In a perfect world anyone having orthodontic treatment, or substantial dental treatment should have a Myofunctional Evaluation. This will alert both the patient and the dentist to any potential difficulty that may impact the outcome of treatment. The assumption is often made that if form is changed, then function will follow. Form in this case is the relationship of the teeth to one another, or changes in positioning of the jaw, or major changes in a cosmetic way. The function is the relationship of the oral muscles, primarily the tongue, lips and cheeks and how they impact the dentition.