Effect of bone mass density and alveolar bone resorption on stress in implant restoration of free-end edentulous posterior mandible: Finite element analysis of double-factor sensitivity

IF 2 3区 医学 Q2 ANATOMY & MORPHOLOGY
Zhangyan Ye , Hao Ye , Yue Wu , Zhengting Jiang , Huiyu Yao , Xiaomin Xu , Yitian Zhang , Weifeng Du , Wenshan Li , Yuwei Zheng , Pengcheng Ye , Xi Ding , Lijun Wu
{"title":"Effect of bone mass density and alveolar bone resorption on stress in implant restoration of free-end edentulous posterior mandible: Finite element analysis of double-factor sensitivity","authors":"Zhangyan Ye ,&nbsp;Hao Ye ,&nbsp;Yue Wu ,&nbsp;Zhengting Jiang ,&nbsp;Huiyu Yao ,&nbsp;Xiaomin Xu ,&nbsp;Yitian Zhang ,&nbsp;Weifeng Du ,&nbsp;Wenshan Li ,&nbsp;Yuwei Zheng ,&nbsp;Pengcheng Ye ,&nbsp;Xi Ding ,&nbsp;Lijun Wu","doi":"10.1016/j.aanat.2024.152210","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><p><span>Osseous condition of the mandible was regarded as a key factor influencing stability of implants in the early stage. </span>Finite element analysis<span> was used to assess the effect of bone mass density and alveolar bone<span> resorption (double factors) on stress in a four-unit implant restoration of a free-end edentulous posterior mandible.</span></span></p></div><div><h3>Methods</h3><p>A 3D finite element model was constructed for a single-sided free-end edentulous mandible (from mandibular first premolar<span><span> to mandibular second molar) containing threaded dental implants. Mandible sensitivity modes were constructed with different alveolar bone resorption levels for normal conditions as well as mild, moderate and severe </span>periodontitis<span><span>, respectively. Based on the mass density of cancellous bone for four types of bones as the sensitivity parameter, two </span>implant design<span> modes were constructed: Model A (four-unit fixed bridge supported by three implants, implant positions were 34, 36 and 37) and model B: 34 × 36, 37 (37: a single implant crown) (34 × 36: three-unit fixed bridge supported by two implants, implant positions were 34 and 36). A total of 32 sensitivity-based finite element models, grouped in two groups, were constructed. Stress distribution and maximum von Mises stress on cortical bone and cancellous bone around the implant, as well as the surface of implant were investigated by using ABAQUS when vertical loading and 45° oblique loading were applied, respectively.</span></span></span></p></div><div><h3>Results</h3><p>When vertical loading was applied on the implant, maximum von Mises stress on the cortical bone around the implant was assessed to be 4.726 MPa - 13.15 MPa and 6.254 MPa - 13.79 MPa for groups A and B, respectively; maximum stress on the cancellous bone around the implant was 2.641 MPa - 3.773 MPa and 2.864 MPa - 4.605 MPa, respectively; maximum stress on the surface of implant was 14.7 MPa - 21.17 MPa and 21.64 MPa - 30.70 MPa, respectively. When 45° oblique loading was applied on the implant restoration, maximum von Mises stress on the cortical bone around the implant was assessed to be 42.08 MPa - 92.71 MPa and 50.84 MPa - 102.5 MPa for groups A and B, respectively; maximum stress on the cancellous bone around the implant was 4.88 MPa - 25.95 MPa and 5.227 MPa - 28.43 MPa, respectively; maximum stress on the surface of implant was 77.91 MPa - 124.8 MPa and 109.2 MPa - 150.7 MPa, respectively. Stress peak on the cortical bone and that on cancellous bone around the implant increased and decreased with the decrease in bone mass density, respectively. Stress peak on alveolar bone increased with alveolar bone resorption when oblique loading was applied.</p></div><div><h3>Conclusion</h3><p>1. Both alveolar bone resorption and bone mass density (double factors) are critical to implant restoration. Bone mass density may exhibit a more pronounced impact than alveolar bone resorption. 2. From the biomechanical perspective, types I and II bones are preferred for implant restoration, while implantation should be considered carefully in the case of type III bones, or those with less bone mass density accompanied by moderate to severe alveolar bone loss. 3. Splinting crowns restoration is biomechanically superior to single crown restoration.</p></div>","PeriodicalId":50974,"journal":{"name":"Annals of Anatomy-Anatomischer Anzeiger","volume":null,"pages":null},"PeriodicalIF":2.0000,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annals of Anatomy-Anatomischer Anzeiger","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0940960224000025","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ANATOMY & MORPHOLOGY","Score":null,"Total":0}
引用次数: 0

Abstract

Background

Osseous condition of the mandible was regarded as a key factor influencing stability of implants in the early stage. Finite element analysis was used to assess the effect of bone mass density and alveolar bone resorption (double factors) on stress in a four-unit implant restoration of a free-end edentulous posterior mandible.

Methods

A 3D finite element model was constructed for a single-sided free-end edentulous mandible (from mandibular first premolar to mandibular second molar) containing threaded dental implants. Mandible sensitivity modes were constructed with different alveolar bone resorption levels for normal conditions as well as mild, moderate and severe periodontitis, respectively. Based on the mass density of cancellous bone for four types of bones as the sensitivity parameter, two implant design modes were constructed: Model A (four-unit fixed bridge supported by three implants, implant positions were 34, 36 and 37) and model B: 34 × 36, 37 (37: a single implant crown) (34 × 36: three-unit fixed bridge supported by two implants, implant positions were 34 and 36). A total of 32 sensitivity-based finite element models, grouped in two groups, were constructed. Stress distribution and maximum von Mises stress on cortical bone and cancellous bone around the implant, as well as the surface of implant were investigated by using ABAQUS when vertical loading and 45° oblique loading were applied, respectively.

Results

When vertical loading was applied on the implant, maximum von Mises stress on the cortical bone around the implant was assessed to be 4.726 MPa - 13.15 MPa and 6.254 MPa - 13.79 MPa for groups A and B, respectively; maximum stress on the cancellous bone around the implant was 2.641 MPa - 3.773 MPa and 2.864 MPa - 4.605 MPa, respectively; maximum stress on the surface of implant was 14.7 MPa - 21.17 MPa and 21.64 MPa - 30.70 MPa, respectively. When 45° oblique loading was applied on the implant restoration, maximum von Mises stress on the cortical bone around the implant was assessed to be 42.08 MPa - 92.71 MPa and 50.84 MPa - 102.5 MPa for groups A and B, respectively; maximum stress on the cancellous bone around the implant was 4.88 MPa - 25.95 MPa and 5.227 MPa - 28.43 MPa, respectively; maximum stress on the surface of implant was 77.91 MPa - 124.8 MPa and 109.2 MPa - 150.7 MPa, respectively. Stress peak on the cortical bone and that on cancellous bone around the implant increased and decreased with the decrease in bone mass density, respectively. Stress peak on alveolar bone increased with alveolar bone resorption when oblique loading was applied.

Conclusion

1. Both alveolar bone resorption and bone mass density (double factors) are critical to implant restoration. Bone mass density may exhibit a more pronounced impact than alveolar bone resorption. 2. From the biomechanical perspective, types I and II bones are preferred for implant restoration, while implantation should be considered carefully in the case of type III bones, or those with less bone mass density accompanied by moderate to severe alveolar bone loss. 3. Splinting crowns restoration is biomechanically superior to single crown restoration.

骨质密度和牙槽骨吸收对自由端无牙颌后下颌骨种植修复应力的影响:双因素敏感性的有限元分析
背景下颌骨的骨质状况被认为是早期影响种植体稳定性的关键因素。采用有限元分析评估了骨质密度和牙槽骨吸收(双因素)对自由端无牙颌后部四单元种植体修复应力的影响。方法为包含螺纹种植体的单侧自由端无牙颌(从下颌第一前磨牙到下颌第二磨牙)构建了三维有限元模型。在正常情况下,以及在轻度、中度和重度牙周炎情况下,分别构建了不同牙槽骨吸收水平的下颌骨敏感性模式。以四种类型骨骼的松质骨质量密度作为灵敏度参数,构建了两种种植体设计模式:模式 A(由三颗种植体支撑的四单元固定桥,种植体位置分别为 34、36 和 37)和模式 B:34 × 36、37(37:单种植体冠)(34 × 36:由两颗种植体支撑的三单元固定桥,种植体位置分别为 34 和 36)。共构建了 32 个基于灵敏度的有限元模型,分为两组。使用 ABAQUS 对垂直加载和 45° 斜向加载时种植体周围皮质骨和松质骨以及种植体表面的应力分布和最大 von Mises 应力进行了研究。当对种植体施加垂直加载时,A 组和 B 组种植体周围皮质骨的最大 von Mises 应力分别为 4.726 MPa - 13.15 MPa 和 6.254 MPa - 13.79 MPa;种植体周围松质骨的最大应力分别为 2.641 MPa - 3.773 MPa 和 2.864 MPa - 4.605 MPa;种植体表面的最大应力分别为 14.7 MPa - 21.17 MPa 和 21.64 MPa - 30.70 MPa。当对种植体修复体施加 45° 斜向加载时,种植体周围皮质骨的最大 von Mises 应力分别为 42.08 MPa - 92.71 MPa 和 50.84 MPa - 102.5 MPa;种植体周围松质骨的最大应力分别为 4.88 MPa - 25.95 MPa 和 5.227 MPa - 28.43 MPa;种植体表面的最大应力分别为 77.91 MPa - 124.8 MPa 和 109.2 MPa - 150.7 MPa。皮质骨的应力峰值和种植体周围松质骨的应力峰值分别随着骨质密度的降低而升高和降低。在斜向加载时,牙槽骨的应力峰值随着牙槽骨的吸收而增加。牙槽骨吸收和骨密度(双因素)对种植体修复至关重要。骨质密度的影响可能比牙槽骨吸收更明显。2.2. 从生物力学的角度来看,I型和II型骨骼是种植修复的首选,而对于III型骨骼或骨质密度较低并伴有中度至重度牙槽骨缺失的骨骼,则应慎重考虑种植修复。3.夹板冠修复在生物力学上优于单冠修复。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Annals of Anatomy-Anatomischer Anzeiger
Annals of Anatomy-Anatomischer Anzeiger 医学-解剖学与形态学
CiteScore
4.40
自引率
22.70%
发文量
137
审稿时长
33 days
期刊介绍: Annals of Anatomy publish peer reviewed original articles as well as brief review articles. The journal is open to original papers covering a link between anatomy and areas such as •molecular biology, •cell biology •reproductive biology •immunobiology •developmental biology, neurobiology •embryology as well as •neuroanatomy •neuroimmunology •clinical anatomy •comparative anatomy •modern imaging techniques •evolution, and especially also •aging
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信