ABSTRACT
The patient was a 9-year-old girl with a skeletal Class II malocclusion characterized by maxillary protrusion, excessive overjet and deep overbite. The patient's maxillary left central incisor was deeply impacted. During the first stage, a lingual arch was employed after surgical exposure. During the secondary stage, all four first premolar teeth were extracted and then edgewise mechanotherapy was performed. The total treatment time was 6 years. The malocclusion was treated satisfactorily and resulted in correction of the esthetic and functional flaws after 1 year out of retention.
Subject(s)
Incisor , Malocclusion, Angle Class II/therapy , Orthodontics, Corrective/methods , Tooth, Impacted/therapy , Cephalometry , Child , Dentition, Mixed , Female , Humans , Malocclusion, Angle Class II/complications , Serial Extraction , Tooth, Impacted/complicationsABSTRACT
The patient was a 22-year-old female with a class III malocclusion characterized by maxillary constriction, dental crowding and mandibular protrusion. The treatment goals which were related to the chief complaints included correction of negative overjet, negative overbite, and dental alignment. Since the pre-existing crowding created some severe problems and prevented adequate posterior repositioning of the mandible and anterior teeth, extraction of the four first premolars were recommended to correct the overjet. This treatment resulted in greater posterior repositioning. The treatment was divided into three stages: 1) extraction of first premolar teeth, alignment, space closure and an increase in the overjet and overbite, 2) arch alignment and detailing of the occlusion with a full fixed appliance, and 3) retainers. At the end of the treatment, the patient had an acceptable dental alignment with a class I molar relationship and an improvement in facial appearance.
Subject(s)
Malocclusion, Angle Class III/therapy , Orthodontics, Corrective/methods , Adult , Bicuspid/surgery , Cephalometry , Female , Humans , Maxilla , Tooth ExtractionABSTRACT
One of the goals of orthodontic treatment is to obtain the best balance and harmony of facial lines, especially it is important to retract the lip in bimaxillary case. A 12-year and 4-month-old boy was first seen with the chief complaint of excessive lips protrusion. We treated him by the edgewise method for 34 months, and evaluated the change of facial profile. Excessive lip protrusion was eliminated, and arch leveled. Overjet and overbite were reduced. Mandibular growth increased the prominence of the chin, and reduce the protrusion of the lower lip.
Subject(s)
Lip/physiopathology , Malocclusion/therapy , Orthodontics, Corrective , Humans , MaleSubject(s)
Malocclusion/therapy , Orthodontics, Corrective/methods , Adolescent , Cuspid , Female , HumansABSTRACT
Application of an incisal bite plane for as little as three d caused a significant increase in the size of the sublingual glands of rats, with some evidence of hyperplasia and hypertrophy of the acinar cells. The enlargement had few effects on salivary secretion, and the gland changes were reversible.
Subject(s)
Orthodontic Appliances , Sublingual Gland/anatomy & histology , Animals , DNA/metabolism , Hypertrophy/pathology , Male , RNA/metabolism , Rats , Rats, Inbred Strains , Sublingual Gland/metabolismABSTRACT
The submandibular glands of rats subjected to application of an incisal bite plane became slightly, but not significantly, enlarged. However, in comparison with control animals, they secreted additional proteins identical with those secreted by glands enlarged by periodic incisor amputation or chronic isoproterenol treatment.
