1/9. Laser irradiation inhibition of open gingival embrasure space after orthodontic treatment.The purpose of this study was to investigate the inhibitory effect of low-energy laser irradiation on an incidence of open gingival embrasure space after orthodontic treatment. The patient was a 20-year, 7-month-old Japanese female with an Angle Class I malocclusion and crowding in the mandible. Treatment consisted of extraction of maxillary and mandibular first premolars and use of the Edgewise technique. A Ga-Al-As diode laser was used to irradiate an area of 0.5 cm2 at the labial and lingual gingival papilla between the canines. The time of exposure was 6 minutes for 3 days, carried out between the relevelling and en masse stages of movement. The total energy corresponding to 6 minutes of exposure varied from 1.90 J/cm2. There was no further evidence of open gingival embrasure space, except at the mandibular central incisor. Further: an improvement in the gingival inflammation caused by a periodontal disease was observed, and periodontal pocket depth was maintained. These results suggest that low-energy laser irradiation may inhibit the incidence of open gingival embrasure space after orthodontic treatment.- - - - - - - - - - ranking = 1keywords = mandible (Clic here for more details about this article) |
2/9. Multiple supernumerary teeth in association with malocclusion: report of two cases.Although multiple supernumerary teeth without any associated syndromes are rare, their occurrence can create a variety of clinical problems such as derangement of the occlusion, prevention of eruption of permanent teeth, damage to adjacent teeth, cystic degeneration and root resorption. Hence, clinical and radiographic evaluation of patients should always be thorough in order to detect their presence. Furthermore, because the clinical management of multiple supernumerary teeth poses a great challenge to clinicians, timely, appropriate consultation and interdisciplinary approach to treatment is extremely important. We report two cases, a 14 year-old boy with eight and a 13-year-old girl with seven supernumerary teeth not associated with syndromes. In the boy, the teeth were bilaterally distributed in all quadrants in the premolar regions, and in the girl they were distributed bilaterally in the premolar regions in the mandible and bilaterally distal to the upper third molars. The clinical implications and management are discussed.- - - - - - - - - - ranking = 1keywords = mandible (Clic here for more details about this article) |
3/9. Long-term outcome in a patient with Class I malocclusion with severe crowding treated without extractions.The treatment of a patient with a Class I malocclusion with significant skeletal transverse maxillary discrepancy and severe crowding is presented. The maxilla was narrow compared with the mandible, and the posterior teeth were compensated, with the maxillary teeth inclined buccally and the mandibular teeth inclined lingually. Treatment included rapid palatal expansion to correct the transverse maxillary deficiency and to gain arch length. Long-term follow-up (20 years) with a stable result is reported.- - - - - - - - - - ranking = 1keywords = mandible (Clic here for more details about this article) |
4/9. Definitive surgical correction of the deformity resulting from hemimandibular hyperplasia.INTRODUCTION: The asymmetric deformity of the mandible resulting from the rare condition of hemimandibular hyperplasia has posed a challenge for aesthetic surgical correction. The literature relating to this condition is reviewed and the results of treatment in a series of patients described. MATERIAL AND methods: A series of treated patients is reviewed and the results of surgery illustrated and discussed. A maxillary Le Fort I osteotomy is first performed where levelling of the occlusal plane is required. The mandibular surgical technique commences with an extended sagittal ramus osteotomy with dissection of the inferior dental neurovascular bundle completely free of the mandible up to and including the mental foramen. The proximal fragment is then rotated cranially leaving undisturbed the soft tissue attachments at the inferior border, with corresponding bone reduction at the upper border. The inferior border of the distal fragment is then reduced to match the new position of the lower border of the proximal fragment, the neurovascular bundle repositioned, and rigid fixation applied. Finally, a straightening genioplasty is performed. RESULTS: It was possible to overcome the technical and anatomical difficulties associated with correction of this hemimandibular deformity and to achieve a good aesthetic result with acceptable facial symmetry when applying this surgical technique in 3 patients. CONCLUSION: Hemimandibular hyperplasia can be surgically corrected with good aesthetic and functional results and minimal morbidity.- - - - - - - - - - ranking = 2keywords = mandible (Clic here for more details about this article) |
5/9. Chincup therapy for a young woman with anterior displacement and obtuse angle of the mandible in Class I malocclusion.INTRODUCTION: Dolichofacial skeletal patterns are a challenge for the orthodontist. Even when treatment for a long-face patient begins before the adolescent growth spurt, excellent compliance is generally needed. The patient whose care is presented here started treatment at age 14. RESULTS: The extraction of 4 premolars, rapid palatal expansion, and excellent compliance wearing a combination occipital and vertical-pull chincup over a 2-year period led to good results at age 16, with minimal dental or skeletal relapse at age 18 years 5 months.- - - - - - - - - - ranking = 4keywords = mandible (Clic here for more details about this article) |
6/9. A new protocol of Tweed-Merrifield directional force technology with microimplant anchorage.Tweed-Merrifield directional force technology with microimplant anchorage is a useful treatment approach for a patient with a Class I or Class II dentoalveolar-protrusion malocclusion. It can create a favorable counterclockwise skeletal change and a balanced face without patient compliance. In contrast, headgear force with high-pull J-hook can obtain similar results but depends on patient cooperation. This case report presents the treatment of a patient with Class I canine and molar relationships, a convex profile with retrognathic mandible and marked lip protrusion, and excessive lower anterior facial height. Good facial balance was obtained by Tweed-Merrifield directional force technology with microimplant anchorage, which provided horizontal and vertical anchorage control in the maxillary and mandibular posterior teeth, and intrusion and torque control in the maxillary anterior teeth, resulting in a favorable counterclockwise mandibular response.- - - - - - - - - - ranking = 1keywords = mandible (Clic here for more details about this article) |
7/9. Two cases of skeletal open bite treated by sagittal splitting osteotomy of the mandibular ramus--a comparison between successful treatment and subsequent relapse.Sagittal split-ramus osteotomy was performed on two patients with severe open bite due to Class I malocclusion. The original open bite was -9 mm in case 1 and -6 mm in case 2. After presurgical orthodontic treatment, these values were changed to -7 mm and -8 mm, respectively. The surgical procedure for treating these patients required mobilization of the mandible to close the open bite. The operation was successful in one case, but partial relapse occurred in the other during retention. The factors leading to the relapse were considered by comparison between the two cases.- - - - - - - - - - ranking = 1keywords = mandible (Clic here for more details about this article) |
8/9. Orthopedic/orthodontic treatment of a Class I malocclusion with a Class III skeletal pattern and maxillary deficiency. An American Board of orthodontics case report.A case report of a Class I dental malocclusion superimposed on a Class III skeletal pattern with normal mandible and underdeveloped maxilla is presented. The patient was a 15-year-old girl whose statural growth was complete. The maxilla was deficient in anteroposterior and transverse dimensions, causing a slightly concave profile, a crossbite relationship of most of the anterior and posterior teeth, and upper anterior crowding. Sutural expansion and orthopedic advancement of the maxilla was used to reduce the maxillary deficiency. A complete 0.018-inch slot straight-wire appliance was used to align the teeth, close lower spaces, and detail the occlusion.- - - - - - - - - - ranking = 1keywords = mandible (Clic here for more details about this article) |
9/9. Dental root agenesis secondary to irradiation therapy in a case of rhabdomyosarcoma of the middle ear.There have been only a few published reports on the dental-facial effects of radiation therapy and the subsequent oral management of these patients. A case involving a 13-year-old black male patient with a history of rhabdomyosarcoma is presented. The patient received 4,050 rads of radiation to the right middle ear when he was 2 years of age. His residual medical and dental difficulties are apparently complications from the initial therapy. Examination of the oral cavity revealed bimaxillary micrognathia and marked loss of vertical dimension. A Class II facial profile with Class I molar relationship was observed. The mandible was thin and hypoplastic, with a small knife-edge alveolar ridge. The remaining eighteen erupted permanent teeth were very mobile, and root development had ceased after only initial formation. All of the teeth except the first permanent molars were extracted, and immediate partial dentures were inserted at the time of surgery. A discussion of therapeutic considerations follows the case report.- - - - - - - - - - ranking = 1keywords = mandible (Clic here for more details about this article) |