Abstract:
Abstract
Introduction. Surface electromyography has proven to
be a useful instrument for the assessment of success rate
for different dental treatments. However, due to numerous
variables that may influence the data like age, gender, fat
tissue thickness etc. it is necessary to adjust the obtained
values to a reference group with the same parameters.
Material and methods. A number of 33 patients were
included in the study (21 women and 12 men) aged between
43-67 years old (mean 54± SD1.26). Surface electromyography of masticatory muscles was used in these patients to
assess the average value in a time span and overlapping
coefficients. Totally 10 parameters from each patient were
recorded: TAL, TAR, MML, MMR, PocTA, PocMM, BAR, Asym,
TORS, Impact. Data were stored in an Excel spreadsheet and
then analyzed statistically using RStudio software.
Results. Based on the results of our study, the main EMG
activity indices in middle-aged Moldavian individuals had
the following values: for the left temporalis (TAL) was 42
µV, median 18.8 with a minimum of 3.8 and a maximum of
190 µV. For the right temporalis (TAR) the mean was 51.4
µV, median – 32.9, a minimal value of 7.9 and a maximum
of 248 µV. The left masseter had a mean of 48.7 µV, median
12.3, a minimal value of 1.5 and a maximum value of 439
µV. The right masseter had a mean of 42.1 µV, a median
of 16.3, minimum value 11.4 and maximum 243 µV. The
overlapping coefficients deviated with 20.5% from the normal range provided by the manufacturer.
Conclusions. Electromyographic activity of masticatory muscles in healthy patients can be used for comparison
with patients that had various dental treatment but have
the same age, gender, ethnicity, etc. The overlapping coefficients did not perfectly match in the normal range provided
by manufacturer even if these subjects had previously minimum dental procedures.
