Functional Appliances

During Phase One of Orthodontics, Our Practice
Uses a Variety of Devices.  Read More Below.

Appliance Therapy

Functional Appliances are used mainly in growing children to help solve the problem of narrow upper and lower jaws, which could cause crowding of the permanent teeth. When the narrow upper and lower jaws are developed to normal shape and size with functional appliances, in the majority of cases it is not necessary to extract permanent teeth.

Most children with crowded teeth and bad bites have narrow jaws and underdeveloped lower jaws, which could be corrected with functional appliances. Functional appliances help correct the bone problems, while the tooth problems are corrected with the orthodontic braces.

Narrow Arch
Posterior Crossbite Right

Broad Arch
4 Years Later

The ideal age for the use of functional appliances is between ages seven and eleven, when the cooperation level is the highest. However, functional appliances can be utilized as early as age 4, if the upper jaw is too narrow and is having a negative effect on the child’s breathing and speech. Arch Development (functional appliances) can also be used in adults to develop the arch to a more normal shape and size before applying the braces.

The use of functional appliances can reduce the time the child must wear fixed braces and also can reduce the need for the extraction of permanent teeth. Functional appliances develop the dental arches so that all the permanent teeth can erupt, which ensures an outstanding profile, broad smile and healthy jaw joints.

Below is a list of some functional devices.  Please click through to read more about each functional device and contact Rondeau & Associates for any questions and to schedule a consultation.

  • Twin Blocks™ are designed so the mandible is held in a protrusive postion.  This appliance is ideal in cases with large overjets when the mandible is recessive.

  • MARA™ (Mandibular Anterior Repositioning Appliance) is ideal for non-compliant patients with Class II skeletal malocclusions and deficient mandibles.

  • The Anterior Sagittal is an upper removable orthodontic appliance that is used in the mixed or permanent dentition to correct anterior crossbites.

  • The Posterior Sagittal is a removable orthodontic appliance that can be used on the upper or lower arches primarily to distalize the molars.

  • The new Tandem™ appliance is ideal for Class III skeletal patients in mixed dentition who have retrognathic maxillas and normal mandibles.

  • The Rick-A-Nator is a fixed functional appliance consisting of an incisal ramp located lingual to the maxillary anteriors, connected to the maxillary first molar bands via two connector wires.

  • The Schwarz Appliance is a transverse maxillary or mandibular expansion appliance, which is used mainly in deciduous dentition or mixed dentition to widen the maxillary or mandibular arches.

  • The Hyrax is one of the most popular fixed arch expansion appliances for mixed and permanent dentition.

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