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首页> 外文会议>ASME international mechanical engineering congress and exposition >Effect of the Number of Dental Implant Neck Threads in Contact with the Cortical Bone on Interface Stresses Using Finite Element Method
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Effect of the Number of Dental Implant Neck Threads in Contact with the Cortical Bone on Interface Stresses Using Finite Element Method

机译：有限元法研究种植牙与皮质骨的接触对界面应力的影响

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摘要

Dental implants are a valuable, safe and predictable solution for patients suffering from tooth loss. The implant shape plays a great role in the success of dental implant, due to its effect on stress distribution in the surrounding bones. Therefore, optimizing some of implant shape parameters may improve stress distribution and consequently may lead to an increase in implant success rate. In this study, the 3D finite element analysis is used to investigate the influence of the number of threads in the neck of the implant on the implant-cortical bone interface stresses. The stress distribution along the implant-bone interface and their displacements were determined using ABAQUS/CAE 6.10 software. Overall, the stress was highest in the cortical bone at the neck of implant and lowest in the cancellous bone regardless of the number of threads in contact with cortical bone. On the other hand, reducing the number of threads in the neck resulted in a decrease in the developed stresses in both types of bones. The developed stresses around the bones decreased gradually in cortical bones and dramatically in cancellous bones when the number of threads decreased in the neck of implant. The stress reduction between the smooth neck to the fully threaded neck decreased the developed stresses by 24% in the cortical bone. However, due to improve the implant osseointegration, it is recommended to keep one or two threads in the cortical bone.
机译：对于牙齿脱落的患者，牙种植体是一种有价值，安全且可预测的解决方案。由于其对周围骨骼中应力分布的影响，因此植入物形状在牙科植入物的成功中起着重要作用。因此，优化植入物形状参数中的一些可以改善应力分布，因此可以导致植入物成功率的增加。在这项研究中，使用3D有限元分析来研究植入物颈部的螺纹数量对植入物-皮质骨界面应力的影响。使用ABAQUS / CAE 6.10软件确定沿种植体-骨界面的应力分布及其位移。总体而言，无论与皮质骨接触的螺纹数量如何，应力在植入物颈部的皮质骨中最高，而在松质骨中最低。另一方面，减少颈部中的螺纹数导致两种类型的骨骼中所产生的应力减小。当植入物颈部的螺纹数量减少时，在骨周围产生的应力在皮质骨中逐渐降低，而在松质骨中则显着降低。光滑的颈部与全螺纹的颈部之间的应力降低使皮质骨中产生的应力降低了24％。但是，由于改善了植入物的骨整合性，建议在皮质骨中保留一根或两根螺纹。

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