Abstract
Statement of problem
The relationship of awake bruxism with pain is still unclear.
Purpose
The purpose of this clinical study was to evaluate awake bruxism behavior for 1 week
in healthy young adults with ecological momentary assessment, assess its relationship
with masticatory muscle tenderness, and the participation of endogenous analgesia.
Material and methods
A total of 150 healthy participants were provided with a smartphone application that
sent 10 alerts at random intervals every day. The participants were instructed to
report in real time which of the following awake bruxism behaviors best represented
their current condition: relaxed jaw muscles, tooth contact, tooth clenching, tooth
grinding, or jaw bracing. At baseline, participants underwent recordings of the pressure
pain threshold and conditioned pain modulation of the masticatory muscles. Pressure
pain threshold recording was also repeated on the last day of the study. A t test was used to compare the first and the last pressure pain threshold recording
after 1 week with an ecological momentary assessment evaluation. The Pearson correlation
test was performed to evaluate the correlation between variables (α=.05).
Results
Overall compliance was 75.9%. The average frequency of relaxed jaw muscles was 54.5%,
tooth contact 29.4%, jaw bracing 5.8%, tooth clenching 9.7%, and tooth grinding 0.6%.
The average frequency of a distinct awake bruxism behavior was 45.5%. A statistically
significant increase in pressure pain threshold values was found (P=.001; P=.001; P=.045 for right and left anterior temporalis and left masseter, respectively). No
significant correlation was found between the frequency of awake bruxism behaviors,
the pressure pain threshold, and conditioned pain modulation (P>.05).
Conclusions
The most prevalent behavior was tooth contact (29.4%). No relationship was found between
awake bruxism behaviors and masticatory muscle tenderness or endogenous analgesia.
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Article info
Publication history
Published online: April 15, 2023
Publication stage
In Press Corrected ProofFootnotes
Funding: Supported by the National Council for Scientific and Technological Development (CNPq), Brazil [Finance Code 001; MSc Scholarship of Dyanne Medina Flores; Process 99729118.6.0000.5417].
Identification
Copyright
© 2023 by the Editorial Council for The Journal of Prosthetic Dentistry.
