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    Digital dental models in orthodontics: A review
    (Ondokuz Mayis Universitesi, 2022) Akdeniz, Berat Serdar; Aykaç, Volkan; Turgut, Merve; Çetin, Semanur
    Digital 3 dimensional (3D) dental models are considered one of the most important advancements in modern dental history. Digital dental models are used in diagnosis, treatment planning, and appliance production phases in orthodontics. The present technology of digital dental models reached, and in some points, exceeded the plaster models' accuracy. The use of digital models with CBCT images and rapid prototyping techniques brought the possibility of new treatment techniques, some of which are considered as the future of modern orthodontics. This article aims to review the current use and success of digital 3D models in orthodontic practice. © 2022 Ondokuz Mayis Universitesi. All rights reserved.
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    Digital three-dimensional planning of orthodontic miniscrew anchorage: A literature review
    (Ondokuz Mayis Universitesi, 2022) Akdeniz, Berat Serdar; Çarpar, Yunus; Çarpar, Kübra Arslan
    Orthodontic miniscrews are used for skeletal orthodontic anchorage. An appropriate insertion technique is essential to avoid complications during miniscrew placement. The guides prepared using surface anatomy and 2D radiographs cannot correctly analyze bone volume. Advances in digital 3D medical technologies enabled orthodontists to use digital imaging, digital scanning, and 3D printing to accurately place miniscrews using a surgical guide developed with computer-aided design and manufacturing techniques. The objective of this article was to demonstrate the development of miniscrew placement techniques chronologically and provide brief information about the production, use, and efficiency of modern, digitally planned, and produced miniscrew insertion guides. © 2022 Ondokuz Mayis Universitesi. All rights reserved.
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    Pharyngeal airway space changes and stability following an extended LeFort-I osteotomy advancement in cleft lip and palate and non-cleft lip and palate patients: A long term comparison study
    (Elsevier, 2022) Tekin, Umut; Akdeniz, Berat Serdar; Keller, Eugene E.
    Purpose: The aim of this study was to evaluate effects of extended maxillary advancement osteotomy on pharyngeal airway space (PAS) in mid-facial deficient cleft lip and palate (CLP) patients and mid-facial deficient non-CLP patients. Methods: Pharyngeal airway space (PAS) of 10 CLP and 10 non-CLP patients with the mean age of 19 years 10 months was measured on digitized lateral cephalograms taken shortly before maxillary advancement operation with Quadrangular Le Fort I osteotomy (QLF-I) (T0), early post-operative, (T1) and long term post-operative (T2). Two way repeated analysis of variance, independent samples t-test and correlations tests were used for statistical analysis of airway and skeletal changes. Results: Total PAS depth and area was significantly increased after the advancement and was stable in long term post-operative period for CLP and non-CLP patients. Nasopharyngeal and velopharyngeal airway space depth and area was statistically increased at T1 and T2 for both groups. Oropharyngeal airway depth and area showed no significant statistical difference at any of the time points. The effect of QLF-I osteotomy on (PAS) was similar in both CLP and non-CLP patients. Conclusions: Nasopharyngeal, velopharyngeal, and total pharyngeal airway space depth and area increased after maxillary advancement with the QLF-I osteotomy; this increase was stable in long term follow up. Maxillary advancement with the QLF-I technique had no significant effect on oropharyngeal airway space depth and area in both CLP and non-cleft patients. (C) 2021 Elsevier Masson SAS. All rights reserved.
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    Smile Attractiveness: Differences among the Perceptions of Dental Professionals and Laypersons
    (2017) Öz, Abdullah Alper; Akdeniz, Berat Serdar; Canlı, Erman; Çelik, Samet
    Objective: The aim of this study was to analyze the acceptable values of female and male smile attractiveness based on different amounts of gingival display and buccal corridor widths, as judged by dental professionals and laypersons. Methods: The frontal smile photographs of a male and female model were modified to create seven different smile photographs of the same individual with different amounts of gingival display and buccal corridor widths. Overall, 249 evaluators in four groups (Group 1=orthodontists, Group 2=prosthodontists, Group 3=oral surgeons, and Group 4=laypersons) evaluated 28 images of different smiles with a visual analogue scale. Significant statistical differences were found among the evaluator's scores (p<0.05).Results: For female smiles, the highest scores were obtained for 12% and 0% buccal corridor width. For male smiles, the highest scores were obtained for 4%, 0%, 12%, and 16% buccal corridor width for Groups 1, 2, 3, and 4 respectively. The highest scores were obtained for +2 mm and -3 mm of gingival display for female smiles. Conclusion: The amount of gingival display, the buccal corridor width, and the knowledge in the field affects the perceptions of smile attractiveness. Thus, 3 mm of gingival display and buccal corridor width larger than 16% should be avoided for esthetic reasons during dental treatment.