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Influence of mandibular tori on stomatognathic system function
José Mendes da Silva1,2, Cássia Pérola Dos Anjos Braga Pires1,2, Laíse Angélica Mendes Rodrigues1
1a Department of Restorative Dentistry, Ribeirão Preto Dental School , University of São Paulo , Ribeirão Preto , Brazil.
Cranio : the Journal of Craniomandibular Practice
|April 15, 2016
Summary
Prominent mandibular tori, bony growths in the jaw, significantly alter the stomatognathic system. These tori are associated with increased muscle activity and bite force, alongside reduced temporalis muscle thickness.
Area of Science:
- Oral and Maxillofacial Surgery
- Biomechanics
- Anatomy
Background:
- Mandibular tori are common bony exostoses on the lingual aspect of the mandible.
- Their impact on the functional dynamics of the stomatognathic system remains incompletely understood.
Purpose of the Study:
- To investigate the influence of mandibular tori on the electromyographic activity, muscle morphology, and bite force within the stomatognathic system.
Main Methods:
- Electromyography (EMG) analyzed muscle activity in 40 participants (20 with mandibular tori, 20 controls).
- Ultrasound imaging assessed masseter and temporalis muscle thickness.
- A digital dynamometer measured maximal molar bite force.
Main Results:
- Participants with mandibular tori exhibited higher masseter EMG activity (except at rest) and temporalis EMG activity during dynamic tasks.
- Reduced temporalis muscle thickness was observed in the mandibular tori group.
- Maximal molar bite force was significantly greater in individuals with mandibular tori.
Conclusions:
- Mandibular tori induce significant morphological and functional adaptations in the stomatognathic system.
- These findings highlight the biomechanical implications of mandibular tori on jaw function.
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