Search

Aim: Dental anomalies are usually detected incidentally on panoramic radiographs taken during routine dental examinations. Incidentally seen anomalies could be seen more clearly in cone-beam computed tomography (CBCT) due to the limitations of two-dimensional radiographs. The aim of this study is to evaluate the localization of dental anomalies in the jaws and gender distribution in patients living in the Western Black Sea region by evaluating the CBCT images previously taken for different reasons retrospectively. Methods: Radiographic data of 207 patients out of 1230 patients who applied to Zonguldak Bülent Ecevit University, Faculty of Dentistry Oral and Maxillofacial Radiology Department and who were requested to have CBCT imaging due to any reasons were included in the research. The distribution of anomalies in CBCT images were scanned retrospectively classified as maxillary - mandibular, unilateral - bilateral, and female-male according to gender. Results: In our study, 105 of 207 patients with dental anomalies were female and 102 were male. An overall of 239 anomalies were detected in 207 patients. The most prevalent dental anomaly in both sexes was determined to be impacted teeth (%46). Considering the localization distribution of the anomalies, the most prevalent anomaly in both the maxilla and mandible was the impacted tooth. Considering the location of the anomalies in the jaws, and anomalies were mostly observed unilaterally (%80). Conclusion: Impacted teeth anomalies were the most prevalent type of dental anomalies in the Turkish subpopulation. CBCT is a very useful method for the detection of dental anomalies, especially root and canal anomalies.

Background:Two-dimensional radiographic techniques are difficult to diagnose in the diagnosis of furcation perforations because of the projection geometry and the anatomical structures’superposition problems. Cone Beam Computed Tomography (CBCT) is more accurate diagnostic modality than conventional imaging methods due to the lack of superposition and lack of magnification.Methods:In this study, 114 lower molar teeth were selected. Biodentin, BioAggregate, BioCeramix, MTA and Endosequence were placed to repair the perforation zone. Periapical radiographs were obtained with Sorodex Digora Optime with phosphorous plaques, other radiographic images were obtained using Planmeca Dixi 3 CCD, while KIBT images were obtained using Morita Veraviewepocs 3D R100. An endodontist and two dentomaxillofacial radiology specialists examined the CBCT images and periapical radiographs.Results:MTA and Biodentine were found to have low image quality, Bioaggregate and Endosequence high image quality. Morita Veraviewepocs 3D R100 showed the highest sharpness, but no difference was observed between Sorodex Digora Optime and Planmeca Dixi 3 devices.Conclusions:Cone Beam Computed Tomography (CBCT) imaging is a superior method in the diagnosis of endodontic furcation perforations compared to two-dimensional methods.Keywords:Cone-Beam Computed Tomography, endodontics, furcation defects

Amaç: Başve boyun bölgesinde konik ışınlı tomografi uygulamaları esnasında hareket vegürültü artefaktı oluşumu oldukça yaygındır. Altta yatan nedenler arasındacihazın uzun çekim süresi, hastaların genel sağlığı nedeniyle kontrolsüzhareketler ve çocuklar gibi hastaların aşırı hareketliliği vardır. Buçalışmada, Photoshop programını kullanarak artefaktları kaldırmak için çeşitlifiltre yöntemleri ve yazılım özellikleri incelenecektir.Gereç ve Yöntemler:Gürültü ve hareket artefaktı bulunan beş farklı imaj seçildi. Bu seçimsonrasında Photoshop filtreleri ile belirli yollar izledi. Programda işlenen vedüzeltilen görüntüler uzman diş hekimleri tarafından değerlendirildi. Görüntüdeğerlendirmelerinde filtrelemeden önce ve sonra, uzmanlar tarafından 1 ila 5puan arasında olmak üzere değerlendirmeler yapıldı. Her imaj 1 çok yetersiz, 2yetersiz, 3 normal, 4 yeterli, 5 çok iyi olarak skorlandı.Bulgular: : 1 ile 5 arasında değerlendirilen 50 adet gürültü artefaktlı imajındeğerlendirilmesi sonucunda, ortalama puan 4.12, hareketli artefaktı bulunanimajlar için ise 1.62'dir. Wilcoxon testinin sonuçlarına göre, hareketartefaktı ve gürültü artefaktı ile kesitlerin postoperatif düzeltme oranıarasında istatistiksel olarak anlamlı bir fark bulundu.Sonuçlar: Konik ışınlı bilgisayarlı tomografi uygulamalarında birçok nedendenötürü oluşabilecek hareket artefaktı ve gürültü artefaktı ile sıkçakarşılaşılmaktadır. Bu gibi durumlarda, Photoshop programında ortaya çıkanartefaktlar tersine çevrilebilir ve görüntüler tanısal açıdandeğerlendirilebilir.Anahtar Kelimeler: konik ışınlıbilgisayarlı tomografi, artefakt, gürültü, photoshop, Background: Patient movement and noise artifacts are quite common during the CBCT exposure in the head and neck region. Among the underlying causes are the long duration of the device, uncontrolled movements due to the general health of the patients, and excessive mobility of the patients such as children. In this study, various filter methods and software features will be examined to remove artifacts by using Photoshop program.Methods: Five different images with noise and motion artifact were selected. These sections were followed by specific paths with Photoshop filters. Images collected and corrected in the program were evaluated by specialist dentists. Before and after the filtering in the image evaluations, 1 to 5 criterions were evaluated by the experts. Each section was scored as 1 very inadequate, 2 inadequate, 3 normal, 4 adequate, 5 very good.Results: As a result of the evaluation of 50 pieces of noise artifacts evaluated between 1 and 5, the average score was 4.12 points and the results were 1.62 for motion artifacts. According to the results of the Wilcoxon test, a statistically significant difference was found between the rate of postoperative correction of the sections with motion artifact and noise artifact.Conclusion: Motion artifact and noise artifact which may occur due to many reasons are frequently encountered in CBCT examinations. In such cases, with the Photoshop program, the resulting artifacts can be reversed and can be evaluated from diagnostic point of view.KEYWORDSCBCT, Artifact, Noise, Photoshop

Objectives: This study aimed to compare the diagnostic accuracy of cone beam CT (CBCT) units with different voxel sizes with the digital intraoral scanning technique in terms of the detection of periodontal defects. Methods and materials: The study material comprised of 12 dry skulls with maxilla and mandible. Artificial defects were created on teeth separately using burs randomly on dry skulls. In total 46 dehiscences, 10 fenestrations, 17 furcations, 12 wall defects and 13 without periodontal defect were used in the study. Each tooth with and without defects was imaged at various vertical angles using each of the following modalities: a Veraviewepocs 3D R100 CBCT device and a 3D Shape TRIOSㄾ Color P13 Shade Intraoral Scanner. Results: The κ values for interobserver agreement between observers ranged between 0.29 and 0.86 for the CBCT 10 × 8 cm field of view (FOV) with 0,160 mm3 voxel size; 0.35 and 1 for the CBCT 8 × 8 cm FOV with 0,125 mm3 voxel size; and 0.30 and 1 of intraoral scans. The κ values for detecting defects on anterior teeth were the least, following premolar and molar teeth both CBCT and intraoral scanning. Conclusions: Smaller voxel sizes and smaller CBCT FOV has the highest sensitivity and diagnostic accuracy for detecting various periodontal defects among the scanner modalities examined. Advances in knowledge: Adequate evaluation of the condition of the alveolar bone and periodontal tissues is important for the diagnosis, treatment, and prognosis of periodontal disease. Limited examination methods, such as palpation, inspection, and periodontal probe examination, may provide insufficient information for the diagnosis of periodontal diseases.