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Dento Maxillo Facial Radiology

Michele Cassetta, Nicola Pranno, Alessandro Stasolla, Nicola Orsogna, Davide Fierro, Costanza Cavallini, Vito Cantisani
OBJECTIVES: To evaluate the effect of orthodontic stainless steel brackets and two different types of archwires on the diagnostic quality of 3-T MR images. METHODS: This prospective, case-control study was conducted following Strengthening the Reporting of Observational Studies in Epidemiology guidelines. The recruitment was conducted among orthodontic patients. 80 subjects, requiring MRI for the presence of temporomandibular disorders, were enrolled and divided into four groups: 20 patients using aligners (control group); 20 patients with stainless steel brackets without archwires; 20 patients with stainless steel brackets and nickel-titanium archwires; and 20 patients with stainless steel brackets and stainless steel archwires...
June 21, 2017: Dento Maxillo Facial Radiology
Cosimo Nardi, Cinzia Talamonti, Stefania Pallotta, Paola Saletti, Linda Calistri, Cesare Cordopatri, Stefano Colagrande
OBJECTIVES: To evaluate the effective dose and image quality of horizontal CBCT in comparison with multislice spiral CT (MSCT) in scans of the head, cervical spine, ear and dental arches. METHODS: A head and neck Alderson-Rando(®) phantom (The Phantom Laboratory, Salem, NY) equipped with 74 thermoluminescence dosemeters was exposed according to 5 different scans in CBCT and 4 different scans in MSCT. Spatial and contrast resolutions, in terms of modulation transfer function and contrast-to-noise ratio (CNR), were measured to obtain a quantitative assessment of image quality...
June 20, 2017: Dento Maxillo Facial Radiology
Eliana D da Costa, José E Corrente, Glaucia M B Ambrosano
No abstract text is available yet for this article.
June 20, 2017: Dento Maxillo Facial Radiology
Kazuhito Yoshida, Motoki Fukuda, Kenichi Gotoh, Eiichiro Ariji
OBJECTIVES: To clarify the depression aspect of the maxillary sinus anterior wall and to investigate its relationship with the panoramic image appearance of a diagonal line from the inferior part of the so-called panoramic innominate line to the medial portion of the orbital floor line. METHODS: Based on CT data, panoramic images were simulated for two typical cases with and without anterior wall depression. Next, on axial CT images of 1689 subjects (3378 sinuses) stored in our image database, the wall depths were measured and analyzed for their relationships with the panoramic appearances of the diagonal line, classified into invisible, obscure and clear patterns...
June 20, 2017: Dento Maxillo Facial Radiology
Shinji Kito, Hirofumi Koga, Masafumi Oda, Tatsurou Tanaka, Ikuya Miyamoto, Masaaki Kodama, Manabu Habu, Shinya Kokuryo, Kenji Osawa, Noriaki Yamamoto, Shinobu Matsumoto-Takeda, Nao Wakasugi-Sato, Noriaki Kawanabe, Daigo Yoshiga, Shun Nishimura, Takaaki Joujima, Ayae Kito-Shingaki, Masataka Uehara, Masaaki Sasaguri, Yasuhiro Morimoto
OBJECTIVES: To elucidate the changes in the distributions of fluorine-18-labelled fluoro-2-deoxy-d-glucose ((18)F-FDG) accumulation in the tongue muscles of patients following four kinds of surgical operations for tongue cancers. METHODS: The changes in the distributions of (18)F-FDG accumulations in the tongue muscles on positron emission tomography (PET)-CT, in association with imaging findings on CT and MRI, were retrospectively analyzed before and after four kinds of surgical operations for 50 patients with tongue cancers...
June 20, 2017: Dento Maxillo Facial Radiology
Iwona Niedzielska, Sebastian Pawelec, Zbigniew Puszczewicz
OBJECTIVES: The paper was aimed at assessing the diagnostic value of a thermographic examination of pathology of the paranasal sinuses. METHODS: 39 patients meeting inclusion criteria for the study. The cases of unilateral inflammations of the maxillary sinuses (odontogenic and non-odontogenic, acute and chronic) were chosen on the basis of a comprehensive panel of diagnostic tests including among other things: a radiological examination, endoscopy, the histopathological assessment of the state of the collected mucous membrane...
June 14, 2017: Dento Maxillo Facial Radiology
Solange Kobayashi-Velasco, Fernanda C S Salineiro, Ivan O Gialain, Marcelo G P Cavalcanti
OBJECTIVE: To compare two small field of view (FOV) cone-beam computed tomography (CBCT) protocols with different voxel sizes, and number of frames for the diagnosis of root and alveolar fractures in macerated canine maxillae. METHODS: Eighty incisor teeth from the canine species were inserted in eighty anterior alveolar sockets of twenty canine maxillae. An operator randomly divided each maxilla site (eighty sites in total) into four equal groups of 20 sites: 1 (sound tooth and non-fractured alveolar socket); 2 (sound tooth and fractured alveolar socket); 3 (fractured root and non-fractured alveolar socket); 4 (fractured root and fractured alveolar socket)...
June 14, 2017: Dento Maxillo Facial Radiology
Hui Chen, Maureen van Eijnatten, Jan Wolff, Jan de Lange, Paul F van der Stelt, Frank Lobbezoo, Ghizlane Aarab
OBJECTIVES: The aim of this study was to assess the reliability and accuracy of three different imaging software packages for three-dimensional analysis of the upper airway using CBCT images. METHODS: To assess the reliability of the software packages, 15 NewTom 5G(®) (QR Systems, Verona, Italy) CBCT data sets were randomly and retrospectively selected. Two observers measured the volume, minimum cross-sectional area and the length of the upper airway using Amira(®) (Visage Imaging Inc...
June 14, 2017: Dento Maxillo Facial Radiology
Ana Paula Reis Durão, Aline Morosolli, Jackie Brown, Reinhilde Jacobs
The aim of this study was to systematically review the existing scientific literature and evidence about (a) the validation of masseter muscle ultrasonography for accurate assessment of muscle thickness and (b) the reproducibility of masseter muscle thickness measures. An electronic literature search was conducted using determined keywords on specific databases. Preliminary search revealed 298 articles listed in Medline, Scopus and Web of Science. 60 duplicates were rejected, leaving 238 articles for review...
June 8, 2017: Dento Maxillo Facial Radiology
Eliete Neves Silva Guerra, Fabiana Tolentino Almeida, Fernanda Vieira Bezerra, Paulo Tadeu de Souza Figueiredo, Maria Alves Garcia Silva, Graziela De Luca Canto, Camila Pachêco-Pereira, André Ferreira Leite
OBJECTIVE: The aim of this study was to systematically review the literature about the capability of CBCT images to identify individuals with low Bone Mineral Density (BMD). As the literature is scarce regarding this topic, the purpose of this systematic review is also to guide future research in this area. METHODS: A detailed search was performed in five databases without restrictions of time or languages. Additionally, a gray literature search was conducted. QUADAS-2 was applied to evaluate the methodological design of selected studies...
May 30, 2017: Dento Maxillo Facial Radiology
Maria-Pavlina Kalla, Theodore L Economopoulos, George K Matsopoulos
OBJECTIVES: Image registration is commonly used in dental applications for aligning imaging data sets, which is particularly useful when assessing the progression or regression of particular pathomorphic conditions. However, due to the nature of the processed data or the data acquisition process itself, rigid body registration may be insufficient to accurately align the processed data sets. In such cases, deformable models are employed. This study presents a comparison of four well-established deformable models for aligning CBCT volumes...
May 24, 2017: Dento Maxillo Facial Radiology
Jamille B Ferreira, Ilana O Christovam, David S Alencar, Andréa F J da Motta, Claudia T Mattos, Adriana Cury-Saramago
OBJECTIVES: The aim of this systematic review with meta-analysis was to assess the accuracy and reproducibility of dental measurements obtained from digital study models generated from CBCT compared with those acquired from plaster models. METHODS: The electronic databases Cochrane Library, Medline (via PubMed), Scopus, VHL, Web of Science, and System for Information on Grey Literature in Europe were screened to identify articles from 1998 until February 2016. The inclusion criteria were: prospective and retrospective clinical trials in humans; validation and/or comparison articles of dental study models obtained from CBCT and plaster models; and articles that used dental linear measurements as an assessment tool...
April 26, 2017: Dento Maxillo Facial Radiology
Xin Liang, Zuyan Zhang, Jianping Gu, Zhihui Wang, Bart Vandenberghe, Reinhilde Jacobs, Jie Yang, Guowu Ma, Haibin Ling, Xuchen Ma
OBJECTIVES: To evaluate the accuracy of CBCT in assessing trabecular structures. METHODS: Two human mandibles were scanned by micro-CT (Skyscan 1173 high-energy spiral scan micro-CT; Skyscan NV, Kontich, Belgium) and CBCT (3D Accuitomo 170; Morita, Japan). The CBCT images were reconstructed with 0.5 and 1 mm thicknesses. The condylar images were selected for registration. A parallel algorithm for histogram computation was introduced to perform the registration...
April 26, 2017: Dento Maxillo Facial Radiology
Abbas Shokri, Amirfarhang Miresmaeili, Nasrin Farhadian, Sepideh Falah-Kooshki, Payam Amini, Najmeh Mollaie
OBJECTIVES: This study aimed to assess the effect of head position on the accuracy of transverse measurements of the maxillofacial region on CBCT and conventional posteroanterior (PA) cephalograms. The second objective of this study was to find skull positions with the greatest and smallest effect on transverse measurements in the maxillofacial region. METHODS: PA cephalograms and CBCT scans were obtained from 10 dry human skulls in 7 positions, namely the central position, 10° and 20° rotations, 10° and 20° tilts and 10° and 20° tips...
April 12, 2017: Dento Maxillo Facial Radiology
Abeer A Almashraqi, Eman A Ahmed, Nashwa S Mohamed, Imad H Barngkgei, Nader A Elsherbini, Esam S Halboub
OBJECTIVES: This in vitro study aimed to assess radiation dose and image quality of different low-dose multidetector CT (MDCT) and CBCT imaging protocols in comparison with the standard MDCT protocol for maxillary sinus imaging. METHODS: Effective dose (E) and image quality of 10 MDCT (changing effective milliampere second starting from 141.3 EmAs to 20 EmAs) and 3 CBCT protocols (changing milliampere second and voxel size) were assessed throughout scanning an anthropomorphic head and neck Alderson Rando phantom...
April 12, 2017: Dento Maxillo Facial Radiology
Sung-Hun Kim, Youn-Kyung Choi, Sang Min Shin, Yong-Seok Choi, Tetsutaro Yamaguchi, Masahiro Takahashi, Koutaro Maki, Soo-Byung Park, Yong-Il Kim
OBJECTIVE: To propose a skeletal maturity assessment method by developing a statistical regression analysis model through the integration of lateral and axial images of cervical vertebrae of cleft lip and palate (CLP) patients obtained through cone beam computed tomography (CBCT). METHODS: Forty-nine patients with CLP (28 females, 21 males; age range, 4-16 years) who had CBCT and hand-wrist radiographic data were selected. With the landmarks' coordinates from lateral and axial images of cervical vertebrae, Procrustes analysis and principal components analysis yielded principal component (PC) scores of each cervical vertebra, with the centroid size as the size factor...
April 6, 2017: Dento Maxillo Facial Radiology
Saeid Safiri, Erfan Ayubi
No abstract text is available yet for this article.
April 4, 2017: Dento Maxillo Facial Radiology
Michele M Vidor, Gabriela S Liedke, Mariana B Vizzotto, Heraldo L D da Silveira, Priscila F da Silveira, Cristiano W Araujo, Heloisa E D da Silveira
OBJECTIVES: To analyze the diagnostic accuracy of conventional and digital radiographic images and the impact of digital filters in evaluating the bone-implant interface. METHODS: Titanium implants were inserted into 74 fresh bovine ribs blocks, 37 fitting tight to the bone walls (simulating the existence of osseointegration) and 37 with a gap of 0.125 mm (simulating a failure in the osseointegration process). Periapical radiographs were taken with conventional film and two phosphor plate systems [VistaScan(®) (Dürr Dental, Bietigheim-Bissingen, Germany) and Express(®) (Instrumentarium, Tuusula, Finland)]...
March 28, 2017: Dento Maxillo Facial Radiology
Arthur H Friedlander, Lindsay L Graves, Shannon G Grabich, Nona Aghazadehsanai, Tina I Chang
OBJECTIVES: Given the enhanced risk of ischaemic stroke resulting from the direct effects of hyperuricaemia on vascular plaque formation seen among older males with gout, we sought to determine the prevalence of calcified carotid artery atheromas (CCAAs) on their panoramic images (PIs). METHODS: Medical record librarians identified all male patients over 45 years, who had a diagnosis of gout and a PI incidentally obtained between 2000 and 2015. The prevalence rate of CCAA on technically appropriate images was determined, as were these patients' atherogenic risk profiles including: age, body mass index, hypertension and dyslipidaemia...
March 28, 2017: Dento Maxillo Facial Radiology
Luciana Munhoz, Arthur R G Cortes, Emiko S Arita
OBJECTIVES: To analyze the influence of Type 2 diabetes on bone mineral density (BMD) and panoramic radiomorphometry in postmenopausal females, comparing with results from non-diabetic postmenopausal females. METHODS: A total of 228 postmenopausal females (mean age: 59.51 ± 11.08 years) were included in this study. Demographics, T scores and Z scores from peripheral dual X-ray absorptiometry (DXA) and mandibular cortical index (MCI) from panoramic radiographs were assessed...
March 28, 2017: Dento Maxillo Facial Radiology
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