What kind of influence does the lips dysrhaphic state in children have on kinetics of chewing and swallowing?

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K20650
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Orthodontics/Pediatric dentistry
• Research Institution: Kagoshima University
• Principal Investigator: MORIZONO Ken 鹿児島大学, 医歯学域歯学系, 助教 (00759938)
• Research Collaborator: YAMASAKI Youichi 鹿児島大学, 医歯学域歯学系, 教授 (30200645) ; IWASAKI Tomonori 鹿児島大学, 医歯学域歯学系, 准教授 (10264433) ; TAKEMOTO Yoshihiko 鹿児島大学, 医歯学域歯学系, 助教 (70452943) ; MURAKAMI Daisuke 鹿児島大学, 医歯学域附属病院, 助教 (80611798)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 嚥下 / 咀嚼 / 小児 / 口唇閉鎖不全

Outline of Final Research Achievements

The purpose of this study was to evaluate the movement of the lips in swallowing objectively using simple and less-invasive method, Motion capture system. Nine healthy males were instructed to swallow a mouthful of 5 mL and 20 mL water samples at a self-decided time. Reflective markers were attached to the right and left corners of the mouth to measure the distance between them and tongue pressure was simultaneously recorded. The maximum tongue pressure, the maximum change of distance between the corners of mouth, and the interval between lip action and tongue action (lip-tongue interval) were calculated. Maximum tongue pressure did not differ significantly between volumes. The change of distance between the corners of mouth was larger, and lip-tongue interval was significantly shorter, with the larger volume of a mouthful. These results indicate that the lip movement during swallowing was able to be evaluated quantitatively.

Free Research Field

小児歯科