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    Mandibular corpus horizontal distraction in an edentulous case and its effects on the contralateral coronoid processus-arcus zygomaticus relation
    (2015) Karabekmez, Furkan Erol; Irgin, Celal; Günbey, Leman Karabekmez; Duymaz, Ahmet
    Interaction between the coronoid processus and the arcus-zygomaticus on contralateral hemi-mandible often drops off the radar in case of distraction osteogenesis of the mandibular corpus. We presented a 42 years old male without any teeth applied to hospital for facial asymmetry, short hemi-mandible and chewing problems. 2D and 3D computerized tomography and stereo-lithographic models were used for planning, predicting possible movements on the contralateral condyle and anticipate the relation of contralateral coronoid process the with zygomatic arc. Maximum safe amounts of distraction were calculated with cooperation with orthodontics and radiology. The rotation angle on the axis of the contralateral condyle is calculated in order to measure the defect to be corrected to take the maxillary and mandibular midlines to the same plane. Total calculated defect were shortened for preventing any interaction between the coronoid processus and the arcuszygomaticus on contralateral hemi-mandible. Patient was satisfied and started to use new dentures two months after removal of the distraction device. In order to achieve successful distraction without any problem regarding to opposite side rotation angles of the condyle, and position changes in the coronoid processus, collaboration and multidisciplinary approach are essential with orthodontics and radiologist in case of unilateral mandibular corpus distraction.
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    Periodontally Accelerated Molar Distalization With Miniscrew Assisted Memory Screw: A Pilot Study
    (Aves Press Ltd, 2013) Corekci, Bayram; Irgin, Celal; Halicioglu, Koray; Hezenci, Yasin; Dursun, Saffet; Ozan, Fatih
    Objective: To examine the treatment effects of a miniscrew assisted memory screw system supported by piezoincision for the noncompliance molar distalization of maxillary first molars in patients with Class II malocclusion. Materials and Method: Nine subjects with skeletal Class I dental Class II malocclusion were treated. An anchorage unit was prepared using two miniscrew that were placed just behind a line connecting the first premolars at the mesial contact point. The memory expansion screw (500 g), and two miniscrews placed parallel to the occlusal plane provided stable, 4-point support for the appliance. Piezoincision was performed immediately after the appliance as cemented. Four midlevel incisions were made under local anesthesia between the roots of the teeth on the buccal side of the maxillary alveolar bone from the mesial first premolar to the second molar. A 3-mm piezoelectrical corticotomy was then performed by inserting the tip of Piezotome into each of these openings. Screw activation was started the following day. Skeletal and dental changes were measured on cephalograms, and dental casts were obtained before and after distalization. Results: Upper first molars were successfully distalized in approximately 4.6 months and the mean distalization at the end was 4.98 mm. The average distal tipping of the upper first molars was 7.75 degrees. No statistically significant changes were noted in the sagittal position of the maxilla or in the position of the upper incisors as a result of treatment. The maxillary first molars also moved palatinally (1.13 mm), but no significant distal rotation occurred. Conclusion: This system provided an efficient distalization method for posterior teeth and showed no anchorage loss. Molar tipping and palatal movement were observed as side effects in the patients.