Influence of clear thermoplastic retainer on the electromyography of temporalis muscle and masseter muscle
- VernacularTitle:透明保持器对颞肌、咬肌肌电影响的分析研究
- Author:
Huixia CHEN
;
Chengjie ZHANG
;
Yuan LI
;
Wenjing CHEN
- Publication Type:Journal Article
- Keywords:
Clear thermoplastics retainer;
Electromyography
- From:
Journal of Practical Stomatology
2009;25(6):900-901
- CountryChina
- Language:Chinese
-
Abstract:
Clear thermoplastic retainer is one of the most commonly used retention devices in orthodontics.However, studies about the electromyography (EMG) of temporalis muscle (TM) and masseter muscle (MM) in people with clear thermoplastic retainer are few. The purpose of this study was to observe the influence of clear thermoplastic retainer on the EMG of TM and MM in mandible posture position (MPP) , speaking [s] ,[z] and [a]. Choose people according to the standards, decide the situation by preliminary experiment. The EMG of TM, MM was studied before and after clear thermoplastic retainer was worn. Variance analysis was used to evaluate the differences. The results revealed that the EMG activity of TM?MM, viewed in MPP and when people said [s] ,[z] , was higher after clear thermoplastic retainer was worn. When people said [a], there was no significant difference.
