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首页> 外文期刊>Journal of Biomechanics >The effect of implant number and position on the stress behavior of mandibular implant retained overdentures: A three-dimensional finite element analysis
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The effect of implant number and position on the stress behavior of mandibular implant retained overdentures: A three-dimensional finite element analysis

机译：种植体数量和位置对下颌种植体保留义齿的应力行为的影响：三维有限元分析

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摘要

The present study evaluated the effects of ball anchor abutment attached to implants with a 4.30 mm diameter and 11 mm insert length on stress distribution in a patient without any remaining teeth in the lower jaw. In the study, the stress analysis was performed for five different configurations (2 with 4 implant-supported and 3 with 2 implant-supported) and three different loading types using ANSYS Workbench software. The stresses measured in the 4 implant-supported models were lower compared to the stresses measured in the 2 implant-supported models. The stresses on the implants intensified on the cervical region of the implants. When the effects of the loading sites on the stress were examined, the loading on the first molar tooth produced the highest stresses on the implants. The struggle and desire to esthetically restore the lost body parts is as old as the history of humanity. Restoring the function and esthetics of the lost tissues has been the main focus of scientists for centuries. It has been reported that stone, wood, and even animal teeth have been used as the supportive structure in the maxilla (upper jaw) and mandible (lower jaw) (ME, 1995). The improvements have been made to this approach in dentistry, and implants have been developed and introduced into the practice of dentistry to restore lost functions. The materials used in dental implants vary greatly, along with the multiplicity of models. Experimental and mathematical stress analyses are required to select the appropriate geometry and material of dental implants. Generally, the finite element method is used in mathematical analysis. Barbier et al. evaluated axial and non-axial forces around intraosseous implant systems using the finite element method, and showed the need for reducing horizontal loading (Barbier et al., 1998). Lin et al. used functionally graded material (FGM) and titanium as the implant material and evaluated the distribution of stress on the cortical and trabecular bone in a two dimensional mathematical model, in which FGM was found to have provided more homogeneous stress distribution.
机译：本研究评估了直径为4.30 mm，插入长度为11 mm的植入物所附着的球形锚固基台对患者下颌骨中没有剩余牙齿的应力分布的影响。在研究中，使用ANSYS Workbench软件对五种不同的配置（2种支持4个植入物，而3种支持2种植入物）和三种不同的加载类型进行了应力分析。与在2个植入物支持的模型中测得的应力相比，在4个植入物支持的模型中测得的应力更低。植入物的应力在植入物的子宫颈区域上加剧。当检查负荷部位对应力的影响时，第一颗磨牙的负荷对植入物产生最高的应力。从美学上恢复失去的身体部位的斗争和渴望与人类历史一样悠久。数百年来，恢复丢失组织的功能和美学一直是科学家关注的重点。据报道，石头，木头甚至动物的牙齿已经被用作上颌（上颌骨）和下颌骨（下颌骨）的支撑结构（ME，1995）。已经对这种牙科方法进行了改进，并且已经开发了植入物并将其引入牙科实践中以恢复失去的功能。牙齿植入物所使用的材料以及多种模型相差很大。需要进行实验和数学应力分析，以选择合适的牙科植入物几何形状和材料。通常，有限元法用于数学分析。 Barbier等。有限元方法评估了骨内植入系统周围的轴向和非轴向力，并表明需要减少水平载荷（Barbier等，1998）。 Lin等。我们使用功能梯度材料（FGM）和钛作为植入材料，并在二维数学模型中评估了皮质和小梁骨上的应力分布，发现该模型提供了更均匀的应力分布。

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