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Abstract Book Abstract Book Contents Clinical Posters – Atrium, Level 0 ............................................................................................................................... 1 Houston Posters – Platform 5 Café, Level 1 ............................................................................................................. 55 Scientific Posters - SP01-SP175: Platform 5 Café, Level 1; SP176-SP488: Lomond Suite, Level 0 ........................... 59 The authors of abstracts marked *** have indicated a financial interest. The authors of abstracts marked ‡‡‡ have failed to indicate whether or not they have a financial interest. Clinical Posters – Atrium, Level 0 CP 01 ORTHODONTIC TREATMENT OF A PATIENT WITH PEG-SHAPED MAXILLARY LATERAL INCISORS Şirin Rabia Adışen1, Rifat Selçuk Garipbaş1, Türkan Sezen Erhamza1, Berat Serdar Akdeniz1, Ferabi Erhan Özdiler2, 1Kırıkkale University and 1Ankara University, Turkey AIMS: Patients with malformed maxillary lateral incisors can be successfully treated by restoring the lateral incisors. The purpose of this case report is to present the treatment of peg-shaped lateral incisors with composite restoration. SUBJECT AND METHOD: A 12-year-old female with the main complaint of crowding in the dental arch that resulted in an aesthetic problem. The patient had a skeletal and dental Class II malocclusion. She had moderate crowding in both arches and bilateral peg-shaped maxillary lateral incisors. The maxillary first molars were also rotated. After correcting the molar rotation with a transpalatal arch, 0.018 inch slot Roth brackets were bonded on the upper and lower teeth. The maxillary peg-shaped lateral incisors were reformed with composite restoration after the debonding. RESULTS: Good aesthetics and adequate function were obtained after 2 years 4 months of fixed orthodontic treatment and composite restoration of the peg-shaped lateral incisors. CONCLUSION: Peg-shaped lateral incisors may cause aesthetic problems. Aesthetic results can be improved for shape anomalies of anterior teeth especially when the treatment is managed in a multidisciplinary manner. CP 02 ORTHODONTIC TREATMENT OF A PATIENT WITH ECTOPIC ERUPTION OF THE MANDIBULAR LATERAL INCISOR: A CASE REPORT‡‡‡ Rifat Selcuk Garipbas1, Türkan Sezen Erhamza1, Ferabi Erhan Özdiler2, 1Kirikkale University and 2Ankara University, Turkey AIMS: To present the orthodontic treatment of a patient with ectopic teeth. SUBJECT AND METHOD: An 11-year-old male with the complaint of dental impairment. In the clinical and radiological examination, the patient had an ectopic lateral and an impacted canine. Buttons and brackets were applied to palatal and facial aspect of the lower right lateral. Elastic threads and elastic chains were used to 1 reposition the teeth. Orthodontic force was applied to teeth from a hook on the lingual arch and lower right molar; afterwards the canine erupted spontaneously. The patient was followed for 24 months. RESULTS: The teeth were moved to an ideal position in the dental arch without root resorption or periodontal problems. CONCLUSION: Acceptable aesthetics and function were provided by extracting the primary teeth and levelling the permanent successors. CP 03 CLASS III SKELETAL MALOCCLUSION COMPENSATION: A CASE REPORT Betul Akyildiz, Berza Yilmaz, Department of Orthodontics, Bezmialem Vakif University Faculty of Dentistry, Istanbul, Turkey AIMS: Class III malocclusions are anomalies that are easily recognized by lay people, and patients often seek treatment. Many adult patients refuse surgical correction and want only fixed orthodontic treatment. This case report presents the compensation treatment of a patient with severe crowding and a Class III skeletal malocclusion. SUBJECT AND METHOD: A 15-year-old male applied for treatment of a maxillary transverse deficiency, negative overjet and open bite tendency. Clinical examination showed a 2 mm negative overjet, 0 mm overbite and an Angle Class III canine and molar relationship on both sides. Cephalometric analysis showed a skeletal Class III malocclusion with bimaxillary retrognathia (SNA: 76.2°, SNB: 76.9°, ANB: –0.7°, Wits: –5.1 mm). The upper incisors were normally inclined (U1-SN: 100.3°, U1-PP: 111.4°) whereas lower incisors were retroclined (IMPA: 84.0°). He had a convex profile, incompetent lips, a high angle growth pattern and severe crowding in both arches (maxilla: –8.1 mm, mandible: –11.9 mm). The treatment plan included fan-type rapid maxillary expansion followed by lower first premolar extractions. RESULTS: A Class I canine relationship was achieved after 30 months of treatment. The anterior crossbite and transverse discrepancy were corrected. The patient's smile was improved. Sufficient overbite was provided. CONCLUSION: Lower premolar extractions can be considered an effective treatment alternative in compensation cases. CP 04 INTRUSION OF OVERERUPTED MAXILLARY MOLARS WITH MINISCREWS: A CASE REPORT Betul Akyildiz, Berza Yilmaz, Department of Orthodontics, Bezmialem Vakif University Faculty of Dentistry, Istanbul, Turkey AIMS: Loss of the mandibular first molar often results in overeruption of the antagonist maxillary first molar, making it harder to restore the edentulous space. Correction of the overerupted molar is a first and essential step before other procedures. The purpose of this case report is to illustrate the intrusion of overerupted maxillary molars using two orthodontic miniscrews prior to prosthetic restoration. SUBJECT AND METHOD: A 40 year old female referred from the prosthodontic department. Her chief complaint were the lower right missing teeth. The mandibular right second premolar, first and second molars had been lost several years earlier. The upper right second premolar and first molar were extending to the lower edentulous area. Two orthodontic miniscrews were placed in the maxillary buccal dentoalveolus and palatal slope. On the buccal side, the miniscrew was inserted between the upper right second premolar and the first molar at the level of the mucuogingival junction. On the palatal side, the miniscrew was inserted between the first and second molars. The miniscrews were immediately loaded with an intrusive force of 100 g using an elastic power- chain. RESULTS: The overerupted teeth were intruded using a segmental-fixed orthodontic appliance combined with skeletal anchorage. As a result of treatment, adequate space was created for an endosseous implant and crown and a correct occlusion was established. 2 CONCLUSION: This case illustrates the clinical effectiveness of mini-implants. Miniscrews are powerful clinical tools to perform molar intrusion. CP 05 SURGICAL ORTHODONTIC TREATMENT OF AN ACROMEGALY PATIENT WITH A SEVERE SKELETAL CLASS III MALOCCLUSION: CASE REPORT Ayca Arman-Ozcirpici1, Duygu Naneci1, Burak Bayram2, Departments of 1Orthodontics and 2Oral and Maxillofacial Surgery, Baskent University, Ankara, Turkey AIMS: Acromegaly is an anomaly caused by the excessive secretion of growth hormone (GH) from the anterior lobe of the pituitary gland (adenohypophysis) after the cessation of growth. The aim of this case report is to present the surgical orthodontic treatment of a case with severe skeletal discrepancy due to acromegaly. SUBJECT AND METHOD: A 33-year-old male acromegaly patient referred with the chief complaint of not being able to chew. He had a concave profile along with distinct frontal and zygomatic bones. Intraoral examination revealed a circular crossbite where only the maxillary molars were in contact with the anterior ridge of the ramus, 21 mm of negative overjet and a 1 mm open bite. Furthermore his lower left second premolar was missing and he had an aesthetically unpleasing upper incisor prosthetic restoration. According to the cephalometric analysis, ANB angle was –31 degrees and GoGnSN angle 2 degrees. Proclination of the upper incisors and retroclination of the lowers were evident and compatible with the compensation mechanism seen in Class III patients. The treatment plan consisted of fixed orthodontic treatment for decompensation of incisor inclinations followed by two-jaw surgery (10 mm advancement and 1 mm impaction of the maxilla, 14 mm set- back of the mandible). Post-orthodontic prosthetic rehabilitation of the upper incisors and lower left second premolar was performed. RESULTS: At the end of treatment the skeletal Class III malocclusion was corrected, the overjet and overbite were normalized, and a functional and stable occlusion was achieved. As the patient was satisfied with the overall result, he did not need to proceed with frontal bone or zygomatic reshaping. CONCLUSION: A challenging skeletal condition both for the patient and dental health professionals was successfully treated with an orthodontic, surgical and prosthetic approach. CP 06 CONE BEAM COMPUTED TOMOGRAPHIC EVALUATION OF THE EFFECTS OF ORTHODONTIC EXTRUSION ON ALVEOLAR BONE Ivan Arsic, Nenad Nedeljkovic, Zorana Stamenkovic, Marija Milutinovic, Dragana Jovanovic, Clinic of Orthodontics, Faculty of Dentistry, University of Belgrade, Serbia AIMS: To evaluate the effect of orthodontic extrusion on the height and width of alveolar bone and the dimension of the interdental septum of the extruded tooth. SUBJECTS AND METHOD: Three adult females with crowding and infraposition of the upper or lower canines. Each patient was treated by fixed multibracket appliances, with previous extraction of premolars. Extrusion forces were applied during the levelling phase of treatment, and continued until extrusion of the upper
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