1/56. Accuracy of integration of dental casts in three-dimensional models.PURPOSE: This study investigated errors occurring in three-dimensional (3D) models when plaster dental casts are integrated into them. MATERIALS AND methods: Three-dimensional milling models of three patients with a jaw deformity were fabricated using the Endoplan system (SPARC International Inc, Santa Clara, CA). After this, plaster dental casts were integrated into the 3D models using a face-bow transfer system. Two cephalograms were then compared, one obtained from the patient and the other obtained from the 3D model painted with contrast medium. RESULTS: In two cases, the reproducibility of the dental position as determined by angle analysis was within 2 degrees, and that determined by distance analysis was within 2 mm. However, errors over 4 degrees and 4.2 mm, respectively, were observed in one case. CONCLUSION: It is clinically important to confirm the accuracy of the 3D model by cephalometric analysis, and it may be necessary to reposition the dental model based on the results.- - - - - - - - - - ranking = 1keywords = dental (Clic here for more details about this article) |
2/56. Treatment of mandibular prognathism in an acromegalic patient.A 41-year-old man with acromegaly underwent cryosurgery for a pituitary adenoma. Although soft tissue regression is possible after pituitary ablation, bony changes are permanent. Thus, bilateral vertical osteotomies and bilateral coronoidotomies were performed for correction of the mandibular prognathism. The postoperative occlusion and facial profile were very acceptable. Unfortunately, the patient died of a myocardial infarction eight days postoperatively.- - - - - - - - - - ranking = 0.026465460877557keywords = occlusion (Clic here for more details about this article) |
3/56. Complete breakage of three-dimensional miniplates: unusual complication of osteosynthesis after sagittal split osteotomy. Two case reports.We describe two cases in which three-dimensional miniplates broke after bilateral sagittal split osteotomy. The miniplates broke vertically and the cause was suspected to be excessive shear force on the osteotomy line because of unstable occlusion. In patients with unstable postoperative occlusions the osteosynthesis should be bicortical.- - - - - - - - - - ranking = 0.052930921755114keywords = occlusion (Clic here for more details about this article) |
4/56. ellis-van creveld syndrome: dental, clinical, genetic and dermatoglyphic findings of a case.Dental, clinical, genetic and dermatoglyphic findings of an additional female case with ellis-van creveld syndrome (EVC) are presented and compared with those of the cases cited in the literature. The dermatoglyphics of the case was remarkable.- - - - - - - - - - ranking = 0.5keywords = dental (Clic here for more details about this article) |
5/56. The reconstruction of bilateral clefts using endosseous implants after bone grafting.This article presents the orthodontic reconstruction of an adult bilateral cleft patient with a severe Class III malocclusion in which endosseous implants were inserted after secondary alveolar bone grafting. The patient was a 21-year-old Japanese male whose lateral incisors were congenitally missing and whose premaxilla was inclined lingually. The occlusion was classified as Angle Class III with an overjet of -8 mm. Orthodontic alignment was initiated to correct the position of the maxillary incisors before bone grafting. After the anterior occlusal relationship was corrected, bilateral alveolar clefts were reconstructed by bone grafting with autogenous particulate marrow and cancellous bone harvested from the iliac crest. ITI-SLA fixtures (Institute Straumann, Waldenburg, switzerland) (length, 10 mm; diameter, 4.1 mm) were placed into the grafted bone for prosthetic restoration of the missing lateral incisors. The results illustrate that this protocol can be expected to provide an acceptable occlusion and good dentoalveolar stability in adult cleft patients.- - - - - - - - - - ranking = 0.079396382632671keywords = occlusion (Clic here for more details about this article) |
6/56. Developmental absence of the premolar teeth: dental management.A boy aged 11 years presented with dental pain, several carious teeth and a localized area of acute necrotizing ulcerative gingivitis (ANUG). Developmental absence of the premolar teeth was notable and additional anomalies included mid-facial hypoplasia, mandibular prognathism, transposed teeth and delayed exfoliation of the deciduous teeth. These abnormalities have significant oral, dental, orthodontic and orthognathic implications.- - - - - - - - - - ranking = 0.75keywords = dental (Clic here for more details about this article) |
7/56. Thin-plate spline (TPS) graphical analysis of the mandible on cephalometric radiographs.We describe two cases of Class III malocclusion with and without orthodontic treatment. A thin-plate spline (TPS) analysis of lateral cephalometric radiographs was used to visualize transformations of the mandible. The actual sites of mandibular skeletal change are not detectable with conventional cephalometric analysis. These case analyses indicate that specific patterns of mandibular transformation are associated with Class III malocclusion with or without orthopaedic therapy, and visualization of these deformations is feasible using TPS graphical analysis.- - - - - - - - - - ranking = 0.052930921755114keywords = occlusion (Clic here for more details about this article) |
8/56. 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.- - - - - - - - - - ranking = 0.026465460877557keywords = occlusion (Clic here for more details about this article) |
9/56. 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.- - - - - - - - - - ranking = 0.17793092175511keywords = dental, occlusion (Clic here for more details about this article) |
10/56. New oral findings in Cohen syndrome.Cohen syndrome is a hereditary disorder transmitted as an autosomal-recessive trait. Approximately 100 cases have been reported in the genetic and pediatric literature. Despite the fact that oral alterations are often observed in these cases, only 1 work has been published addressing this specific topic, and it tended to concentrate on periodontal abnormalities. The present study details 2 new patients, 2 brothers (8 and 11 years old), and mainly consists of an analysis of the dentomaxillary anomalies that until now have not been studied in depth. In this study, the mandible, characterized as hypoplastic in Cohen syndrome, appears to be in a normal position; what really exists is a maxillary hyperplasia of genetic origin. We also put forward an observation hitherto undescribed in the literature: dental agenesis.- - - - - - - - - - ranking = 0.125keywords = dental (Clic here for more details about this article) |
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