Influence of pharyngeal airway respiration pressure on Class II mandibular retrusion in children: A computational fluid dynamics study of inspiration and expiration
Influence of pharyngeal airway respiration pressure on Class II mandibular retrusion in children: A computational fluid dynamics study of inspiration and expiration
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DOI：
10.1111/ocr.12145
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发表时间：
2017-05-01
影响因子：
3.1
通讯作者：
Yamasaki, Y.
中科院分区：
文献类型：
--
作者：
Iwasaki, T.;Sato, H.;Yamasaki, Y.
目的：采用计算流体动力学（CFD）方法研究咽部气道负压对鼻塞患儿吸气时下颌后缩的影响。（下颌骨重建）和III材料和方法：锥形束计算机断层扫描数据用于重建鼻和咽气道的三维形状。使用CFD模拟气流压力，计算吸气和呼气时的鼻阻力和咽气道压力。II类组鼻阻力明显高于其他两组，和口咽气道吸气压力在II类（-247.64 Pa）组大于I类（-43.51 Pa）和III类（-31.81 Pa）组（P < .001）。结论：安氏Ⅱ类错牙合患儿鼻阻塞引起的咽部气道吸气负压过大可能与其后缩有关。
Objectives: To examine the influence of negative pressure of the pharyngeal airway on mandibular retraction during inspiration in children with nasal obstruction using the computational fluid dynamics (CFD) method.Setting and Sample Population: Sixty-two children were divided into Classes I, II (mandibular retrusion) and III (mandibular protrusion) malocclusion groups.Material and Methods: Cone-beam computed tomography data were used to reconstruct three-dimensional shapes of the nasal and pharyngeal airways. Airflow pressure was simulated using CFD to calculate nasal resistance and pharyngeal airway pressure during inspiration and expiration.Results: Nasal resistance of the Class II group was significantly higher than that of the other two groups, and oropharyngeal airway inspiration pressure in the Class II (-247.64 Pa) group was larger than that in the Class I (-43.51 Pa) and Class III (-31.81 Pa) groups (P < .001). The oropharyngeal airway inspiration-expiration pressure difference in the Class II (-27.38 Pa) group was larger than that in the Class I (-5.17 Pa) and Class III (0.68 Pa) groups (P = .006).Conclusion: Large negative inspiratory pharyngeal airway pressure due to nasal obstruction in children with Class II malocclusion may be related to their retrognathia.