牙科即刻种植中不同螺纹形态及深度设计参数种植体的生物力学性能
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广东省教育厅特色创新项目(2017KTSCX183),广东省科技计划项目(2017A010102017),国家自然科学基金青年基金项目(61603103),江门市创新科研团队引进资助项目(2018630100090019844)


Biomechanical Properties of Implants with Different Thread Shapes and Depths in Dental Immediate Implantation
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    摘要:

    目的 分析牙科即刻种植中不同螺纹形态和螺纹深度种植体周围骨质应力分布情况,为种植体的设计和选择提供依据。方法 利用Geomagic Studio、SolidWorks和ANSYS Workbench建立下颌骨骨块、种植体及下颌磨牙简化模型,施加垂直载荷和斜向载荷,观察不同螺纹形态和螺纹深度的种植体及其周围骨组织应力分布情况。结果 垂直载荷作用下,种植体、皮质骨、松质骨应力峰值变化范围分别为120.51~129.63 MPa、9.94~13.25 MPa、3.92~8.01 MPa,V形、矩形、支撑形、反支撑形种植体周围皮质骨在螺纹深度0.40~0.45 mm范围内应力变化平稳;斜向载荷作用下,种植体、皮质骨、松质骨应力峰值变化范围分别为220.23~286.51 MPa、33.39~45.08 MPa、4.96~12.5 MPa。螺纹深度为0.45 mm,V形、支撑形、反支撑形种植体应力最小。结论 V形、支撑形、反支撑形螺纹种植体选择螺纹深度为0.45 mm,矩形种植体选择螺纹深度0.40 mm,呈现出较好的生物力学特性。

    Abstract:

    Objective To analyze stress distributions of alveolar bone around implants with different types of implant thread shapes and thread depths during dental immediate implantation, so as to provide references for the design and selection of implants. Methods The simplified model of mandible bone block, implants and mandibular molar were established by Geomagic Studio, SolidWorks and ANSYS Workbench, and vertical and oblique loads were applied on this model, respectively. Stress distributions on implants with different thread shape and thread depth as well as alveolar bone around implants were calculated. Results Under vertical loading, the peak stresses of implants, cortical bone and cancellous bone were in the range of 120.51-129.63 MPa, 9.94-13.25 MPa and 3.92-8.01 MPa, respectively. And the stress of cortical bone around V-shaped, rectangular, buttress or reverse buttress implant remained stable in the range of 0.40-0.45 mm thread depth. Under oblique loading, the peak stresses of implants, cortical bone and cancellous bone were in the range of 220.23-286.51 MPa, 33.39-45.08 MPa, 4.96-12.5 MPa, respectively. Among the models, V-shaped, buttress, reverse buttress implant with 0.45 mm thread depth showed the minimum stress. Conclusions The V-shaped, buttress or reverse buttress implant with a thread depth of 0.45 mm, or the rectangular implant with a thread depth of 0.40 mm had better biomechanical properties.

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周钰琳,毛志红,王琼瑶,江励.牙科即刻种植中不同螺纹形态及深度设计参数种植体的生物力学性能[J].医用生物力学,2020,35(1):95-100

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  • 收稿日期:2018-09-15
  • 最后修改日期:2018-10-30
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  • 在线发布日期: 2020-03-03
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