LOGIN
 
Share Page:
Back

Volume 19 , Issue 2
Spring 2005

Pages 119126


Pain Patterns and Mandibular Dysfunction Following Experimental Trapezius Muscle Pain

Osamu Komiyama, DDS, PhD /Maki Arai, DDS, PhD/Misao Kawara, DDS, PhD/Kihei Kobayashi, DDS, PhD/Antoon De Laat, LDS, GHO


PMID: 15895834

Aims: To clarify the effects of experimental trapezius muscle pain on the spread of pain and on jaw motor function. Methods: In 12 male subjects aged 25 to 35 years, experimental pain was induced in the superior border of the trapezius muscle by injecting 0.5 mL of hypertonic (6%) saline. The control infusion consisted of a 0.5-mL isotonic (0.9%) saline solution. Pain intensity was evaluated on a visual analog scale (VAS). An experimental (EX) and a control (CT) injection were administered to the subjects in a randomized sequence. Results: Pain intensity as scored on the VAS increased immediately after the EX injection and decreased gradually after reaching a peak of 68.0 16.1 mm at 60 seconds after injection. The VAS scores in the EX condition were significantly higher than after the CT condition from 30 to 330 seconds after injection (P , .05, analysis of variance [ANOVA]). Mean ( SD) maximal unassisted mouth opening before injection in the EX condition was 54 5.7 mm and decreased immediately after the injection, reaching a low of 47.8 5.1 mm. A gradual recovery to normal was then observed. This reduction of mouth opening in the EX condition was significant compared with the CT condition from immediately after the injection to 60 seconds after the injection (P , .05, ANOVA). According to the subjects, pain spread most often to the infra-auricular zone (n = 6), and the posterolateral part of the neck (n = 10). Conclusion: The present results suggest that experimental trapezius muscle pain can spread over a wide area and is also accompanied by a temporary reduction of mouth opening. J Orofac Pain 2005;19:119126


Full Text PDF File | Order Article

 

 
Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.

 

© 2017 Quintessence Publishing Co, Inc

JOFPH Home
Current Issue
Ahead of Print
Archive
Author Guidelines
About
Accepted Manuscripts
Submission Form
Submit
Reprints
Permission
Advertising
Quintessence Home
Terms of Use
Privacy Policy
About Us
Contact Us
Help