The Effect of Early Orthodontic Treatment in Children on Crania-Facial Function and Morphology

Research Project

Project/Area Number	05671729
Research Category	Grant-in-Aid for General Scientific Research (C)
Allocation Type	Single-year Grants
Research Field	矯正・小児・社会系歯学
Research Institution	Aichi-Gakuin University
Principal Investigator	IMAMURA Mototaka Aichi-gakuin University, School of Dentistry, Assistant Professor, 歯学部, 講師 (00142563)
Co-Investigator(Kenkyū-buntansha)	KIDA Akinori Aichi-gakuin University, School of Dentistry, Assistant Professor, 歯学部, 講師 (00241141) ONO Toshiaki Aichi-gakuin University, School of Dentistry, Assistant Professor, 歯学部, 講師 (90241140)
Project Period (FY)	1993 – 1994
Project Status	Completed (Fiscal Year 1994)
Budget Amount *help	¥1,800,000 (Direct Cost: ¥1,800,000) Fiscal Year 1994: ¥200,000 (Direct Cost: ¥200,000) Fiscal Year 1993: ¥1,600,000 (Direct Cost: ¥1,600,000)
Keywords	Children / Chewing / E.M.G. / T.M.J. / 顎運動 / 咀嚼運動
Research Abstract	K6 Diagnostic System was used to catch the movement of mandibular. The magnetic sensor was remodeled to fit children's crania-face. And K6 was remodeled to take analog data, for the purpose to record the data of K6 and of E.M.G.at same time. E.M.G.of temporalis and masseter was cached by surface electric sensor, and amplified (Nihon Kouden k.k. : AB-621G), and integrated (Nihon Kouden k.k. : EI-601G). The patient chewed the chewing gum twenty times, and the data of K6 and E.M.G.was recorded by digital data recorder (SONY : PC208A) at same time. These data was transported to personal computer (NEC : PC-9801) and analyzed. The results were followed. 1.In chewing cycle, near the maxim open of mouth, E.M.G.of temporalis was more active than of masseta. 2.Near the I.C.P., E.M.G.of masseta turned to more active. We examined the rotational panoramic X-ray T.M.J.mode photography, for the purpose of evaluate the shape of children's T.M.J.Panoramic X-ray system (Asahi K.K. : Auto 3), and some stage of dry skull was used in this examination. The results were followed. 1.The image of the top of condyle was photographed by the panorama X-ray T.M.J.mode. 2.It is able to use this method, for the purpose of evaluate the shape of children's T.M.J.