What are the functions of the TMJ?

The TMJ No More™(The TMJ Solution) By Christian Goodman In this eBook the author has shared he has shared his experiences while treating his 12 years old chronic problems of severe tinnitus and TMJ disorders. He has enabled thousands of people all over the world, regardless of their gender, by teaching them how to get rid of their disorders related to TMJ faster than your expectations without using any drugs, mouth guards to splints or facing the risk of any surgery.

The temporomandibular joint (TMJ) is one of the most complex and important joints in the human body. It connects the lower jaw (mandible) to the temporal bone of the skull, located in front of each ear. The TMJ allows for a wide range of movements essential for various functions. Here are the primary functions of the TMJ:

1. Chewing (Mastication)

Opening and Closing the Mouth

The TMJ enables the mandible to move up and down, which is essential for biting and closing the mouth on food.

Side-to-Side Movement

This movement allows the grinding and tearing of food between the molars, aiding in effective mastication.

Forward and Backward Movement

The TMJ allows the jaw to move slightly forward and backward, which helps in the process of grinding food thoroughly.

2. Speaking

Articulation of Speech

The TMJ’s ability to move the jaw in various directions is crucial for speech. Movements of the jaw contribute to the articulation of words and sounds, enabling clear and effective communication.

3. Swallowing

Coordination with Tongue and Mouth Muscles

The TMJ works in coordination with the muscles of the tongue and mouth to facilitate the swallowing process. Proper movement of the jaw helps in positioning food for swallowing.

4. Breathing

Airway Maintenance

During certain actions like deep breathing or mouth breathing, the TMJ helps in maintaining an open airway by allowing the jaw to adjust its position.

5. Yawning and Singing

Wide Mouth Opening

The TMJ allows the mouth to open widely, which is necessary for yawning and activities that require a large range of motion, such as singing.

6. Facial Expressions

Emotional Expression

Movements of the jaw facilitated by the TMJ contribute to various facial expressions, playing a role in non-verbal communication and emotional expression.

Anatomy of the TMJ That Facilitates Its Functions

Articular Disc
- A fibrocartilaginous disc that acts as a cushion between the mandible and the temporal bone, allowing smooth and coordinated movements of the jaw.
Muscles of Mastication
- Masseter: Elevates the jaw to close the mouth.
- Temporalis: Elevates and retracts the jaw.
- Medial and Lateral Pterygoids: Aid in grinding movements and lateral movements of the jaw.
Ligaments
- Temporomandibular Ligament: Provides support to the joint.
- Sphenomandibular Ligament: Supports the mandible.
- Stylomandibular Ligament: Limits excessive movements of the mandible.
Synovial Fluid
- Lubricates the joint, reducing friction and wear during jaw movements.

References

American Association of Oral and Maxillofacial Surgeons. “TMJ Disorders.” AAOMS TMJ Disorders
National Institute of Dental and Craniofacial Research (NIDCR). “TMJ Disorders.” NIDCR TMJ Disorders
Mayo Clinic. “TMJ Disorders.” Mayo Clinic TMJ Disorders

Understanding the functions of the TMJ and its role in everyday activities highlights its importance and the impact TMJ disorders can have on quality of life. Proper diagnosis and treatment are crucial for managing TMJ-related issues effectively.