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A Three-dimensional Finite Element Analysis of Stress Distribution in Inclined Placed Implants

机译:倾斜放置植入物中应力分布的三维有限元分析

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Introduction: Short implants are considered as a sole option in many patients due to anatomical limitations. It was aimed to assess the functional load stress at implants, surrounding bone and superstructures with different inclination angle. Methods: Seven finite element models with three implants (4 mm × 8 mm) and a separate model with longer implants (4 mm× 10 mm) with an angulation of 37° were designed. The implants were first placed vertically and then angled in distal direction preserving their parallelism increasing 6 ° at each step. Chromium-Cobalt was used to prepare superstructures. Oblique force of 100 N was applied on superstructures. Result: Inclined implant replacement did not significantly increase stress and compressive forces on bone, and the stress on implant surrounding bone decreased as inclination angle increased. On the other hand, in the model with linger implant more homogenous stress distribution was observed and implant’s von Mises values ??decreased. Conclusion: Inclination of implants could have no detrimental effects on bone. Furthermore, inclination of implants provides the opportunity of placing longer implants and also more favorable stress distribution around the implants and in bone.
机译:介绍:由于解剖限制,许多患者的短暂植入物被视为唯一的选择。旨在评估植入物的功能载荷应力,周围骨骼和具有不同倾斜角度的上层建筑物。方法:设计了七种有限元模型,具有三个植入物(4mm×8mm)和具有较长植入物(4mm×10mm)的单独模型,具有37°的角度。植入物首先垂直放置,然后在每个步骤中保持它们的并联性的远端方向上成角度。使用铬 - 钴制备上层建筑。 100 n的倾斜力适用于上层建筑。结果:倾斜的植入物替代物没有显着增加骨骼上的应力和压缩力,并且随着倾斜角度的增加,颈部植入物的应力降低。另一方面,在林带植入物模型中,观察到更加均匀的应力分布,植入物的von ices值减少。结论:植入物的倾向对骨无伤。此外,植入物的倾斜度提供了较长的植入物的机会,并且在植入物和骨骼周围也更有利地应力分布。

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