Abstract:
Introduction. Electromyography is often used to assess the changes in the masticatory system due to
different restorations including implants. Changes can be noticed both in the muscular activity and
interactions between muscles in the same patients. However, many indicators are individual and cannot be
compared, which in the end lead to the loss of useful data for the clinician.
Aim of study. Comparative evaluation of deviation coefficient in implant-supported restoration and dentate
patients.
Methods and materials. The study was based on 63 patients (33 women and 20 men) that were divided in
two groups. Dentate patients were the control group (33 subjects) and the edentulous ones with full-arch
implant restorations (30 subjects) were the study group. A total of 204 two-piece dental implants have been
placed and loaded with immediate provisional prostheses. The surface electromyography was performed
with evaluation of muscle electrical activity as well as mean deviation coefficient out of the 6 parameters
(PocTa, PocMM, Bar, Impact, Tors and Asym). Statistical analysis was done in R-Studio using variations
of the Wilcoxon test.
Results. Statistical analysis has shown that both groups had a deviation from the normal range provided by
the device. The study group had a mean deviation of 21,4 % and control one of 20.5%. Per to per comparison
didn’t reveal any statistical differences between groups in all six deviation coefficients as well as in mean
one (p>0.05).
Conclusion. Fixed implant supported restoration provided an immediate equilibration of muscle activity
similar to the dentate subjects. Despite the fact that implant-retained prostheses were new to the patients
and there were no adaptational periods, that did not create any interferences in muscle function.
