ASSOCIATION OF EMG ACTIVITY OF THE LIPS WITH MASTICATORY MUSCLE IN INDIVIDUALS WITH MALOCCLUSION

咬合不正患者嘴唇肌电图活动与咀嚼肌的关联

• 批准号: 14571962
• 负责人: YAMAGUCHI Kazunori
• 金额: $ 2.3万
• 依托单位: KYUSHU DENTAL COLLEGE
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14571962/
• 关键词: LIP SEALING; LOSER LIP; MASSETER MUSCLE; EMG ACTIVITY; INCOMPETENT LIPS; CHEWING; 無力性口唇; オトガイ筋; ガム咀嚼; 咀嚼運動; 運動サイクル

In subjects with competent lips, the lips are lightly closed during chewing food. However, in some patients with incompetent lips, the lips are not always closed during masticatory function. Chewing with the lips closed is an involuntary act in both subjects with incompetent lips and competent lips. In contrast, chewing with the lip closed is not a natural act in subjects with incompetent lips. The purpose of this study was to investigate the relationship between activities of lower lip and masticatory muscles.Results(1)The amplitudes of EMG activity of lower lip during chewing with lip in contact and apart during masseter active and non-active (tonic) contraction phases were significantly higher in the incompetent lip group than in competent lip group.(2)The duration of EMG activity during tonic masseter activity with lip contact was shorter in incompetent lip group than in competent lip group.Our results suggested that failure of lip sealing is probably due to facial morphological disharmony and that such failure also affects the masticatory function.

在有能力的嘴唇的受试者中，在咀嚼食物时嘴唇轻轻闭合。然而，在一些唇功能不全的患者中，唇在咀嚼功能期间并不总是闭合的。在无功能的嘴唇和有功能的嘴唇的受试者中，闭着嘴唇咀嚼是一种无意识的行为。相比之下，在嘴唇功能不全的受试者中，嘴唇闭合咀嚼不是一种自然的行为。结果（1）在咀嚼肌主动和非主动（强直）收缩期，功能不全唇组的下唇肌电活动幅度显著高于功能正常唇组，而在咀嚼肌主动和非主动（强直）收缩期，功能不全唇组的下唇肌电活动幅度显著高于功能正常唇组。（2）唇功能不全组的肌电活动时间短于唇功能正常组，提示唇功能不全可能是由于面部形态不协调造成的，同时也影响了咀嚼功能。

项目成果

Nozomi Tomiyama: "Electromyographic activity of lower lip muscles during chewing with the lips in contact and apart"The Angle Orthodontist. 74-1. 31-36 (2004)

Nozomi Tomiyama：“嘴唇接触和分开咀嚼时下唇肌肉的肌电活动”Angle Orthodontist。

田村仁美: "正常咬合者とClass III不正咬合者の咀嚼運動の比較"九州歯科学会雑誌. 57・5. 153-162 (2004)

田村瞳：“正常咬合与Ⅲ类错牙合患者的咀嚼运动比较”九州牙科学会杂志57・5（2004年）。

Hitomi Tamura, Tosimiti Ichida, Kazunori Yamaguchi: "Masticatory movement of skeletal Class III malocclusion"J Kyushu Dent Soc.. 57-5. 153-162 (2003)

Hitomi Tamura、Tosimiti Ichida、Kazunori Yamaguchi：“骨骼Ⅲ类错牙合畸形的咀嚼运动”J Kyushu Dent Soc.. 57-5。

Fuki Iwahashi: "Activity of the lips associated with simulated upper incisors positions"Orthodontic Waves (English edition). 63・1. 7-14 (2004)

Fuki Iwahashi：“与模拟上切牙位置相关的嘴唇活动”Orthodontic Waves（英文版）63・1（2004）。

冨山 望: "Electromyographic activity of lower lip muscles during chewing with the lips incontact and apart"The Angle Orthodontist. (Accepted).

Nozomi Tomiyama：“嘴唇接触和分开咀嚼时下唇肌肉的肌电活动”Angle Orthodontist（已接受）。