Biomedical subjects

A Osman Bengi

Publications and source records attributed to A Osman Bengi.

6 recordsLinked to original sources

PubMed2006

Use of zygomatic anchors during rapid canine distalization: a preliminary case report.

Rapid canine distalization is a technique involving periodontal ligament distraction. The primary aim of this technique is to distalize the canines without anchorage loss and to shorten the duration of orthodontic treatment. After the rapid canine distalization, the healing process of the periodontal ligament is similar to rapid palatal expansion and requires a consolidation period. The long consolidation period of the technique conflicts with the second aim. Skeletal anchorage systems seem to compensate for this conflict because they can be also used for retraction of incisors during consolidation period. This case report presents the orthodontic treatment of a 16-year-old female, who had a bimaxillary retrusion and a dental Class II division I malocclusion. Upper first premolars were extracted and, while the canines were being distalized rapidly by periodontal ligament distraction, the incisors were retracted using a zygomatic anchorage system. The treatment of the patient was completed in five months without any anchorage loss.

Adolescent↗

PubMed2006

Dynamic MRI evaluation of tongue posture and deglutitive movements in a surgically corrected open bite.

Tongue thrust usually develops in the presence of anterior open bite in order to achieve anterior valve function. In the literature, tongue thrust is described both as the result and the cause of open bite. If it is an adaptation to malocclusion, then tongue posture and deglutitive tongue movements should change after treatment. In this case report, an adult who had skeletal open bite and Class II malocclusion caused by mandibular retrusion was treated surgically. The mandible was advanced in a forward and upward direction with a sagittal split osteotomy. The open bite and Class II malocclusion were corrected and an increase in the posterior airway space (PAS) was observed. Pretreatment and posttreatment dynamic magnetic resonance imaging (MRI) revealed that tongue tip was retruded behind the incisors and contact of the tongue with the palate increased. It was also determined that the anterior and middle portions descended, whereas the posterior portion was elevated at all stages. Advancement of the mandible, correction of open bite, and an increase in PAS affected not only the tongue posture and deglutitive movements, but also the breathing pattern of the patient.

Adult↗

PubMed2005

Dentofacial effects of asymmetric headgear and cervical headgear with removable plate on unilateral molar distalization.

Cervical headgear (CHG) is used widely in the treatment of Class II anomalies. Asymmetric headgear (AHG) is an alternative treatment for the correction of unilateral Class II dental relationships. The purpose of this investigation was to compare the effects of AHG with those of a CHG combined with a removable plate in unilateral first molar distalization. The study consisted of 20 patients with unilateral Class II molar relationship (12 girls and eight boys). One group of 10 patients was treated with an AHG, and a second group of 10 patients was treated with a CHG and a removable plate. Lateral cephalograms and basilar radiographs were taken before and after molar distalization. It was found that distalization and distal tipping of molar on the passive side was less in the CHG and removable plate (CHG-RP) group. Distalization and distal tipping of the second premolar on the distalization side was also reduced in this group. Incisors were retruded in both groups but were retruded more in the CHG-RP group.

Adolescent↗

PubMed2005

Mandibular distraction with MD-DOS device.

Distraction osteogenesis is an alternative treatment method for the correction of mandibular hypoplasia. In this case report, mandibular distraction with a dynamic osteosynthesis system (MD-DOS) was performed to gradually lengthen the mandible of a patient who had a severe hypoplastic mandible. The patient underwent intraoral bilateral mandibular distraction osteogenesis. The latency period after the operation was seven days. The distraction was performed three times daily for 14 days at the rate of 0.33 mm each time. Subsequent retention was nine weeks. The patient's mandible was elongated successfully and a satisfactory profile and occlusion was achieved.

Adult↗

PubMed2004

Rapid canine distalization using distraction of the periodontal ligament: a preliminary clinical validation of the original technique.

The process of rapid canine distalization through the distraction of the periodontal ligament is similar to the process in the midpalatal suture during rapid palatal expansion. Rapid canine distalization can be achieved in three weeks with this technique. The aim of this research was to evaluate the effects of rapid canine distalization on dentoalveolar tissues during the rapid distalization of canine teeth with semirigid, individual tooth-borne distractors. The study was carried out on 43 canine teeth in 18 (seven male and 11 female) patients who required first premolar extractions. The mean age of the patients was 16.7 years. The second premolars and first molars were used as anchor units. Orthodontic models, cephalometric and panoramic radiographs, and standard photographs of all the patients were taken before treatment and after the consolidation period. Periapical radiographies of the canines and anchor units were obtained once a week during the distalization period. The distractors were activated 0.25 mm three times a day, and the canines were distalized efficiently an average of three weeks. The within-group differences were evaluated with the Wilcoxon test. The maxillary canines were distalized an average of 5.76 mm with 11.47 degrees distal tipping. The maxillary first molars moved mesially 0.56 mm and extruded 0.64 mm. The maxillary incisors showed 1.44 degrees of palatal tipping. The mean distal movement of the mandibular canines was 3.5 mm with 7.16 degrees distal tipping. Anchorage loss was not observed in the mandibular first molars.

Adolescent↗

PubMed2004

Premaxillary distraction osteogenesis with an individual tooth-borne appliance.

Distraction osteogenesis defines a technique of bone generation and osteosynthesis by the distraction of native preexisting bone. The technique offers a promising treatment alternative for patients with maxillary hypoplasia and a retrognathic mandible. In this case report, the steps in the treatment of an 18.2-year-old girl with premaxillary hypoplasia and anterior crossbite are described. The patient was treated with a distraction osteogenesis technique, and premaxillary advancement was performed using an individual tooth-borne distraction device. The surgical operation consisted of a classical segmental maxillary osteotomy carefully respecting the palatal periosteum. The distractor was cemented in the mouth after the surgical procedures. The patient was observed during a seven-day latency period, after which the device was activated 0.5 mm every 12 hours. The anterior crossbite was eliminated in one week, and the treatment was finished with fixed orthodontic appliances.

Adolescent↗