title: Adolescent patient with bilateral crossbite treated with surgically assisted rapid maxillary expansion: a case report evaluated by the 3d laser scanner, and using FESA method.
abstract: Our purpose in this case report is to present an orthodontic treatment           obtained and the results achieved in 17-year-old white female patient with Angle           Class II malocclusion and bilateral posterior crossbite. Patient was treated with           bonded acrylic Hyrax appliance and surgically assisted rapid maxillary expansion           (SARME). The multiloop system 0.16 TMA (ß titanium) arch wire was used in the           alignment phase and on purpose to prohibit bite opening and optimize threedimensional           movement control. After treatment bonded lingual retainers were           placed in between maxillary central incisors and in mandible canine-to-canine.           A functional removable Klammt appliance was used for retention. The 3D           Laser Scanner Roland LPX-250 was used in order to obtain digital dental casts.           Evaluation of the treatment results was measured on these models and using finite           element scaling analysis (FESA). An Angle Class I relationship was obtained after           2½ years of treatment, function and facial aesthetics were improved. The shape of           the palate changed significant in the width direction, not significantly in length and           high direction. The greatest expansion of palate was found in the region between           the palatal cusps of the first molars 26.6%, followed by first 21.9% and second           premolars 16.5%. SARME in adult patients with bilateral cross bite and maxillary           deficiency lead to satisfactory results. The 3D laser scanned models and their           measurements, using advanced software's are successfully used for precise           studies.
authors.affiliation: Department of Paediatrics Stomatology, Second Faculty of Medicine, Charles University in Prague and University Hospital Motol, Prague, Czech Republic. ivanov@orthoprague.cz
authors.forename: Ch I
authors.initials: ChI
authors.lastname: Ivanov
authors.forename: J
authors.initials: J
authors.lastname: Velemínská
authors.forename: T
authors.initials: T
authors.lastname: Dostálová
authors.forename: R
authors.initials: R
authors.lastname: Foltán
mesh_terms: D000293:Adolescent; D005260:Female; D020342:Finite Element Analysis; D006801:Humans; D021621:Imaging, Three-Dimensional; D007834:Lasers; D008310:Malocclusion / Q000473:pathology / Q000628:therapy*; D018704:Orthodontic Retainers; D010155:Palatal Expansion Technique