Sürdürülebilir Kalkınma Amaçları
Yazarlar
Yayınlar
- MakaleYalnız künye2026Impact of ROI size on fractal dimension values in radiographs using a novel ROI selection method
Yavuz, Esra; Tunc, Selmi
Objective: This study aimed to evaluate the effect of various sizes of regions of interest (ROIs) on fractal dimension (FD) in the evaluation of trabecular bone structure in dental radiographic images. Materials and methods: This study included 12 sheep hemimandibles. One set of digital images was obtained from each hemimandible using either periapical radiography, panoramic radiography, or cone-beam computed tomography (CBCT). Fractal analysis (FA) was conducted using ImageJ 1.3 software with the box-counting method on small, medium, and large ROIs obtained from each image, using a novel ROI selection method. Comparisons of FD values obtained from the three different ROI sizes were conducted within each radiographic image using repeated-measures ANOVA. Post hoc pairwise comparisons were performed with Bonferroni correction. Data were analyzed using Jamovi 1.6.23. Statistical significance was accepted as p < 0.05. Results: In periapical radiography, the FD values obtained in small, medium, and large ROI sizes were 1.60 ± 0.02, 1.60 ± 0.01, and 1.65 ± 0.01, respectively (p < 0.001). In panoramic radiography, they were 1.45 ± 0.04, 1.71 ± 0.02, and 1.59 ± 0.01, respectively (p < 0.001), and in CBCT, they were 0.76 ± 0.07, 1.21 ± 0.04, and 1.48 ± 0.04, respectively (p < 0.001). Conclusions: The study demonstrates that FD is affected by the ROI size.
- MakaleAçık Erişim2023Access Cavity Preparation and Localization of Root Canals Using Guides in 3D-Printed Teeth with Calcified Root Canals: An In Vitro CBCT Study
Kamburoğlu, Kıvanç; Sönmez, Gül; Koç, Cemre; Yılmaz, Funda; Tunç, Osman; Isayev, Abulfaz
Pulp canal obliteration (PCO) is a significant complication in endodontics that can occur due to various factors. Cone beam computed tomography (CBCT) is a useful diagnostic tool for identifying root canal anatomy and variations, and guided endodontics is emerging as an alternative treatment solution for teeth with partially or entirely obliterated pulpal canals. However, the accuracy of CBCT-guided 3D-printed guides on different materials and layer thicknesses is not well understood. Therefore, this study aimed to evaluate the accuracy of guides prepared using CBCT images on 3D-printed teeth with stereolithography (SLA) using three different materials and two different layer thicknesses. This study found that 3D-printed guides were accurate and reliable for accessing 3D-manufactured obliterated teeth and reaching the apical area. No significant differences in distance or angle measurements were found when different guide materials were used, suggesting that materials can be selected based on availability and cost. These findings contribute to the knowledge base regarding the effectiveness of 3D printing technology in guided endodontics and can help to identify the most suitable materials and techniques for this application.