摘要
目的:采用计算机数值模拟方法 ,研究手术辅助上颌骨快速扩弓对鼻腔气流动力学特征的影响。方法 :选择8例上颌骨横向发育不足,伴一侧或双侧后牙反的成人患者进行手术辅助上颌快速扩弓。所有研究对象均在治疗前(T1)、扩弓保持3个月后(T2)拍摄螺旋CT,采用Mimics10.0软件建立上气道三维模型,并利用ANSYS14.0软件系统对三维气道进行网格划分、流场数值模拟以及计算模拟结果的后处理,以获得鼻腔内气流速率、压力,鼻腔各截面面积、鼻腔容积和鼻阻力数据。采用SPSS 16.0软件包中的配对t检验比较T1、T2时期鼻气道气流场参数的改变。结果:扩弓后鼻腔整体流速趋于稳定,流速较治疗前减小;术前鼻腔内多处见湍流形成,而术后则较少见湍流及涡流形成;鼻腔负压绝对值显著减小(P<0.05),鼻腔横截面积及鼻腔容积增加,且鼻阻力显著降低(P<0.05)。结论:手术辅助快速扩弓可对鼻气道形态及气流动力学特征产生一定影响,有利于鼻气道通气功能改善。
PURPOSE： To study the effect of surgically assisted rapid maxillary expansion on nasal airflow dynamics by computer numerical simulation. METHODS： The sample comprised 8 adult patients with maxillary transverse deficiency.They had unilateral or bilateral posterior teeth crossbite. Spiral CT scans were taken before treatment（T1） and 3 months after expansion（T2）. The three-dimensional model of the upper airway was established by using Mimics10.0 software, and the analysis of computational fluid dynamics was simulated by ANSYS14.0 software in order to obtain the airflow velocity,the nasal cavity pressure, the cross-sectional area of nasal cavity, nasal airway volume and resistance. The nasal airflow parameters were analyzed with SPSS16.0 software package for paired t test, respectively. RESULTS： The whole nasal velocity was tended to be stable after expansion, and it decreased significantly compared with that before expansion（ P〈0.05）. There was more turbulent flows formation in the nasal airway preoperatively than postoperatively. The absolute value of nasal negative pressure decreased after expansion（P〈0.05）. The cross-sectional area of nasal cavity and nasal volume increased, while the nasal airway resistance decreased significantly after expansion（ P〈0.05）. CONCLUSIONS： Surgically assisted rapid maxillary expansion has certain effect on nasal airway morphology and airflow dynamics, which is beneficial to the improvement of nasal airway ventilation function.
作者
聂萍
陶丽
孙蕙珺
于倩
朱敏
NIE Ping;TAO Li;SUN Hui-jun;YU Qian;ZHU Min(Department of Oral and Craniomaxillofacial Surgery, Shanghai Ninth People＇s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicin;National Clinical Research Center of Stomatolog;Shanghai Key Laboratory of Stomatology ＆ Shanghai Research Institute of Stomatology. Shanghai 200011, Chin)
出处
《中国口腔颌面外科杂志》
CAS
2018年第3期237-241,共5页
China Journal of Oral and Maxillofacial Surgery
基金
上海交通大学医工(理)交叉基金资助(YG2017QN12)
上海高校青年教师培养资助计划(shjdy029)
关键词
手术辅助上颌快速扩弓
鼻气道
计算流体力学
Surgically assisted rapid maxillary expansion
Nasal airway
Computational fluid dynamics
