Sürdürülebilir Kalkınma Amaçları

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Alt birimler

• Ağız Diş ve Çene Hastalıkları Cerrahisi Anabilim Dalı
• Ağız, Diş ve Çene Radyolojisi Anabilim Dalı
• Diş Hastalıkları ve Tedavisi Anabilim Dalı
• Endodonti Anabilim Dalı
• Ortodonti Anabilim Dalı
• Pedodonti Anabilim Dalı
• Periodontoloji Anabilim Dalı
• Protetik Diş Tedavisi Anabilim Dalı

Araştırmacılar(35)

• Akar, Türker
• Akın, Muhammet
• Akın, Şeyma Eda
• Akyuz, Mehmet
• Akyüz, Emre
• Aslan, Derya
• Başyazıcı, Münevver Elif
• Bayır, Elif Ceren
• Bayrakçeken, Merve
• Bilge, Osman Murat
• Cingü, Hidayet
• Çelebi, Büşra
• Çetin, Damla Gür
• Destireci, Serkan
• Gömleksiz, Oğuzhan
• Gömleksiz, Seda
• Gülnahar, Evrem
• Gülnahar, Yakup
• İncekara, Mürşide Şüheda
• Kaçar, Derya
• Koçköprü, Zehra Merve
• Koseturk, Merve
• Ocak, Ali
• Okumuş, Ömer Faruk
• Pezik, Muhammed Emir
• Sağır, Zeynep Dilara
• Senocak, Tuba
• Şeker, Ayşe Sultan
• Şengül, Serap
• Taşkesen, Fatih
• Taşkesen, Hasan
• Tüfenk, Tuğçe
• Uzel, Melih Can
• Yeşil, Zeynep
• Yılmaz, Meryem

• ArticleAçık Erişim2026/r/ebyu/19215
  Color Matching Ability Among Single-Shade Resin Composites: Instrumental and Visual Evaluation

  Gömleksiz, Seda

  Background: This study aimed to evaluate the color-matching ability of 4 single-shade resin composites (RCs), using 2 different evaluation methods. Methods: One hundred and twelve specimens (8 × 2 mm) were fabricated in disc shape using 4 single-shade RCs (Omnichroma (OM), Essentia Universal (EU), Zenchroma (ZC), and Charisma Diamond One (CDO)) (n = 28). The specimens were randomly divided into 4 subgroups (na = 7), and cylindrical cavities (4 × 1 mm) were prepared in the center of each specimen. The cavities were then restored with either the same material or one of the other single-shade RCs. Color matching was measured instrumentally using a spectrophotometer and visually using a 0-4 scoring scale. Data were recorded and statistically analyzed (P < .05). Results: When instrumental analysis results were evaluated, ΔE00 values above the clinically acceptable threshold were observed in all groups except the control groups. The highest ΔE00 value was seen in the OM-EU group (P < .05); OM showed the worst color matching. The best color matching was observed in CDO. When visual analysis results were examined, the highest visual scores were seen in the EU-OM and ZC-OM groups (P < .05), whereas CDO presented the lowest visual scores. Conclusion: Color-matching ability of single-shade RCs varies depending on the material composition. Single-shade RCs with higher translucency after polymerization and enhanced optical design may provide better color matching. Some color differences detected instrumentally may not always be visually perceptible under clinical conditions.

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• ArticleAçık Erişim2026/r/ebyu/10846
  CBCT-based submandibular fossa depth classification and panoramic fractal dimension analysis in the posterior mandible

  Ocak, Ali; Akyüz, Mehmet

  Deep concavities of the submandibular fossa (SF) in the posterior mandible substantially increase the risk of lingual cortical plate perforation during implant placement. Although cone-beam computed tomography (CBCT) enables accurate three-dimensional assessment of SF morphology, panoramic radiography remains the most commonly used initial imaging modality. We investigated whether trabecular bone texture on panoramic radiographs, quantified using fractal dimension (FD), is associated with CBCT-measured SF depth. In this retrospective cross-sectional study, 133 patients with CBCT and panoramic radiographs obtained within 3 months were included. SF depth was classified as Type I (≤ 2 mm), Type II (2–3 mm), or Type III (> 3 mm). On the matching panoramic level, a 20 × 20-pixel cancellous region of interest was analyzed in ImageJ using box-counting FD. Group comparisons were performed using the Kruskal–Wallis and Mann–Whitney U tests with Bonferroni correction; correlations were assessed using Spearman’s rank correlation coefficient (p < 0.05). A total of 229 hemimandible measurements were evaluated. Mean age was 41.96 ± 15.59 years; 57.1% were female. Mean SF depth was 1.845 ± 0.750 mm and mean FD was 1.0964 ± 0.0667. Median FD was 1.0747, 1.1324, and 1.1340 in Types I, II, and III, respectively (Kruskal–Wallis p = 4.45 × 10⁻⁵). FD was significantly higher in Types II and III versus Type I (p = 0.000514 and p = 0.00633), with no difference between Types II and III (p = 1.00). SF depth positively correlated with FD (Spearman rho = 0.4138, p = 6.95 × 10⁻¹¹). Panoramic FD values reflected CBCT-defined SF depth categories, with deeper concavities showing consistently higher trabecular texture complexity. These results suggest that SF anatomical variation is a previously unrecognized source of regional FD heterogeneity in the posterior mandible and should be considered when interpreting panoramic FD in this region. FD is not proposed as a substitute for CBCT, but as a complementary quantitative descriptor with implications for both surgical risk awareness and radiographic research methodology.

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• ArticleAçık Erişim2026/r/ebyu/10653
  Biomechanical Behavior of Endodontically Treated Abutment Teeth with Periapical Lesions: A 3D Finite Element Analysis

  Klrmall, Ömer; Zeynalll, Ayten; Akar, Türker; Celik, Huseyin Kursat

  Objectives The stress distribution of teeth with periapical lesions, which are used as abutments in fixed prostheses, and its effect on the success of the restoration are not well known. This study investigates stress distribution in abutment teeth with periapical lesions and surrounding tissues under occlusal load using finite element analysis. Materials and Methods Three models were constructed: (1) a healthy mandibular premolar, (2) a premolar with a periapical lesion restored using a fiber post and single crown, and (3) a similar premolar used as an abutment for a three-unit bridge. A static load of 300 N was applied at a 45-degree angle to the tooth's long axis, targeting the lingual slope of the buccal cusp. Stress and deformation were analyzed across all structural components, including dental tissues and the surrounding trabecular bone. Results The results demonstrated that, in model 2, stress propagation extended more prominently along the root surface and progressed apically, resulting in a higher stress concentration in the periapical lesion region (0.061 MPa) when compared with model 3 (0.054 MPa). Furthermore, the greatest deformation was also observed in model 2. Across all models, peak stress was consistently localized in the cervicobuccal collar region of the tooth. Conclusion These findings underline the importance of prosthesis design in reducing the stress concentration in abutment teeth with periapical lesions and demonstrate the biomechanical advantage of splinted restorations over single crowns in cases with periapical lesions.

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• ArticleAçık Erişim2026/r/ebyu/10446
  Evaluation of trabecular architecture and bone density in periradicular bone of dilacerated mandibular third molars: a cone beam computed tomography study

  Ocak, Ali; Akyüz, Mehmet

  Background: This study aimed to evaluate and compare the periradicular trabecular bone density (BD) and microarchitecture of dilacerated and non-dilacerated mandibular third molars using gray values (GVs) and fractal dimension (FD) derived from cone-beam computed tomography (CBCT) images. Methods: This retrospective cross-sectional study included CBCT scans of 54 patients with dilacerated mandibular third molars and 60 controls without dilaceration. Root dilaceration was defined as deviation > 20° from the long axis. The dilaceration group was further divided into subgroups based on severity (angle of dilaceration > 60° vs. ≤60°). Standardized regions of interest were selected adjacent to the curvature of the roots, excluding cortical bones. GVs were automatically measured by Romexis 6.2.1 (R®software, Planmeca, Helsinki, Finland), and FD was calculated via ImageJ using the box-counting method. Appropriate statistical analyses were performed, with significance set at p < 0.05. Results: No significant differences were found between dilacerated and non-dilacerated groups in GV (437.12 ± 184.83 vs. 439.25 ± 148.90, p = 0.645) or FD (1.07 ± 0.15 vs. 1.04 ± 0.17, p = 0.204). However, when dilacerated teeth were stratified by severity, roots with > 60° curvature exhibited significantly higher FD values than those ≤ 60° (p = 0.040), whereas GV values did not differ between curvature groups (p > 0.05). Spearman’s correlation revealed no significant association between dilaceration angle and GV or FD (p > 0.05). Conclusion: Within the limitations of this study, fractal analysis was used as a quantitative method to assess periradicular trabecular bone changes adjacent to dilacerated root apices. Although overall GV- and FD-based metrics did not differ between dilacerated and non-dilacerated teeth, the higher FD observed in severely dilacerated roots (> 60°) suggests increased trabecular complexity in the apical region, reflecting a potential biological bone response associated with pronounced root curvature.

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• ArticleAçık Erişim2026/r/ebyu/10273
  Association of mandibular third molar positions, ramus height, and gonial angle on panoramic radiographs: a retrospective cross-sectional study

  Altındağ, Ali; Akyüz, Mehmet; Uzun, Sultan; Yüksel, İbrahim Burak; Mağat, Güldane

  Background: The aim of this study was to investigate the relationship between the positions of impacted mandibular third molars and the gonial angle and ramus height, as measured on panoramic radiographs, according to the Pell and Gregory/Winter classifications. Methods: This retrospective study included panoramic radiographs of 700 patients (350 males and 350 females) aged 18–62 years, who presented with bilaterally impacted mandibular third molars. The gonial angle and ramus height were measured, and the position of the impacted third molars was categorized based on the Pell and Gregory/Winter classification systems. Results: The most common third molar impaction position observed was vertical, followed by mesioangular and horizontal positions. The study found that a high gonial angle was more frequently observed in males, while a low gonial angle was more common in females. No significant association was identified between the type of mandibular third molar impaction and the gonial angle or ramus height. Additionally, individuals with high gonial angles had lower ramus heights. Individuals with impacted teeth in the “other” position had statistically higher gonial angles (p < 0.05). Conclusion: The study concludes that there is no significant correlation between the gonial angle, ramus height, and the type of mandibular third molar impaction. However, individuals with impacted teeth in the “other” position were found to have higher gonial angles, which may increase the risk of mandibular fractures. These findings show that although certain impaction types are more prevalent, mandibular anatomical parameters such as gonial angle and ramus height do not appear to significantly influence impaction patterns when assessed on panoramic radiographs.

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• ArticleAçık Erişim2026/r/ebyu/10150
  Gingival inflammation and plaque accumulation affect therapeutic outcomes in patients with acne vulgaris

  Okumuş, Ömer Faruk; Yazıcı, Mustafa; Kantarci, Alpdoğan

  Background: We hypothesized that acne vulgaris (AV) and gingivitis were associated through systemic inflammatory mechanisms, sharing common etiological factors. This study aimed to identify the association between AV and gingivitis and to assess changes in acne severity in relation to changes in the plaque index (PI). Methods: This prospective, observational study included 150 patients aged 13 to 19 years, divided into three equal groups based on acne severity. The PI and the gingival index (GI) of all participants were recorded, followed by oral hygiene instruction and scaling. The severe acne group was re-evaluated after 1.5 months, constituting the follow-up stage of the study. These patients were then divided into two subgroups based on the degree of change in their acne scores. Changes in PI and GI were calculated from repeated measurements. Results: At baseline, although no significant difference was observed between the groups in terms of PI scores (p > 0.05), the GI scores were significantly higher in the severe acne group compared with the mild acne group (p < 0.001). At the re-evaluation, the subgroup with more pronounced improvement in acne scores showed significantly greater changes in both GI and PI values (p < 0.001), and the magnitude of these changes demonstrated good discriminative performance for acne improvement (AUCs = 0.896–0.903; p < 0.001). Conclusions: The findings suggested that gingival inflammation was associated with the severity of AV lesions, independent of plaque accumulation. Thus, improvements in gingival inflammation and plaque accumulation were associated with AV-associated symptom improvement. Trial registration: This study was registered in ClinicalTrials.gov under the number NCT06237387 on May 24, 2024. Plain language summary: Acne vulgaris and gingivitis are common inflammatory diseases. Etiological factors such as nutrition, hormonal changes associated with puberty, and hygiene habits are effective in both diseases. This study aimed to examine the relationships among plaque accumulation, gingivitis, and acne vulgaris. A total of 150 adolescents were included in the study, and participants were divided into three groups based on acne severity: mild, moderate, and severe. All participants were assessed for plaque and gingival inflammation, and all received oral hygiene instruction and dental scaling. Greater reductions in plaque levels and gingival inflammation were observed in patients who showed more pronounced regression of acne lesions.

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• ArticleAçık Erişim2026/r/ebyu/10067
  Radiographic root pulp visibility of the mandibular left second molar as an indicator of legal adulthood (≥ 18 Years): a panoramic study

  Akyuz, Mehmet; Magat, Guldane

  This study aimed to evaluate the diagnostic performance of mandibular left second molar root pulp visibility (RPV) for legal age classification (≥ 18 years) using panoramic radiographs. A total of 983 orthopantomograms (492 males, 491 females) were retrospectively analyzed. Root pulp visibility was classified according to the staging system described by Olze et al. Diagnostic performance measures, logistic regression analysis, and receiver operating characteristic (ROC) analysis were performed. A p-value < 0.05 was considered statistically significant. A statistically significant association was observed between pulp stage and legal age classification (p < 0.001). Logistic regression analysis demonstrated a stage-dependent increase in the odds of being classified as ≥ 18 years, with Stage 2 and Stage 3 showing strong predictive effects (OR = 6.04 and OR = 19.13, respectively). Diagnostic performance analysis indicated that Stage ≥ 2 demonstrated high specificity (0.94). ROC analysis revealed moderate discriminatory performance (AUC = 0.676; 95% CI: 0.647–0.705). Mandibular second molar root pulp visibility may serve as a useful radiographic marker for legal age threshold assessment, particularly at higher pulp stages.

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• ArticleAçık Erişim2026/r/ebyu/10027
  Are Smartphones Associated With Stress and Poor Sleep Quality? The Perspective of Dental Students

  Şanlıdağ, Ahmet; Aydın, Tuğba; Uzel, Melih Can; Navruz, Çiğdem Yıldırım

  Objective: This study aimed to examine the association between problematic smartphone use, sleep quality and psychosocial factors among dental students, and to identify key behavioural and psychological predictors of high-risk smartphone use within this academically demanding population. Materials and Methods: A cross-sectional survey was conducted during the 2024–2025 academic year at Faculty of Dentistry, Atatürk University including 485 students from all academic years (mean age = 22.31 ± 1.77; 63.1% female). Participants were classified into low- and high-risk groups based on gender-specific Smartphone Addiction Scale–Short Version (SAS-SV) cut-offs (≥ 31 for males; ≥ 33 for females). Sleep quality was assessed using the Pittsburgh Sleep Quality Index (PSQI). For the separate analysis of sleep disturbance, the raw sum of PSQI items 5b–5j was used, with a theoretical range of 0–27, rather than the conventional 0–3 PSQI sleep disturbance component score. Psychosocial status was evaluated using the Depression Anxiety Stress Scales-21 (DASS-21). Group comparisons were performed using appropriate parametric or non-parametric tests, and predictors of high-risk smartphone use were identified through binary logistic regression analysis. Results: Overall, 54.5% of participants were classified as high-risk users (mean SAS-SV = 33.26 ± 10.57). Demographic variables such as age, sex and class year were not associated with risk classification (all p > 0.90). Sleep onset latency was significantly shorter in the high-risk group (19.90 ± 17.53 min) compared to the low-risk group (24.50 ± 18.36 min; p = 0.005), while total sleep duration showed no difference (p = 0.531). Among PSQI subcomponents, only sleep disturbance was significantly associated with high-risk smartphone use (OR = 1.05, 95% CI: 1.01–1.09, p = 0.029). Categorical analyses further showed that poor subjective sleep quality, sleep disturbance, daytime dysfunction and elevated stress, anxiety and depression were significantly more frequent among high-risk users, whereas sleep medication use did not differ between groups. In the psychosocial model, stress scores predicted high-risk smartphone use (OR = 1.09, 95% CI: 1.02–1.17, p = 0.015), whereas anxiety and depression scores were non-significant (p ≥ 0.62). Conclusion: While sleep disturbance and stress predicted high-risk PSU in domain-specific models, sleep disturbance lost significance in the fully adjusted combined model, where daytime dysfunction emerged as the primary sleep-related predictor and stress remained only marginally significant (p = 0.049). These findings should therefore be interpreted with caution.

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• ArticleAçık Erişim2026/r/ebyu/10025
  Finite Element Analysis of Dentoalveolar Stress in Combat Sports Using Hybrid and Conventional Mouthguards

  Kalafat, Çağla Nur; Yeşil, Zeynep

  Aim: This study aimed to contribute to the development of modern mouthguards by evaluating the stresses generated by hook and uppercut punches applied during combat sports on dentoalveolar structures and mouthguards, the protective effectiveness of different mouthguard designs, and the resulting deformations using three-dimensional finite element analysis. Materials and Methods: Three-dimensional solid models of the maxilla, mandible, teeth, alveolar bone, and mouthguards were constructed using an anatomical head model with Class I occlusion and complete permanent dentition. A conventional mouthguard with a uniform thickness of 4 mm made of ethylene vinyl acetate and a hybrid mouthguard consisting of a 3 mm polycarbonate occlusal surface with EVA axial walls were modeled. Hook and uppercut punch loads were simulated at an impact velocity of 12 m/s with an effective mass parameter of 5 kg. Von Mises equivalent stresses and displacement values occurring in the jaws, teeth, alveolar structures, and mouthguards were analyzed using three-dimensional finite element analysis. Results: During hook and uppercut punch application, the highest von Mises stress values in the mandible were observed in the model without a mouthguard (200 and 520 MPa, respectively), while the lowest values were detected in the model with a hybrid mouthguard (170 and 260 MPa). Similarly, mandibular teeth exhibited the highest stress values in the model without a mouthguard (1100 and 1600 MPa) and the lowest values in the hybrid mouthguard model (300 and 500 MPa). Stress transmission to the maxilla and maxillary teeth was minimal in all models. For both punch types, the hybrid mouthguard demonstrated higher stress values than the conventional mouthguard. In models using mouthguards, maximum displacement occurred later after impact, and deformation was distributed over a wider surface area rather than being localized. Conclusion: Hybrid mouthguards demonstrated superior biomechanical performance compared with conventional mouthguards by reducing stress transmission to dentoalveolar structures. The combination of a rigid occlusal component and flexible axial walls enabled more effective energy distribution, particularly under high-energy vertical loading. These findings suggest that hybrid mouthguards represent an effective option for preventing dentoalveolar trauma in combat sports.

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• ArticleAçık Erişim2025/r/ebyu/19571
  Machine Learning-Based Tooth Color Assessment Using Color Moments to Prevent Metamerism in Different Clinical Lights

  Ozdogan, Alper; Simsek, Emrah; Karcioglu, Abdullah Ammar; Şenocak, Tuba24; Efitli, Esra; Karataş, Furkan

  Choosing the right shade in prosthodontic treatment is of great importance in terms of achieving a natural aesthetic appearance and increasing the patient's satisfaction with the treatment. However, this process is affected by many technical and environmental factors. In particular, variable light sources in clinical and laboratory environments cause the problem of metamerism, which leads to misleading results in color perception. This study proposes a method that reduces the effect of metamerism by detecting color under different light conditions, eliminates the subjectivity of traditional color matching methods and offers an alternative to costly measurement devices. The 29 color samples from the Vita 3D Master shade guide were imaged five times each in four different clinical light conditions. Feature extraction was performed using color moments in RGB, LAB and HSV color spaces. Experimental studies were carried out with different machine learning algorithms on the datasets created with these data. As a result, 100% accuracy was obtained for the classification of four clinical light conditions, 85% for the light-independent classification of 29 Vita colors, 100% under white light, 97% under natural light, 92% under flash light and 94% under yellow light. These findings demonstrated that the limitations of traditional or costly color selection processes can be overcome and metamerism can be reduced by machine learning techniques.

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