What is the resting position of the temporomandibular joint (TMJ)?

• A. Teeth slightly apart, lips together, tongue touching the hard palate
• B. Teeth tightly clenched, lips apart
• C. Teeth completely apart with a protruded tongue
• D. Teeth aligned, mouth closed with tension

Answer: (A)

The correct option describes the ideal resting position of the temporomandibular joint (TMJ), which is characterized by a position where the teeth are slightly apart, the lips are together, and the tongue is resting gently against the hard palate. This position is also referred to as the "mandibular rest position" and is essential for proper TMJ function.

In this resting state, the mandible is aligned such that there is minimal muscular activity, reducing the strain on the temporomandibular joint and surrounding structures. It is a position of muscle relaxation, which helps maintain joint health and allows for an optimal opening and closing of the jaw when chewing or speaking, as well as reducing the risk of TMJ disorders.

Maintaining this resting position is crucial in physical therapy for patients with TMJ disorders, as it provides a baseline from which to assess any dysfunction or pain in the area. Understanding this position can aid practitioners in developing strategies for therapeutic interventions to alleviate discomfort and improve joint function.