The electromyographic activity of masseter and temporal muscles in the subjects with oral-facial pain caused by experimental occlusal interference
- VernacularTitle:实验性咬合高点诱发头面部疼痛时的肌电分析研究
- Author:
Jian LI
;
Ting JIANG
;
Zhenkang ZHANG
- Publication Type:Journal Article
- Keywords:
Electromyography;
Occlusal interference;
Oral-maxi llofacial pain;
Masticatory function
- From:
Journal of Practical Stomatology
2001;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the oral-maxillofacial pain and t he surface electromyographic (EMG) activity of masseter muscles and anterior and posterior portions of temporalis muscles after experimental interference. Methods:A cast onlay of 0.5 mm in height was placed on the right low er first molar and remained for three days in 10 adult volunteers with normal oc clusion and without any symptom of TMD. The oral-maxillofacial pain was continu ously scored on a visual analogue scale(VAS)by the subjects before and after t he placement of the onlay. At the same time, the integral data of surface EMG we re recorded, and then the asymmetry index of the activity of bilateral muscles w as calculated. Results:Three days after the placement of the occ lusal highspot, all the subjects complained oral-maxillofacial pain. 8 of them had headache in right temporal region with VAS value of 1~4; the activity of tem poralis anterior at rest position of mandible was increased significantly (P
