What posture increases TMJ load?

What posture increases TMJ load?

• A. Upright posture
• B. Lying supine
• C. Standing on tiptoes
• D. Forward head posture

Answer: (D)

Forward head posture increases TMJ load because tipping the head forward shifts the head’s weight anteriorly and forces the neck to work harder to keep the head balanced. That extra muscle effort often leads to co-contraction of the jaw muscles and can bias the mandible into a more forward or strained position, increasing compressive and shear stresses on the TMJ and its supporting structures. Neutral upright posture keeps the jaw and head better aligned, reducing these undue forces, whereas simply lying supine or standing on tiptoes doesn’t produce the same sustained forward jaw positioning and muscle activation that heightens TMJ loading.

Forward head posture increases TMJ load because tipping the head forward shifts the head’s weight anteriorly and forces the neck to work harder to keep the head balanced. That extra muscle effort often leads to co-contraction of the jaw muscles and can bias the mandible into a more forward or strained position, increasing compressive and shear stresses on the TMJ and its supporting structures. Neutral upright posture keeps the jaw and head better aligned, reducing these undue forces, whereas simply lying supine or standing on tiptoes doesn’t produce the same sustained forward jaw positioning and muscle activation that heightens TMJ loading.