Browsing by Author "Ozlu, Fethiye Cakmak"

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Citation Count: 5
Efficiency and Accuracy of Three-Dimensional Models Versus Dental Casts: A Clinical Study
(Galenos Publ House, 2019) Yilmaz, Hakan; Ozlu, Fethiye Cakmak; Karadeniz, Carmen; Karadeniz, Ersan Ilsay
Objective: The aim of this study was to compare the accuracy of digital and plaster model methods and the time required for analysis. Methods: A total of 30 subjects (20 females, 10 males; mean age, 14.36 +/- 6.30 years), who required plaster models for the construction of either a fixed or a removable orthodontic appliance, were randomly selected. As part of the diagnostic records, digital impressions with a three-dimensional (3D) intra-oral scanner (TriosColor-P13 Shape) were taken from all subjects. Conventional impressions for the orthodontic appliances were taken with alginate (Orthoprint, Zhermack, Italy), and the plaster models were obtained (Scheu-Dental, GmbH.D-58642, Iserlohn, Germany). Two groups were formed. In the conventional measurement group, manual measurements were taken on the plaster models, while in the digital measurement group, the 3Shape OrthoAnalyzer 2013 software was used to make the measurements on the 3D models. In both groups, the total time required to perform the Bolton analysis and space analysis was recorded, and the results were compared. Results: There was no statistically significant difference found between the two groups in terms of the measurement values. The total time to perform all the analyses was determined to be shorter with digital models compared to conventional plaster models (p<0.001). Conclusion: The Bolton analysis and space analysis measurements carried out on 3D models did not show any statistically significant difference compared to plaster models. The time taken to perform the analyses was shorter using digital models than for conventional plaster models.
Citation Count: 0
Impacted maxillary canines and their relationship with lateral incisor resorption: a cone beam computed tomography (CBCT) study
(Australian Soc Orthodontists inc, 2020) Yilmaz, Hakan; Ozlu, Fethiye Cakmak; Icen, Murat; Icen, Erdi
Objective: The spatial position of a canine can affect the level of proximal root resorption and the success of orthodontic treatment. The aim of this study was to examine the mesiodistal and vertical position of impacted maxillary canines and to assess their relationship with the lateral incisor by using cone beam computed tomography (CBCT). Material and method: One hundred and sixty-nine CBCT scans of patients presenting with maxillary impacted canines were included in the study. The buccopalatal, mesiodistal (classified as sectors I, II, III, IV from distal to mesial) and vertical (cervical, middle, apical) position of the maxillary impacted canines were determined. The positional effect on the morphology (width, length, and depth) and resorption was assessed on the roots of the maxillary lateral incisors. Obtained data were statistically analysed by using Student t-test, the Mann Whitney U and Chi-Square tests. Results: Of the maxillary impacted canines, the 34.72% that had associated resorption on the adjacent lateral incisors were buccally positioned, and 65.28% were palatally positioned. While 45.58% of sector I impacted maxillary canines were buccally positioned, 68.31% of sector IV impacted maxillary canines were palatally positioned. Furthermore, there was a statistical significance between the mesiodistal position and palatal or buccal maxillary canine impaction (p < 0.05). In addition, the vertical position of the impacted maxillary canines was also related to their mesiodistal and buccopalatal positions (p < 0.05). Conclusion: While all maxillary impacted canines had the potential to cause lateral incisor resorption, there was no close relationship related to the canine's buccopalatal, mesiodistal and vertical position. Nevertheless, if an impacted maxillary canine migrated towards the midline, the buccopalatal and vertical position of the tooth changed from buccal to palatal and cervical to apical, respectively.