Preventive and interceptive orthodontics refers to treatments undertaken at an early age, during the most active stages of dental and craniofacial growth, aimed at removing the factors thought to be responsible for dental malocclusions, restoring normal growth, and enabling proper and functional dental alignment. When the patient is young, it is possible to remove the factors that cause malocclusions, harness the natural forces of growth, and achieve a balanced profile before the eruption of permanent teeth. The orthodontic correction methods used to date for this purpose have consisted of functional removable appliances and/or fixed appliances. A technique using a highly effective orthodontic appliance is available, which both reduces treatment time (from 6 to 12 months) and eliminates the need for other removable or fixed appliances in approximately 70% of children's malocclusions. This device exists in a version for ages 5 to 7 (Nite-Guide) and one for ages 9 to 12 (Occlus-o-Guide).

The guiding principle of orthodontic techniques using these devices is "guided occlusion," which promotes proper tooth eruption and the development of the dental arches toward an ideal shape with correct occlusal, transverse, and sagittal relationships. Both are preformed devices (measuring the diameter of certain teeth corresponds to different appliance sizes), constructed strictly according to the fundamental principles of functional occlusion, made of soft plastic material and suitable for both orthopedic and dental purposes. They act simultaneously on both dental arches (upper and lower), and this simultaneity shortens treatment duration and makes the correction more stable. The dental malocclusions most susceptible to correction are: • protrusions of the upper jaw, often associated with a retruded position of the mandible;