Understanding the role of osteoarthrosis on electromyographic activity of masticatory muscles and quality of life.

M Righetti,F Rufato,L Gonçalves,S Siessere,S Regalo,V Arnoni,M Palinkas,O Taube,N Da Silva

doi:10.4317/jced.56582

Abstract

BackgroundOsteoarthrosis is a severe, evolutionary, chronic, and limiting disease that influences on quality of life, as it affects synovial joints and promoted degradation of hyaline articular cartilage. We sought to determine if electromyographic activity of the masticatory muscles and quality of life are negatively impacted by osteoarthrosis. Material and MethodsA sample of 72 participants between 40 and 70 years old diagnosed with osteoarthrosis were selected. Forty-eight participants met the inclusion criteria of this study and were divided into two distinct groups: with osteoarthrosis (n=24) and without osteoarthrosis (n=24). Electromyographic activity of the masseter and temporalis muscles (mandibular rest, right laterality, left laterality, protrusion, and dental clenching in maximal voluntary contraction) and quality of life measurements were used. Electromyographic activity was used to analyze muscle activation patterns. OHIP-14Br and SF-36 questionnaires determined the quality of life. ResultsThe participants with osteoarthrosis presented significant greater electromyographic activity (p≤0.05) at rest for the right temporal muscle (p=0.04), maximum voluntary contraction for the left masseter muscle (P=0.04), repercussions of oral conditions on quality of life by the sum of OHIP-14 (p=0.002), and a statistically significant difference was found in all subgroups of the SF-36 scale between the subjects with and without osteoarthrosis (p≤0.001). ConclusionsPeople with osteoarthrosis have changes in electromyographic activity of the masticatory muscles and quality of life compared to healthy participants. Key words:Electromyography, quality of life, bone diseases.

Highlights

In the group of musculoskeletal diseases, osteoarthrosis is a chronic, evolutionary, painful, and limiting degenerative disease involving the articular cartilage, surrounding tissues, and subchondral bone, and is one of the main osteoarticular diseases due to senescence and senility [1,2]
The relationship between rheumatic diseases and the stomatognathic system still remains uncertain because there are no studies in the international literature demonstrating the effects of osteoarthrosis on the action potentials of masticatory muscle fibers
We sought to determine if electromyographic activity of the masticatory muscles and quality of life are negatively impacted by osteoarthrosis

Summary

Introduction

In the group of musculoskeletal diseases, osteoarthrosis is a chronic, evolutionary, painful, and limiting degenerative disease involving the articular cartilage, surrounding tissues, and subchondral bone, and is one of the main osteoarticular diseases due to senescence and senility [1,2]. This disease weakens millions of people worldwide, affecting the population over 60 years [3], and the number of cases of this disease is estimated to double by 2020 [4]. We sought to determine if electromyographic activity of the masticatory muscles and quality of life are negatively impacted by osteoarthrosis

Material and Methods

Results

Discussion