国际口腔医学杂志

国际口腔医学杂志 ›› 2022, Vol. 49 ›› Issue (1): 48-54.doi: 10.7518/gjkq.2022010

• 论著 • 上一篇    下一篇

不同鼻通气量硬腭上表面压强分布的有限元研究

谢文婷1,2(),邢雅芹3(),崔洋洋1,闫佳银4,张淋坤1,2   

  1. 1. 天津市口腔医院正畸科 南开大学医学院 天津 300041
    2. 天津市口腔功能重建重点实验室 天津 300041
    3. 国家电网公司北京电力医院 北京 100073
    4. 天津医科大学口腔医学院 天津 300041
  • 收稿日期:2021-06-29 修回日期:2021-09-21 出版日期:2022-01-01 发布日期:2022-01-07
  • 通讯作者: 邢雅芹
  • 作者简介:谢文婷,医师,硕士,Email： xwting@mail.nankai.edu.cn
  • 基金资助:
    天津市卫生健康科技项目(ZC20146)

Finite element analysis of pressure distribution on the upper surface of the hard palate with different nasal ventilation

Xie Wenting1,2(),Xing Yaqin3(),Cui Yangyang1,Yan Jiayin4,Zhang Linkun1,2   

  1. 1. Dept. of Orthodontics, Tianjin Stomatological Hospital, School of Medicine, Nankai University, Tianjin 300041, China
    2. Tianjin Key Laboratory of Oral and Maxillofacial Function Reconstruction, Tianjin 300041, China
    3. Beijing Electric Power Hospital, State Grid Corporation of China, Beijing 100073, China
    4. School of Stomatology, Tianjin Medical University, Tianjin 300041, China Foundation:This study was supported by Tianjin Health Science and Technology Project (ZC20146).
  • Received:2021-06-29 Revised:2021-09-21 Online:2022-01-01 Published:2022-01-07
  • Contact: Yaqin Xing

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摘要： 目的 通过测定不同鼻通气量硬腭上表面的压强,分析口呼吸对腭盖下降及错𬌗畸形影响的机制。方法 利用锥形束计算机断层扫描（CBCT）数据和有限元相关软件重建1名健康志愿者的上气道及鼻腔三维模型,并修复空洞、平滑模型、网格划分后进行不同呼吸方式下的边界条件设定和数值模拟。结果 成功建立健康人鼻呼吸上气道模型及鼻腔模型,获取了鼻呼吸的吸、呼两相上气道及不同截面的压力云图和不同鼻通气量吸、呼两相压力云图,计算得到不同鼻通气量时硬腭上表面的压强。结论 随着鼻通气量的减小,吸气相气流对硬腭上表面压强逐渐增大,呼气相气流对硬腭上表面压强逐渐减小。二者均逐渐接近大气压。吸、呼两相鼻腔内压强梯度均逐渐减小。

关键词: 鼻呼吸, 口呼吸, 计算流体力学, 压强, 硬腭

Abstract: Objective This study aims to analyze the mechanism of the effect of mouth breathing on hard palate descent and malocclusion by measuring the pressure of the upper surface of the hard palate with different nasal ventilation.Methods The three-dimensional models of the upper airway and nasal cavity of the healthy volunteer were reconstruc-ted by using cone beam computed tomography data and finite element software. The boundary conditions and numerical simulations were set under different breathing patterns after repairing the cavities, smoothing the model, and meshing.Results The upper airway and nasal cavity models of the healthy volunteer were established. Moreover, the pressure distribution cloud maps of inspiratory and expiratory of nasal breathing at different cross-sections of the upper airway and those of different nasal ventilation were obtained. The pressure on the upper surface of the hard palate with different nasal ventilation was also calculated.Conclusion With the decrease of nasal ventilation, the pressure of inspiratory airflow on the upper surface of the hard palate increased gradually, whereas that of expiratory decreased gradually. Both were getting closer to atmospheric pressure. The pressure gradient in the nasal cavity of inspiratory and expiratory decreased gradually.

Key words: asal breathing, mouth breathing, computational fluid dynamics, pressure, hard palate

Fig 1

Pharyngeal cavity area 左：上气道模型;右：鼻腔模型。图 1 咽腔面积"

图2

上气道模型 左：侧面观;右：正面观。"

图3

鼻腔模型 左：侧面观;右：正面观。"

图4

咽腔处网格横截面"

图5

鼻呼吸吸气相压力分布云图 左：侧面观;右：正面观。"

图6

鼻呼吸吸气相压力分布截面图 左：过鼻根点冠状面;中：截面1后20 mm;右：截面1后40 mm。"

图7

鼻呼吸呼气相压力分布云图 左：侧面观;右：正面观。"

图8

鼻呼吸呼气相压力分布截面图 左：过鼻根点冠状面;中：截面1后20 mm;右：截面1后40 mm。"

图 9

不同鼻通气量时鼻腔压强分布 a~c：吸气相;d~f：呼气相。"

表1

不同鼻通气量在硬腭.上表面产生的压强"
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