PMID- 22292139
OWN - NLM
STAT- MEDLINE
DCOM- 20120510
LR  - 20140730
IS  - 1064-6655 (Print)
IS  - 1064-6655 (Linking)
VI  - 26
IP  - 1
DP  - 2012 Winter
TI  - Assessment of proprioceptive allodynia after tooth-clenching exercises.
PG  - 39-48
AB  - AIMS: To (A) evaluate test-retest reliability of vibrotactile sensitivity in the 
      masseter muscle and (B) test if (1) the vibration threshold is decreased after 
      experimental tooth clenching, (2) intense vibrations exacerbate pain after tooth 
      clenching, (3) pain and fatigue are increased after tooth clenching, and (4) 
      pressure pain thresholds are decreased after tooth clenching. METHODS: In part A, 
      25 healthy female volunteers (mean age: 42 +/- 12 years) participated, and 16 
      healthy females (mean age 32 +/- 10 years) participated in three 60-minute 
      sessions, each with 24- and 48-hour follow-ups in part B. Participants were 
      randomly assigned tooth-clenching exercises with clenching levels of 10%, 20%, or 
      40% of maximal voluntary clenching. A Vibrameter applied to the right masseter 
      muscle measured perceived intensity of vibration and perceived discomfort, which 
      were assessed on 0-50-100 numeric rating scales. An electronic algometer measured 
      pressure pain threshold (PPT). Two 0- to 100-mm visual analog scales measured 
      pain intensity (VASpain) and fatigue (VASfatigue). Measurements were made on the 
      right masseter muscle. Interclass correlation coefficient (ICC) was used to 
      calculate test-retest reliability of VT measurements. Outcome variables were 
      tested with two-way ANOVAs for repeated measures and Dunnett's post-hoc test. 
      RESULTS: Moderate long-term (ICC 0.59) and good short-term (ICC 0.92) reliability 
      was found for VT on the masseter muscle. Clenching level had no main effect on 
      perceived intensity of vibration; time effects (P < .05) were only observed at 40 
      minutes (Dunnett's test: P < .01). Clenching level and time had no effect on 
      perceived discomfort. Only time effects were significant for PPT (P < .01), with 
      reductions at 50 and 60 minutes compared to baseline (Dunnett's test: P < .05). 
      Clenching level and time had main effects for VASpain and VASfatigue (P < .001). 
      CONCLUSION: Experimental tooth clenching appears to evoke moderate levels of pain 
      and fatigue and short-lasting hyperalgesia to mechanical stimulation, but not 
      proprioceptive allodynia. The absence of proprioceptive allodynia does not 
      necessarily exclude delayed onset muscle soreness (DOMS) but warrants further 
      studies on the clinical manifestations of DOMS in jaw muscles.
FAU - Dawson, Andreas
AU  - Dawson A
AD  - Department of Stomatognathic Physiology, Malmo University, Malmo, Sweden. 
      andreas.dawson@mah.se
FAU - List, Thomas
AU  - List T
FAU - Ernberg, Malin
AU  - Ernberg M
FAU - Svensson, Peter
AU  - Svensson P
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Randomized Controlled Trial
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - J Orofac Pain
JT  - Journal of orofacial pain
JID - 9418507
MH  - Adult
MH  - Bite Force
MH  - Cross-Over Studies
MH  - Facial Pain/diagnosis/physiopathology
MH  - Female
MH  - Follow-Up Studies
MH  - Humans
MH  - Hyperalgesia/*diagnosis/physiopathology
MH  - Masseter Muscle/*physiopathology
MH  - Muscle Contraction/*physiology
MH  - Muscle Fatigue/physiology
MH  - Pain Measurement
MH  - Pain Threshold/physiology
MH  - Pressure
MH  - Proprioception/*physiology
MH  - Reproducibility of Results
MH  - Sensory Thresholds/physiology
MH  - Touch/physiology
MH  - Vibration
EDAT- 2012/02/01 06:00
MHDA- 2012/05/11 06:00
CRDT- 2012/02/01 06:00
PHST- 2012/02/01 06:00 [entrez]
PHST- 2012/02/01 06:00 [pubmed]
PHST- 2012/05/11 06:00 [medline]
PST - ppublish
SO  - J Orofac Pain. 2012 Winter;26(1):39-48.