| Project/Area Number |
26670889
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Orthodontics/Pediatric dentistry
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| Research Institution | Kagoshima University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
IWASAKI Tomonori 鹿児島大学, 医歯学域歯学系, 准教授 (10264433)
KAJI Tatsuru 鹿児島大学, 医歯学域医学系, 准教授 (50315420)
HARADA Mizue 鹿児島大学, 医歯学域医学系, 助教 (20585103)
早崎 治明 新潟大学, 医歯学系, 教授 (60238095)
齊藤 一誠 新潟大学, 医歯学系, 准教授 (90404540)
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| Co-Investigator(Renkei-kenkyūsha) |
KANOMI Ryuzou 鹿児島大学, 医歯学総合研究科, 客員研究員 (70411444)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | airway pressure / 気道 / Class II / 下顎 / 呼吸 / 下顎後退咬合 / 流体解析 |
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| Outline of Final Research Achievements |
This study examined the influence of the negative pressure of the airway on mandibular retraction during inspiration of children with nasal obstruction.
Sixty-two children were divided into Class I, II, and III groups. Airflow pressure was simulated using computational fluid dynamics to calculate nasal resistance and airway pressure during inspiration and expiration. 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 < 0.001). 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 = 0.006). Large negative inspiratory airway pressure due to nasal obstruction in children with Class II malocclusion may be related to their retrognathia.
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