Comparison of Short Implant, Angled Implant, Distal Extension and Grafting Methods for Atrophic Maxillary Posterior Region: a Finite Element Study

IF 1.6 4区 医学 Q4 ENGINEERING, BIOMEDICAL Journal of Medical and Biological Engineering Pub Date : 2024-01-06 DOI:10.1007/s40846-023-00844-6
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Abstract

Purpose

The objective of the study was to determine the most ideal of four different implant-prosthesis treatment combinations that can be used for the posterior maxilla by using the finite element method.

Methods

Among the four models representing the posterior region of the atrophic maxilla, in the first model, a standard implant was installed in the place of tooth 4, while a short implant was inserted in the place of tooth 6 due to increased sinus pneumatization. In the second model, standard implants were placed in tooth 4 and 5 and the implant in tooth 5 was installed with 30° distal inclination so as to tangentially cross the sinus region. In the third model, a graft application was designed for the area with increased sinus pneumatization, and standard implants were inserted in the places of tooth 4 and 6. In the fourth model, two standard implants were placed at teeth 4 and 5 and a distal extension was made in between.

Results

The maximum and minimum principal strain values in cortical bone were obtained as 2594 µε and 5478 µε in Model 4, respectively, and in trabecular bone as 4733 µε and 3761 µε in Model 1. Among the implants and abutments, the highest von Mises stress value of 709 MPa occurred in Model 4.

Conclusions

The third model that features a graft was the most successful model and the fourth model that featured distal extension had the highest likelihood of damage.

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短种植体、成角种植体、远端延伸和移植法治疗萎缩性上颌后区的比较:有限元研究
摘要 目的 研究目的是通过有限元方法确定上颌后部四种不同的种植体-修复体治疗组合中最理想的一种。 方法 在代表萎缩上颌后部的四个模型中,第一个模型在第 4 颗牙的位置安装了标准种植体,而由于上颌窦气化增加,在第 6 颗牙的位置植入了短种植体。在第二个模型中,在第 4 和第 5 个牙齿上安装了标准种植体,第 5 个牙齿上的种植体向远端倾斜 30°,以切向穿过上颌窦区域。在第三个模型中,针对窦气化增加的区域设计了移植应用,并在第 4 和第 6 个牙齿的位置植入了标准种植体。在第四个模型中,在 4 号牙和 5 号牙处植入了两个标准种植体,并在两者之间做了远端延伸。 结果 第 4 个模型中皮质骨的最大和最小主应变值分别为 2594 µε 和 5478 µε,第 1 个模型中骨小梁的最大和最小主应变值分别为 4733 µε 和 3761 µε。在种植体和基台中,模型 4 的 von Mises 应力值最高,达到 709 MPa。 结论 第三种以移植体为特征的模型是最成功的模型,第四种以远端延伸为特征的模型发生损坏的可能性最大。
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来源期刊
CiteScore
4.30
自引率
5.00%
发文量
81
审稿时长
3 months
期刊介绍: The purpose of Journal of Medical and Biological Engineering, JMBE, is committed to encouraging and providing the standard of biomedical engineering. The journal is devoted to publishing papers related to clinical engineering, biomedical signals, medical imaging, bio-informatics, tissue engineering, and so on. Other than the above articles, any contributions regarding hot issues and technological developments that help reach the purpose are also included.
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