Muscular pattern in patients with temporomandibular joint disc displacement with reduction: an electromyographical  assessment: doi: 10.7417/CT.2020.2251

P.  Di Giacomo; G. Ferrato; E. Serritella; A. Polimeni; C.  Di Paolo

V. 171 N. 5 (2020), Research article

V. 171 N. 5 (2020)

Muscular pattern in patients with temporomandibular joint disc displacement with reduction: an electromyographical assessment: doi: 10.7417/CT.2020.2251

Research article

Pubblicato 2020-09-09

P. Di Giacomo⁺⁻
G. Ferrato⁺⁻
E. Serritella⁺⁻
A. Polimeni⁺⁻
C. Di Paolo⁺⁻

P. Di Giacomo

DDS, Ph.D Department of Oral and Maxillo-facial Sciences, Sapienza, University of Rome

G. Ferrato

DDS, Ph.D Department of Oral and Maxillo-facial Sciences, Sapienza, University of Rome

E. Serritella

DDS, Department of Oral and Maxillo-facial Sciences, Sapienza, University of Rome

A. Polimeni

MD, DDS, Full Professor Department of Oral and Maxillo-facial Sciences, Sapienza, University of Rome, Rome, Italy

C. Di Paolo

MD, DDS, Full Professor Department of Oral and Maxillo-facial Sciences, Sapienza, University of Rome, Italy

PDF

Parole chiave

Surface Electromyography
Temporomandibular disorders
Disc displacement
Masticatory muscles
Temporomandibular joint
Muscle impairment

Abstract

Objective
Surface Electromyography of masticatory muscles (sEMG) is used as a tool to support diagnosis and treatment of Temporomandibular disorders (TMDs). The study aimed at examining jaw muscles pattern in individuals with temporomandibular joint disc displacement with reduction (TMJ/DDR). This sort of subjects was supposed to have a different muscular pattern compared to the control group.

Materials and methods
Sixty-four women with unilateral TMJ/DDR and forty TMD-free women underwent a sEMG assessment of masticatory muscles. Descriptive statistics were performed. Student T-Test assessed differences between the two groups. Statistical significance was set at ρ < 0.05.

Results
The t-test showed statistically significant results only in BAR and SMI scores (ρ value < 0,0001). The other measurements did not differ between the two groups. BAR index values of all healthy subjects were within the reference range. Almost the entire TMJ/DDR group had BAR index out of reference range and anteriorly placed.

Conclusions
Women with TMJ/DDR showed an altered recruitment of the jaw muscles, with significant difference between the activity of the couple of temporalis and the one of masseters, compared to the control group. A lower chewing efficiency was found in the DDR group compared to the control one

PDF