The “palatal crib” appliance usually stops thumb sucking immediately. The crib will then be in place for an additional six months to confirm discontinuation of the habit. The crib is crafted and cemented behind the teeth, making it less visible. Preventing the thumb from reaching the roof of the mouth reduces gratification, and breaks the habit very quickly.
Pacifiers are not a better alternative to thumb-sucking. They can affect the teeth essentially the same way as sucking fingers and thumbs, and sometimes have worse oral complications. However, pacifier use can be more easily broken than the thumb or finger habit. If you have concerns about thumb sucking or use of a pacifier, consult Dr. Richards.