下颌骨-种植体三种植体螺钉设计的生物力学分析:有限元研究

Anik Banerjee, Sandeep Choudhury, Masud Rana, Arindam Chakraborty, Abhisek Gupta, A. Chowdhury
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摘要

颞下颌关节置换术(TMJR)是一种外科手术,其成功与否很大程度上依赖于种植体-骨界面的生物力学特性。在这项研究中,我们研究了三种常用的种植体螺纹设计(支撑型、方形和三角形)对下颌骨-种植体结构生物力学性能的影响,目的是改善骨整合。采用有限元方法模拟假体和下颌骨的力学行为,并对颞下颌关节的生物力学进行了研究。在我们的分析中,我们考虑了从0.1到0.5的五个摩擦系数。我们的假设是,在保持牙距、高度和深度不变的情况下改变螺纹形状可以改善种植体周围骨的生物力学环境。我们的研究结果表明,方螺纹设计产生了最高的应力集中,而三角形螺纹设计在种植体周围表现出最有利的应力分布。此外,增加摩擦系数导致种植体和周围骨的应力集中增加。我们的研究结果对不同设计的下颌骨种植体的生物力学性能提供了有价值的见解。他们强调了在TMJR种植体设计中考虑螺纹形状和摩擦系数的重要性。未来的研究应纳入骨的粘弹性特性,以提高有限元分析的准确性。本研究有助于TMJR种植体的优化,最终提高患者的预后。
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Biomechanical Analysis of Mandibular Bone-Implant Construct with Three Implant Screw Design: A Finite Element Study
Temporomandibular joint replacement (TMJR) is a surgical procedure that relies heavily on the biomechanical properties of the implant-bone interface for success. In this study, we investigated the effects of three commonly used implant screw thread designs (buttress, square, and triangle) on the biomechanical performance of the mandibular bone-implant construct, with the aim of improving osseointegration. Using finite element analysis, we simulated the mechanical behavior of the prosthesis and mandible and examined the biomechanics of the temporomandibular joint. We considered five coefficients of friction ranging from 0.1 to 0.5 in our analyses. Our hypothesis was that changing the screw thread shape while keeping the pitch, height, and depth constant could enhance the biomechanical environment at the peri-implant bone. Our results indicate that the square thread design produced the highest stress concentration, while the triangle thread design exhibited the most favorable distribution of stress around the implant. Furthermore, increasing the coefficient of friction led to an increase in stress concentration in the implant and surrounding bone. Our findings offer valuable insights into the biomechanical performance of different screw thread designs in the mandibular bone-implant construct. They highlight the significance of considering screw thread shape and coefficient of friction in TMJR implant design. Future studies should incorporate the viscoelastic properties of bone to improve the accuracy of finite element analysis. This research contributes to the optimization of TMJR implants and ultimately enhances patient outcomes.
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