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Updated: Aug 21, 2025

A Proinflammatory, Degenerative Organ Culture Model to Simulate Early-Stage Intervertebral Disc Disease.
Published on: February 14, 2021
Effect of intervertebral disc degeneration on the stomatognathic system function in adults
Flavia Argentato Cecilio1, Selma Siéssere1,2, Nicole Barbosa Bettiol1
1Department of Basic and Oral Biology, Ribeirão Preto School of Dentistry, University of São Paulo, Brazil.
Objective:
To analyze the electromyographic activity (EMG) and thermographic patterns of the masseter and temporalis muscles and pressure of the orofacial tissues in individuals with intervertebral disc degeneration (IDD).
Methods:
This study had two distinct groups: with IDD (n = 16) and controls (n = 16). EMG at rest, protrusion, right and left laterality, and maximum voluntary contraction were evaluated. Tongue, orbicularis oris, and buccinator muscles pressures were measured by Iowa Oral Performance Instrument. The thermographic patterns were analyzed using infrared thermography.
Results:
Comparisons between groups showed significant differences regarding at rest [right (p = 0.05) and left (p = 0.05) masseter and right temporal (p = 0.05)], orofacial tissue pressure [tongue (p = 0.001), orbicularis oris (p = 0.01), and buccinator (p = 0.0001)], but no significant differences for the thermographic patterns.
Conclusion:
IDD modifies the functionality of the craniomandibular complex, influencing the performance of the stomatognathic system.
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