We are using cookies to implement functions like login, shopping cart or language selection for this website. Furthermore we use Google Analytics to create anonymized statistical reports of the usage which creates Cookies too. You will find more information in our privacy policy.
OK, I agree I do not want Google Analytics-Cookies
Journal of Oral & Facial Pain and Headache
Login:
username:

password:

Plattform:

Forgotten password?

Registration

J Orofac Pain 32 (2018), No. 3     9. Aug. 2018
J Orofac Pain 32 (2018), No. 3  (09.08.2018)

Page 304-308


Immediate Effect of Continuous Ultrasound vs Sham Ultrasound for Bilateral Masseter Myalgia: A Double-Blinded Trial
Hussain, Haseeb / Crow, Heidi / Gonzalez, Yoly / McCall, W. D. Jr.
Aims: To investigate the local and segmental effects of therapeutic ultrasound at a dose of 0.4 w/cm2 with 100% duty cycle for 5 minutes compared to the effect of sham ultrasound on painful masticatory muscles.
Methods: A total of 20 adult female subjects with bilateral masseter myalgia diagnosed according to the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) were included. Each subject was randomized to either an active ultrasound group or a sham ultrasound group. The intervention was applied to each masseter muscle for 5 minutes. Measures included pre- and post-self-reported pain intensity recorded on a verbal rating scale (VRS), pressure pain thresholds for the masseter (PPT-M) and temporalis (PPT-T) muscles, and intraoral temperature for the masseter muscle. Preintervention score was subtracted from the postintervention score for all measures to calculate mean change in pain, and nonparametric Mann-Whitney test was used to compare the groups. Statistical significance was set at P < .05.
Results: Changes in VRS did not show a significant difference between groups (P > .05). There were significant increases in PPT-M and intraoral temperature in the ultrasound group compared to the sham group (P < .05). There was no significant difference in PPT-T (P > .05), suggesting no segmental effect.
Conclusion: Therapeutic ultrasound produced an immediate increase in PPT-M and intraoral temperature compared to sham ultrasound in female subjects with bilateral masseter myalgia.

Keywords: myalgia, TMD, ultrasound