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学科主题: 口腔医学
题名:
The electromyographic activity of masseter and anterior temporalis during orofacial symptoms induced by experimental occlusal highspot
作者: Li, J.1; Jiang, T.1; Feng, H.1; Wang, K.2; Zhang, Z.1; Ishikawa, T.3
关键词: experimental orofacial pain ; electromyographic activity ; occlusal interference ; masticatory function ; humans
刊名: JOURNAL OF ORAL REHABILITATION
发表日期: 2008-02-01
DOI: 10.1111/j.1365-2842.2007.01750.x
卷: 35, 期:2, 页:79-87
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Dentistry, Oral Surgery & Medicine
研究领域[WOS]: Dentistry, Oral Surgery & Medicine
关键词[WOS]: EXPERIMENTAL MUSCLE PAIN ; HUMAN MASTICATORY MUSCLES ; JAW-CLOSING MUSCLES ; INTERCUSPAL INTERFERENCE ; TRAUMATIC OCCLUSION ; DISORDERS ; CONTACTS ; DYSFUNCTION ; HUMANS ; SPLINT
英文摘要:

The aim of the present study was to investigate the short-term impact of an occlusal highspot on the occurrence of orofacial symptoms by collecting self-evaluation and using electromyography (EMG) evaluation. A rigid unilateral intercuspal occlusal highspot (A cast onlay of 0.5 mm) was placed on the right lower first molar of six adult volunteers (three males, three females), and remained for 6 days. Continuously all the induced orofacial symptoms were collected and the subjects scored the orofacial pain on a 10-cm visual analogue scale (VAS) during the placement of onlay. The surface EMG was recorded before the placement of onlay, during (on the 3rd and 6th day) and after the onlay was removed. Then the contractile symmetry of bilateral masseter (MAL, MAR) and anterior temporalis (TAL, TAR) was measured by using an asymmetry index. On the 3rd day of the placement of the occlusal highspot, all subjects complained of headache in right temporal region (mean-VAS +/- s.d. = 3.7 +/- 0.5); the activity of TAR at rest position of mandible increased significantly (P = 0.027). In addition, on the 3rd and 6th day with the highspot the EMG activity of the tested muscles during maximal voluntary contraction (MVC) was significantly reduced; the asymmetry index of bilateral anterior temporalis during MVC was increased significantly (P-3rd = 0.028; P-6th = 0.046). A unilateral occlusal highspot may make the ipsilateral anterior temporalis become tenser at rest position. Furthermore, the activity of bilateral anterior temporalis becomes more unsymmetrical during MVC although there are inter-individual differences between subjects. The changes in muscular activity may have some relationship with the occurrence of tension-type headache in temporal region.

语种: 英语
WOS记录号: WOS:000252261600001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/54567
Appears in Collections:北京大学口腔医学院_口腔修复科_期刊论文

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作者单位: 1.Peking Univ, Sch Stomatol, Dept Prosthodont, Beijing 100081, Peoples R China
2.Univ Aalborg, Orofacial Pain Lab, Ctr Sensory Motor Interact, Aalborg, Denmark
3.Tokyo Dent Coll, Oral Hlth Sci Ctr, Brain Res Lab, Chiba, Japan

Recommended Citation:
Li, J.,Jiang, T.,Feng, H.,et al. The electromyographic activity of masseter and anterior temporalis during orofacial symptoms induced by experimental occlusal highspot[J]. JOURNAL OF ORAL REHABILITATION,2008,35(2):79-87.
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