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Öğe Cone beam computed tomography vs. microcomputed tomography for trabecular bone healing assessment(Springer, 2025) Deniz, Yeşim; Çetin Genç, Çiğdem; Orhan, KaanPurpose This study aimed to compare cone beam computed tomography (CBCT) and microcomputed tomography (μCT) data to evaluate the micromorphological structure of healing bone in defects created on rabbit mandibles at different stages. Methods Residual rabbit mandibular alveolar bone tissues from another animal study involving 18 rabbits were utilized. In the prior study, 10 × 4 mm bone cavities were created, left to heal naturally, and the animals were sacrificed after 21, 45, and 90 days. In this study, CBCT and μCT imaging were performed on the excised defect regions. The micromorphometry parameters including bone–volume fraction (BV/TV), bone–surface density (BS/TV), fractal dimension, connectivity density (Conn. Dn.), trabecular thickness (Tb.Th), and trabecular separation (Tb.Sp) were examined by ImageJ (US National Institutes of Health, Bethesda, MD, USA). Paired two-sample t‑tests, Wilcoxon test, and Bland–Altman plots were performed. Result Differences in the parameters Conn. Dn., fractal dimension, Tb.Th, and Tb.Sp were observed between CBCT and μCT on day 21. By day 45, no significant differences were noted in BV/TV, BS/TS, Tb.Th, and Tb.Sp. On day 90, all measured parameters showed no statistically significant differences between CBCT and μCT. Bland–Altman analysis showed an agreement for most parameters (BV/TV, BS/TV, fractal dimension, Tb.Th, and Tb.Sp) after 21, 45, and 90 days, with minimal biases emerging over time, while a more notable divergence in Conn. Dn. was observed. Conclusion CBCT can be used for micromorphological analyses on days 45 and 90 of bone healing as there were no differences between CBCT and μCT during these periods.Öğe Evaluation of oral health and dental hygiene habits in adolescents with intellectual and developmental disabilities: a longitudinal pilot study(Quintessence Publishing Co Inc, 2025) Sessiz, Rüya; Ayan, Gizem; Sezer, Berkant; Tosun, İlgiObjectives: Adolescents with intellectual and developmental disabilities are at increased risk of oral diseases due to physical limitations, poor oral health awareness, and inadequate dental hygiene practices. The aim of this study was to evaluate the oral health status of adolescents with intellectual and developmental disabilities and to analyze changes in their dental hygiene habits following subsequent visits and oral hygiene education. Method and materials: This pilot longitudinal observational study involved students with mild to moderate intellectual and developmental disabilities from a special needs school. Oral health was assessed using the decayed, missing, and filled teeth (DMFT) index, International Caries Detection and Assessment System (ICDAS-II), Basic Erosive Wear Examination (BEWE), Developmental Defects of Enamel (DDE), and Simplified Oral Hygiene (OHI-S) indices. Participants received oral hygiene training, and their brushing techniques were evaluated using the Oral Hygiene Skills Survey. Data on brushing frequency, skills, toothpaste use, and OHI-S scores were collected at baseline and at 1-, 3-, and 6-month follow-ups. Results: Twenty-three participants aged 14 to 19 years were evaluated, showing high DMFT scores (mean 10.91 ± 6.06), advanced caries in 78.3%, and enamel defects and erosive tooth wear in 65.2%. Significant improvements were observed in toothbrushing frequency (P = .008), with reductions in OHI-S scores (P = .001) and enhanced brushing skills (P = .016) during follow-ups. Conclusion: The findings indicate a high prevalence of dental caries, enamel defects, and erosive tooth wear among adolescents with intellectual and developmental disabilities. Despite poor baseline oral hygiene practices, regular follow-ups and oral hygiene education significantly improved oral hygiene habits and outcomes.Öğe Unveiling Bone and Dental Regeneration Potential of Quince Seed Mucilage-Nanohydroxyapatite Scaffolds in Rabbit Mandibles(Wiley, 2025) Çetin Genç, Çiğdem; Yılmaz-Dağdeviren, Hilal Deniz; Deniz, Yeşim; Derkuş, Burak; Değirmenci, Alpin; Arslan, Yavuz EmreDonor-side morbidity of autografting for maxillofacial region defect regeneration has directed attention to bioengineered scaffolds. Composite scaffolds that mimic the bone extracellular matrix (ECM) are the potential candidates for defect reconstruction. Herein, a plant-based regenerative hydrogel, quince seed mucilage (QSM), was enriched with the nanohydroxyapatite (nHAp) particles to construct composite scaffolds (QSM/nHAp). The emerging scaffold is able to induce cellular spheroid formation and regenerate the critical-sized bilateral mandibular defects in rabbits. The macroscopic observations, histochemical (HC) and immunohistochemical (IHC) stainings, mu-computer tomography (CT) scanning, quantitative real time-polymerase chain reaction (qRT-PCR) analyses, and scanning electron microscopy (SEM) imaging revealed that all QSM/nHAp scaffolds were swelled with host blood, filled the whole cavity, and sustained cellular infiltration without adverse reactions. The gradual biodegradation profile of the scaffolds improved bone regeneration by releasing nHAp particles from the scaffold. Strikingly, co-development of dental and bone regeneration was observed for all QSM/nHAp groups beginning after day 21. Moreover, QSM/nHAp scaffolds induced expression (> 2-fold) of bone and dental-related gene and protein expressions at the grafted area and sustained a proper platform for maxillofacial remodeling. Therefore, we strongly believe that such biocompatible plant-based constructs, compared with conventional medical devices used in maxillofacial surgery, could support and induce simultaneous bone and dental regeneration due to the intrinsic dynamics of the material.Öğe Comparison of pediatric doses of cone beam computed tomography and panoramic radiography in three age groups(Novin Medical Radiation Institute, 2025) Eren, Hakan; Deniz, Yeşim; Ata, G.C.; Sessiz, RüyaBackground: A wide variety of radiation dose values can occur in Cone Beam Computed Tomography (CBCT) devices with different field of view (FOV) sizes. Radiation dose of current CBCT devices have been considerably reduced. This study compared effective radiation doses and organ absorption doses obtained from panoramic and CBCT imaging at various FOV sizes in children aged five, ten, and fifteen years. Materials and Methods: To calculate the organ doses and effective doses, a dose calculation software PC-based Monte Carlo (PCXMC) 2.0 based on Monte-Carlo simulation was used for CBCT and panoramic exposures. Both absorbed and effective doses were calculated for the simulated phantoms of 5, 10 and 15 years old separately. Results: The organ doses of thyroid and salivary glands measured with 6*6 ECO Scan CBCT were found to be lower when compared with panoramic radiography organ doses. Panoramic radiography effective doses were lower than all other CBCT modes in all age groups. Conclusion: Although it is stated that this study does not have diagnostic data, it is thought that 6×6 ECO Scan Mode of Newtom CBCT can be chosen instead of panoramic radiography in children aged 5 years due to the dose differences. © 2025 Novin Medical Radiation Institute. All rights reserved.Öğe Is panoramic radiography sufficient enough for the evaluation of mandibular condyle osseous changes and cortication types?(Termedia Publishing House Ltd., 2025) Sessiz, Rüya; Köse, EmreIntroduction: Temporomandibular disorders (TMDs) are identified by cranio-facial pain that affects the temporomandibular joint or masticatory muscles, along with symptoms, such as limited mouth opening, clicking, and crepitus. Objectives: The aim of this study was to investigate the accuracy of panoramic radiography (PR) in detecting mandibular condyle osseous changes and mandibular condyle-articular eminence cortication types in patients with TMDs, using cone beam computed tomography (CBCT) as a gold standard. Material and methods: Osseous changes in the mandibular condyle head and cortication types in both articular eminence and mandibular condyle head were examined using PR and CBCT images of patients with TMD symptoms. Results: The most occurrences of flattening were detected in the mandibular condyle heads using PRs, and the most of erosions were found in CBCT images. In both imaging methods, cortication of both the mandibular condyle head and articular eminence was the same or higher than that of the surrounding structures. PR showed high specificity and negative predictive values in detecting mandibular condyle osseous changes. PR revealed greater sensitivity and positive predictive values if the cortication of the mandibular condyle head and articular eminence was the same or higher than that of the surrounding structures. Conclusions: TMDs often result in the flattening and erosion of the mandibular condyle. PR and CBCT images demonstrate that the cortication of the mandibular condyle and articular eminence in patients with TMDs indicates the same or higher intensity than that of the surrounding structures. PR alone may be insufficient to evaluate osseous changes in the mandibular condyle and cortication of the temporomandibular joint. Three-dimensional imaging methods, such as CBCT, may be required for a more comprehensive evaluation. © 2025 Polish Dental Association.Öğe Cone-Beam Computed Tomography Assessment of Morphologic and Anatomic Changes of the Nasopalatine Canal: Cross-Sectional Study(Univ Indonesia, Fac Dentistry, 2023) Tercanlı, Hümeyra; Taş, Ayşe; Coşan Ata, GamzeObjective: To reveal the morphological and anatomical structure of the nasopalatine canal (NPC) and analyze its measurements via cone-beam computed tomography (CBCT). Methods: A total of 246 CBCT images were included in the study.) NPC diameter, length, angle, distance from the IF to buccal bone (M1), distance from the NF to buccal bone (M2), and the distance from the middle of the NPC to buccal bone (M3) were measured. Statistical significance was assumed at p < 0.05. Results: There was a significant difference between gender and NPC length, M1 and M3 (p = 0.008, p = 0.019 and p < 0.001, respectively), and between the presence of teeth in the anterior maxilla and M1 (p < 0.001). There was a significant difference between the shape of NPC in the coronal plane and NPC angle (p = 0.012) and between the shape of NPC in the sagittal plane and NF diameter, IF diameter, M1 and the M3 (p < 0.001, p = 0.006, p = 0.031 and p < 0.001, respectively). Conclusion: NPC variations, gender, and the presence of teeth in the anterior maxilla could affect NPC measurements. Physicians planning surgery in the anterior maxilla should pay attention to this situation.Öğe Students' Perceptions About the Instructors' Competence in Technology-supported Courses at Dental Faculty: A Cross-sectional Study(Aydın Adnan Menderes University, 2023) Çetin Genç, Çiğdem; Deniz, Yeşim; Genç, Celal; Değirmenci, Alpin; Tosun, İlgiObjective: The pandemic has highlighted the importance of technology-supported courses throughout the world. Evaluating the perceptions of students attending these courses is important to provide high-quality education. Materials and Methods: This study was carried out on 1st, 2nd, and 3rd-grade dentistry students. The Student Perceptions Scale Regarding the Knowledge of Instructors in Technology - Supported Classrooms was applied to 207 dentistry students. This scale consists of four sub-dimensions: subject matter knowledge (SMK), technological knowledge (TK), knowledge of students' understanding (KSU), and technological pedagogical content knowledge (TPCK). Results: SMK, KSU, and TPCK sub-dimension scores did not significantly differ by gender (p>0.05). However, the mean TK score of females (3.55 +/- 0.47) was found to be significantly higher than that of males (3.28 +/- 0.59) (p=0.001). There was no statistically significant difference among the SMK, TK, KSU, and TPCK sub-dimension mean scores by age (p>0.05). There was a statistically significant difference in the mean scores of the SMK and KSU sub-dimensions by grade (p-values are p<0.001 and p=0.015 respectively). The mean TK and TPCK sub-dimension scores yielded no significant difference by grade (p-values are p=0.368 and p=0.050 respectively). Conclusion: Measuring the quality of technology-assisted teaching and the instructor's TPCK from the student's perspective and determining student perceptions will provide accurate data on the long-term quality of education.Öğe The usefulness of ultrasonography as a dynamic measurement system for visualizing root canal working length: an in vivo study(BMC, 2024) Eren, İrem; Deniz, YeşimObjectiveAlthough apex locators are generally effective tools for determining root canal working length, they may produce inaccurate results in some cases. The present study aimed to evaluate the efficacy of ultrasonography as an alternative method for measuring root canal length.Materials and methodsForty-seven anterior teeth with apical lesions were selected for the study. Initially, an electronic apex locator was used to measure the working length. Subsequently, ultrasonography was employed to visualize the root apex and determine the working length. During ultrasound imaging, a K-file No. 15 was inserted into the root canal until its tip was visible on the ultrasound monitor. Measurements obtained from both methods were compared using an independent sample t-test. Correlations were assessed with the Pearson correlation coefficient, and agreement was determined using the Bland-Altman plot.ResultsThe mean working canal length was 19.9 mm for the apex locator and 20.6 mm for the ultrasonography-guided method. No significant differences were observed between the data obtained using the apex locator method and the data obtained using the ultrasonography guidance method. Furthermore, a high level of agreement was identified between the two techniques.ConclusionUltrasonography can be used to visualize the apex effectively and determine canal length, especially when canal length determination is uncertain for various reasons.Öğe Can ultrasonography be used to determine working length in endodontic treatment? An in vitro study(Springer, 2024) Eren, İrem; Sarıyılmaz, Öznur; Eren, Hakan; Sarıyılmaz, Evren; Uslu, GülşahThis study was conducted to evaluate efficacy of ultrasonography (USG) in determining working length in in-vitro conditions. Twenty five access cavities of maxillary incisor teeth were opened and actual working lengths (AWL) were measured with dental operating microscope. The working length were then measured with an electronic apex locator and USG. USG and apex locator measurements were statistically analyzed using one sample t-test and compared with AWL. The mean AWL measurment was 20.68 mm. USG measured the working length slightly longer (21.09 mm) than the measurements of apex locator (20.64 mm). Statistical analysis showed that the USG method provided similar measurements to electronic apex locators and with no statistical difference with actual working length (P < .05). USG emerges as a promising method for working length measurement that allows simultaneous visualization of root tip anatomy in cases where electronic apex locators may be insufficient and there is buccal cortical bone loss.Öğe Evaluation of the Effectiveness of Polyether Silicone-based and Polyvinyl Siloxane Dental Impression Materials for Shielding Scattered Radiation During Radiotherapy(Aydın Adnan Menderes University, 2023) Deniz, Yeşim; Aktaş, Çağatay; Işıktaş Acar, EzgiObjective: Radiation-induced oral mucositis is a major problem associated with radiotherapy. This study aimed to investigate the effectiveness of polyether silicone-based (PE) and polyvinyl siloxane (PVS) impression materials in protecting adjacent tissues from radiation scattered from dental materials. Materials and Methods: Amalgam, zirconium, and titanium dental material specimens were covered with 5 mm PE and PVS in the study group. The dental materials were placed in a linear accelerator device at a distance of 100 cm from the radiation source and coincided with a field size of 15x15 mm. Samples placed perpendicular to the central beam were irradiated with 6 MV photons at a fractional daily therapeutic radiation dose of 2 Gy. Thermoluminescent dosimeters (TLD-100) placed 90 degrees lateral to the specimens were used to record the scattered dose data. In the control group, uncovered dental materials were irradiated, and scattered doses were measured by TLD. The TLD data of the study and control groups were compared by independent t-test to analyze the shielding effect of PE and PVS. In addition, the photon stopper properties of PE and PVS were compared. The photon interaction parameters and effective atomic numbers of dental materials were calculated. Results: It was calculated that the PE and PVS significantly prevent the dose enhancement caused by dental materials (p<0.05). There was no difference between impression materials in the photon-stopping properties (p>0.05). Conclusion: PE and PVS can be used as scatter dose shields for the 2 Gy daily fractional dose. This study demonstrates the radiation-shielding properties of PE for the first time.Öğe Investigation of Dosage Distributions of Polyvinyl Siloxane Dental Impression Shields for Head and Neck Radiotherapy with Thermoluminances Dosimeters(Marmara University, 2023) Ulusoy Öztürk, Habibe; Deniz, Yeşim; Aktaş, Çağatay; Gül Aygün, Esma BaşakObjective: This study aimed to assess the effects of denture materials on dose distribution on a head and neck radiotherapy-appropriate model and calculate the thickness of a stent by polyvinyl siloxane dental impression material for shielding scattered radiation from dental restorations. Methods: In the first step of the study, 5mm diameter and 5mm height of cylindrical dental material of titanium, zirconia lithium disilicate were irradiated with 6-Megavoltage photons from a clinical linear accelerator. In the second step, dental materials at the center of polyvinyl siloxane thicknesses of 5, 10, and 20mm were irradiated with 2 Gray and 10 Gray fractional doses. Measurements were made using three thermoluminescent dosimeters positioned laterally. The percentage backscattered dose and percentage dose decrease values were calculated to interpret the results. Results: According to the result, dosages scattered from dental materials increased for samples irradiated with 2Gy; a decreased dose was reported for samples irradiated with a 10Gy. 5mm PVS samples provided higher dose attenuation than others. Regardless of dental material, it is seen that the attenuation intensities calculated from TLD-100 dosimeters ranged from 22.7 to 38,62 for 2Gy, and 10.01 to 38,87 for 10Gy. Conclusion: Dental material alters the scattered radiation. In irradiated head and neck cancer patients, a 5mm thick guard is sufficient to prevent radiation diffused from dental materials in clinical usage.Öğe Can ultrasonography be used to detect root perforation? An in vitro study(Wiley, 2025) Sarıyılmaz, Öznur; Eren, İrem; Sarıyılmaz, Evren; Eren, Hakan; Uslu, GülşahThis study assessed the usability of ultrasonography in detecting root canal perforations. The buccal side of incisor root were perforated. The actual lengths up to the perforation site were measured by visualisation of the tip of a file. Specimens were embedded in gypsum, and it was scraped to simulate bone resorption. Resorption cavities were filled with ultrasound gel. Measurements were taken by advancing a file through the canal until the tip became visible in the ultrasound image. 3D scans were obtained using cone-beam computed tomography (CBCT) and the distance between the coronal point of the resorption cavity and the reference point was measured. The actual distance of the resorption cavity from the reference point varied 6-10.6 mm. The same distances were measured via ultrasound as 5.7-10.9 mm, while measured using CBCT 6-10.5 mm. No significant differences were found. Ultrasonography shows promise for detecting root perforations, however further research is needed.Öğe ORAL SQUAMOUS CELL CARCINOMA OF TONGUE IN A YOUNG WOMAN WITH LOW RISK: A CASE REPORT(PLEKSUS BİLİŞİM, 2023) Polat, Elif; Eren, Hakan; Özlü, Mert; Gökçen, Mustafa Kürşat; Tüzüner, Ayşegül MineThe increase in the incidence of squamous cell carcinoma in the lateral part of the tongue in young, non-smoking and female individuals in recent years and the fact that HPV and other viral factors remain etiologically unclear in these cancers indicate that different etiopathologies should be investigated in lateral SCC of the tongue. The case is the first reported case of OSCC after orthodontic treatment in a low-risk young female patient.Öğe Is Tonsillolith a Protective Factor Against Covid-19 ?(Ankara Üniversitesi Diş Hekimliği Fakültesi, 2024) Günen Yılmaz, Sevcihan; Coşan Ata, GamzeObject: Tonsilloliths are the most common calcifications of the head and neck region and are also caused by inflammation of the pharyngeal lymphoid tissue. Changes that may occur in the lymphoid tissue due to tonsilloliths may affect the response to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This radiological study aims to investigate the potential effect of tonsilloliths on Coronavirus disease 2019 (COVID-19). Material and Methods: This study, which has a cross-sectional retrospective design, was carried out by evaluating the digital panoramic radiographs taken before the pandemic period of the patient group (n=402) who had COVID -19, who applied to the Akdeniz University Faculty of Dentistry Oral, Dental and Maxillofacial radiology clinic, and the control group (n:400) who did not have COVID -19, in terms of the presence of tonsilloliths. All Statistical analyzes were performed with SPSS version 22.0 and P <0.05 was considered to indicate statistical significance. The Chi-square test and Student's t-test were performed. Results: The incidence of tonsillolith was significantly lower in the patient group (29.1%) than in the control group (45%) (p <0.01). Both groups were similar in terms of age, gender, and systemic disease status (p = 0.1, 0.08, and 0.08, respectively). Tonsilotiths were located both uni and bilaterally (p = 0.09), but unilateral ones were more common on the right side (p = 0.04). Conclusions: The results of this study showed that high-frequency tonsilloliths may have a protective effect against COVID -19.Öğe Ultrasound examination of various dental materials and foreign bodies(Ankara University, 2023) Deniz, Yeşim; Sessiz Ak, Rüya; Eren, HakanPurpose To provide information on the sonographic properties of different foreign bodies and dental materials to help with diagnosis. Materials & Methods The investigation contained 10 various dental materials and foreign bodies that were consisting of composite, glass ionomer cement, gutta percha, suture, wooden, stone, canal file, acrylic, alginate, and silicone impression material. The objects were embedded to chicken meat and imaged using ultrasonography (USG). Their visibility and posterior acoustic behaviors were evaluated by both hockey and linear transducers. The actual sizes of this objects and measured dimensions by transducers were compared. Results Only gutta percha could not be distinguished in chicken meat. No difference was observed between the measurements made with the hockey and linear transducers and the actual size. Conclusion USG is a useful method for detecting and measuring foreign bodies and dental materials in soft tissues.Öğe Do age and sex factors affect dentin thickness of mandibular incisors?(Türk Endodonti Derneği, 2023) Sarıyılmaz, Öznur; Sessiz, RüyaPurpose: The purpose of this study was to evaluate the root dentinal thickness of the mandibular inci- sor teeth in relation with the age and sex using cone-beam computed tomography (CBCT). Methods: CBCT images of 320 mandibular incisors of 40 male and 40 female patients were analyzed ret- rospectively. The mesial and distal dentinal thickness was measured at three points as coronal, middle, and apical root canal thirds. The images were analyzed using a software and analyzed to investigate the differences in the dentinal thickness association between age and sex. Results: Dentinal thickness decreased significantly from coronal to the apical root canal level. The mid- dle and apical dentinal thickness of mesial side the roots were found significantly higher than the distal side of the root. Conclusion: The coronal and apical dentinal thickness of the roots was found to be higher in males than females while the middle root dentinal thickness was found to be higher in females than males. It was found that dentinal thickness increased with age only in the coronal root region.Öğe The Impact of Coronal Flaring Files on Pericervical Dentin Thickness in Mandibular Molars(American Association of Endodontists, 2024) Sarıyılmaz, Öznur; Sessiz, Rüya; Kocaman, Osman SefaIntroduction: This study aimed to assess the influence of different coronal flaring files on dentin removal in mandibular teeth using cone-beam computed tomographic (CBCT) images. Methods: CBCT images of 48 mandibular molar teeth were acquired and randomly divided into 2 main groups, with each main group further divided into 3 subgroups. In the first main group, root canal preparation was performed using TruNatomy (Dentsply Sirona, Ballaigues, Switzerland), ProTaper Gold (Dentsply Sirona), and One Curve (Micro-Mega, Besancon, France) files without the use of coronal flaring files. In the second main group, root canal preparation was performed using the same files with the use of coronal flaring files. After the completion of root canal preparation, a second set of CBCT images was obtained. Subsequently, the dentin removal and remaining critical dentin were assessed by measuring at 4 distinct points below the furcation level. Data were compared between groups using the Mann-Whitney U and Kruskal-Wallis tests with alpha set at 5%. Results: The ProTaper Gold files demonstrated higher dentin removal compared with the TruNatomy files. In the no-flaring groups, the One Curve files exhibited greater dentin removal than the TruNatomy files at specific levels. The use of coronal flaring files generally did not significantly impact dentin removal, except for certain cases in the TruNatomy and ProTaper Gold groups. Conclusions: The TruNatomy instrument group was more effective in preserving pericervical dentin compared with the other instrument groups. Coronal flaring files can be confidently used to preserve critical dentin during root canal treatment.Öğe Evaluation of the differences in the localization of the lingula mandibulae according to pubertal development in children: A new anthropological and forensic approach(Elsevier Ltd, 2024) Eren, Hakan; Sezer, Berkant; Deniz, YeşimObjective: This study aims to investigate changes in lingula mandibulae localization before and after puberty and sex differences. Design: 288 panoramic radiographs evaluated retrospectively were divided into four groups according to pubertal development: under and over 10 years old for females and under and over 11 years old for males. Four anatomic sites were used as reference points: (a) the anterior border of the ramus; (b) the posterior border of the ramus; (c) the deepest point of mandibular notch; and (d) the angulus mandibulae. The ratio of the distances from the lingula mandibulae to points (a) and (b) and the ratio of the distances from the lingula mandibulae to points (c) and (d) were determined. Two-way ANOVA was performed to assess differences between subgroups based on sex and puberty, and a Bonferroni post-hoc test was performed for multiple comparisons. Results: Puberty and sex has a significant interaction effect on the vertical location of the lingula mandibulae. Postpubertal lingula mandibulae is positioned proportionally more anteriorly by prepubertal localization. In addition, the lingula mandibulae is situated more posteriorly in females compared to males. A significant interaction effect of puberty and sex was observed in relation to the vertical positioning of the lingula mandibulae. Conclusions: The spatial localization of the lingula mandibulae and its spatial displacement with age can be used both in estimating sex and the onset of puberty. Changes in the localization of lingula mandibulae according to pubertal development and sex can be used in forensic and anthropological contexts.Öğe Comparison of CBCT radiation doses with conventional radiographs in TMJ imaging using Monte Carlo simulations(Springer Science and Business Media Deutschland GmbH, 2024) Deniz, Yeşim; Eren, Hakan; Sessiz, Rüya; Coşan Ata, GamzeThree-dimensional imaging methods are widely used for evaluation of bony changes of temporomandibular joint (TMJ). Besides, lateral and posterio-anterior TMJ projections in both closed- and open-jaw positions for each temporomandibular joint are used as two-dimensional diagnostic tools. The purpose of the present study was to compare effective and mean organ absorbed doses of plain radiography techniques with those of different modalities of cone beam computed tomography (CBCT) scanning of an adult’s temporomandibular joint. PCXMC 2.0 software was used to calculate mean organ and effective doses. A NewTom CBCT device (Newtom 5G XL; QR systems; Verona, Italy) was simulated at 360° rotation using a 6 × 6 cm2 FOV in standard and high-resolution modes. Lateral and posterio-anterior TMJ plain projections were simulated according to recommendations of the manufacturer of the Planmeca ProMax® 2D S3 device. Doses for both projections were simulated with Monte Carlo methods and the International Commission on radiological protection adult reference computational phantoms. The highest mean organ absorbed doses occurred in bone surfaces, salivary glands, and skull for posterio-anterior TMJ and lateral TMJ, and for CBCT scanning in all examinations. The effective doses of posterio-anterior and lateral TMJ plain radiographs were found to be higher than those of the Standard Mode-Eco Scan CBCT. Therefore, the lowest effective dose was calculated in Standard Mode-Eco Scan CBCT. It is concluded that NewTom 5G XL Standard Mode-Eco Scan CBCT can be used instead of plain radiographs (lateral and posterio-anterior TMJ) in temporomandibular joint imaging as it allows visualizing the three-dimensional structure of the temporomandibular joint as an advantage.Öğe Comparison of Dental and Skeletal Age Estimating Methods in Children(University of Zagreb, 2023) Çelik Güler, Özge; Deniz, Yeşim; Arslan, SemihaObjectives: Estimating age is a crucial determinant of forensic science. Various methods have been used to estimate dental age (DA) and skeletal age (SA).The aim of the current study was to compare the Cameriere's DA method with the Cameriere's SA method in estimating CA in children. Materials and methods: A total of 216 radiographs of 130 females and 86 males (between 9 to 14.99 years of age) were evaluated in northwestern Turkey. DA was calculated on the panoramic images using Cam-eriere's open-apex method. SA was determined on the lateral cephalograms using the fourth cervi-cal vertebrae method by Cameriere. The DA, SA, and CA data were compared using a paired t-test and Wilcoxon test. Results: The mean CA of all groups was calculated as 12.96 +/- 0.30, the mean DA of 12.74 +/- 0.68 and the mean SA of 12.89 +/- 0.89. In males, the DA method presented an underestima-tion between ages of 14.00 and 14.99 (p<0.05) and an overestimation between ages 9.00 and 11.99 (p<0.05). In females, the DA method showed an underestimation in the 13.00-and 14.99-year-old age groups (p<0.05) and an overestimation in the 10.00-and 11.99-year-old age groups (p<0.05). The SA method revealed a significant underestimation in females between the ages of 13.00 and 14.99 and in males between the ages of 14.00 and 14.99 (p<0.05). Conclusions: The SA estimation method may provide more accurate results compared to the DA method with children of both sexes aged between 9.00 to 12.99 in the determination of CA.
