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[Sternocleidomastoid-mandibular interaction and the rest position]

S Chersoni1

  • 1Cattedra di Clinica Odontostomatologica, Università degli Studi, Bologna.

Minerva Stomatologica
|April 1, 1997
PubMed
Summary

The interaction between sternocleidomastoid muscles and mandibular corners may support the mandibular rest position. This finding is crucial for diagnosing and rehabilitating the stomatognathic apparatus and cervical spine.

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Area of Science:

  • Biomechanics of the stomatognathic system.
  • Craniofacial muscle interactions.
  • Neuromuscular control of jaw movements.

Context:

  • The stomatognathic apparatus, encompassing the mandible and associated muscles, plays a vital role in functions like mastication and speech.
  • Understanding the interplay between cervical muscles and jaw positioning is essential for a holistic view of head and neck function.
  • Existing research highlights connections between the stomatognathic system and the cervical spine, but the precise mechanisms remain incompletely understood.

Purpose:

  • To investigate the functional role of the interaction between the sternocleidomastoid muscles and mandibular corners (ISM) in regulating the mandibular rest position.
  • To elucidate the biomechanical contributions of ISM to the stability and positioning of the mandible.
  • To explore how head posture influences these interactions and their impact on the stomatognathic system.

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Summary:

  • Mandibular opening and closing movements were recorded in four healthy volunteers under two head postures.
  • Analysis revealed that the sternocleidomastoid muscles and mandibular corners may act as crucial support structures, distributing forces and preventing undue stress on masticatory muscles.
  • A novel theory regarding the establishment of the mandibular rest position was developed based on these interactions.

Impact:

  • Provides a new theoretical framework for understanding the biomechanics of the mandibular rest position.
  • Offers insights into the relationship between the stomatognathic apparatus and the cervical spine, potentially improving diagnostic and rehabilitation strategies.
  • Highlights the importance of considering head and neck posture in the assessment and treatment of temporomandibular disorders.