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首页> 外文会议>Cairo International Biomedical Engineering Conference >The influence of bar position on implant-retained mandibular overdenture a three dimensional finite element analysis
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The influence of bar position on implant-retained mandibular overdenture a three dimensional finite element analysis

机译：杆位置对种植体固位下颌覆盖义齿的影响三维有限元分析

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To evaluate the effect of bar position in implant-retained mandibular overdenture on stress distribution induced in bone surrounding the implant, a three dimensional (3D) model is designed by simulating an edentulous mandible, restored with mandibular overdenture and retained by 4 widely separated implants. All parameters were fixed except for the position of the bar segments. Vertical and oblique loads were applied on one working side. The stress distribution around the implants in each case was recorded and compared to correlate the induced stress magnitude to the bar structure. Stress distribution induced in the bone surrounding the implants showed minimal changes under the application of vertical loads, while under oblique load, connecting the two anterior implants, resulted in a better stress distribution. Using a one piece bar connection or two pieces bar connection of the four widely separated implants might lead to posterior buccal bone resorption in the working side as the stresses induced bypassed the bone yield strength.
机译：为了评估种植体固位的下颌覆盖义齿中的条形位置对种植体周围骨中诱导的应力分布的影响，通过模拟无牙颌，并用下颌覆盖义齿修复并由4个彼此分开的种植体进行保留，设计了三维（3D）模型。除钢筋段的位置外，所有参数都是固定的。在一个工作侧施加垂直和倾斜载荷。记录每种情况下植入物周围的应力分布，并进行比较，以将感应应力大小与钢筋结构关联起来。在垂直载荷的作用下，植入物周围的骨中引起的应力分布显示出最小的变化，而在倾斜载荷下，连接两个前部植入物，导致了更好的应力分布。使用四个或四个分开的种植体的单杆连接或两杆连接可能会导致工作侧后颊骨吸收，因为所产生的应力会绕过骨屈服强度。

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