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The first image is bright and photographic, levels 2 through 4 show increasingly simpler and more faded images, and the last—representing complete aphantasia—shows no image at all. Aphantasia (/ ˌ eɪ f æ n ˈ t eɪ ʒ ə / AY-fan-TAY-zhə, / ˌ æ f æ n ˈ t eɪ ʒ ə / AF-an-TAY-zhə) is the inability to visualize. [1]
Hyperphantasia is the condition of having extremely vivid mental imagery. [1] It is the opposite condition to aphantasia, where mental visual imagery is not present. [2] [3] The experience of hyperphantasia is more common than aphantasia [4] [5] and has been described as being "as vivid as real seeing". [4]
It can also be used in adults, although expansion is more uncomfortable and takes longer in adults. A patient who would rather not wait several months for the end result achieved by a palatal expander may be able to opt for a surgical separation of the maxilla. Use of a palatal expander is most often followed by braces to then straighten the teeth.
Upper and Lower Jaw Functional Expanders. There is a totally different orthodontics approach without extraction and pain, is called functional orthodontics, the functional orthodontic technology is different and called functional appliance, that is an appliance that produces all or part of its effect by altering the position of the mandible/maxilla.
Clear-aligner treatment involves an orthodontist or dentist, or with home-based systems, the person themselves, taking a mold of the patient's teeth, which is used to create a digital tooth scan. The computerized model suggests stages between the current and desired teeth positions, and aligners are created for each stage.
The fitting process can vary between different types of braces, though there are similarities such as the initial steps of moulding the teeth before application. For example, with clear braces, impressions of a patient's teeth are evaluated to create a series of trays, which fit to the patient's mouth almost like a protective mouthpiece.
Unlike braces, headgear is worn partially outside of the mouth. An orthodontist may recommend headgear for a patient if their bite is more severely out of alignment. The device typically transfers the force to the teeth via a facebow or J hooks to the patient's dental braces or a palatal expander that aids in correcting more severe bite ...
The second type of jaw wiring is called orthodontic jaw wiring (OJW) or dental jaw wiring, [9] and can be used as a treatment for obesity and compulsive overeating. In this procedure, a dentist or orthodontist attaches braces to certain teeth (typically the canines and premolars ) and inserts wiring, but not elastics, between the upper and ...