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1/21. An unusual treatment with sagittal split osteotomy: report of a case involving an odontoma.

    Sagittal split osteotomy is one of the most commonly performed surgical techniques in the world and has been modified by many authors. The efficacy of this operation has been studied by many groups. When performing this surgery, there should be adequate contact of wide, cancellous bone surfaces, which guarantees excellent and rapid bony union in the desired position. In the present article, treatment of mandibular prognathism with open bite by sagittal split osteotomy with an odontoma in the third molar area is presented.
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ranking = 1
keywords = prognathism
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2/21. Fixed prosthodontics in skeletal Class III patients with partially edentulous jaws and age-related prognathism: the basal osseointegration procedure.

    Today, prognathism in the partially or completely edentulous jaw can be treated with endosteal implants and fixed prostheses. The preferred procedure uses basal osseointegration. If the distribution of available bone is favorable, the prosthodontic suprastructures can be loaded early, taking the various phases of bone regeneration into account. Invasive surgical interventions, specifically iliac crest transplants, are rarely indicated and can be avoided in most cases. patients are able to return to their everyday lives within a few days.
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ranking = 5
keywords = prognathism
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3/21. Osseointegrated implants as an adjunct to facemask therapy: a case report.

    Branemark Implants were placed in the zygomatic buttresses of the maxilla in a 12-year and 1-month-old female patient with a Class III malocclusion caused by maxillary growth retardation secondary to repair of a unilateral cleft lip and palate defect. The implants were left to integrate for 6 months followed by placement of customized abutments that projected into the buccal sulcus. Elastic traction (400 g per side) was applied from a facemask to the implants at 30 degrees to the occlusal plane for 14 hours per day for 8 months (ages 12 years and 10 months to 13 years and 6 months). The maxilla moved downward and forward 4 mm rotating anteriorly as it was displaced. The change in the maxillary occlusal plane resulted in a secondary opening of the mandible. There was a 2 degrees increase in the SN-mandibular plane angle and an increase in nasion to menton distance of 9 mm. Clinically, this resulted in an increase in fullness of the infraorbital region and correction of the pretreatment mandibular prognathism. There was an increase in nasal prominence as the maxilla advanced. This contributed to the increase in facial convexity. The secondary dental change frequently seen in standard facemask therapy was avoided. The displacement of the maxilla was stable 1 year beyond cessation of facemask therapy. The patient's midface profile was improved by age of 13 years and 6 months. Details of the clinical procedure and treatment changes are presented.
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ranking = 1
keywords = prognathism
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4/21. Surgical simulation of Class III edentulous patient using a 3D craniofacial model: report of a case.

    A case of edentulous prognathism in a 46-year-old Japanese male is presented. We described the outcome of the patient who underwent simultaneous sagittal splitting ramus osteotomy of the edentulous mandible, interpositional bone graft of severely atrophic edentulous jaws, and delayed placement of titanium implants for reconstruction. We highly recommend performing a surgical simulation using a craniofacial model of the patient's anatomy created using CT image data. The procedure provides almost ideal maxillary and mandibular contours.
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ranking = 1
keywords = prognathism
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5/21. Maxillo-nasal dysplasia, Binder's syndrome: review of the literature and case report.

    A 12-year-old girl with maxillo-nasal dysplasia (Binder's syndrome), featuring maxillary hypoplasia and relative mandibular prognathism, presented with a Class III incisal relationship. Her treatment was managed orthodontically. The principal features of the syndrome and management of these cases is discussed.
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ranking = 1
keywords = prognathism
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6/21. Treatment of severe mandibular prognathism in combination with maxillary hypoplasia: case report.

    We performed a Le Fort I osteotomy and sagittal split ramus osteotomy (Obwegeser-Dal Pont) combined with mandibular anterior segmental osteotomy without tooth extraction for a patient with severe mandibular prognathism accompanied by a hypoplastic maxilla, anterior open bite and normal anterior mandibular vertical dimension. The results of facial appearance and occlusion were excellent. This combined surgical method appears to be satisfactory for treating severe mandibular prognathism with hypoplastic maxilla.
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ranking = 6
keywords = prognathism
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7/21. Thin-plate spline graphical analysis of the mandible in mandibular prognathism.

    The chin cup has been used to treat skeletal mandibular prognathism in growing patients for 200 years. The pull on the orthopedic-force chin cup is oriented along a line from the mandibular symphysis to the mandibular condyle. Various levels of success have been reported with this restraining device. The vertical chin cup produces strong vertical compression stress on the maxillary molar regions when the direction of traction is 20 degrees more vertical than the chin-condyle line. This treatment strategy may prevent relapse due to counter-clockwise rotation of the mandible. In this report, we describe a new strategy for using chin-cup therapy involving thin-plate spline (TPS) analysis of lateral cephalometric roentgenograms to visualize transformation of the mandible. The actual sites of mandibular skeletal change are not detectable with conventional cephalometric analysis. A case of mandibular prognathism treated with a chin cup and a case of dental Class III malocclusion without orthodontic treatment are described. The case analysis illustrates that specific patterns of mandibular transformation are associated with Class III malocclusion with or without orthopedic therapy, and that visualization of these deformations is feasible using TPS graphical analysis.
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ranking = 6
keywords = prognathism
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8/21. Post-operative optimization of gum-chewing kinematics in a prognathic patient.

    Smooth jaw movements during gum chewing, which are defined as those driven by optimally smooth patterns of temporal change in acceleration/deceleration, have been quantified in subjects with acceptable occlusions. This paper reports a case in which significant improvement of the smoothness of masticatory jaw movement was observed following surgical-orthodontic treatment. A patient, who demonstrated a mandibular prognathism, underwent the treatment. The irregularity in acceleration/deceleration of jaw closing movement during gum chewing was quantified by the movement jerk-cost, where the jerk is rate of change in movement acceleration/deceleration. The normalized jerk-costs and results of maximum-smoothness model simulation were compared between jaw movements at pre- and post-treatment stages. The correction of mandibular prognathism and crossbite allowed the patient to close the jaw with wider lateral excursion. Furthermore, smoothness of the jaw closing movements increased significantly and the velocity profile was characterized as similar to that predicted by the kinematic model after treatment. These findings for achievement of 'functional occlusion' that allows the patient to perform smooth and economical jaw closing movements during chewing demonstrate necessity of orthodontic treatment of mandibular prognathism to improve jaw motor function.
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ranking = 3
keywords = prognathism
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9/21. Dentomaxillofacial imaging in proteus syndrome.

    proteus syndrome is a rare condition that involves atypical growth of the bones, skin and head and a variety of other symptoms. Only a few authors have reported on the craniofacial manifestations so far. The authors present a case of a 7-year-old girl with proteus syndrome in which the facial skeleton showed unilateral overgrowth. The analysis of the radiological evaluation revealed a bialveolar prognathism, a skeletal class III, a dolicocephalic growth pattern and a left convex face scoliosis. On the left side, the lesser wing of the sphenoid was elevated and the ethmoidal cell complex was hypertrophic. The left ramus and body of the mandible were enlarged. The asymmetric dental development with a precocious dental age on the affected side was the most striking feature on the panoramic view. early diagnosis and therapy depend on clinical evaluation and imaging. Therefore, further evaluations on the craniofacial features of patients with proteus syndrome are necessary in order to establish a list of characteristic symptoms.
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ranking = 1
keywords = prognathism
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10/21. An enlarged sella turcica on cephalometric radiograph.

    A 28-year-old male presented to the Orthodontic clinic for correction of his anterior crossbite due to mandibular prognathism as a result of pituitary adenoma with acromegaly. A radiographic cephalometric analysis and clinical orthodontic examination were made. This article describes in detail the methods of correcting the magnification of cephalometric linear measurements in sellar dimensions (length, depth and width) from lateral and posteroanterior cephalograms. Cephalometric findings revealed that the sella enlarged in all its dimensions with a deepening of the floor in this acromegalic case. We discuss the radiographic diagnosis of an enlarged sella turcica in intrasellar tumours and also emphasise the dentist's important role in the initial diagnosis of pituitary adenoma cases.
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ranking = 1
keywords = prognathism
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