Celal Genç

Arda Arısan, Celal Genç, Gökhan Serhat Duran. Korean J Orthod 2026;56:207-20. https://doi.org/10.4041/kjod25.320

Aim: Cleft lip and palate (CLP) are among the most prevalent congenital anomalies, necessitating long-term, multidisciplinary care. In recent years, patients and their families have increasingly turned to online platforms, such as YouTube, for health-related information. This study aimed to assess the quality and reliability of information in Turkish-language YouTube videos concerning CLP. Methodology: A cross-sectional analysis of YouTube videos was conducted in August 2025. The platform was searched using the keywords "cleft lip" and "cleft palate," and the first 110 relevant videos were included for analysis. Videos were evaluated using a comprehensive scoring system based on ten criteria, including etiology, surgical and orthodontic treatment, feeding, and prognosis. Videos were also categorized by their source: individual health professionals, corporate health professionals, health websites, and independent users. Descriptive statistics and the Kruskal-Wallis test were used to analyze data. Results: Of the 109 videos analyzed, the mean total information score was 5.3 ± 4.5 (out of a possible 24). The majority of videos (66.1%) were of poor quality (score 0-5). The most frequently covered topics were surgical treatment (66.1%) and prognosis (66.1%), while prenatal diagnosis (15.6%) and Nasoalveolar molding (NAM) (15.6%) were the least covered. Although videos from corporate health professionals had the highest mean score (8.0 ± 6.1), there was no statistically significant difference in the information quality across the different source categories (p = 0.086). Conclusion: While YouTube contains a vast amount of information regarding cleft lip and palate, the overall quality is poor and highly variable. Healthcare professionals should be aware of the information their patients may be accessing and should consider taking an active role in creating and directing patients to high-quality, reliable online content.

Background: Multimodal large language models (LLMs) are increasingly being explored as clinical support tools, yet their capacity for orthodontic biomechanical reasoning has not been systematically evaluated. This retrospective study assessed their ability to analyze treatment mechanics and explored their potential role in supporting orthodontic decision-making. Methods: Five publicly available models (GPT-o3, Claude 3.7 Sonnet, Gemini 2.5 Pro, GPT-4.0, and Grok) analyzed 56 standardized intraoral photographs illustrating a diverse range of active orthodontic force systems commonly encountered in clinical practice. Three experienced orthodontists independently scored the outputs across four domains—observation, interpretation, biomechanics, and confidence—using a 5-point scale. Inter-rater agreement and consistency were assessed, and statistical comparisons were made between models. Results: GPT-o3 achieved the highest composite score (3.34/5.00; 66.8%), significantly outperforming all other models. The performance ranking was followed by Claude (57.8%), Gemini (52.6%), GPT-4.0 (48.8%), and Grok (38.8%). Inter-rater reliability among the expert evaluators was excellent, with ICC values ranging from 0.786 (Confidence Evaluation) to 0.802 (Observation). Model self-reported confidence showed poor calibration against expert-rated output quality. Conclusions: Multimodal LLMs show emerging potential for assisting orthodontic biomechanical assessment. With expert-guided validation, these models may contribute meaningfully to clinical decision support across diverse biomechanical scenarios encountered in routine orthodontic care.

Objective The present study aims to compare β-thalassemia major patients and healthy individuals in terms of anthropometric characteristics and changes in craniofacial profile. Subjects and method Craniofacial anthropometric measurements were performed on a total of 422 subjects (199 β-thalassemia major patients and 223 healthy individuals) by using a millimetric caliper and tape measure on 19 anthropometric parameters (8 horizontal, 10 vertical, and 1 head circumference) in cranial, facial, nasal, orolabial, and orbital zones. Results The difference between the orbital, nasal, and orolabial zone parameters of healthy subjects and β-thalassemia major patients was found to be statistically significant (p < 0.05). There was no statistically significant difference between the groups in terms of head circumference in the cranial zone and total facial height in facial zone (n-gn) values (p˃0.05). In intragroup comparison between females and males with β-thalassemia, statistically significant differences were found in forehead width (ft-ft), forehead height (tr-gl), right eye width (R ex-ex), and upper lip height (sn-stm) (p < 0.05). Conclusion Understanding the craniofacial profile changes in β-thalassemia major patients and increasing our knowledge about the relationship between the course and severity of disease and the level of these changes would contribute to the advancements in diagnoses to be made in facial and jaw zones of these patients and in the treatment plans. Clinical relevance We believe that the analysis and results of the craniofacial anthropometric data obtained in the study will contribute to the diagnosis and treatment processes of patients with β-thalassemia major in areas of expertise such as craniofacial surgery, orthodontics, and hemato-oncology.

Amaç Dünya çapındaki tüm üniversitelerde eğitim süreci SARSCoV-2 (COVID-19) salgınından güçlü bir şekilde etkilenmiştir. Virüsün yayılımını önleme tedbirleri doğrultusunda Çanakkale Onsekiz Mart Üniversitesi, Diş Hekimliği Fakültesi’nde de devam etmekte olan dersler yüz yüze eğitimden 2020 bahar döneminde acilen çevrimiçi ortamda sağlanan uzaktan eğitim metoduna aktarılmıştır. Bu çalışmanın amacı, öğrencilerin acil uzaktan eğitim metodu hakkındaki memnuniyetlerini değerlendirmektir. Gereç ve Yöntemler Uzaktan eğitim metodu uygulandıktan 2 dönem sonra Ocak 2021 tarihinde 1., 2. ve 3. sınıftaki öğrencilerden kullanılan materyaller ve iletişim araçlarını, öğretmen-öğrenci etkileşimini, ortam tasarımını, e-derse yönelik tutumlarını, dersin içeriği ve öğretim sürecini inceleyen çevrimiçi bir anket doldurmaları istendi. Veriler, tanımlayıcı istatistikler ile değerlendirildi. Sınıflar ve cinsiyetler arası karşılaştırmalar için Ki-kare ve Fisher Exact testleri kullanıldı. İstatistiksel anlamlılık sınırı 0,05 olarak belirlendi. Bulgular Ankete toplamda 189 öğrenci (116 kadın, 73 erkek öğrenci) katıldı. Ankete katılan tüm öğrencilerin % 45.9’unun uzaktan eğitimden memnun olmadıkları, % 65.07’sinin ise uzaktan eğitimdeki öğrenme motivasyonlarının geleneksel eğitime göre daha az olduğu gözlemlendi. Birinci sınıftaki öğrencilerin, öğretmen-öğrenci etkileşiminin 2. ve 3. sınıflara oranla daha düşük olduğu görüldü (p<0,05). Sonuç Ağırlıklı olarak teorik eğitimi ve klinik öncesi uygulama eğitimini uzaktan öğrenme ile alan öğrenciler üzerinde yürütülen çalışmanın verileri ışığında uzaktan eğitim metotlarının geliştirilmesi gerektiği düşünülmektedir.

To study the reliability of the Tanaka-Johnston mixed-dentition analysis in Turkish individuals and develop a new population-adjusted regression equation for predicting the size of unerupted canines and premolars. The new regression equations were tested to establish their validity in Turkish children. The mesiodistal dimensions of teeth on study casts of 12- to 14-year-old Turkish children were measured. The actual tooth measurements were then compared with predicted values using the Tanaka-Johnston equation. Subsequently, the new regression equations were tested in a group of 50 individuals to determine their validity. The Tanaka-Johnston regression equations overestimated the actual mesiodistal widths of permanent canines and premolars. With the new regression equations, no statistically significant differences were observed between actual and predicted widths. The Tanaka-Johnston prediction method is not accurate when applied to a Turkish population. The new equations are reliable for predicting the width of unerupted canines and premolars in Turkish individuals.