Radiopacity of 28 Composite Resins for Teeth Restorations.

Aim: Radiopacity is a fundamental requisite to check marginal adaptation of restorations. Our objective was to assess the radiopacity of 28 brands of light-cured composite resins and compare their radiopacity with that of enamel, dentin, and aluminum of equivalent thickness.

Materials And Methods: Composite resin disks (0.

Perception of professionals in the assessment of coronoid hyperplasia by computed tomography.

Coronoid Hyperplasia (CH) is a non-neoplastic and relatively rare enlargement of the coronoid process that may limit mandibular movement as a consequence of the close association between the hyperplastic coronoid process and the anterior region of the zygomatic bone. Computed tomography (CT) is extremely useful for the observation of this association and plays an important role in diagnosing and planning surgical treatment. Once the CT scan is performed, the data can be viewed in many different arrangements, including multiplanar (MPR) and 3D rendering, although the resolution of the latter may not be as good as that of the former.

Assessment of the mandibular incisive canal by panoramic radiograph and cone-beam computed tomography.

Objectives. The region between mental foramens is considered as a zone of choice for implants. However, complications may arise due to an extension anterior to the mental foramen that forms the mandible incisive canal [MIC].

Digital radiographic evaluation of the midpalatal suture in patients submitted to rapid maxillary expansion.

Aims: To analyze the density of the midpalatal suture by means of digital radiographs three months after retention to evaluate if this period of retention is really sufficient for bone repair.

Materials And Methods: This prospective study consisted of 31 patients (11 girls and 20 boys) in the mixed or permanent dentition stage, treated using a tooth-tissue borne expanders (Haas). Occlusal digital radiographs were taken at three stages: prior to rapid maxillary expansion (Stage I); immediately after desired maxillary expansion (Stage II); and after three months of retention (Stage III).

How should the articular disk position be analyzed?

Purpose: To compare 2 methods used to determine the disk position based on sagittal magnetic resonance images.

Patients And Methods: A cross-sectional study of patients with the signs and symptoms of temporomandibular disorders was conducted. The patients' ages and gender distributions were collected.

Comparison between cone-beam and multislice computed tomography for identification of simulated bone lesions.

There are many studies that compare the accuracy of multislice (MSCT) and cone beam (CBCT) computed tomography for evaluations in the maxillofacial region. However, further studies comparing both acquisition techniques for the evaluation of simulated mandibular bone lesions are needed. The aim of this study was to compare the accuracy of MSCT and CBCT in the diagnosis of simulated mandibular bone lesions by means of cross sectional images and axial/MPR slices.

Influence of dental metallic artifact from multislice CT in the assessment of simulated mandibular lesions.

Objective: This study evaluated the influence of metallic dental artifacts on the accuracy of simulated mandibular lesion detection by using multislice technology.

Material And Methods: Fifteen macerated mandibles were used. Perforations were done simulating bone lesions and the mandibles were subjected to axial 16 rows multislice CT images using 0.

Parameters in panoramic radiography for differentiation of radiolucent lesions.

Objective: The aims of this study were to establish parameters in panoramic radiography for interpretation of unilocular radiolucent lesions, and to compare the accuracy of diagnoses given by examiners before and after using these parameters.

Material And Methods: In Part I, 12 specialists analyzed 24 images and the diagnostic criteria used by each examiner to make correct diagnoses were used to build a list of basic radiographic parameters for each pathology (ameloblastoma, keratocystic odontogenic tumor, dentigerous cyst, and idiopathic bone cavity). In Part II, this list was used by 6 undergraduate students (Un), 8 recently graduated dentists (D), 3 oral pathologists, 3 stomatologists, 3 oral radiologists, and 3 oral surgeons to diagnose the corresponding pathologies in the other set of 24 panoramic radiographs (T2).

Radiographic interpretation of unilocular radiolucent mandibular lesions.

The main goal of this study was to identify the main distinctive radiographic characteristics of different unilocular radiolucent mandibular lesions based on the criteria used by different groups of specialists during the process of radiograph interpretation to arrive at a correct diagnosis. A total of 24 panoramic radiographs were selected exhibiting the following lesions: ameloblastoma, keratocystic odontogenic tumor, dentigerous cyst and simple bone cyst. Six cases of each pathology were analyzed by 3 specialists from 4 related areas (pathologists, stomatologists, radiologists and oral surgeons).

Diagnostic agreement between panoramic radiographs and color Doppler images of carotid atheroma.

The aim of this study was to investigate the agreement between diagnoses of calcified atheroma seen on panoramic radiographs and color Doppler images. Our interest stems from the fact that panoramic images can show the presence of atheroma regardless of the level of obstruction detected by color Doppler images. Panoramic and color Doppler images of 16 patients obtained from the archives of the Health Department of the city of Valença, RJ, Brazil, were analyzed in this study.

Study of the localization of radiopacities similar to calcified carotid atheroma by means of panoramic radiography.

Objective: To determine the location in soft tissues of the calcifications, similar to calcified carotid atheromas, that can be observed radiographically in the cervical region in panoramic radiographs.

Study Design: In each anatomic cadaver specimen preserved in formol, consisting of the head and neck, radiopaque spheres (made from gutta-percha) were positioned in anatomic structures of the cervical region that can be sites of calcification. For each anatomic structure marked in this way, panoramic radiography was performed, consisting of 17 radiographs.

The role of SPECT/CT with 99mTc-MDP image fusion to diagnose temporomandibular dysfunction.

Objective: The objective of this study was the evaluation of Single Photon Emission Computed Tomography with Technetium 99m Methylene Diphosphonate (SPECT with 99mTc-MDP) and computed tomography (CT), simultaneously acquired image in diagnosis of temporomandibular joint (TMJ) dysfunction.

Study Design: A prospective study was conducted with 33 patients, 29 female and 4 male, all of then presenting signs and/or complaints suggestive of temporomandibular dysfunction. SPECT/CT with 99mTc-MDP was performed in all patients and imaging results compared with final diagnosis and clinical outcome.