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Optimized Dental Implant Fixture Design for the Desirable Stress Distribution in the Surrounding Bone Region: A Biomechanical Analysis

机译：优化的种植牙固定装置用于周围骨区域中所需的应力分布：生物力学分析

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摘要

The initial stability of a dental implant is known to be an indicator of osseointegration at immediate loading upon insertion. Implant designs have a fundamental role in the initial stability. Although new designs with advanced surface technology have been suggested for the initial stability of implant systems, verification is not simple because of various assessment factors. Our study focused on comparing the initial stability between two different implant systems via design aspects. A simulated model corresponding to the first molar derived from the mandibular bone was constructed. Biomechanical characteristics between the two models were compared by finite element analysis (FEA). Mechanical testing was also performed to derive the maximum loads for the two implant systems. CMI IS-III active (IS-III) had a more desirable stress distribution than CMI IS-II active (IS-II) in the surrounding bone region. Moreover, IS-III decreased the stress transfer to the nerve under the axial loading direction more than IS-II. Changes of implant design did not affect the maximum load. Our analyses suggest that the optimized design (IS-III), which has a bigger bone volume without loss of initial fixation, may minimize the bone damage during fixture insertion and we expect greater effectiveness in older patients.
机译：已知牙植入物的初始稳定性是在插入后立即加载时骨整合的指标。植入物设计在初始稳定性中起着基本作用。尽管已建议采用具有先进表面技术的新设计来提高植入物系统的初始稳定性，但由于各种评估因素，验证并不简单。我们的研究重点是通过设计方面比较两个不同植入系统之间的初始稳定性。构建与下颌骨衍生的第一磨牙相对应的模拟模型。通过有限元分析（FEA）比较了两个模型之间的生物力学特征。还进行了机械测试以得出两个植入系统的最大负载。在周围骨区域中，CMI IS-III活性物质（IS-III）比CMI IS-II活性物质（IS-II）具有更理想的应力分布。而且，IS-III比IS-II在轴向载荷方向上减少了向神经传递的应力。植入物设计的变化不会影响最大负荷。我们的分析表明，优化的设计（IS-III）具有更大的骨量，且不会丢失初始固定装置，可以最大程度地减少固定装置插入过程中的骨损伤，我们希望对老年患者有更大的疗效。

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