Which habit is most commonly associated with malocclusion?

Which habit is most commonly associated with malocclusion?

• A. Tongue thrusting
• B. Inferior lip biting
• C. Thumb/finger sucking
• D. Oral breathing

Answer: (C)

Habits during growth can shape how the teeth and jaws develop. Thumb or finger sucking is the habit most commonly linked to malocclusion because the constant suction and pressure on the palate and anterior teeth pushes the upper front teeth forward and can alter the arch form. This tends to produce proclined maxillary incisors, increased overjet, and, if the habit persists, an anterior open bite and/or a narrowed upper arch with potential posterior crossbite. Other habits like tongue thrusting, mouth breathing, or lip biting can contribute as well, but thumb sucking shows the strongest and most consistent association across patients. Encouraging early cessation often helps prevent or lessen these changes, with interceptive measures or targeted orthodontic treatment as needed.

Habits during growth can shape how the teeth and jaws develop. Thumb or finger sucking is the habit most commonly linked to malocclusion because the constant suction and pressure on the palate and anterior teeth pushes the upper front teeth forward and can alter the arch form. This tends to produce proclined maxillary incisors, increased overjet, and, if the habit persists, an anterior open bite and/or a narrowed upper arch with potential posterior crossbite. Other habits like tongue thrusting, mouth breathing, or lip biting can contribute as well, but thumb sucking shows the strongest and most consistent association across patients. Encouraging early cessation often helps prevent or lessen these changes, with interceptive measures or targeted orthodontic treatment as needed.