Effects of dental implant diameter and tapered body design on stress distribution in rigid polyurethane foam during insertion

IF 1.7 4区 医学 Q3 ENGINEERING, BIOMEDICAL
Baixuan Yang , Ainara Irastorza Landa , Peter Heuberger , Heidi-Lynn Ploeg
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Abstract

Anchorage, evaluated by the maximum insertion torque (IT), refers to mechanical engagement between dental implant and host bone at the time of insertion without external loads. Sufficient anchorage has been highly recommended in the clinic. In several studies, the effects of implant diameter and taper body design under external loading have been evaluated after insertion; however, there are few studies, in which their effects on stress distribution during insertion have been investigated to understand establishment of anchorage. Therefore, the objective of this study was to investigate the effects of dental implant diameter and tapered body design on anchorage combining experiments, analytical modeling, and finite element analysis (FEA). Two implant designs (parallel-walled and tapered) with two implant diameters were inserted into rigid polyurethane (PU) foam with corresponding straight drill protocols. The IT was fit to the analytical model (R2 = 0.88–1.0). The insertion process was modeled using explicit FEA. For parallel-walled implants, normalized IT and final FEA contact ratio were not related to the implant diameter while the implant diameter affected normalized IT (R2 = 0.90, p < 0.05, β1 = 0.20 and β2 = 0.93, standardized regression coefficients for implant diameter and taper body design) and final FEA contact ratio of tapered implants. The taper design distributed the PU foam stress further away from the thread compared to parallel-walled implants, which demonstrated compression in PU foam established by the tapered body during insertion.

牙科植入物直径和锥形体设计对插入过程中硬质聚氨酯泡沫应力分布的影响
以最大插入扭矩(IT)来评估的锚固度是指牙科种植体在插入时与主骨之间在无外部负荷的情况下的机械啮合。足够的锚固性在临床上一直备受推崇。在一些研究中,已经评估了种植体直径和锥体设计在插入后外部负荷下的影响;但很少有研究调查它们在插入过程中对应力分布的影响,以了解锚定的建立情况。因此,本研究的目的是结合实验、分析建模和有限元分析(FEA),研究牙科种植体直径和锥体设计对锚固的影响。将两种直径的种植体(平行壁和锥形)植入硬质聚氨酯(PU)泡沫中,并采用相应的直钻方案。IT 与分析模型进行了拟合(R2 = 0.88-1.0)。插入过程采用显式有限元分析建模。对于平行壁种植体,归一化 IT 和最终有限元分析接触比与种植体直径无关,而种植体直径会影响锥形种植体的归一化 IT(R2 = 0.90,p < 0.05,β1 = 0.20 和 β2 = 0.93,种植体直径和锥体设计的标准化回归系数)和最终有限元分析接触比。与平行壁种植体相比,锥形设计使聚氨酯泡沫的应力分布更远离螺纹,这表明锥形体在插入过程中对聚氨酯泡沫产生了压缩。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Medical Engineering & Physics
Medical Engineering & Physics 工程技术-工程:生物医学
CiteScore
4.30
自引率
4.50%
发文量
172
审稿时长
3.0 months
期刊介绍: Medical Engineering & Physics provides a forum for the publication of the latest developments in biomedical engineering, and reflects the essential multidisciplinary nature of the subject. The journal publishes in-depth critical reviews, scientific papers and technical notes. Our focus encompasses the application of the basic principles of physics and engineering to the development of medical devices and technology, with the ultimate aim of producing improvements in the quality of health care.Topics covered include biomechanics, biomaterials, mechanobiology, rehabilitation engineering, biomedical signal processing and medical device development. Medical Engineering & Physics aims to keep both engineers and clinicians abreast of the latest applications of technology to health care.
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