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These appliances can be used to achieve expansion in the maxillary arch; there are devices for mandibular expansion or lower expansion too. In past many years, different types of appliances have been made. These types are: tissue-borne, tooth-borne, slow maxillary expansion, rapid maxillary expansion, and bone-anchored.
Rapid palatal expansion (RPE) or Rapid Maxillary Expansion (RME) is an expansion technique where expansion of 0.5 mm to 1 mm is achieved each day until the posterior crossbite is relieved. The expander works by turning a key inside the center of the expander. The turn of this key will push the arms of the expander.
SARPE is performed to address the transverse dimension changes in a patient. Sometimes this surgery is followed by Le Fort 1 in a second surgery to address the vertical and the anterior-posterior changes. Between the two surgeries, a patient's constricted maxillary arch is expanded with the rapid maxillary expander device placed in the maxilla.
The second category uses the principles of osteodistraction and osteotomies to facilitate correction of often severe malocclusions, such as rapid maxillary expansion to correct a narrow maxilla or closure of large clefts in cleft palate patients. [9]
(Amazon) (Amazon) "I've bought a number of outlet expanders over the years and the early ones were terrible. Big, bulky, ugly and only added an extra outlet spot or two," said one fan .
A removable appliance is usually used by patients who have high degree of compliance with their orthodontic treatment. Fixed appliances are able to produce very accurate movement in the teeth [1] [2] Both fixed and removable functional appliances can be used to correct a malocclusion in three planes: Anterior-Posterior, Vertical and Transverse.
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