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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.
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.
The authors observed skeletal changes of about 3–4mm and these changes were stable. [5] In an earlier study published in 2008, [6] the same authors stated that about one-third of the transverse dental expansion obtained with SARPE is lost, however the skeletal expansion remains the same. They also stated that post-surgical relapse with SARPE ...
In the Anterior-Posterior dimension, appliances such as Class II and Class III are used. Appliances used in transverse dimension are utilized to expand either the maxillary or the mandibular arch. Appliances used in the vertical dimension are used to correct open or deep bite. [3] [4]
Palatal expansion can be best achieved using a fixed tissue-borne appliance. Removable appliances can push teeth outward but are less effective at maxillary sutural expansion. The effects of a removable expander may look the same as they push teeth outward, but they should not be confused with actually expanding the palate.
Orthognathic surgery (/ ˌ ɔːr θ ə ɡ ˈ n æ θ ɪ k /), also known as corrective jaw surgery or simply jaw surgery, is surgery designed to correct conditions of the jaw and lower face related to structure, growth, airway issues including sleep apnea, TMJ disorders, malocclusion problems primarily arising from skeletal disharmonies, and other orthodontic dental bite problems that cannot ...
This type of activator was designed by Hamilton who used the expansion of an arch in this approach. The appliance has a screw in the middle for expansion. The activator is bonded to the maxillary arch and the forward guidance of the mandible can happen due to the lingual flanges of the appliance.
The average showing of the incisors when the lips are at rest is 1/3 of its clinical crown height. With maxillary excess, more than 1/3 of the incisors would show. When the patient smiles, maxillary excess would manifest as the entire clinical crown and a portion of the gums showing as well. [42] This is regarded as a ‘gummy smile.’
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