Which resting tongue position does not represent a risk factor in triggering vertical inocclusion?

Which resting tongue position does not represent a risk factor in triggering vertical inocclusion?

• A. The retracted
• B. The protracted
• C. Between the arches
• D. Retroincisive

Answer: (D)

Resting tongue posture loads the teeth and jaw in the vertical plane, so positions that press on the front teeth or sit between the arches can push teeth apart or together and alter the vertical overlap. A tongue that rests behind the incisors, i.e., retroincisive, stays away from the incisal surfaces and the dental arches, exerting minimal direct pressure on the teeth. That lack of contact means it is unlikely to drive changes in vertical dimension of occlusion, making it not a risk factor. The other postures—tongue forward or between the arches—actively load the anterior teeth and can promote changes in vertical overlap, which is why they are considered risky with respect to vertical occlusion.

Resting tongue posture loads the teeth and jaw in the vertical plane, so positions that press on the front teeth or sit between the arches can push teeth apart or together and alter the vertical overlap. A tongue that rests behind the incisors, i.e., retroincisive, stays away from the incisal surfaces and the dental arches, exerting minimal direct pressure on the teeth. That lack of contact means it is unlikely to drive changes in vertical dimension of occlusion, making it not a risk factor. The other postures—tongue forward or between the arches—actively load the anterior teeth and can promote changes in vertical overlap, which is why they are considered risky with respect to vertical occlusion.