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    Effects of Time Delay on Degree of Conversion of Contemporary Orthodontic Band Adhesives
    (Aves Press Ltd, 2013) Corekci, Bayram; Toy, Ebubekir; Malkoc, Siddik; Ozturk, Bora; Gunduz, S. Beniz
    Objective: For prolonged use in the oral cavity, orthodontic band adhesives should have certain physical properties to ensure the best clinical performance. The degree of conversion (DC) of orthodontic band adhesives has been found to affect their mechanical properties. The aim of this study was to investigate the effects of time delay on the DC of orthodontic band adhesives. Materials and Methods: Fourier-transform infrared spectroscopy was used to evaluate the DC of 3 adhesives (Bisco Ortho Band Paste LC, Multi Cure Glass Ionomer Band Cement, Transbond Plus Light Cure Band Adhesive) immediately after they had been polymerized and stored in artificial saliva at 37 +/- 1 degrees C for 30 days. Thirty disc-shaped specimens (10 for each adhesive) were fabricated in Teflon molds (6.0 x 1.0 mm). The samples for each adhesive were divided further into 2 groups (n=5). Results: The DC was significantly influenced by the band adhesive type (p < 0.05), and there were significant differences among band adhesive types for the DC after 30 days. Conclusion: The value of the DC could change with time delay.
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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.
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    Physical Properties of Different Orthodontic Composites
    (Aves Press Ltd, 2014) Ozturk, Firat; Malkoc, Meral Arslan; Corekci, Bayram; Aksakalli, Sertac; Malkoc, Siddik
    Objective: The aim of this study was to compare the water sorption, solubility, and compressive strength of 3 traditional orthodontic composites and 1 flowable composite after 1, 7, and 30 days of immersion in water. Materials and Method: The traditional orthodontic composites used in this study were ORTHO Bracket Paste (Bisco, Schaumburg, IL, USA), Transbond XT (3M, Monrovia, CA, USA), and Light Bond (Reliance, Itasca, IL, USA). The flowable composite used was Tetric EvoFlow (Ivoclar Vivadent, Schaan, Liechtenstein). The specimens were subjected to water sorption and solubility tests based on the ISO 4049 and ADA No. 8 requirements. Mechanical tests were performed with an Instron Universal Test Machine. Results: There were no significant differences in solubility among the 4 materials after 1 and 7 days (p > 0.05). Tetric EvoFlow had a lower compressive strength than the traditional orthodontic composites (p > 0.05) and exhibited significantly higher water sorption than the traditional orthodontic composites after immersing them in water for 1, 7, and 30 days (p < 0.001). Conclusion: The results revealed that the flowable composite had higher solubility and water absorption but less compressive strength than the traditional orthodontic composite resins used in this study.