Coordinated movements of the mandibular condyle and the articular disk in decreased occlusal vertical dimension in rabbit.

兔下颌骨髁和关节盘在咬合垂直尺寸减小时的协调运动。

• 批准号: 20791599
• 负责人: MORITA Takumi
• 金额: $ 2万
• 依托单位: Aichi Gakuin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20791599/
• 关键词: 顎関節症; 下顎頭; 関節円板; 咬合高径; 顎運動; ウサギ; 外側翼突筋; 咬筋; 筋電図; 顎関節

In decreased occlusal vertical dimension, jaw movement and electromyogram activity were recorded. And we studied the relation between movements of the mandibular condyle and alteration of occlusion. The experiment which after cut the articular tubercle visualizes stress as mandibular condyle movement in the articular tubercle direction was conducted as preliminary step for investigate influence of cut the molar region. In tubercle cutting side was working side case, modification in the movement caused as project forward in occlusal phase. Additionally, trajectory of motion shifted in an anterosuperior direction in the period when activity of the jaw closing muscle does not occur as opening phase. This shows that articular tubercle received stress by resting tension of jaw closing muscle and elastic force of skin. Moreover when cut the molar region on the ipsilateral side, project forward movement in occlusal phase and trajectory of motion forward shift increased. This suggest that stress for articular tubercle increased.Pathogenesis of temporomandibular disorder is considered multifactor, for example, occlusal abnormality, increase in muscle tone, lifestyle habit, mental stress. However, abnormal stress loading and abnormal jaw movement are essential for morphological defect of temporomandibular joint and abnormal position of articular disk.This studies are expected to play an important role in revealing the pathogenesis of anterior dislocation of articular disk.

在咬合垂直尺寸降低时，记录了下颌运动和肌电图活性。我们研究了下颌con的运动与遮挡的改变之间的关系。切割关节结节后的实验可视化应力，因为在关节结节方向上的下颌con运动是作为研究切割摩尔区域的影响的初步步骤。在结节切割侧是有效的侧面案例，在咬合阶段向前导致运动引起的运动修改。此外，在颌骨关闭肌肉的活性不会作为开放阶段发生时，运动的轨迹沿前层方向移动。这表明关节结节通过使颌骨闭合肌肉和皮肤弹性力的张力减​​轻压力。此外，当切割同侧的摩尔区域时，在咬合相和运动前进轨迹的轨迹向前运动增加。这表明关节结节的压力会增加。颞下颌疾病的对照被认为是多因素的，例如，咬合异常，肌肉张力的增加，生活方式习惯，精神压力。然而，异常的应激载荷和异常的下颌运动对于颞下颌关节的形态缺陷和关节盘的异常位置至关重要。这项研究预计将在揭示关节盘前脱位的发病机理中起重要作用。

项目成果

ウサギ咀嚼様運動における関節結節削除時の下顎頭運動への影響について

兔咀嚼样运动过程中关节结节切除对下颌髁突运动的影响

• 发表时间: 2009
• 作者: 伊東優;森田匠;丸尾尚伸;松永知子;栗田賢一;後藤滋巳;平場勝成
• 通讯作者: 平場勝成

Movement of the mandibular condyle and activity of the masseter and lateral pterygoid muscles during masticatory-like jaw movements induced by electrical stim ulation of the cortical masticatory area of rabbits

电刺激兔皮质咀嚼区引起的咀嚼样下颌运动期间下颌髁突的运动以及咬肌和翼外肌的活动

• 发表时间: 2008
• 期刊: Archives of Oral Biology 53
• 作者: Takumi Morita;Takuya Fujiwara;Takefumi Negoro;Chikayuki Kurata Hisanobu Maruo;Kenichi Kurita;Shigemi Goto;Katsunari Hiraba
• 通讯作者: Katsunari Hiraba

ウサギ咀嚼様運動中の片側咬合挙上による関節円板の異常運動の作業側と平衡側の比較

兔子咀嚼样运动时单侧牙合抬高导致关节盘异常运动的工作侧与平衡侧比较

• 发表时间: 2008
• 作者: 丸尾尚伸;森田匠;藤原琢也;根来武史;後藤滋巳;栗田賢一;平場勝成
• 通讯作者: 平場勝成

関節結節削除前後のウサギ下顎頭運動の変化

关节结节切除前后家兔下颌骨髁突运动的变化

• 发表时间: 2010
• 作者: 伊東優;森田匠;松永知子;丸尾尚伸;栗田賢一;平場勝成
• 通讯作者: 平場勝成

Disk movements during fictive mastication under bite-raised condition in rabbits.

兔子在咬合条件下虚拟咀嚼过程中的椎间盘运动。

• 发表时间: 2008
• 作者: Takumi Morita;Hisanobu Maruo;Takuya Fujiwara;Takefumi Negoro;Kenichi Kurita;Shigemi Goto;KatsunariH iraba
• 通讯作者: KatsunariH iraba