Introduction: This article proposes a standardized method for myofunctional evaluation and treatment for patients undergoing orthognathic surgery. Patients selected for surgery typically exhibit a malocclusion or facial disharmony due to abnormal bone development. [excerpt]
Conclusion: Orthognathic surgery, together with orthodontic treatment to align the teeth, provide a harmonious maxillomandibular relationship. Surgery and orthodontics also improve the relationship between the bones and soft tissues. There is an anatomical and aesthetic improvement. However, function in itself is not modified. If the individual has hypotonic lips and tongue thrust, these conditions will persist after surgery. The anatomic harmony of the face will improve function, but it will not solve the problem completely. Myofunctional therapy adds a new dimension to orthognathic surgery. The functional aspects have begun to receive their due value. Some surgical techniques have also become revised in view of a new understanding of physiology, and the once common relapses due to muscle imbalances can now be avoided. The main goal of myofunctional therapy for patients undergoing orthognathic surgery is to restore normal function and to obtain muscular static and dynamic equilibrium. A successful stable outcome from the surgical, orthodontic, and myofunctional treatments has a great impact on the patient's psychological well-being. Myofunctional therapy's relationship to orthognathic surgery is a field ripe for future research.