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 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 Evaluation of the Appearance, Location and Morphology of Lingual Foramens in Dentates and Edentulous Mandibles Using CBCT(2022) Citir, Mesude; Karslioglu, Hazal; Sumer, Ayse Pinar; Kasap, PelinObjective: The lingual foramen (LF) in the anterior mandibular region is important for surgical planning. Our aim was to assess the anatomical variations of the mandibular LF and canals using cone beam computed tomography (CBCT). Materials and Methods: CBCT images of 148 patients were evaluated. The LF presence, number, position, diameter and trajectory was established. The relationship between the findings and gender, dental status was evaluated using Mann-Whitney U, independent samples t-test, and Spearman correlation. Results: Of 102 patients, 5.9% had the inferior foramen, 60.8% had the superior foramen, and 33.3% had two foramina. The average diameter of the inferior LF was 1.08 mm and superior LF was 1.21 mm. There is a statistical difference between genders according to the diameter of the inferior LF (p=0.031). Conclusion: Due to the prevalence of foramines of different sizes and locations, we recommend assessing with CBCT before surgical procedures.Item Marginal fit of 3-unit CAD-CAM zirconia frameworks fabricated using cone beam computed tomography scans: an experimental study(2021) Belgin, Huseyin Berkay; Kale, Ediz; Ozcelik, Tuncer Burak; Yilmaz, Burak; 34665345Whether cone beam computed tomography (CBCT) scans can be used for the fabrication of computer-aided design and computer-aided manufacturing (CAD-CAM) fixed dental prostheses (FDPs) is not known. The purpose of the present study was to compare the marginal fit of 3-unit zirconia FDPs fabricated by using CBCT or 3-dimensional (3D) laboratory scanning. Extracted second premolar and molar teeth in a maxillary typodont model were prepared. The first molar was removed and the typodont model was scanned with a laboratory or a CBCT scanner to generate two virtual 3D cast groups (3DL and CBCT). Forty four 3-unit zirconia FDPs were designed on virtual casts and milled. The vertical marginal discrepancy (VMD) was measured by x100-magnification microscopy at seven locations on each abutment. A total of 616 measurements were made at 14 fixed locations in two groups of 22 specimens. The VMD data for 3DL and CBCT groups were statistically analyzed using the Mann-Whitney U test (alpha = 0.05). The mean VMDs on premolar ranged between 44 and 55 mu m (median: 43-55 mu m) in 3DL, and 74 and 100 mu m (median: 72-93 mu m) in CBCT; and on the molar, between 47 and 114 mu m (median: 46-114 mu m) in 3DL, and 91 and 162 mu m (median: 93-156 mu m) in CBCT. There was a significant difference between the gaps in 3DL and CBCT groups (p < 0.001). FDPs fabricated using 3D laboratory scanner had significantly smaller VMDs. Nevertheless, the 3-unit zirconia FDPs fabricated using CBCT scans presented promising marginal integrity.Item Relationship between alveolar bone thickness, tooth root morphology, and sagittal skeletal pattern: A cone beam computed tomography study(2019) Coskun, Ipek; Kaya, Burcak; 30980091PurposeThe goal of this work was to examine the relationship between sagittal facial pattern and thickness of alveolar bone in conjunction with root morphology of teeth by using cone beam computed tomography (CBCT).MethodsThe study was carried out on the CBCT scans from 3group of patients (n=20 in each group). The first group involved skeletal class1, the second group involved skeletal class2, and the third group involved skeletal class3 patients. In all, 14permanent teeth and interdental regions in the maxilla and mandible were evaluated. Root length and root width were measured on each tooth. Buccal cortical bone thickness, cancellous bone thickness, and lingual cortical bone thicknesses were measured in each interdental region. Analysis of variance, Kruskall-WallisH and Mann-WhitneyU tests were used for statistical comparisons.ResultsNo significant difference was found between the groups for root length, root width, buccal cortical bone and lingual cortical bone thickness. A significant difference was observed between the groups for cancellous bone thickness as it was thicker in skeletal class2 group. Cortical bone was thicker in the mandible compared to maxilla on both buccal and lingual sides and it was thicker in the posterior region compared to the anterior region on the buccal side.ConclusionsDifferences in cancellous bone thickness between different sagittal facial patterns and differences in cortical bone thickness between different alveolar regions should be taken into consideration when planning orthodontic tooth movements and anchorage mechanics..Item Appraisal of the relationship between tooth inclination, dehiscence, fenestration, and sagittal skeletal pattern with cone beam computed tomography(2019) Coskun, Ipek; Kaya, Burcak; 30741575Objectives: To examine the relationship between sagittal facial pattern and dehiscence/fenestration presence in conjunction with buccolingual tooth inclination by using cone beam computed tomography. Materials and Methods: The study was carried out on the cone beam computed tomography scans of the following three groups of patients (n = 20 in each group): Class I, Class II, Class III. Buccolingual tooth inclination, buccal dehiscence/fenestration presence, and lingual dehiscence/fenestration presence were evaluated on each tooth. Analysis of variance, Kruskall-Wallis H, Scheffe, and chi-square tests were used for statistical comparisons. Results: Differences (P<.05) were observed between the groups for inclination of upper incisors and all lower teeth except for second molars. Dehiscence prevalence in the upper buccal and posterior buccal regions was higher (P<.05) in the Class I group when compared with the other groups. Lower buccal and anterior buccal regions showed higher (P=.0001) dehiscence prevalence in all groups. No difference was observed in fenestration prevalence between the groups. The upper buccal and anterior buccal regions showed higher (P=.0001) fenestration prevalence in all groups. Conclusions: Orthodontists must consider concealed alveolar defects in treatment planning to avoid gingival recession or tooth mobility.Item Versatility of high resolution ultrasonography in the assessment of granulomas and radicular cysts: a comparative in vivo study(2019) Sonmez, Gul; Kamburoglu, Kivanc; Yilmaz, Funda; Koc, Cemre; Baris, Emre; Tuzuner, Aysegul; 31188679Objectives: To evaluate and compare the diagnostic potential of high resolution ultrasound with periapical radiographs (PR) and CBCT in assessing granulomas and radicular cysts. Methods: This study included a total of 33 teeth from 33 patients with periapical lesions. Subjects were distributed among three groups. A consisted of teeth that were extracted. B consisted of teeth treated with root-canal treatment followed by apical surgery. C consisted of teeth treated with root-canal treatment only. Pre-treatment PR, ultrasound and CBCT images were obtained for Groups A, B and C and 6 month post-treatment PR and ultrasound images were obtained for Groups B and C. In addition, histopathological analysis was performed on lesions in Groups A and B. Lesions were classified as either cystic lesions or granulomas. Width, height, depth, surface area and volume of lesions were measured using the built-in softwares of the appropriate imaging modalities. Measurements were compared by Wilcoxon and paired sample t tests. Ultrasound and histopathological findings were compared with lc and Mc Nemar. Statistical significance was set at p < 0.05. Results: kappa coefficient (0.667; p = 0.002) suggested good agreement between ultrasound and histopathology. No statistically significant differences were found among periapical radiography, CBCT and ultrasound in the pre-treatment measurements of lesion width ( p = 0.308) or between CBCT and periapical radiography in the pre-treatment measurements of lesion height ( p = 0.863). In all cases, mean measurement values for all variables were lower for ultrasound than for CBCT. Conclusion: Ultrasound provided useful information for the diagnosis and assessment of granulomas and radicular cysts.Item Comparison of periapical radiography, panoramic, and cone-beam CT in the detection of dental caries in dog teeth(2019) Orhan, Kaan; Ozemre, Mehmet Ozgur; Secgin, Cansu Koseoglu; Vural, Sevil Atalay; Gur, Gurkan; Kamburoglu, KivancThe aim of this study was to compare the effectiveness of panoramic, periapical and two different Cone Beam Computed Tomography (CBCT) devices in the detection of dental caries of dog teeth ex vivo. A total of 880 teeth were investigated, 33 of which were with caries, whereas; 33 healthy teeth were the controls. Periapical, panoramic and CBCT scans were made for the assessment of the teeth. All images were evaluated separately by two observers experienced in image interpretation. The presence or absence of occlusal caries was scored using a 5-point scale. Kappa values were calculated to assess intra and interobserver agreement. Receiver Operating Characteristic (ROC) analysis was performed to compare the effectiveness of different imaging methods in the detection of dental caries. For both observers, the order of success of the image sets in the estimation of the caries tooth was CBCT Morita, CBCT Iluma, periapical and panoramic radiograph (Area Under Curve (AUC): 0.929, 0.882, 0.861, and 0.704 for observer 1, AUC: 0.927, 0.896, 0.875, and 0.693 for observer 2, respectively). CBCT was found to be the best imaging method for the ex vivo detection of caries in dog teeth. In addition, panoramic images performed worse than all other modalities.