Diş Hekimliği Fakültesi / Faculty of Dentistry
Permanent URI for this collectionhttps://hdl.handle.net/11727/2120
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Item Use of Cone-Beam Computed Tomography in Diagnosis of An Otherwise Undetected Periapical Lesion in An Anomalous Tooth(2014) Gulsahi, Ayse; Ates, Ufuk; Tirali, Resmiye Ebru; Cehreli, Sevi Burcak; https://orcid.org/0000-0001-6487-3984; HGA-3970-2022; AAD-2907-2020; AAD-6138-2021Fusion is a developmental anomaly of dental hard tissues. Since dental fusion is characterized by irregular coronal morphology and a complex endodontic anatomy, endodontic therapy of such teeth may present a serious clinical challenge. Cone-beam computed tomography (CBCT) is a useful tool for the management of complex endodontic problems and dental anomalies. In the case presented here, a CBCT scan revealed morphological details as well as the severity of periapical infection that had not been visualized with conventional imaging techniques. The results obtained with detailed imaging led to a change in the treatment plan.Item Dental Anxiety and Fear: Relationship with Oral Health Behavior in a Turkish Population(2014) Yozugullu, Bulem; Gulsahi, Ayse; Celik, Cigdem; Bulut, Sule; https://orcid.org/0000-0002-5936-0196; 24392477; AAA-1576-2021; AAC-5448-2020The aim of this study was to assess fear and anxiety in dental patients. Five hundred patients were evaluated using the Modified Dental Anxiety Scale and the Dental Fear Scale, along with a questionnaire. Oral health status was assessed using the Decayed, Missing, and Filled Teeth (DMFT)/Decayed, Missing, and Filled Surfaces (DMFS) index. Statistic al analysis was performed (P <.05). Sex significantly affected dental anxiety (P <.05), and sex, marital status, having children, and time elapsed since last visit to clinician affected dental fear (P <.05). DMFT/DMFS scores were not related to dental anxiety or fear (P >.05). Female sex alone was a significant predictor of dental anxiety; female sex, adulthood, marriage, having children, and time passed since last visit to a clinician are significant predictors of fear.Item Third Molar Maturity Index (I-3M) Assessment According to Different Geographical Zones: A Large Multi-Ethnic Study Sample(2022) Angelakopoulos, Nikolaos; De Luca, Stefano; Oliveira-Santos, Ines; Ribeiro, Isabella Lima Arrais; Bianchi, Ilenia; Balla, Sudheer B.; Kis, Hatice Cansu; Jimenez, Lourdes Gomez; Zolotenkova, Galina; Yusof, Mohd Yusmiaidil Putera; Selmanagic, Aida Hadzic; Pandey, Hemlata; Pereira, Palmela C.; da Nobrega, Johnys Berton Medeiros; Kalani, Hettiarachchi; Mieke, Sylvia M.; Kumagai, Akiko; Gulsahi, Ayse; Zelic, Ksenija; Marinkovic, Nemanja; Kelmendi, Jeta; Galic, Ivan; Vazquez, Israel Soriano; Spinas, Enrico; Velezmoro-Montes, Ymelda Wendy; Moukarzel, Maria; Toledo, Jorge Pinares; El-Bakary, Amal Abd El-Salam; Cameriere, Roberto; 36520207Identification of living undocumented individuals highlights the need for accurate, precise, and reproducible age estimation methods, especially in those cases involving minors. However, when their country of origin is unknown, or it can be only roughly estimated, it is extremely difficult to apply assessment policies, procedures, and practices that are accurate and child-sensitive. The main aim of this research is to optimize the correct classification of adults and minors by establishing new cut-off values for four different continents (Africa, America, Asia, and Europe). For this purpose, a vast sample of 10,701 orthopantomographs (OPTs) from four continents was evaluated. For determination and subsequent validation of the new third molar maturity index (I-3M) cut-off values by world regions, a cross-validation by holdout method was used and contingency tables (confusion matrices) were generated. The lower third molar maturity indexes, from both left and right side (I3ML and I3MR) and the combination of both sides (I3ML_I3MR) were calculated. The new cut-off values, that aim to differentiate between a minor and an adult, with more than 74.00% accuracy for all populations were as follows (I3ML; I3MR; I3ML_I3MR, respectively): Africa = (0.10; 0.10; 0.10), America = (0.10; 0.09; 0.09), Asia = (0.15; 0.17; 0.14), and Europe = (0.09; 0.09; 0.09). The higher sensitivity (Se) was detected for the I3ML for male African people (91%) and the higher specificity (Sp) of all the parameters (I3ML; I3MR; I3ML_I3MR) for Europeans both male and female (> 91%). The original cut-off value (0.08) is still useful, especially in discriminating individuals younger than 18 years old which is the goal of the forensic methods used for justice.Item Pre-eruptive Intracoronal Resorption of Permanent Dentition: A New Classification and a Multidisciplinary Study(2023) Yuksel, Halil Tolga; Turkmenoglu, Aysegul; Celikkol, Berk; Evirgen, Sehrazat; Gulsahi, Kamran; Gulsahi, Ayse; https://orcid.org/0000-0003-3510-7265; 36317538The aims of this study were to develop a new classification for pre-eruptive intracoronal resorption(PIR) with different resorption areas and sizes and to compare the new classification scores among observers from different specialities and professional experience. The PIR was evaluated according to the new classification by two dentomaxillofacial radiologists and two endodontists. Information regarding the patient's age, gender, systemic diseases, the number of PIR, the affected tooth area and the size of the PIR was recorded. The new classification system showed that PIR six and seven defects were the most detected. Regarding jaw regions, the highest reliability was seen in the maxillary central teeth between observers I and IV, and maxillary premolar-molar teeth between observers II and III. This study revealed that PIR can be found in both root and crown dentine. Professional experience and specialty and awareness of the PIR defect may affect the diagnosis.Item Relationship Between Maxillary Sinus Pathologies and Maxillary Posterior Tooth Periapical Pathologies(2016) Kasikcioglu, Ahmet; Gulsahi, AyseTo determine the prevalence of odontogenic maxillary sinus pathologies and their relationship with periapical pathologies in the maxillary posterior teeth using cone-beam computed tomography (CBCT). Maxillary posterior CBCT scans of consecutive patients aged 20-77 years were evaluated retrospectively. Patients with at least one maxillary posterior tooth were included. Patients with edentulous maxillae or having one or more maxillary implants were excluded. Finally, 461 CBCT images were evaluated. Demographic data, such as age and sex, and pathologic findings of the right and left maxillary sinuses and adjacent teeth were recorded. Statistical analyses were performed using the Chi square test and binary logistic regression. The prevalence of right and left odontogenic maxillary sinusitis was 59.5 and 64 %, respectively. Maxillary sinus pathology was more common in males, and there was no relationship with age. Regarding the maxillary sinus pathology, 64 % had mucosal thickening, 19 % had partial opacification, 5 % had total opacification, and 12 % had polypoidal mucosal thickening. Right and left maxillary sinus pathologies were approximately twice as prevalent in patients with periapical pathology in at least one maxillary posterior tooth. Periapical pathologies in the right maxillary first molar and left maxillary first and second molars significantly increased the risk of maxillary sinus pathology with odds ratios of 2.53, 1.83, and 3.12, respectively. Odontogenic maxillary sinus pathologies were present in > 50 % of the study population. Periapical pathologies in the maxillary first and second molar teeth significantly increased maxillary sinus pathologies.Item Accuracy of The Third Molar Index for Assessing the Legal Majority of 18 Years in Turkish Population(2016) Gulsahi, Ayse; De Luca, Stefano; Cehreli, S. Burcak; Tirali, R. Ebru; Cameriere, Roberto; https://orcid.org/0000-0001-6487-3984; 27344224; AAD-6138-2021; HZK-4947-2023In the last few years, forced and unregistered childmarriage has widely increased into Turkey. The aim of this study was to test the accuracy of cut-off value of 0.08 by measurement of third molar index (I-3M) in assessing legal adult age of 18 years. Digital panoramic images of 293 Turkish children and young adults (65 girls and 128 boys), aged between 14 and 22 years, were analysed. Age distribution gradually decreases as I-3M increases in both girls and boys. For girls, the sensitivity was 85.9% (95% CI 77.1-92.8%) and specificity was 100%. The proportion of correctly classified individuals was 92.7%. For boys, the sensitivity was 94.6% (95% CI 88.1-99.8%) and specificity was 100%. The proportion of correctly classified individuals was 97.6%. The cut-off value of 0.08 is a useful method to assess if a subject is older than 18 years of age or not. (C) 2016 Elsevier Ireland Ltd. All rights reserved.Item Does Radiopacity of Restorative Materials Change with Aging?(2017) Tuncer, Duygu; Gulsahi, Ayse; Cehreli, Sevi Burcak; Arhun, Neslihan; AAD-6138-2021; R-2536-2019Background: Dental materials should be radiopaque enough to be identified from enamel and dentin and enable the detection of secondary caries, marginal defects. The aim was to evaluate the radiopacity of restorative materials after 6 months of aging in distilled water. Material and Methods: Twenty-two restorative materials were used and the radiopacity them were first evaluated after setting and after 6-months of storage in distilled water. Human primary and permanent tooth slices were also used in the study. Restorative material specimens were prepared by using Teflon molds. Twelve specimens were prepared for each material group. All specimens were exposed together with an aluminum stepwedge using a phosphor plate. The analysis was made with Digora system. Results: Filtek-Silorane, Aelite-LSPosterior, Theracal-LC, Biodentine, Ionofil-U, Vitrebond and GCP-Glass-Seal exhibited lower radiopacity values at the initial setting and after 6-months of aging with respect to permanent enamel. When compared with deciduous enamel, Filtek-Z550, Charisma, Riva-Light Cure and Equia-Fil exhibited lower radiopacity values at both readings. Spectrum-TPH, Filtek-Ultimate, Clearfil-Majesty Flow, Sultan-Versa, IRM and Adhesor exhibited statistically significant higher values of radiopacity at the 6-month evaluation. Conclusion: The radiopacity of restorative materials is dependent on the material type exerting different radiopacity values after 6-months.Item Change in Periapical Lesion and Adjacent Mucosal Thickening Dimensions One Year after Endodontic Treatment: Volumetric Cone-beam Computed Tomography Assessment(2017) Kamburoglu, Kivanc; Yilmaz, Funda; Gulsahi, Kamran; Gulen, Orhan; Gulsahi, Ayse; https://orcid.org/0000-0003-3510-7265; 28132708; AAX-5565-2021Introduction: Changes in periapical lesion dimensions along with mucosal thickening after endodontic treatment have not been studied yet. Therefo1e, the objectives of this study were (1) to obtain linear and volumetric measurements of lesion dimensions in maxillary first molars with periapical pathology and (2) to measure maxillary sinus mucosal thickening in the vicinity of periapical lesions before and 1 year after endodontic treatment by using cone-beam computed tomography (CBCT). Methods: Twenty-one maxillary first molar teeth of 21 patients (14 female and 7 male) with periapical lesion that had local mucosal thickening in the vicinity of the periapical lesion were endodontically treated. A total of 21 maxillary first molar roots (8 mesiobuccal roots, 6 distobuccal roots, and 7 palatal roots), each one from different patients, was included. Pretreatment and 1-year post-treatment CBCT images of each tooth were obtained by using Kodak CS 9300 3D CBCT unit. Width, height, surface area, and volume measurements of periapical lesions and mucosal thickening of the maxillary sinus mucosa in the vicinity of the periapical lesion were measured before and 1 year after endodontic treatment. General linear model (analysis of variance) was used for the comparisons between measurements, and significance was set at P <.05. Regression analysis was also used to test the correlation between different measurements. Results: We found statistically significant differences between mean pretreatment and mean post-treatment measurements conducted by using CBCT images (width, P =.002; height, P <.001; maximum mucosal thickening, P <.001; medium mucosal thickening, P <.001; minimum mucosal thickening, P <.001; surface area, P =.032; and volume, P =.034). Considering gender, age, and root type variables, no significant differences were found for all the measurements conducted (P >.05). There were 36%, 41%, 53%, 54%, 53%, 73%, and 75% mean reductions in lesion width, lesion height, maximum sinus mucosal thickness, medium sinus mucosal thickness, minimum sinus mucosal thickness, lesion surface area, and lesion volume, respectively, before and 1 year after endodontic treatment. Regression analysis of pretreatment lesion volume versus percentage of post-treatment lesion volume change revealed a low regression coefficient (R2 = 16.7%, P >.05), showing a weak linear relationship. Conclusions: CBCT assessment of changes in periapical lesion and mucosal thickening dimensions may reveal useful information regarding endodontic treatment success.Item Age estimation in Turkish children and young adolescents using fourth cervical vertebra(2020) Gulsahi, Ayse; Cehreli, Sevi Burcak; Galic, Ivan; Ferrante, Luigi; Cameriere, Roberto; 31915966This study aimed to test radiographic projections of the posterior and anterior sides of the C4 vertebral body for age estimation in a cross-sectional sample of Turkish children and adolescents from the Baskent University Faculty of Dentistry. A sample of 232 x-rays from individuals aged between 5 and 15 years (101 boys and 131 girls) was analysed to investigate the correlation of age and changes in the projection ratio of the anterior and posterior sides of the body of the fourth cervical vertebra (Vba) in lateral cephalograms. The Normal Bayesian Calibration (NBC) model for age estimation was used to assess the relationship between Vba and age. The intra-observer repeatability and inter-observer agreement were 0.95 and 0.94, respectively. Age distribution gradually increased as Vba increased up to 14 years in both sexes. The difference between chronological and estimated ages did not increase with the increase in age. Calibration distributions of the dataset by the evaluation of Vba suggested mean absolute errors (MAEs) of 0.879 years and 0.906 years (mean interquartile ranges (MIQRs) 1.290 and 1.435 years)) in boys and girls, respectively. The biases of the estimates (beta(ERR)) were 0.013 and 0.027 for boys and girls, respectively. In conclusion, the NBC method on Vba variable appears to be suitable for age estimation in Turkish children and adolescents.Item Evaluation of maxillary trabecular microstructure as an indicator of implant stability by using 2 cone beam computed tomography systems and micro-computed tomography(2019) Kulah, Kivanc; Gulsahi, Ayse; Kamburoglu, Kivanc; Geneci, Ferhat; Ocak, Mert; Celik, H. Hamdi; Ozen, Tuncer; 30595501Objective. The aim of this study was to assess the trabecular microarchitecture of the maxilla by using cone beam computed tomography (CBCT) and micro-computed tomography (micro-CT) ex vivo. Study Design. Seventeen maxillary cadaver specimens were scanned by using micro-CT and CBCT devices. Samples were scanned with 2 CBCT devices at different voxel sizes (0.08, 0.125, and 0.160 mm for 3-D Accuitomo 170; 0.75 and 0.200 mm for Planmeca Promax 3-D Max). Morphometric parameters, such as bone volume/total volume (BV/TV) ratio, trabecular thickness (Tb.Th), trabecular separation (Tb.Sp), trabecular number (Tb.N), and degree of anisotropy (DA) were assessed by using CTAnalyzer software. Bland-Altman limits of agreement and intraclass correlation coefficient (ICC) were performed to evaluate agreement between CBCT and micro-CT in consideration of measured morphometric parameters. Statistical significance was set at P < .05. Results. The BV/TV, Tb.Th, Tb.Sp, and DA values were higher for CBCT images compared with micro-CT images, whereas the Tb. N value was lower with CBCT images than with micro-CT images. The BV/TV and DA parameters showed the highest agreement between CBCT and micro-CT devices (ICC = 0.421 for BV/TV and ICC = 0.439 for DA; P < .01). Conclusions. The BV/TV and DA parameters measured on CBCT obtained at the smallest voxel size were found to be useful for the assessment of maxillary trabecular microstructure.