Effect of Different Bone Types on Stress Distribution of Mandibular Double Implants Overdenture by Three-dimensional Finite Element Analysis

doi:10.13701/j.cnki.kqyxyj.2025.05.007

Abstract

Abstract: Objective: To analyze the effects of different bone types on the stress distribution of overdenture supported by mandibular double implants by three-dimensional finite element method. Methods: A mandibular edentulous adult patient was selected and the solid model of mandibular edentulous jaw was created by CBCT, and a three-dimensional finite element model including mandible, implant, Locator attachment, and overdenture was established. The vertical and oblique loading conditions of the model were given to obtain the von Mises stress of the implant system and its supporting bone tissue, and the law of stress distribution was analyzed. Results: (1) The maximum von Mises stress of cortical bone and implant increased with the decrease of cortical bone thickness and cancellous bone mineral density, that was Ⅳ>Ⅲ>Ⅱ>Ⅰ. (2) The maximum von Mises stress of cancellous bone decreased with the weakening of bone, that was Ⅰ>Ⅱ>Ⅲ>Ⅳ. (3) The peak stress of the implant under all working conditions was concentrated in the contact area between the implant and the abutment and the cervical thread at the junction of the implant and cortical bone. (4) The maximum von Mises stress of the implant system and surrounding bone tissue increased significantly under oblique loading. Conclusion: During the restoration of mandibular double implants overdenture, bone type will affect the stress distribution of implant system and supporting bone. With the weakening of bone, the stress of cortical bone and implant increases, while the stress of cancellous bone decreases. Ⅳ bone may increase the risk of implant complications, which is not conducive to improve the long-term stability of the implant.

Key words: implant supported overdenture, bone type, stress distribution, dental implant, finite element analysis

WEI Xing, ZHANG Zhihong. Effect of Different Bone Types on Stress Distribution of Mandibular Double Implants Overdenture by Three-dimensional Finite Element Analysis[J]. Journal of Oral Science Research, 2025, 41(5): 395-399.

References

[1] Visser A, Noorda WD, Linde A, et al. Bar-clip versus magnet-retained auricular prostheses: A prospective clinical study with a 3-year follow-up [J]. J Prosthet Dent, 2020, 124(2):240-247.
[2] Abbasi M, Vinnakota DN, Sankar V, et al. Comparison of stress induced in mandible around an implant-supported overdenture with locator attachment and telescopic crowns-a finite element analysis [J]. Med Pharm Rep, 2020, 93(2):181-189.
[3] Ali Z, Baker SR, Shahrbaf S, et al. Oral health-related quality of life after prosthodontic treatment for patients with partial edentulism: A systematic review and meta-analysis [J]. J Prosthet Dent, 2019, 121(1):59-68.
[4] 张杨,王超,张晓南,等.动态载荷下不同骨质对天然牙-种植体联合修复应力分布的影响[J].华西口腔医学杂志,2015,33(3):286-290.
[5] Azcarate-Velazquez F, Castillo-Oyague R, Oliveros-Lopez LG, et al. Influence of bone quality on the mechanical interaction between implant and bone: A finite element analysis [J]. J Dent, 2019, 88:103161.
[6] Jaffin RA, Kumar A, Berman CL. Immediate loading of dental implants in the completely edentulous maxilla: a clinical report [J]. Int J Oral Maxillofac Implants, 2004, 19(5):721-730.
[7] de Almeida EO, Rocha EP, Freitas AJ, et al. Finite element stress analysis of edentulous mandibles with different bone types supporting multiple-implant superstructures [J]. Int J Oral Maxillofac Implants, 2010, 25(6):1108-1114.
[8] Staedt H, Rossa M, Lehmann KM, et al. Potential risk factors for early and late dental implant failure: a retrospective clinical study on 9080 implants [J]. Int J Implant Dent, 2020, 6(1):81.
[9] Liu J, Pan S, Dong J, et al. Influence of implant number on the biomechanical behaviour of mandibular implant-retained/supported overdentures: a three-dimensional finite element analysis [J]. J Dent, 2013, 41(3):241-249.
[10] Faverani LP, Barao VA, Ramalho-Ferreira G, et al. The influence of bone quality on the biomechanical behavior of full-arch implant-supported fixed prostheses [J]. Mater Sci Eng C Mater Biol Appl, 2014, 37:164-170.
[11] de Almeida EO, Rocha EP, Freitas AJ, et al. Finite element stress analysis of edentulous mandibles with different bone types supporting multiple-implant superstructures [J]. Int J Oral Maxillofac Implants, 2010, 25(6):1108-1114.
[12] Melescanu IM, Marin M, Preoteasa E, et al. Two implant overdenture--the first alternative treatment for patients with complete edentulous mandible [J]. J Med Life, 2011, 4(2):207-209.
[13] Visser A, Raghoebar GM, Meijer HJ, et al. Mandibular overdentures supported by two or four endosseous implants. A 5-year prospective study [J]. Clin Oral Implants Res, 2005, 16(1):19-25.
[14] 左陈启,韦丽萍,黄娜,等.二或四枚种植体支持的Locator覆盖义齿修复五年回顾[J].口腔颌面外科杂志,2016,26(4):274-276.
[15] Grobecker-Karl T, Kafitz L, Karl M. Effect of implant position and attachment type on the biomechanical behavior of mandibular single implant prostheses [J]. Eur J Prosthodont Restor Dent, 2020, 28(4):152-160.
[16] 李希光,郅克谦,高岭,等.基于三维有限元评价种植体不同倾斜角度在上颌后牙区骨量不足的应力分析[J].口腔医学研究,2019,35(7):671-675.
[17] 缑小蕊,周政,姜丹丹,等.种植覆盖义齿修复不同骨质类型的Kennedy Ⅰ类缺失的三维有限元分析[J].口腔医学研究,2020,36(9):855-860.
[18] 王媛,张杨.不同下颌骨密度对4颗种植体支持Locator式覆盖义齿的有限元生物力学分析[J].中国组织工程研究,2022,26(22):3492-3497.
[19] Doganay O, Kilic E. Comparative finite element analysis of short implants with different treatment approaches in the atrophic mandible [J]. Int J Oral Maxillofac Implants, 2020, 35(4):e69-e76.
[20] Rues S, Schmitter M, Kappel S, et al. Effect of bone quality and quantity on the primary stability of dental implants in a simulated bicortical placement [J]. Clin Oral Investig, 2021, 25(3):1265-1272.
[21] Chrcanovic BR, Albrektsson T, Wennerberg A. Bone quality and quantity and dental implant failure: A systematic review and meta-analysis [J]. Int J Prosthodont, 2017, 30(3):219-237.
[22] 周宏志,张可,王学玲,等.不同形态种植体在两种骨质内以不同角度植入的应力分析[J].口腔医学研究,2022,38(2):138-143.
[23] Hu F, Gong Y, Bian Z, et al. Comparison of three different types of two-implant-supported magnetic attachments on the stress distribution in edentulous mandible [J]. Comput Math Methods Med, 2019, 2019:6839517.
[24] 王淑英,江青松,蒋向华,等.钛基台支持的CAD/CAM全瓷单冠不同载荷位置的三维有限元应力分析[J].北京口腔医学,2019,27(2):72-75.
[25] Maeda Y, Horisaka M, Yagi K. Biomechanical rationale for a single implant-retained mandibular overdenture: an in vitro study [J]. Clin Oral Implants Res, 2008, 19(3):271-275.