Relationship of pharyngeal airway respiration pressure on anteroposterior skeletal patterns of children: A CFD study of expiration and inspiration

2014 Fiscal Year Final Research Report

• Project/Area Number: 25670878
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Orthodontics/Pediatric dentistry
• Research Institution: Kagoshima University
• Principal Investigator: TOMONORI Iwasaki 鹿児島大学, 医歯(薬)学総合研究科, 准教授 (10264433)
• Co-Investigator(Kenkyū-buntansha): YAMASAKI Youichi 鹿児島大学, 医歯学総合研究科, 教授 (30200645) ; KAJI Tatsuru 鹿児島大学, 医歯学総合研究科, 准教授 (50315420) ; HARADA Mizue 鹿児島大学, 医歯学総合研究科, 助教 (20585103)
• Co-Investigator(Renkei-kenkyūsha): KANOMI Ryuzou 鹿児島大学, 医歯学総合研究科, 研究員 (70411444)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: airway pressure / Class II / 漏斗胸

Outline of Final Research Achievements

Introduction: The pharyngeal airway inspiration pressure may influence maxillofacial form. This study tested the null hypothesis that pharyngeal airway respiration pressures in children with malocclusion due to different anterior-posterior skeletal patterns do not differ. Methods: Sixty-two average-FMA-angle children were divided into Class I, Class II, and Class III malocclusion groups. Cone-beam computed tomography data was used to reconstruct 3-dimensional shapes of the nasal and pharyngeal airways. Airflow pressure was simulated using computational fluid dynamics to calculate the pharyngeal airway pressure during inspiration. Results: The pharyngeal 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. Conclusion: The large negative inspiratory pharyngeal airway pressure due to nasal obstruction in Class II children is related to their retrognathia.

Free Research Field

小児歯科