省卫生厅科研基金项目(20150256)~~
【分类号】：R782.2

【相似文献】