Dental maxillary sinus pathology: a CBCT-based case-control study.

This study evaluated the association between dental infection and maxillary sinus pathology, and the influence of age, sex, type of tooth, root proximity to the sinus floor, the condition of the primary maxillary ostium, and the presence of an accessory maxillary ostium in this process. Computed Tomography scans were selected, and upper posterior teeth were evaluated for the presence of apical periodontitis (AP), bone loss with furcation involvement, and endoperiodontal lesion (EPL), subsequently, sinuses were evaluated for mucosal thickening (MT) and opacification of the maxillary sinus (OMS). Logistic regression models were constructed, and Chi-squared and Fisher's tests were applied.

Three-dimensional replica of the temporal bone in the teaching of human anatomy.

Purpose: The current study proposes the comparison of the visualization and identification of anatomical details between natural human temporal bone, its respective copy from three-dimensional printing, and the virtual model obtained from CBCT.

Methods: The sample consisted of undergraduate students in Dentistry (Group UE, n = 22), Postgraduate students in Radiology and Imaging (Group P-RI, n = 20), and Postgraduate students in Forensic Odontology (Group P-FO, n = 24). All participants attended a theoretical class on specialized anatomy of the temporal bone and subsequently performed the markings of 10 determined structures.

Effect of cone-beam computed tomography metal artefact reduction on incomplete subtle vertical root fractures.

Purpose: This study compared the accuracy of detection of incomplete vertical root fractures (VRFs) in filled and unfilled teeth on cone-beam computed tomography images with and without a metal artefact reduction (MAR) algorithm.

Materials And Methods: Forty single-rooted maxillary premolars were selected and, after endodontic instrumentation, were categorized as unfilled teeth without fractures, filled teeth without fractures, unfilled teeth with fractures, or filled teeth with fractures. Each VRF was artificially created and confirmed by operative microscopy.

Students' perspective of the teaching-learning process of oral radiology before and during the COVID-19 pandemic.

The SARS-Cov-2 (COVID-19) pandemic changed the educational structure of dentistry courses and highlighted the importance of online tools. Understanding students' perception regarding these changes is essential to establishing future teaching-learning strategies to accommodate students' needs in higher education. The aim of this study was to assess students' perceptions of the Oral Radiology teachinglearning process before and during the COVID-19 pandemic.

Dosimetric evaluation for temporomandibular joint cone beam computed tomography exams using different field of view.

To optimize the absorbed organ dose in relation to the field of view for temporomandibular joint examinations in four cone beam computed tomography devices.An anthropomorphic adult head and neck phantom, and 192 LiF dosimeters (TLD-100) were used. The dosimeters were placed in the region corresponding to the lens, parotid glands, submandibular glands, and thyroid.

Maturation stages of the sutures in the median palatine evaluated with cone-beam computed tomography.

Introduction: This study aimed to evaluate the influence of age, sex, and facial growth patterns on the maturation stage of midpalatal sutures.

Methods: We selected 90 total skull cone-beam computed tomography scans and divided them into the following 3 groups: brachyfacial (n = 30), mesofacial (n = 30), and dolichofacial (n = 30). These groups were determined using Ricketts VERT 3-dimensional cephalometric analysis.

Effect of image acquisition parameters on the radiopacity of bulk-fill and nanocomposite resins.

Objective: This study evaluated the radiopacity of 2 bulk-fill resins (SonicFill and Filtek Bulk Fill) and a nanocomposite (Filtek Z350 XT) resin compared with enamel, dentin, and aluminum as measured with different exposure parameters.

Study Design: Resin disks were radiographed together with a 1-mm human tooth section and an aluminum stepwedge, at exposure times of 0.2 and 0.

Clinical and radiographic evaluation of high viscosity bulk-fill resin composite restorations.

Purpose: To perform a clinical and radiographic evaluation comparing Filtek Bulk Fill high viscosity bulk-fill resins with Filtek Z350 XT nanoparticulate for 1 year.

Methods: 58 restorations were performed for each material (bulk-fill and nanoparticulate), for a total of 116 restorations. Among these, 42 Class I and 16 Class II restorations were performed for each group, in molars and premolars.

Odontogenic infection as a predisposing factor for pathologic disorder development in maxillary sinus.

Objective: To investigate an association between odontogenic infections (OI) and maxillary sinuses pathologic disorder (MSPD). The distance between the sinus floor and the root apex of upper posterior teeth was also assessed.

Methods: Out of 4,402 cone beam computed tomography scans, 230 were selected, and 431 teeth were evaluated regarding the presence of OI: bone loss with furcation involvement, periapical and endodontic-periodontal lesions.

Accuracy of Panoramic Radiography for Degenerative Changes of the Temporomandibular Joint.

Background: Temporomandibular joint (TMJ) morphologies are complex, and changes in joint components have been studied extensively. TMJ conditions have many different etiologies, appearances, and relevant clinical significance.

Objective: The objective of this study was to evaluate the concordance of the diagnosis of degenerative changes in the TMJ in panoramic radiographs.

CBCT Performance and Endodontic Sealer Influence in the Diagnosis of Vertical Root Fractures.

Aim: To evaluate the performance of three cone beam computed tomography (CBCT) machines in detecting vertical root fractures (VRFs) in teeth filled with different sealers.

Materials And Methods: A total of 80 single-rooted premolars were subjected to instrumentation and restoration with gutta-percha + AH Plus sealer, gutta-percha + sealer 26, gutta-percha + fill canal, and gutta-percha without sealer as the control. Half of the samples were randomly subjected to root fracture and all the teeth were scanned by i-CAT (Imaging Sciences International, Hatfield, USA), PreXion (PreXion Inc.

Effect of Pseudocolor Filter in Micro-computed Tomography Images for Detection of Proximal and Occlusal Caries Lesions in Primary Molars.

Aim: This study aimed to evaluate the effect of pseudocolor filter in micro-computed tomography (CT) images for the detection of proximal and occlusal caries lesions in primary molars.

Materials And Methods: For this in vitro analysis, 26 extracted human primary teeth were scanned using a compact micro-CT device (Skyscan 1172, Bruker micro-CT, Kontich, Belgium) and the projection images were reconstructed into cross-sectional slices (NRecon v.1.

Unusual Case of Graphite Tattoo in a Pediatric Patient: Clinical Presentation and Differential Diagnosis.

Graphite tattoo, a rare finding in children, is characterized by a localized blue-grey macule of variable sizes and shapes. Intraoral graphite implantation may cause this pigmentation through accidental injury with a graphite pencil. The purpose of this paper is to report an unusual case of graphite tattoo involving the anterior palate region in a seven-year-old girl.

Intraobserver and interobserver reproducibility in linear measurements on axial images obtained by cone-beam computed tomography.

Purpose: This study was performed to investigate the intra- and inter-observer variability in linear measurements with axial images obtained by PreXion (PreXion Inc., San Mateo, USA) and i-CAT (Imaging Sciences International, Xoran Technologies Inc., Hatfield, USA) CBCT scanners, with different voxel sizes.

Accuracy assessment of the axial images obtained from cone beam computed tomography.

Objective: The aim of this study was to evaluate accuracy of linear measurements assessed from axial tomograms and the influence of the use of different protocols in two cone beam CT (CBCT) units.

Methods: A cylinder object consisting of Nylon® (Day Brazil, Sao Paulo, Brazil) with radiopaque markers was radiographically examined applying different protocols from NewTom 3G(TM) (Quantitative Radiology s.r.