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Dento Maxillo Facial Radiology

Rubens Spin-Neto, Louise H Matzen, Lars W Schropp, Thomas S Sørensen, Ann Wenzel
OBJECTIVES: To assess the impact of head motion artefacts and an automated artefact-correction system on CBCT image quality and interpretability for simulated diagnostic tasks. METHODS: A partially dentate human skull was mounted on a robot simulating four types of head movement (antero-posterior translation, nodding, lateral rotation, and tremor), at three distances (0.75, 1.5, and 3 mm) based on two movement patterns (skull returning/not returning to the initial position)...
March 14, 2018: Dento Maxillo Facial Radiology
Amanda C Cunha, Lucia Hs Cevidanes, Eduardo F Sant'Anna, Fabio R Guedes, Ronir R Luiz, James A McNamara, Lorenzo Franchi, Antonio Carlos O Ruellas
OBJECTIVES: The aim of this study was to compare the reproducibility of skeletal maturation assessments by raters with similar orthodontic experience using hand-wrist (HW) and cervical vertebral maturation (CVM) methods. METHODS: Hand-wrist and lateral cephalometric radiographs from 15 subjects (8 males and 7 females; ages, 9-16 years) were selected randomly. HW skeletal maturation was evaluated by the method of Greulich and Pyle, and CVM staging was evaluated by the method of Baccetti et al...
March 2, 2018: Dento Maxillo Facial Radiology
Adriana D Cruz, Maria Cn Castro, Marcelo F Aguiar, Ludmilla S Guimarães, Cinthya C Gomes
OBJECTIVES: To assess the radiographic appearances of the endodontic treatment in different room lighting conditions and image display devices. METHODS: After approval by Research Ethical Board, 20 images were obtained from blocks with one endodontically treated tooth. The 20 endodontic treatments were made in the laboratory, of those randomly selected, 10 teeth (50% of sample) received some quality defect in three parameters as apical limit, adaptation to root canal and homogeneity of the root canal filling material...
March 1, 2018: Dento Maxillo Facial Radiology
Nobuo Kashiwagi, Shin-Ichi Nakatsuka, Takamichi Murakami, Eisuke Enoki, Kazuhiro Yamamoto, Katsuyuki Nakanishi, Takaaki Chikugo, Yoshitaka Kurisu, Masatomo Kimura, Tomoko Hyoudou, Akio Tsukabe, Takahide Kakigi, Yasuhiko Tomita, Kazunari Ishi, Yoshifumi Narumi, Yukinobu Yagyu, Noriyuki Tomiyama
OBJECTIVES: To report MR imaging features of mammary analogue secretory carcinoma (MASC) and acinic cell carcinoma (AciCC) of the salivary gland based on the latest version of the World Health Organization (WHO) 2017 classification of head and neck tumours. METHODS: MR images in 4 patients with MASC and 4 with AciCC were reviewed for margin characteristics, the presence of pathological cervical nodes, the presence of a cystic component and interface between cystic and solid component, signal intensity of the cystic components on T1 weighted images, and signal intensity of the solid component on T1 and T2 weighted images...
March 1, 2018: Dento Maxillo Facial Radiology
Priscila Brenner Hilgenberg-Sydney, Danielle Veiga Bonotto, José Stechman-Neto, Liete Figueiredo Zwir, Camila Pachêco-Pereira, Graziela De Luca Canto, André Luís Porporatti
OBJECTIVES: The aim of this systematic review was to answer the focus question: "In subjects with Degenerative Joint Disease (DJD) of the Temporomandibular Joint (TMJ), what is the diagnostic validity of Computed Tomography (CT) or Cone-Beam Computed Tomography (CBCT) compared with clinical protocols"? METHODS: DJD should be assessed through clinical diagnosis according to RDC/TMD or DC/TMD. Search strategies were specifically developed to the following electronic databases: Cochrane, Latin American And Caribbean Health Sciences (LILACS), PubMed (including Medline), Scopus and Web of Science...
February 26, 2018: Dento Maxillo Facial Radiology
Enricomaria Mormina, Francesca Granata, Michele Gaeta, Marcello Longo, Alessandro Calamuneri, Alessandro Arrigo, Francesco De Ponte, Sergio Lucio Vinci, Luciano Catalfamo, Enrico Nastro Siniscalchi
We evaluated, by means of a non-invasive procedure based on Magnetic Resonance Imaging, the masticatory muscular microstructure in a 55 year-old-female patient affected by bruxism. The patient underwent MR examination before and after one month of splint therapy, when she referred the complete disappearance of all symptoms. By means of Diffusion Tensor Imaging we observed changes at microstructural level of masticatory muscular complex. We conclude that DTI may be a useful instrument both to perform panoramic reconstruction of the masticatory muscle complex and to investigate microstructural modifications related to the pain relief in bruxism...
February 22, 2018: Dento Maxillo Facial Radiology
Risa Matsubara, Yoshinobu Yanagi, Kazuhiro Oki, Miki Hisatomi, Karina Cp Santos, Babatunde O Bamgbose, Mariko Fujita, Shunsuke Okada, Shogo Minagi, Junichi Asaumi
OBJECTIVES: To investigate the correlations among various temporomandibular joint (TMJ) findings on MRI and the relationships between MRI findings and symptoms. METHODS: 425 patients (850 TMJs) with temporomandibular joint disorders (TMDs) who underwent MRI were enrolled. Oblique sagittal proton density-weighted and T2 weighted images in open- and closed-mouth positions were evaluated. MRI findings included disc configuration, disc position, condylar morphology, bone marrow pattern, and joint effusion...
February 16, 2018: Dento Maxillo Facial Radiology
Akira Baba, Tazuko K Goto, Hiroya Ojiri, Mutsumi Takagiwa, Chiho Hiraga, Masahiro Okamura, Sho Hasegawa, Yumi Okuyama, Nobuhiro Ogino, Hideomi Yamauchi, Yuko Kobashi, Shinji Yamazoe, Yohei Munetomo, Takuji Mogami, Takeshi Nomura
OBJECTIVES: Antiresorptive agent-related osteonecrosis of the jaw (ARONJ)/medication-related osteonecrosis of the jaw (MRONJ) include both bisphosphonate-related osteonecrosis of jaw (BRONJ) and denosumab-related osteonecrosis of jaw (DRONJ). The purpose of this study is to study radiological characteristics of ARONJ/MRONJ. These imaging features may serve as one useful aid for assessing ARONJ/MRONJ. METHODS: CT scans of 74 Japanese patients, who were clinically diagnosed by inclusion criteria of ARONJ/MRONJ, obtained between April 1, 2011 and September 30, 2016, were evaluated...
February 13, 2018: Dento Maxillo Facial Radiology
Ahmed Abdel Khalek Abdel Razek
PURPOSE: To characterize salivary glands tumors with diffusion tensor imaging. METHODS: This study was conducted upon 53 patients (aged 18-81 years: mean 37 years) with salivary gland tumors that underwent diffusion tensor imaging was obtained using a single-shot echo-planar imaging sequence with parallel imaging at 1.5 tesla scanner. Forty-eight slices were obtained, with a thickness of 2.5 mm, with no gap and the total scan duration was 7-8 min. The fractional anisotropy (FA) and the mean diffusivity (MD) value of the salivary gland tumors was calculated and correlated with pathological findings...
February 7, 2018: Dento Maxillo Facial Radiology
Barbara Kirnbauer, Norbert Jakse, Petra Rugani, Michael Schwaiger, Marton Magyar
OBJECTIVES: Third molars often require surgical removal. Since three-dimensional radiological assessment is often indicated in difficult cases to avoid surgical complications, the radiation burden has to be considered. Here, magnetic resonance imaging (MRI) may offer a dose-free alternative to conventional x-ray techniques. The aim of this retrospective analysis was to evaluate the assessment quality of MRI compared to panoramic radiography in impacted and partially impacted lower third molars...
February 1, 2018: Dento Maxillo Facial Radiology
Yohei Takeshita, Mayumi Shimizu, Gainer R Jasa, Warangkana Weerawanich, Kazutoshi Okamura, Shoko Yoshida, Kenji Tokumori, Junichi Asaumi, Kazunori Yoshiura
OBJECTIVES: To compare the results of a new quantitative image quality evaluation method that requires no observers with the results of receiver operating characteristic (ROC) analysis in detecting the mandibular canal in cone beam CT (CBCT) images. METHODS: A Teflon (polytetrafluoroethylene) plate phantom with holes of different depths was scanned with two CBCT systems. One CBCT system was equipped with an image intensifier (Experiment 1), and the other was equipped with a flat panel detector (Experiment 2)...
January 29, 2018: Dento Maxillo Facial Radiology
Cemre Koç, Gül Sönmez, Funda Yılmaz, Sevilay Karahan, Kıvanç Kamburoğlu
OBJECTIVES: To compare the accuracy of a PSP sensor with CBCT images in the detection of simulated endodontic complications. METHODS: Following simulated endodontic complications were created in 40 extracted human mandibular molar teeth: Group 1) Instrument seperation (N=10); Group 2) Strip perforation (N=10); Group 3) Underfilling of root canals (N=10); Group 4) Overfilling of root canals (N=10). Intraoral and CBCT images (voxel size: 0.075mm, 0.1mm and 0.2mm) were taken...
January 29, 2018: Dento Maxillo Facial Radiology
Angang Ding, Jia Li, Xia Gong, Xiong P, Li Jiang
OBJECTIVES: For lesions in the salivary glands, ultrasonography (US) is an ideal tool for initial assessment. The aim of this study was to characterize and differentiate between the Gray scale and Doppler US findings of intracapsular carcinoma ex pleomorphic adenoma (Ic-CxPA) and invasive carcinoma ex pleomorphic adenoma (Inv-CxPA). METHODS: A total of 87 patients (89 lesions) with histopathologically proven CxPA underwent US examination. The following characteristics were assessed on US images: size, shape, border, echogenicity, echo texture, posterior echo, vascularity, and regional lymph node enlargement...
January 24, 2018: Dento Maxillo Facial Radiology
Nils Kadesjö, Randi Lynds, Mats Nilsson, Xie-Qi Shi
OBJECTIVES: To compare the radiation dose to children examined for impacted canines, using two-dimensional (2D) examinations (panoramic and periapical radiographs) and cone beam CT (CBCT). METHODS: Organ doses were determined using an anthropomorphic 10-year-old child phantom. Two CBCT devices, a ProMax3D and a NewTom5G, were examined using thermoluminescent dosimeters. For the panoramic radiograph, a Promax device was used and for periapical radiographs, a Prostyle device with a ProSensor digital sensor was used...
January 16, 2018: Dento Maxillo Facial Radiology
Paolo Toti, Antonio Barone, Simone Marconcini, Giovanni Battista Menchini-Fabris, Ranieri Martuscelli, Ugo Covani
The aim of the study was to introduce a mathematical method to estimate the correct pose of a blade by evaluating the radiographic features obtained from a single two-dimensional image. Blade-form implant bed preparation was performed using the piezosurgery device, and placement was attained with the use of magnetic mallet. The pose determination of the blade was described by means of three consecutive rotations defined by three angles of orientation (triplet φ, θ and ψ). Retrospective analysis on periapical radiographs was performed...
January 11, 2018: Dento Maxillo Facial Radiology
Dennis Rottke, Lisa Gohlke, Robert Schrödel, Stefan Hassfeld, Dirk Schulze
OBJECTIVES: The present study aims at investigating different radiation protection issues and dose values while acquiring intraoral images with a handheld X-ray device. METHODS: An Aribex NOMAD Pro 2TM, a RANDO® male head phantom, a consistency testing body (CTB), a PTW NOMEX® Multimeter, and a PTW Farmer® Ionization Chamber Type 30010 were used to investigate: (1) dose area products (DAP); (2) the expansion of the control area (CA); (3) the scattering pattern; and (4) the potential risk for operators of the X-ray device...
January 10, 2018: Dento Maxillo Facial Radiology
MarcosAlan Vieira Bittencourt, GrazielaOro Cericato, Ademir Franco, RafaelaSilva Girão, Anderson Paulo Barbosa Lima, LuizRenato Paranhos
OBJECTIVES: This study aimed to search for scientific evidence concerning the accuracy of dental development for estimating the pubertal growth spurt. METHODS: It was conducted according to the statements of PRISMA. An electronic search was performed in six databases, including the grey literature. The PICOS strategy was used to define the eligibility criteria and only observational studies were selected. RESULTS: Out of 1,416 identified citations, 10 articles fulfilled the criteria and were included in this systematic review...
January 10, 2018: Dento Maxillo Facial Radiology
Saulo L Sousa Melo, Emily Lanzel, Nitin A Pagedar, Daniah Alhazmi, Laila Dahmoush, Bruno A Policeni, Marcia S Campos
Mucoepidermoid carcinoma (MEC) is the most common salivary gland malignancy. The submandibular gland is rarely involved, about less than 10% of all other major salivary glands. We report a case of a 49-year-old female who presented with a mass on the left side of the floor of the mouth. She was complaining of neck pain for the last 2-3 days and had noticed the mass growing in size and becoming tender to palpation. There was no exacerbation of pain during eating, drinking, or opening of mouth. A multidetector CT scan was made...
January 10, 2018: Dento Maxillo Facial Radiology
Ralf K W Schulze
No abstract text is available yet for this article.
February 2018: Dento Maxillo Facial Radiology
Alessiana Helena Machado, Karolina Aparecida Castilho Fardim, Camila Furtado de Souza, Bruno Salles Sotto-Maior, Neuza Maria Souza Picorelli Assis, Karina Lopes Devito
OBJECTIVES: To quantitatively compare metal artefacts produced by implants in different maxillomandibular regions on cone beam CT (CBCT) images. METHODS: A total of 200 implants selected from CBCT examinations were divided into four groups: Group 1 (n = 50)-implants located in the anterior maxilla; Group 2 (n = 50)-implants located in the posterior maxilla; Group 3 (n = 50)-implants located in the anterior mandible and Group 4 (n = 50)-implants located in the posterior mandible...
February 2018: Dento Maxillo Facial Radiology
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