Kübra Gülnur Topsakal

This study evaluated the resistance under load of a novel monolithic prosthetic design integrating functional orthodontic components within a digitally fabricated framework. Sixty-six specimens were allocated into three groups: (1) a Design Group consisting of one-piece 3D-printed customized metal copings with integrated brackets or tubes; (2) a Porcelain Crown Group with conventionally bonded orthodontic attachments; and (3) a Natural Teeth Group with brackets and tubes bonded to extracted human teeth. Each group included premolar (bracket) and molar (tube) subgroups (n = 11). All specimens were subjected to shear loading using a universal testing machine. Higher resistance values were observed in the monolithic group (92.56 ± 63.88 MPa) (p < 0.001); however, these values represent structural resistance rather than shear bond strength. Despite the wide variability, all measured values remained above the clinically accepted threshold. No statistically significant differences were observed between porcelain crowns and natural teeth in premolar or molar subgroups. The findings indicate that eliminating the adhesive interface enhances structural integrity under shear forces. This monolithic orthodontic–prosthetic approach may provide a clinically relevant alternative in cases where conventional bonding is not feasible and supports a fully digital, patient-specific workflow through scanner library integration.

Objectives: This study aimed to compare the accuracy of automated and manual digital Bolton analyses performed using two different clear aligner therapy (CAT) planning software. Materials and Methods: Digital intraoral scans of 40 patients undergoing CAT were analyzed. Mesiodistal tooth widths and Bolton ratios were measured using: (1) a manual digital method via OrthoViewer software, (2) the ClinCheck system, and (3) DentOne software employing AI-based segmentation. The anterior and total Bolton values, as well as individual tooth width measurements, were statistically compared among the three methods. The Kruskal-Wallis test was performed to compare the differences. The Mann-Whitney U test was used for the post-hoc comparison between the groups. Measurement reliability was assessed using intra- and inter-observer intraclass correlation coefficients (ICC). Results: No significant differences were observed in anterior Bolton ratios across groups (p>0.05), whereas total Bolton values showed significant differences between software and manual measurements (p<0.05). ClinCheck demonstrated smaller deviations from manual measurements compared to DentOne, particularly for maxillary molars and incisors. The largest discrepancies were observed in the posterior region. For teeth 26 and 16, the average deviations from the manual digital method were 0.56 mm and 0.47 mm for ClinCheck, and 0.84 mm and 0.87 mm for DentOne, respectively. Conclusions: While the automated Bolton analyses performed by ClinCheck and DentOne are clinically acceptable, statistically significant differences exist when compared to manual digital methods. These discrepancies are more pronounced in posterior teeth, likely due to anatomical complexity and limitations in intraoral scanning. Thus, clinicians should perform meticulous intraoral scans and consider manual verification when interpreting automated Bolton results, particularly for molars and crowded segments.

The study aims to investigate the post-processing effects of Aloe vera gel (AV) on biofilm formation and the physical properties of 3D-printed dental resins. Samples manufactured using Biomed Clear Resin were assigned to an Aloe vera-treated group (Group AV) and a control group (Group C), with a total of 128 disk-shaped specimens (n = 64 per group). Group AV underwent post-polymerization in 100% Aloe vera gel, while Group C was directly polymerized. For color stability evaluation, specimens were immersed in staining solutions and incubated at 37 °C for 30 days. Surface morphology (SEM/EDX), water sorption (WSP), and water solubility (WSL) were evaluated. Biofilm formation was assessed using Streptococcus mutans. Intergroup differences were analyzed using the Kruskal–Wallis test, followed by Mann–Whitney U tests for post hoc comparisons (p < .05). Group AV was demonstrated to mitigate color alteration, particularly in coffee and red wine solutions, and SEM analysis revealed a microtextured surface structure. Aloe vera post-processing reduced water solubility, while no significant effects were observed on water sorption or biofilm formation. The results indicate that AV treatment improved the physicochemical stability of 3D-printed dental resins, although no significant antibacterial effect was observed. Aloe vera post-processing may represent a promising natural approach to enhance the longevity and aesthetic performance of 3D-printed dental appliances; however, further clinical validation is required.

Background: The purpose of this study was to compare the angle of the maxillary central incisors in Class I and Class III malocclusions, with cephalometric radiography Methods: This study analyzed 120 lateral cephalometric radiographs classified into study and control groups based on Angle’s classification, ANB angles, and Wits appraisal. The study group with skeletal Class III malocclusion, while the control group included individuals with skeletal Class I malocclusion The study group comprised 33 female and 27 male patients with a mean age of 13,59± 3,53, while the control group included 32 female and 28 male patients with a mean age of 14,26±2,60. The collum angle was defined as the angle between the long axes of the root and crown. Various cephalometric parameters were assessed, and descriptive statistics were calculated. Results: The study group exhibited significantly greater proclination of the maxillary incisors than the control group, as evidenced by higher 1/NA° and 1-NA (mm) values (p < 0.001). The mean collum angle was significantly higher in Class III individuals (4.05° ± 3.98) than in Class I individuals (−0.44° ± 5.24) (p<0.001), indicating a more pronounced labial root positioning. These morphological features are consistent with true skeletal Class III malocclusion. Conclusion: The increased collum angle observed in Class III individuals results in a more labial root position, which may heighten the risk of dehiscence and fenestration during orthodontic treatment. Therefore, clinicians should consider this factor when planning treatment strategies.

Objective: This study aimed to evaluate the accuracy of different mixed dentition period analysis methods in individuals with cleft lip and palate (CLP). Design: Retrospective comparative study. Setting: Department of Orthodontics, Erciyes University, Turkiye. Patients/Participants: A total of 70 individuals aged 13 to 16 years were included in the study: 35 with CLP and 35 noncleft controls. In all individuals included in the study, all permanent teeth had erupted except for the maxillary lateral incisors, which are frequently missing in individuals with CLP. Interventions: For formulas suggested by 8 different prediction methods (Tanaka-Johnston, Moyers 50%, Moyers 75%, Boboc, Cattaneo, Camilo, Barnabe, and Melgaço), the MD and buccolingual dimensions of incisors and molars, as well as the mesiodistal dimensions of erupted canines and premolars, were measured on the 3-dimensional dental models. Main Outcome Measures: Comparison of mean difference between actual and predicted permanent canine and premolar widths, using the control sample as a benchmark to judge model suitability in the CLP population. Results: All regression methods showed significant differences between predicted and actual values in the CLP group ( P < .05). Boboc and Cattaneo had the fewest errors, while Tanaka-Johnston and Barnabé showed the most significant overestimation. In controls, Cattaneo was most accurate in the maxilla and Tanaka-Johnston in the mandible. Conclusions: The Boboc and Cattaneo methods provided the most accurate predictions of permanent canine and premolar widths in patients with CLP, while the Tanaka-Johnston and Barnabé methods consistently overestimated values.

Bu bölümde ortodontik tedavide kullanılan temel aygıt sistemleri, tarihsel gelişim süreci ve güncel klinik uygulamalarıyla birlikte kapsamlı şekilde ele alınmıştır. Sabit ortodontik aygıtlar, Edward H. Angle’ın Edgewise sistemiyle başlamış; Lawrence F. Andrews’ın Straight-Wire tekniği ile biyomekanik kontrol ve tedavi verimliliği artmıştır. Metal, seramik ve kendinden kilitli braket türleri avantaj ve sınırlılıklarıyla birlikte karşılaştırmalı olarak sunulmuştur. Hareketli ortodontik aygıtlar ise büyüme gelişim döneminde bireysel diş hareketlerinin kontrolü, alışkanlık kırma ve ark genişletme gibi amaçlarla uygulanmaktadır. Bu apareylerin yapısal elemanları, endikasyonları ve sınırlılıkları detaylandırılmış; örnek görsellerle desteklenmiştir. Fonksiyonel apareyler ve myofonksiyonel terapiler, çene büyümesinin yönlendirilmesi ve oral kas fonksiyonlarının düzenlenmesi açısından ele alınmış; hareketli ve sabit fonksiyonel aygıt türleri sınıflandırılmıştır. Ayrıca, oral alışkanlıkların değerlendirilmesi, tanı kriterleri ve terapötik egzersiz protokolleri şematik olarak sunulmuştur. Son olarak, geçici ankraj cihazları hem sabit tedavilere destek olarak hem de kompleks diş hareketlerinin etkin kontrolünde kullanılmış; başarıyı etkileyen faktörler ve olası komplikasyonlar açıklanmıştır. Bölüm, öğrenci ve klinisyenlere yönelik öğretici nitelikte, literatür destekli ve görsel açıdan zengin bir içerik sunmaktadır.