Which sleeping posture is most likely to produce mesial occlusion?

Which sleeping posture is most likely to produce mesial occlusion?

• A. Head Flexion
• B. Head Extension
• C. Neutral Head Position
• D. Lateral Head Tilt

Answer: (A)

Jaw position during sleep can influence how the upper and lower arches meet. When the head is flexed (chin toward the chest), the airway can be partially compromised, and the jaw may position itself more forward to keep the tongue and soft tissues in place. This forward or protrusive posture of the mandible shifts the lower teeth ahead of the upper teeth, promoting mesial occlusion (a Class III tendency). In contrast, head extension, neutral head position, or lateral head tilt don’t drive the mandible forward in the same way, so they’re less likely to produce a mesial (anterior) bite pattern.

Jaw position during sleep can influence how the upper and lower arches meet. When the head is flexed (chin toward the chest), the airway can be partially compromised, and the jaw may position itself more forward to keep the tongue and soft tissues in place. This forward or protrusive posture of the mandible shifts the lower teeth ahead of the upper teeth, promoting mesial occlusion (a Class III tendency).

In contrast, head extension, neutral head position, or lateral head tilt don’t drive the mandible forward in the same way, so they’re less likely to produce a mesial (anterior) bite pattern.