Stomatognathic System: Anatomy, Functions and Bioethics

The Stomatognathic System: An Integrated Unit

The Stomatognathic System is an integrated and coordinated morphofunctional unit consisting of skeletal structures, muscles, nerves, glands, and dental components. It is structurally and functionally linked to the digestive, respiratory, and phonological systems, as well as facial aesthetics and the senses of taste, touch, and balance. It performs vital functions including suction, oral digestion, swallowing, and verbal communication.

This system is intrinsically linked to speech, as the necessary structures are part of the stomatognathic apparatus and maintain complex relationships with the phonatory and respiratory systems.

Core Topics

• Definition and scope
• Functional anatomy
• Systemic relationships

Ethics and Humanistic Practice

In clinical practice, health professionals must maintain moral awareness and responsibility. We must inform patients about their conditions and prioritize their welfare. This humanistic approach treats the patient as a person rather than a pathology, fostering empathy and meaningful learning through cognitive reasoning.

Anatomical Structures and Growth

Key muscles and structures include:

• Orbicularis oris
• Zygomaticus major
• Risorius
• Buccinator
• Lateral pterygoid: Inserted in the temporal condyle and the articular disc.

The Functional Matrix theory allows for proper postnatal craniofacial growth by balancing forces and tensions within the area.

Centric Occlusion

Centric occlusion is the position where the upper first molar meets the mandibular first molar, with the lower molar positioned slightly ahead of the upper molar.

Bioethics and Professional Conduct

Bioethics involves the creative use of dialogue to solve dilemmas regarding research, life, health, and the environment.

Key Bioethical Frameworks

• Moral: Customs, rules, and values of a community.
• Ethics: The application of reason to beliefs and habits.
• Regulatory Bioethics: Supervision of conduct for peaceful coexistence.
• Bioethics Politics: Clinical and legal standards for practice.
• Cultural Bioethics: Bioethics within historical and social contexts.
• Clinical Bioethics: Focuses on day-to-day decision-making.

Core Bioethical Concepts

• Beneficence and non-maleficence
• Respect for information control
• Duty to tell the truth
• Right to self-determination
• Duty to do justice
• Informed consent