渐进性负荷对种植体周围骨改建影响的三维有限元分析
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烟台市校地融合发展项目(2023XDRHXMPT11)


Effects of Progressive Loading on Peri-Implant Bone Remodeling: A Threee-Dimensional Finite Element Analysis
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    摘要:

    目的 模拟种植体渐进性负荷过程,评估渐进性负荷方式对种植体周骨改建的影响。方法 采用有限元分析结合ANSYS参数化设计语言(ANSYS parametric design language,APDL)程序,计算种植体植入6个月内使用常规负荷(对照组)及渐进性负荷(实验组)的种植体周平均骨密度,观察种植体周围1 mm3感兴趣区域(region of interest,ROI)内骨组织的生物力学作用及骨密度变化。结果 对照组在术后6个月内皮质骨骨密度降低0.19 g/cm3,而实验组仅降低了0.15 g/cm3,松质骨内各区域骨密度在实验组中相比对照组增长0.4 g/cm3。实验组皮质骨内骨密度下降程度小于对照组,松质骨内实验组增长大于对照组。有限元分析实验组等效应力分布范围及最大值(8.9 MPa)明显大于对照组(6.68 MPa)。结论 在种植术后6个月内使用渐进性负荷方式,能够使种植体周围骨组织的应力分布有助于种植体愈合过程中边缘骨组织的稳定。与常规负荷方式相比,渐进性负荷方式下种植体周骨密度增长程度更多,效果优于常规负荷方式。

    Abstract:

    Objective The progressive loading process of implants was simulated, and the influence of progressive loading methods on peri-implant bone reconstruction was evaluated. Methods Using finite element analysis combined with the ANSYS parametric design language (APDL), the average bone density of the peri-implant regions was observed using conventional loading (control group) and progressive loading (experimental group) within six months of implant placement. The biomechanical effects of bone tissues in a 1 mm3 region of interest (ROI) around the implant and variations in bone density were observed. Results Within six months after implantation, the cortical bone density of the control group decreased by 0.19 g/cm3, whereas that of the experimental group decreased by 0.15 g/cm3. The trabecular bone density of each area in the experimental group increased by 0.4 g/cm3 compared with that in the control group. The bone density in the experimental group was lower than that in the control group. The increase in cancellous bone in the experimental group was higher than that in the control group. The finite element analysis revealed that the equivalent stress distribution range and maximum value of the experimental group (8.9 MPa) were significantly higher than those of the control group (6.68 MPa). Conclusions The use of the progressive loading method within six months after implantation was conducive to the distribution of stress on the bone tissues around the implant. This reduced the variation in bone density at the edge of the implant. The peri-implant bone density increased more under progressive loading than under conventional loading. The effect is superior to that of the conventional loading method.

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胡洁羽,贾璐荣,周文娟,柳忠豪.渐进性负荷对种植体周围骨改建影响的三维有限元分析[J].医用生物力学,2024,39(6):1137-1145

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  • 收稿日期:2024-05-28
  • 最后修改日期:2024-07-14
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  • 在线发布日期: 2024-12-25
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