Your teeth and jaws are positioned where they are due to an overall balance of forces. It only takes approximately 2 grams of force to move a tooth, assuming the force is there for a long time. Lips can exert around 200g and the tongue can exert around 500g. If these muscles, amongst other muscles, are not functioning correctly, they prevent the jaws from developing correctly, and the teeth end up in an incorrect position. Myobrace along with myofunctional activities are exercises for your facial muscles to strengthen them and also retrain them to function correctly. For example, if we see a tongue sitting in the roof of the mouth at all times (except while speaking and eating), that constant pressure on the palate will stimulate growth. If the tongue therefore sits low, the palate has no stimulation so growth will be less than ideal. Another example can be seen with swallowing. During a normal swallow, none of your facial muscles should move. If we need the lower lip or cheek to create a seal during a swallow, this continual activation of these muscles throughout the day will restrict the outward growth of the jaws, preventing ideal development.
Watch the video from Dr Barry Raphael from the USA talking about Myobrace and the importance of addressing function.