Sleep Bruxism in individuals with and without attrition-type tooth wear: An exploratory matched case-control electromyographic study
Abstract
Objectives
To
examine if there is a difference in possible sleep bruxism activity
(SB) in subjects with or without attrition-type tooth wear.
Methods
Sixteen
individuals with pronounced attritional-type tooth wear were compared
with sex and aged matched controls without tooth wear by means of
measurement of electromyographic (EMG) activity during a minimum of four
consecutive nights of sleep. Mean age and range for the study- and
control- group was 23.7 years (range 19.9–28.5) and 23.6 years (range
20.3–27.9), respectively. There were 11 females and five males in each
of the two groups. The attrition group presented incisal/occlusal
attrition wear into dentin and matching wear facets between opposing
anterior teeth. The controls had negligible signs of incisal/occlusal
wear and a minimal number of matching wear facets.
Results
The
prevalence of both self-reported and partner-reported SB was
significantly more common in the attrition group compared to the
controls (P = 0.04 and P = 0.007, respectively). Self-reported morning facial pain was similarly more common in the attrition group (P = 0.014).
Maximum opening capacity, number of muscles painful to palpation,
salivary flow rate and buffering capacity were not significantly
different between the groups. Interestingly, none of the measures of jaw
muscle EMG activity during sleep, as recorded by the portable EMG
equipment, differed significantly between the attrition group and the
matched controls (P > 0.05).
Conclusions
The
results from this exploratory study suggest that there is no difference
in EMG activity between subjects with and without attrition-type tooth
wear. Further research is needed in order to substantiate these
preliminary findings.
Comments