Prosthetic treatment optimization with the use of all-ceramic constructions under synchroelectromyography method supervision

Abstract

Objective of present study was dedicated to the evaluation of effectiveness regarding prosthetic treatment optimization with the use of all-ceramic restorations based on synchroelectromyography method supervision. Due to the used inclusion and exclusion criteria study cohort was formed with 61 patients. Rehabilitation of study and control groups was held with the use of all-ceramic restorations by analogical protocols, except control group didn’t receive any EMG-control at the stages of primary diagnostics, composite mock-up correction and final crown/FPD fixation. Mean clinical success levels of all-ceramic crowns/FPD after 1 year of service in both study and control group outreached 90%. Mock-up correction of 3 teeth dentition defects based on registered EMG-values was associated with statistically significant differences of all EMG-indexes while comparing such at the moment of mock-up fixation and at the moment of reaching relative masticatory muscles balance (p < 0.05). No statistically approved linear correlation was noted regarding fact of ceramic chipping or fracture occurrence and fact of using EMG-controlling approach, while correlation was noted regarding length of dentition defect and fact of ceramic chipping (considering 3 teeth dentition defect – r=0.46, p < 0.05). Patients who received appropriate EMG-diagnostics were characterized with less frequent ceramic chipping and fractures compare to patients who were rehabilitated without the use of EMG-control (even though registered difference was not statistically significant), and with higher satisfaction of received crown/FPD service regarding duration of subjective adaptation to the crown (p < 0.05) and fact of reaching full adaptation demands (p < 0.05). Use of EMG-control approach could be recommended as preventive regarding biomechanical prognosis of all-ceramic restorations placed on posterior teeth, and as optimal for faster subjective adaptation of the patients to the received prosthetic constructions.