October 29, 2026 Author : Patrícia Andrade (Dentistry ) Functional jaw orthopedics is the field of dentistry that monitors the growth and development of the jaws and aims to correct or manage bite abnormalities, tooth positioning issues, and discrepancies in the relationship between the skeletal bases (maxilla and mandible). It often uses removable appliances designed to guide the development of skeletal, muscular, and dental structures during growth. It is based on Claude Bernard’s principle: “ Function creates the organ, and the organ provides the function ,” emphasizing the relationship between the form and function of the structures involved in the masticatory system. Why is it important to intervene during growth? Childhood and adolescence are periods of active growth and development of the craniofacial complex. When bite abnormalities, jaw-position discrepancies, or certain habits interfere with this development, early intervention can help promote balance between the jaws, teeth, and muscles involved in oral functions, while reducing the complexity of future treatments. In which situations can it be recommended? Functional jaw orthopedics may be indicated in several situations, including: Dental crowding , when there is insufficient space for the teeth; Crossbite , when, for example, some upper teeth are positioned inside the lower teeth; Open bite , when there is a gap between the upper and lower teeth when biting; Mandibular retrognathia , when the mandible is positioned further back in relation to the maxilla. In some children, for example, it may be possible to stimulate mandibular growth when the jaw is positioned too far back, or to promote maxillary expansion when there is insufficient space. How do functional orthopedic appliances work? Functional jaw orthopedic appliances are often removable and work through stimuli that help guide the functional relationship between the teeth, jaws, and muscles. They are generally well tolerated. The duration of use depends on the type of appliance and the diagnosis and should follow the recommendations of the clinical team. Because these appliances are removable, the cooperation of both the child and the family is essential for successful treatment, including proper use of the appliance, its maintenance, and attendance at follow-up appointments. Is functional orthopedics only indicated when there is an obvious anatomical problem in the teeth or jaws? Not necessarily. An early evaluation can also identify habits that may interfere with craniofacial development, such as certain sucking habits, including prolonged pacifier use and thumb sucking, as well as functional alterations such as mouth breathing. What is the most appropriate age to begin treatment? Functional jaw orthopedics is primarily intended for children and adolescents who are still growing . However, there is no single age at which treatment should begin. The ideal timing depends on the type of condition, the child’s stage of growth, and the individual characteristics of each case. For this reason, an early assessment makes it possible to determine whether any alteration is present and identify the most appropriate time for intervention. Who evaluates and follows up the treatment? The assessment, diagnosis, and treatment planning are carried out by a dentist with specific training in functional jaw orthopedics . Depending on each child needs, treatment may involve a multidisciplinary approach, with the collaboration of other healthcare professionals, such as ear, nose and throat specialists, speech and language therapists, and physiotherapists. Meet the dentistry clinical team from Hospital da Luz network. The content published in the Health Guide is intended for the general public and is provided for informational and educational purposes only. It does not replace individual medical assessment, diagnosis, or personalized clinical advice from a qualified healthcare professional. The content is produced or reviewed by physicians and other healthcare professionals at Hospital da Luz and is based on the knowledge available at the time of publication or the most recent update, as indicated at the beginning of each item. English translation generated with AI and reviewed by the editorial team.
