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Dento Maxillo Facial Radiology

M M Vidor, G S Liedke, M B Vizzotto, Hld da Silveira, P F da Silveira, C W Araujo, Hed 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 (Vista Scan and Express)...
February 17, 2017: Dento Maxillo Facial Radiology
Cynthia Lara-Capi, Maria Grazia Cagetti, Peter Lingström, Gianfranco Lai, Fabio Cocco, Charlotte Simark-Mattsso, Guglielmo Campus
OBJECTIVES: This paper was aimed to evaluate: a) the agreement between a near-infrared light transillumination device and clinical and radiographic examinations in caries lesion detection and b) the reliability of images captured by the transillumination device. METHODS: Two calibrated examiners evaluated the caries status in premolars and molars on 52 randomly selected subjects using: for the occlusal surfaces the transillumination device comparing it with a clinical examination, and for the approximal surfaces, the transillumination device with a radiographic examination (bitewings radiographs)...
February 13, 2017: Dento Maxillo Facial Radiology
Pan Yang, Shuai Hao, Xu Gong, Gang Li
OBJECTIVES: To evaluate chromosomal damage and cytotoxicity in exfoliated buccal mucosa cells,cells of tongue and epithelial gingival cells from adults following cone beam CT scan, and to compare the sensitivity of the different exfoliated cells to a same dosage of ionizing radiation. METHODS: The study included 46 healthy participants (median age 27 years; age range 23-42 years) who had a cone beam CT scan. Exfoliated mucosa cells were collected immediately before the CBCT scan and 10 days after...
February 10, 2017: Dento Maxillo Facial Radiology
Kenichi Obinata, Shinichi Shirai, Hitoshi Ito, Motoyasu Nakamura, Marco Carrozzo, Iain Macleod, Andrew Carr, Yutaka Yamazaki, Kanchu Tei
OBJECTIVES: The aim of this study was to evaluate image characteristics of bisphosphonate related osteonecrosis of the jaws (BRONJ) and compare these with osteoradionecrosis (ORN). METHODS: Thirty-four patients with BRONJ and 16 patients with ORN were included in this study. We investigated the computed tomography (CT) and Dental Panoramic Radiograph (DPR) images for osteolysis, osteosclerosis, sequesteration, periosteal reaction, pathological fracture, and spread of soft tissue inflammation around the jaws...
February 10, 2017: Dento Maxillo Facial Radiology
Arthur H Friedlander, Lindsay L Graves, Shannon C Grabich, Nona Aghazadeh-Sanai, Tina I Chang
OBJECTIVES: Given the enhanced risk of ischemic stroke resulting from the direct effects of hyperuricemia on vascular plaque formation seen among older males with gout we sought to determine the prevalence of calcified carotid artery atheromas (CCAA) on their panoramic images. METHODS: Medical records librarians identified all male patients over age 45 who had a diagnosis of gout and a panoramic image incidentally obtained between 2000-2015. The prevalence rate of CCAA on technically appropriate images was determined as were these patients' atherogenic risk profiles including: age, BMI, hypertension, dyslipidemia...
February 10, 2017: Dento Maxillo Facial Radiology
Luciana Munhoz, Arthur Rodriguez Gonzalez Cortes, Emiko Saito Arita
OBJECTIVE: To analyse the influence of type 2 diabetes on bone mineral density and panoramic radiomorphometry in postmenopausal women, comparing with results from non-diabetics postmenopausal women. METHODS: A total of 228 postmenopausal women (mean age: 59.51 ± 11.08 years) were included in this study. Demographics, T- and Z- scores from peripheral dual x-ray absorptiometry (DXA) and mandibular cortical index (MCI) from panoramic radiographs were assessed. Mean comparison between results for diabetics and non-diabetic was carried out with the student T test...
February 10, 2017: Dento Maxillo Facial Radiology
Wei-Chan Lin, Hsueh-Han Wang, Wen-Lin Hsu, Bi-Hui Cao, De-Ji Chen, Chia-Jung Tsai
OBJECTIVES: To propose an imaging protocol that provides satisfactory image quality for oral examination while minimizing radiation dosage using 320-slice multidetector computed tomography (320-MDCT). METHODS: An anthropomorphic head phantom was scanned using 320-MDCT with protocols combining different scanning modes: volume scanning (whole or local) vs. helical scanning (80- or 64-slice detectors); tube-voltage settings (80, 120 and 135 kVp); and tube-current settings (60, 80, 100 and 120 mA)...
January 27, 2017: Dento Maxillo Facial Radiology
Aditya Tadinada, Sydney Schneider, Sumit Yadav
OBJECTIVE: Reliable three-dimensional localization of the inferior alveolar nerve canal (IANC) is valuable for a variety of dento-alveolar procedures. While conventional CBCT offers 3D information at a reasonably low dose, it is still a significant amount of radiation. In this ex-vivo study, we evaluated the ability of a 180° rotational CBCT acquisition protocol with lower number of basis projections to create a CBCT dataset for reliable localization of the IANC compared to a conventional 360° rotational CBCT acquisition...
January 27, 2017: Dento Maxillo Facial Radiology
Karen A Eley, Stephen R Watt-Smith, Stephen J Golding
OBJECTIVES: Three-dimensionally printed anatomical models are rapidly becoming an integral part of pre-operative planning of complex surgical cases. We have previously reported the "Black Bone" MRI technique as a non-ionising alternative to CT. Segmentation of bone becomes possible by minimising soft tissue contrast to enhance the bone-soft tissue boundary. The objectives of this study were to ascertain the potential of utilising this technique to produce 3D printed models. METHODS: "Black Bone" MRI acquired from adult volunteers and infants with craniosynostosis were 3D rendered and 3D printed...
January 27, 2017: Dento Maxillo Facial Radiology
Gainer R Jasa, Mayumi Shimizu, Kazutoshi Okamura, Kenji Tokumori, Yohei Takeshita, Warangkana Weerawanich, Kazunori Yoshiura
: Objectives The purpose of this study was to clarify the effects of exposure parameters and image processing methods when using cone beam CT (CBCT) to detect clear and unclear mandibular canals (MCs). Methods Twenty-four dry half mandibles were divided into two groups with clear and unclear MCs based on a previous CBCT study. Mandibles were scanned using a CBCT system with varying exposure parameters (tube voltages 60, 70, and 90 kV; and tube currents 2, 5, 10 and 15 mA) to obtain a total of 144 scans...
January 26, 2017: Dento Maxillo Facial Radiology
Eliana Dantas da Costa, Camila Pinelli, Elaine Pereira da Silva Tagliaferro, José Eduardo Corrente, Glaucia Maria Bovi Ambrosano
OBJECTIVE: To create and validate a questionnaire to evaluate infection control in oral radiology. METHODS: The questionnaire was developed after review of the literature, which included published papers and the biosafety protocols available from health care agencies. The initial version of the questionnaire was composed of 14 multiple choice questions and was divided into 3 domains on handwashing, disinfection/protection of surfaces, and disinfectant used. Content validity was assessed by two expert committees, which reviewed the content and scope of the questionnaire and the relevance of each item, respectively...
January 23, 2017: Dento Maxillo Facial Radiology
Thekla K Papakosta, Antonis D Savva, Theodore L Economopoulos, George K Matsopoulos, H-G Gröhndal
OBJECTIVE: Panoramic images of the jaws are extensively used for dental examinations and/or surgical planning because they provide a general overview of the patient's maxillary and mandibular regions. Panoramic images are two-dimensional (2D) projections of three-dimensional (3D) objects. Therefore, it should be possible to reconstruct them from 3D radiographic representations of the jaws, produced by Cone Beam Computed Tomography (CBCT) scanning, obviating the need for additional exposure to X-rays, should there be a need of panoramic views...
January 23, 2017: Dento Maxillo Facial Radiology
Arsany Hakim, Johannes Slotboom, Oliver Lieger, Fabian Schlittler, Roland Giger, Chantal Michel, Roland Wiest, Franca Wagner
OBJECTIVES: Metal artefacts present challenges to both radiologists and clinicians during post-operative imaging. Such artefacts reduce the diagnostic effectiveness of computed tomography (CT) scans and mask findings that could be vital for patient management. Thus, a powerful artefact reduction tool is necessary when imaging patients with metal implants. Our aim was to test the recently introduced iterative metal artefact reduction (iMAR) algorithm in patients with maxillofacial implants...
January 23, 2017: Dento Maxillo Facial Radiology
Valesca Sander Koth, Maria Antonia Figueiredo, Fernanda Gonçalves Salum, Karen Cherubini
OBJECTIVE: To analyze clinical, radiographic and hematological aspects of patients under bisphosphonate therapy. METHODS: A retrospective study was conducted where the records of patients taking bisphosphonates were analyzed considering the occurrence of bisphosphonate-related osteonecrosis of the jaw (BRONJ). Evaluation included panoramic and periapical radiographies, hematological exams and clinical features. Radiographies were analyzed determining the presence or absence of bone sclerosis, osteolysis, persisting alveolar socket, narrowing of the mandibular canal, widening of the periodontal ligament space, periradicular radiolucency, sequestrum, and thickening of the lamina dura...
January 20, 2017: Dento Maxillo Facial Radiology
Hiroshi Watanabe, Ami Kuribayashi, Yasunori Sumi, Tohru Kurabayashi
OBJECTIVES: The purpose of this study was to clarify resolution characteristics of optical coherence tomography (OCT) for dental use. METHODS: Two types of swept-source OCT machines (SS-OCTs) were employed in this study. To clarify their resolution characteristics, we newly developed a glass chart device with a ladder pattern of wavelengths, which ranged from (4 x 2) µm to (1024 x 2) µm, as well as a star-target pattern, a grid pattern, and a spatial frequency response pattern...
January 6, 2017: Dento Maxillo Facial Radiology
Gerlig Widmann, Alexander Bischel, Andreas Stratis, Hilde Bosmans, Reinhilde Jacobs, Eva-Maria Gassner, Wolfgang Puelacher, Ruben Pauwels
OBJECTIVE: The objective of this study was to determine how iterative reconstruction technology (IRT) influences contrast and spatial resolution in ultralow dose dentomaxillofacial computed tomography (CT) imaging. METHODS: A polymethyl methacrylate phantom with various inserts was scanned using a reference protocol at CTDIvol 36.56 mGy, a sinus protocol at 18.28 mGy, and ultralow dose protocols at 4.17, 2.36, 0.99, and 0.53 mGy. All datasets were reconstructed using filtered back projection (FBP) and the following IRTs: adaptive statistical iterative reconstructions (ASIR-50, ASIR-100), and model-based iterative reconstruction (MBIR)...
January 6, 2017: Dento Maxillo Facial Radiology
Chutamas Deepho, Hiroshi Watanabe, Shinya Kotaki, Junichiro Sakamoto, Yasunori Sumi, Tohru Kurabayashi
OBJECTIVES: The purpose of this study is to investigate whether computed tomography/magnetic resonance imaging (CT/MRI) fusion volumetric images can improve the detectability of the mandibular canal (MC) compared to CT alone. METHODS: Images of 31 lesions within or close to the mandible using both multi-slice CT (MSCT) and MRI were gathered from our imaging archives. All lesions underwent MSCT and three dimensional volumetric interpolated breath-hold examination (3D-VIBE) MRI...
January 3, 2017: Dento Maxillo Facial Radiology
Marcus Vinicius Linhares de Oliveira, Ann Wenzel, Paulo Sergio Flores Campos, Rubens Spin-Neto
OBJECTIVE: To undertake a systematic review on quality assurance phantoms for CBCT imaging, including studies on development and application of the phantoms. METHODS: The MEDLINE (PubMed) bibliographic database was searched until May 2016 for studies evaluating the development and use of phantoms in CBCT image quality assurance. The search strategy was restricted to English-language publications using the following combined terms: (Cone Beam CT) OR (Cone Beam Computed Tomography) OR (Cone-Beam Computed Tomography) OR (CBCT) AND (quality OR phantom)...
January 3, 2017: Dento Maxillo Facial Radiology
Gvetadze R Shalva, P Xiong, Mingming Lv, J Li, J Hu, Konstantin Ilkaev, Xin Yang, Jian Sun
OBJECTIVES: To assess the usefulness of contrast-enhanced ultrasound with peritumoral injection of microbubble contrast agent for detecting the sentinel lymph nodes for oral tongue carcinoma. METHODS: Preliminary study, case series. The study was carried out on 12 patients withT1-2cN0 oral tongue cancer. A radical resection of the primary disease was planned, a modified radical supraomohyoid neck dissection was reserved for patients owing larger lesions (T2, n=8)...
January 3, 2017: Dento Maxillo Facial Radiology
Yohei Takeshita, Mayumi Shimizu, Kazutoshi Okamura, Shoko Yoshida, Warangkana Weerawanich, Kenji Tokumori, Gainer Jasa, Kazunori Yoshiura
OBJECTIVES: To develop an observer-free method for quantitatively evaluating the image quality of CBCT images by applying just-noticeable difference (JND). METHODS: We used two test objects: (1) a Teflon (polytetrafluoroethylene) plate phantom attached to a dry human mandible; and (2) a block phantom consisting of a Teflon step phantom and an aluminum step phantom. These phantoms had holes with different depths. They were immersed in water and scanned with a CB MercuRay at tube voltages of 120, 100, 80, and 60 kV...
January 3, 2017: Dento Maxillo Facial Radiology
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