Analysis of different occlusal modes and bite force of mandible
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摘要: 为研究在不同咬合方式和不同咬合力下颌骨的受力情况，基于已有的头部CT数据，通过医疗软件Mimics提取下颌骨并建立三维模型，并对下颌骨进行重画网格、构造轮廓线、构造曲面片、构造格栅、拟合曲面等分析. 通过对正常的下颌骨以及3D打印钛合金植入物修复的下颌骨进行对比分析. 研究在不同咬合方式和不同咬合力的情况下，下颌骨的受力情况，分别得到下颌骨不同部位加载下的应力和位移分布情况. 结果表明，在3D打印钛合金植入物修复的下颌骨上加载成年男性前，后牙所能承受的最大咬合力时，下颌骨所受到的应力均小于正常下颌骨所受到的应力.Abstract: In order to study the stress of the mandible under different occlusal methods and different bite forces, based on the existing head CT data, the mandible was extracted through the medical software Mimics and the three-dimensional model was established, and the mandible was analyzed by redrawing the mesh, constructing the contour line, constructing the curved surface, constructing the grille, and fitting the surface. Through to the normal mandible and 3 d printing titanium implant restoration of mandibular were analyzed, and the results show that: in the 3 d printing on the titanium alloy implant restoration of mandibular adult male before and after loading teeth can withstand maximum force, mandibular by stress are less than normal mandible by stress.
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Keywords:
- mandible /
- bite /
- stress /
- numerical analysis
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图 1 头骨导入Mimics三个视图
Figure 1. Skull imports three views of Mimics. (a) elevation; (b) top view; (c) side view
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图 6 下颌骨模型加载方式示意图
Figure 6. Schematic diagram of loading mode. (a) median loading; (b) anterior loading; (c) posterior loading
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图 7 正中加载方式下加载290 N的分析结果
Figure 7. Analysis results of loading 290 N under median loading mode. (a) displacement nephogram; (b) stress nephogram
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图 8 正中加载方式下加载219 N的分析结果
Figure 8. Analysis results of loading 219 N under median loading mode. (a) displacement nephogram; (b) stress nephogram
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图 9 前牙加载方式下加载290 N的分析结果
Figure 9. Analysis results of loading 290 N under the loading mode of anterior teeth. (a) displacement nephogram; (b) stress nephogram
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图 10 前牙加载方式下加载219 N的分析结果
Figure 10. Analysis results of loading 219 N under the loading mode of anterior teeth. (a) displacement nephogram; (b) stress nephogram
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图 11 后牙加载方式下加载460 N的分析结果
Figure 11. Analysis results of loading 460 N under the loading mode of posterior teeth. (a) displacement nephogram; (b) stress nephogram
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图 12 后牙加载方式下加载219 N的分析结果
Figure 12. Analysis results of loading 219 N under the loading mode of posterior teeth. (a) displacement nephogram; (b) stress nephogram
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图 13 正中加载方式下加载290 N的分析结果
Figure 13. Analysis results of loading 290 N under median loading mode. (a) stress nephogram; (b) displacement nephogram
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图 14 正中加载方式下加载219 N的分析结果
Figure 14. Analysis results of loading 219 N under median loading mode. (a) stress nephogram; (b) displacement nephogram
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图 15 前牙加载方式下加载290 N的分析结果
Figure 15. Analysis results of loading 290 N under the loading mode of anterior teeth. (a) stress nephogram; (b) displacement nephogram
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图 16 前牙加载方式下加载219 N的分析结果
Figure 16. Analysis results of loading 219 N under the loading mode of anterior teeth. (a) stress nephogram; (b) displacement nephogram
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图 17 后牙加载方式下加载460 N的分析结果
Figure 17. Analysis results of loading 460 N under the loading mode of posterior teeth. (a) stress nephogram; (b) displacement nephogram
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图 18 后牙加载方式下加载219 N的分析结果
Figure 18. Analysis results of loading 219 N under the loading mode of posterior teeth. (a) stress nephogram; (b) displacement nephogram
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图 19 正常下颌骨和3D打印钛合金受应力的折线图
Figure 19. Normal mandible and 3D printed titanium alloy stress line figure. (a) normal mandible; (b) 3D printed titanium alloy mandible
表 1 食物咬合力大小(kg)
Table 1 Food bite force
压缩饼干 坚果 干枣 硬水果糖 烧饼 苹果 核桃仁 馒头 35.0 25.0 21.9 17.6 14.8 12.0 7.3 3.0 
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表 2 下颌骨各组织力学属性
Table 2 mechanical properties of the mandible tissues
名称 弹性模量E/104 Pa 泊松比γ 骨密质 1.37 0.3 松质骨 0.185 0.3 牙齿 2.0 0.3
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表 3 钛合金性能参数
Table 3 performance parameters of titanium alloy
抗拉强度
Rm/GPa比强度
Po/(N·m−2)密度
ρ/(g·cm3)弹性模量
E/MPa导热系数/
K/(Wm−1K−1)泊松比
μ抗拉强度
Rm/MPa规定非比例延伸
强度Rp/MPa断后伸长率
A(%)断面收缩率
Z(%)1.0 23.5 4.5 1.1 × 105 8.0 0.3 ≥ 895.0 ≥ 825.0 ≥ 10.0 ≥ 25.0
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