螺纹深度对支抗微种植体和颌骨影响的三维有限元分析
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摘要
目的分析螺纹深度变化对微种植体及颌骨上的应力分布和位移的影响,为支抗微种植体的临床选择和优化设计提供理论参照。方法运用Pro/E软件建立不同螺纹深度的微种植体和下颌骨三维有限元模型,用Hypermesh软件对该模型进行网格划分,并在微种植体顶部施加与颌骨面平行的正畸力2.94 N,用ANSYS软件进行三维模拟计算。结果微种植体-骨界面应力峰值集中在骨密质内,当螺纹深度为0.3 mm时,微种植体颈部及其相邻颌骨面的Von-mises应力峰值最小,为18.12 MPa;螺纹深度为0.4 mm时,应力峰值最大,为60.28MPa。结论螺纹深度影响微种植体和颌骨的应力分布,在本实验条件下,螺纹深度为0.3 mm时,微种植体-骨界面、微种植体上的应力和位移分布最优。
Objective In this work, we aimed to analyse the influence of microimplant thread depth on stress and displacement distribution on microimplant and mandible and apply the theoretical reference in choosing orthodontic anchorage microimplant and optimising its design. Methods The 3D finite element models of the microimplants with different thread depths and mandibles were established using Pro/E. The elements were divided using Hypermesh, and results were calculated using the ANSYS software. The force of 2.94 N which was parallel to the mandible surface was applied on the top of the microimplant. Results The maximum Von-mises stress on the microimplant-bone interface focused on the cortical bone. The model with thread depth of 0.3 mm had the smallest Von-mises stress peak of 18.12 MPa on the microimplant neck and its nearby bone, whereas the largest Von-mises stress peak of 60.28 MPa occurred in the model with the thread depth of 0.4 mm. Conclusion The microimplant thread depth influenced the stress distribution on the microimplant and mandible. The stress and displacement distributions on microimplant-bone interface and microimplant were at the optimum when the tread depth was 0.3 mm among all the cases mentioned in this work.
Objective In this work, we aimed to analyse the influence of microimplant thread depth on stress and displacement distribution on microimplant and mandible and apply the theoretical reference in choosing orthodontic anchorage microimplant and optimising its design. Methods The 3D finite element models of the microimplants with different thread depths and mandibles were established using Pro/E. The elements were divided using Hypermesh, and results were calculated using the ANSYS software. The force of 2.94 N which was parallel to the mandible surface was applied on the top of the microimplant. Results The maximum Von-mises stress on the microimplant-bone interface focused on the cortical bone. The model with thread depth of 0.3 mm had the smallest Von-mises stress peak of 18.12 MPa on the microimplant neck and its nearby bone, whereas the largest Von-mises stress peak of 60.28 MPa occurred in the model with the thread depth of 0.4 mm. Conclusion The microimplant thread depth influenced the stress distribution on the microimplant and mandible. The stress and displacement distributions on microimplant-bone interface and microimplant were at the optimum when the tread depth was 0.3 mm among all the cases mentioned in this work.
引文
[1]邵雯婷,王学金.正畸微种植体支抗稳定性研究方法现状[J].口腔医学研究,2016,32(10):1106-1109.Shao WT,Wang XJ.Status of research methods on the stability of micro-implants as orthodontic anchorage[J].J Oral Sci Res,2016,32(10):1106-1109.
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[8]Abuhussein H,Pagni G,Rebaudi A,et al.The effect of thread pattern upon implant osseointegration[J].Clin Oral Implants Res,2010,21(2):129-136.
[9]Chowdhary R,Halldin A,Jimbo R,et al.Evaluation of stress pattern generated through various thread designs of dental implants loaded in a condition of immediately after placement and on osseointegration:an FEA study[J].Implant Dent,2013,22(1):91-96.
[10]Mischkowski RA,Kneuertz P,Florvaag B,et al.Biomechanical comparison of four different miniscrew types for skeletal anchorage in the mandibulo-maxillary area[J].Int J Oral Maxillofac Surg,2008,37(10):948-954.
[11]周栾慧,杨四维,黄跃,等.植入角度及深度对种植体支抗稳定性影响的三维有限元研究[J].口腔医学,2010,30(8):488-490.Zhou LH,Yang SW,Huang Y,et al.3D-FE study of implant anchorage stability under effects of inserting angulation and depth[J].Stomatology,2010,30(8):488-490.
[12]Lin TS,Tsai FD,Chen CY,et al.Factorial analysis of variables affecting bone stress adjacent to the orthodontic anchorage mini-implant with finite element analysis[J].Am J Orthod Dentofacial Orthop,2013,143(2):182-189.
[13]曾婷艳,黄生高.种植体支抗稳定性的三维有限元分析[J].国际口腔医学杂志,2018,45(1):112-118.Zeng TY,Huang SG.A three-dimensional finite element analysis for stability of mini-implant anchorage[J].Int J Stomatol,2018,45(1):112-118.
[2]Favero L,Giagnorio C,Cocilovo F.Comparative analysis of anchorage systems for micro implant orthodontics[J].Prog Orthod,2010,11(2):105-117.
[3]林东,林珊,陈江,等.不同螺纹深度微小种植体的生物力学三维有限元研究[J].福建医科大学学报,2009,43(5):381-383.Lin D,Lin S,Chen J,et al.A three-dimensional finite element analysis on the influence of different depth of thread on biomechanical properties of micro-implant-bone interface[J].J Fujian Med Univ,2009,43(5):381-383.
[4]颜丹,王建国,张锡忠.不同骨内段直径对支抗微种植体和颌骨表面影响的三维有限元分析[J].天津医药,2013,41(1):22-25,97.Yan D,Wang JG,Zhang XZ.Three-dimensional finite element analysis for the influence of micro-implant endosteal diameter on micro-implant and surface of mandibular[J].Tianjin Med J,2013,41(1):22-25,97.
[5]Tada S,Stegaroiu R,Kitamura E,et al.Influence of implant design and bone quality on stress/strain distribution in bone around implants:a 3-dimensional finite element analysis[J].Int J Oral Maxillofac Implants,2003,18(3):357-368.
[6]Duaibis R,Kusnoto B,Natarajan R,et al.Factors affecting stresses in cortical bone around miniscrew implants:a three-dimensional finite element study[J].Angle Orthod,2012,82(5):875-880.
[7]Sebbar M,Bourzgui F,Badre L,et al.Anchorage miniscrews:a histologic study of peri-implant soft tissue[J].Int Orthod,2012,10(1):85-95.
[8]Abuhussein H,Pagni G,Rebaudi A,et al.The effect of thread pattern upon implant osseointegration[J].Clin Oral Implants Res,2010,21(2):129-136.
[9]Chowdhary R,Halldin A,Jimbo R,et al.Evaluation of stress pattern generated through various thread designs of dental implants loaded in a condition of immediately after placement and on osseointegration:an FEA study[J].Implant Dent,2013,22(1):91-96.
[10]Mischkowski RA,Kneuertz P,Florvaag B,et al.Biomechanical comparison of four different miniscrew types for skeletal anchorage in the mandibulo-maxillary area[J].Int J Oral Maxillofac Surg,2008,37(10):948-954.
[11]周栾慧,杨四维,黄跃,等.植入角度及深度对种植体支抗稳定性影响的三维有限元研究[J].口腔医学,2010,30(8):488-490.Zhou LH,Yang SW,Huang Y,et al.3D-FE study of implant anchorage stability under effects of inserting angulation and depth[J].Stomatology,2010,30(8):488-490.
[12]Lin TS,Tsai FD,Chen CY,et al.Factorial analysis of variables affecting bone stress adjacent to the orthodontic anchorage mini-implant with finite element analysis[J].Am J Orthod Dentofacial Orthop,2013,143(2):182-189.
[13]曾婷艳,黄生高.种植体支抗稳定性的三维有限元分析[J].国际口腔医学杂志,2018,45(1):112-118.Zeng TY,Huang SG.A three-dimensional finite element analysis for stability of mini-implant anchorage[J].Int J Stomatol,2018,45(1):112-118.
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