Int J Stomatol

Int J Stomatol ›› 2022, Vol. 49 ›› Issue (1): 48-54.doi: 10.7518/gjkq.2022010

• Orginal Article • Previous Articles     Next Articles

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 E-mail:xwting@mail.nankai.edu.cn;xingyaqin910@163.com

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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


TrendMD: 

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Fig 2

The upper airway model"

Fig 3

The nasal cavity model"

Fig 4

The cross section of mesh at pharyngeal cavity"

Fig 5

The pressure distribution cloud map of inspiratory phase of nasal breathing"

Fig 6

Cross-sectional view of the pressure distribution in the inspiratory phase of nasal breathing"

Fig 7

The pressure distribution cloud map of expiratory phase of nasal breathing"

Fig 8

Cross-sectional view of the pressure distribution in the expiratory phase of nasal breathing"

Fig 9

The pressure distribution by different nasal ventilation of the nasal cavity"

Tab 1

The pressure distribution by different nasal ventilation on the walls of the nasal cavity"
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