A study of harmony between TMJ morphology and oral function after orthodontic treatment using CT, jaw movement and muscle activity

2017 Fiscal Year Final Research Report

• Project/Area Number: 25463205
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Orthodontics/Pediatric dentistry
• Research Institution: Matsumoto Dental University
• Principal Investigator: YAMADA KAZUHIRO 松本歯科大学, 歯学部附属病院, 教授 (40182521)
• Co-Investigator(Kenkyū-buntansha): 増田 裕次 松本歯科大学, 総合歯科医学研究所, 教授 (20190366) ; 田口 明 松本歯科大学, 歯学部, 教授 (70243582)
• Project Period (FY): 2013-04-01 – 2018-03-31
• Keywords: 矯正治療 / 顎運動 / 顔面形態 / 口唇閉鎖力 / 歯科用CT / 主機能部位 / 解剖学的顆頭点 / 筋活動

Outline of Final Research Achievements

The present study developed the system for integrating morphological coordinates obtained with dental computer tomography and jaw movement coordinates acquired with a mandibular movement measuring device in order to enable multipoint analysis of anatomical condylar movements to be performed. The incisal paths as well as masseter and anterior temporal muscle activity were simultaneously recorded in orthodontic patients to elucidate the adaptation of TMJ after orthodontic treatment. The results suggested that adaptive bone remodeling of the TMJ might occur due to the correction of occlusion and craniofacial morphology in patients with mandibular protrusion and maxillary protrusion. Main occluding area in patients with mandibular protrusion was located in the upper first molar and the lower second molar. Spee curvature related to the posterior slope of articular eminence in the patients with maxillary protrusion.

Free Research Field

歯学・矯正・小児系歯学