Numerical simulation and functional evaluation of upper airway before and after twin block treatment with different respiratory pathways.

IF 3.1 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Clinical Oral Investigations Pub Date : 2025-09-17 DOI:10.1007/s00784-025-06533-9

Shuai Chen, Yu Han, Jingying Wang, Xue Song

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引用次数: 0

Abstract

Objectives: The aim of this study was to evaluate the changes of upper airway ventilation function in children with mandible retrognathia under different respiratory pathways after Twin Block (TB) using computational fluid dynamics (CFD).

Materials and methods: This study included 20 patients with mandible retrognathia who underwent TB treatment, including 8 males and 12 females (age 10.67 ± 1.51 years). The airflow information obtained by using an oral and nasal thermistor was used as the boundary condition for CFD simulation to analyze the influence of different respiratory paths on upper airway flow.

Results: After TB, the pressure drop, resistance, and shear force in the velopharynx (Vp) and glossopharynx (Gp) were significantly reduced during nasal breathing. Pearson correlation test showed that obstructive apnea index (OAI) was negatively correlated with the internal pressure of the upper airway, and positively correlated with the pressure drop, resistance, and maximum shear force of the upper airway, especially the velopharynx resistance, which showed a significant positive correlation. For patients with obvious oral breathing, the improvement of fluid dynamics parameters inside the glossopharyngeal region was more significant. The OAI was significantly positively correlated with the pressure drop and resistance in the glossopharynx region.

Conclusions: For different respiratory pathways, TB can improve the ventilation function of patients with mandible retrognathia.

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不同呼吸通路双阻塞治疗前后上呼吸道功能的数值模拟与评价。

目的：应用计算流体力学（CFD）方法，评价不同呼吸途径下下颌骨后颌畸形患儿双挡手术（Twin Block， TB）后上呼吸道通气功能的变化。材料与方法：本研究纳入20例接受TB治疗的下颌骨后颌畸形患者，其中男性8例，女性12例，年龄10.67±1.51岁。利用口鼻热敏电阻获得的气流信息作为CFD模拟的边界条件，分析不同呼吸路径对上呼吸道流量的影响。结果：TB患者鼻呼吸时舌咽部（Vp）和舌咽部（Gp）的压降、阻力和剪切力均明显降低。Pearson相关检验显示，阻塞性呼吸暂停指数（OAI）与上气道内压呈负相关，与上气道压降、阻力、最大剪切力，尤其是腭咽阻力呈正相关，呈显著正相关。对于口腔呼吸明显的患者，舌咽部内流体动力学参数的改善更为显著。OAI与舌咽部压降和阻力呈显著正相关。结论：对于不同的呼吸通路，结核可改善下颌骨后缩患者的通气功能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Clinical Oral Investigations 医学-牙科与口腔外科

CiteScore

6.30

自引率

5.90%

发文量

484

审稿时长

3 months

期刊介绍： The journal Clinical Oral Investigations is a multidisciplinary, international forum for publication of research from all fields of oral medicine. The journal publishes original scientific articles and invited reviews which provide up-to-date results of basic and clinical studies in oral and maxillofacial science and medicine. The aim is to clarify the relevance of new results to modern practice, for an international readership. Coverage includes maxillofacial and oral surgery, prosthetics and restorative dentistry, operative dentistry, endodontics, periodontology, orthodontics, dental materials science, clinical trials, epidemiology, pedodontics, oral implant, preventive dentistiry, oral pathology, oral basic sciences and more.