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Dento Maxillo Facial Radiology

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https://www.readbyqxmd.com/read/30028195/use-of-tungsten-sheet-as-an-alternative-for-reducing-the-radiation-dose-behind-the-digital-imaging-plate-during-intra-oral-radiography
#1
Takehisa Nagasaka, Masahiro Izumi, Kenichi Gotoh, Tsutomu Kuwada, Yoshitaka Kise, Akitoshi Katsumata, Eiichiro Ariji
OBJECTIVES: To verify the use of tungsten sheet as an alternative to lead foil for reducing the radiation dose behind storage phosphor plates (SPPs). METHODS: At six sites (incisor, canine, and molar sites in both the maxilla and mandible) in a head phantom, radiation doses were initially measured behind conventional film packets containing two films and a lead foil. At the same sites, radiation doses were also measured behind packets containing only SPPs. Thereafter, the same dose measurements were performed with shielding materials (lead foil or tungsten sheet) within the packets...
July 20, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/30028190/worth-syndrome-mandibular-osteosclerosis-as-an-incidental-finding-a-report-of-2-cases
#2
Kent S Thompson, Adepitan A Owosho
This report presents two cases of Worth syndrome involving the mandible which were identified as an incidental finding on radiologic evaluation. Both patients were females who presented with enlarged mandibles. Radiologic evaluation revealed multiple bilateral mandibular enostoses, widened and thickened inferior cortical border of the mandible, with no other major clinical finding on examination. One of the patients received orthognathic surgery and healed uneventfully with no post-surgical complications. In this report, we reviewed possible differential diagnoses to this syndrome to facilitate identification among general dentists and oral and maxillofacial radiologists...
July 20, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/30028188/multi-slice-real-time-mri-of-temporomandibular-joint-dynamics
#3
Sebastian Krohn, Arun A Joseph, Dirk Voit, Thomas Michaelis, Klaus-Dietmar Merboldt, Ralf Buergers, Jens Frahm
OBJECTIVES: The purpose of this work was to improve the clinical versatility of high-speed real-time MRI studies of temporomandibular joint (TMJ) dynamics by simultaneous recordings of multiple MRI movies in different sections. METHODS: Real-time MRI at 3 T was realized using highly undersampled radial FLASH acquisitions and image reconstruction by regularized nonlinear inversion (NLINV). Multi-slice real-time MRI of two, three or four slices at 0.75 mm resolution and 6 to 8 mm thickness was accomplished at 50...
July 20, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/30028185/an-systematic-review-of-e-learning-outcomes-in-undergraduate-dental-radiology-curricula-levels-of-learning-and-implications-for-researchers-and-curriculum-planners
#4
Michael G Botelho, Kalpana R Agrawal, Michael M Bornstein
OBJECTIVES: To examine the outcomes of e-learning or blended learning interventions in undergraduate dental radiology curricula and analyze the nature of the knowledge levels addressed in learning interventions. METHODS: A systematic literature review was performed using a search strategy based on MeSH key words specific to the focus question and indexed in the MEDLINE database. The search again was supplemented by hand-searching of selected journals. Data was extracted relating to outcomes of knowledge and student perceptions...
July 20, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/30028183/ambient-dose-during-intraoral-radiography-with-current-techniques-part-1-conversion-factor-for-scattered-radiation-using-a-rectangular-collimator
#5
Reinier C Hoogeveen, Tyrell I de Randamie, Gianni M Soemodihardje, Wer Berkhout
OBJECTIVES: The aim of this study was to establish a conversion factor for assessing the scattered radiation produced during intraoral radiography with a rectangular collimator in areas where the remnant beam is not present. The dose level in the remnant beam will be addressed in another study. METHODS: A radiological phantom (Rando) in the upright position was exposed to radiation delivered by a Planmeca Intra X-ray unit over 9 exposure geometries (right side of a full mouth series)...
July 20, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/30004256/evaluation-of-soft-tissues-simulant-materials-in-cone-beam-computed-tomography
#6
Priscila A Lopes, Gustavo M Santaella, Carlos Augusto S Lima, Karla de Faria Vasconcelos, Francisco C Groppo
OBJECTIVES: To evaluate different materials in simulating soft tissues and to analyze the influence of these materials on the mean (MPIV) and standard deviation (SDPIV) of pixel intensity values comparing them to a gold standard in CBCT images. METHODS: Images of three piglet heads with their soft tissues intact (gold standard) and different simulant materials were acquired: ice, modelling wax, and ballistic gelatin, with the same thickness of the original soft tissues...
July 13, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/30004255/evaluation-of-jawbone-morphology-and-bone-density-indices-in-panoramic-radiographs-of-selective-serotoninre-uptake-inhibitor-users-a-preliminary-study
#7
Bhumija Gupta, Aneesha Acharya, Shilpa Singh, Stefania Brazzoli, Mohamed Ghorab, Shaima Malik, Georgios Pelekos, Paul Emile Rossouw
OBJECTIVES: To assess the influence of Selective Serotonin Reuptake Inhibitor (SSRI) use on jawbone and bone mineral density (BMD) by retrospective analysis of panoramic radiographs. METHODS: Radiographic and clinical records were sourced from the Division of Orthodontics and TMJD, Eastman Institute for Oral Health, University of Rochester. Randomly selected adults (20-65 years) were categorized into: 'Active' (with history of SSRI use of >6 months) and a 'Control' group...
July 13, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/30004241/osteoporosis-detection-in-panoramic-radiographs-using-a-deep-convolutional-neural-network-based-computer-assisted-diagnosis-system-a-preliminary-study
#8
Jae-Seo Lee, Shyam Adhikari, Liu Liu, Ho-Gul Jeong, Hyongsuk Kim, Suk-Ja Yoon
Objectives To evaluate the diagnostic performance of a deep convolutional neural network (DCNN)-based computer-assisted diagnosis (CAD) system in the detection of osteoporosis on panoramic radiographs, through a comparison with diagnoses made by oral and maxillofacial radiologists.  Methods: Oral and maxillofacial radiologists with >10 years of experience reviewed the panoramic radiographs of 1268 females {mean [± standard deviation (SD)] age: 52.5 ± 22.3 years} and made a diagnosis of osteoporosis when cortical erosion of the mandibular inferior cortex was observed...
July 13, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29916728/quantitative-assessment-of-the-flow-distribution-in-the-branches-of-the-external-carotid-by-non-injected-flow-mri
#9
Jérémie Bettoni, Gwénaël Pagé, Anne-Virginie Salsac, Jean-Marc Constans, Sylvie Testelin, Bernard Devauchelle, Olivier Balédent, Stéphanie Dakpé
Owing to the lack of databases of blood flow distributions in the external carotid branches, surgeons currently rely on per-operative imaging and on their experience to choose the recipient vessels for microsurgical facial reconstructions. But, thanks to three-dimensional phase contrast angiography (PCA) and kinematic CINE phase contrast (PC) sequences, MRI technologies have the potential to provide quantitative anatomical and hemodynamic information without injection of contrast agent. Having developed and optimized PC-MRI sequences for the small facial vessels, our objective was to investigate the haemodynamic and blood flow distribution in the external carotid branches...
July 13, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29952657/medication-related-osteonecrosis-of-the-jaw-in-osteoporotic-vs-oncologic-patients-quantifying-radiographic-appearance-and-relationship-to-clinical-findings
#10
Kaycee Walton, Tristan R Grogan, Edwin Eshaghzadeh, Danny Hadaya, David A Elashoff, Tara L Aghaloo, Sotirios Tetradis
OBJECTIVES: To explore whether differences exist in the clinical and radiographic presentation of oncologic vs osteoporotic patients with medication-related osteonecrosis of the jaw (MRONJ). METHODS: We retrospectively assessed panoramic radiographs and CBCT examinations of 70 MRONJ patients receiving antiresorptive medications for the management of either osteoporosis or bone malignancy. Radiographic features of MRONJ were documented and categorized according to severity...
June 28, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29947253/three-dimensional-radiological-evaluation-of-secondary-alveolar-bone-grafting-in-cleft-lip-and-palate-patients-a-systematic-review
#11
Dries De Mulder, Maria Cadenas de Llano-Pérula, Reinhilde Jacobs, Anna Verdonck, Guy Willems
OBJECTIVES: To systematically review the existing literature on the 3D radiological evaluation of secondary alveolar bone grafting (SABG) in cleft lip and palate (CLP) patients, with specific interest in 3D imaging protocols and assessment methods. METHODS: A comprehensive literature search on PubMed, Embase and the Cochrane Library was conducted. Included publications concerned 3D imaging for evaluation of SABG in CLP patients while articles about primary or tertiary bone grafting or using of 2D images only were excluded...
June 27, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29916727/geometric-distortion-of-panoramic-reconstruction-in-third-molar-tilting-assessments-a-comprehensive-evaluation
#12
Saturnino Marco Lupi, Pietro Galinetto, Matteo Cislaghi, Arianna Rodriguez Y Baena, Andrea Scribante, Ruggero Rodriguez Y Baena
OBJECTIVES: To evaluate the geometric distortion of tilting of mandibular third molars with respect to second molars on panoramic reconstruction. METHODS: Cone-beam CT (CBCT) reconstructions of 160 third molars, obtained due to an indication of risk of inferior alveolar nerve damage during surgery, were used. CBCT-reconstructed panoramic images were used as bi-dimensional (2D) images, to avoid distortions other than geometric distortions. The angle between the second and the third molar was measured in 2D and three-dimensional (3D) images...
June 27, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29916726/digital-dental-radiology-in-belgium-a-nationwide-survey
#13
Robin Snel, Ellen Van De Maele, Constantinus Politis, Reinhilde Jacobs
OBJECTIVES: The aim of this study is to analyse the use of digital dental radiology in Belgium, by focussing on the use of extraoral and intraoral radiographic techniques, digitalisation and image communication. METHODS: A nationwide survey has been performed amongst Belgian general dentists and dental specialists. Questionnaires were distributed digitally via mailings lists and manually on multiple refresher courses and congresses throughout the country. The overall response rate was 30%...
June 27, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29916722/influence-of-acquisition-parameters-on-the-magnitude-of-cone-beam-computed-tomography-artifacts
#14
Deborah Queiroz Freitas, Rocharles Cavalcante Fontenele, Eduarda Helena Leandro Nascimento, Taruska Ventorini Vasconcelos, Marcel Noujeim
AIM: To evaluate the influence of kilovoltage (kVp) and metal artifact reduction tool (MAR) on the magnitude of cone beam CT (CBCT) artifacts. METHODS: A titanium and zirconia implants were inserted alternately in a posterior region of a mandible. CBCT exams were acquired with ProMax 3D (Planmeca Oy, Helsinki, Finland) and Picasso Trio machines (Vatech, Hwaseong, South Korea) using 70 kVp, 80 kVp and 90 kVp with and without MAR activation. The other exposure factors remained fixed at 5mA, field of view 80 × 50 mm and voxel 0...
June 27, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29851352/accuracy-of-linear-and-volumetric-measurements-of-artificial-err-cavities-by-using-cbct-images-obtained-at-4-different-voxel-sizes-and-measured-by-using-4-different-software-an-ex-vivo-research
#15
Gül Sönmez, Cemre Koç, Kıvanç Kamburoğlu
OBJECTIVES: To compare the accuracy of linear and volumetric measurements of artificial external root resorption (ERR) cavities by cone beam CT (CBCT) images obtained at four voxel sizes and by using four different software ex vivo. METHODS: ERR cavities were created on 40 extracted single rooted anterior teeth. Images were obtained by using Planmeca CBCT unit at endo mode (0.075 mm); high-resolution mode (0.1 mm); high-definition mode (0.15 mm) and normal resolution mode (0...
June 27, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29851353/comparison-of-the-accuracy-of-full-head-cone-beam-ct-images-obtained-using-a-large-field-of-view-and-stitched-images
#16
Mehmet Ozgur Ozemre, Ayse Gulsahi
OBJECTIVE: The aim of this study was to investigate the accuracy of the new stitching feature of the Morita 3D Accuitomo device by comparing it with the I-CAT device and real measurements. METHODS: Eight dry skulls were used in this study. The full scan mode of an I-CAT device and the new stitching feature of the Morita 3D Accuitomo device were used to obtain full head cone beam CT (CBCT) images, and the linear distances between the selected anatomical sites were measured by two observers...
June 19, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29851369/influence-of-brightness-and-contrast-adjustments-on-the-diagnosis-of-proximal-caries-lesions
#17
Eduarda Hl Nascimento, Hugo Gaêta-Araujo, Karla F Vasconcelos, Bernardo B Freire, Christiano Oliveira-Santos, Francisco Haiter-Neto, Deborah Q Freitas
OBJECTIVES: To assess the influence of brightness and contrast adjustments of digital radiographs on the diagnosis of proximal caries lesions, and to compare with observers' preferences for subjective image quality. METHODS: 80 proximal surfaces of posterior teeth were radiographed using an intraoral digital system (Digora Toto, Soredex, Finland). Initial images and four different combinations of brightness and contrast for each radiography were analysed. Five observers scored the images for the presence and extension of caries lesions...
June 15, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29851354/spatial-agreement-of-demineralized-areas-in-quantitative-light-induced-fluorescence-images-and-digital-photographs
#18
Rosalia Tatano, Benjamin Berkels, Eva E Ehrlich, Thomas M Deserno, Ulrike B Fritz
Previous work has shown qualitatively that detection of demineralized tooth areas (white spot lesions, WSLs) is more reliable in digital photographs (DP) as in quantitative light-induced fluorescence (QLF) images. Based on non-rigid, multimodal image registration, we now quantitatively compare manual and automatic markings in both modalities.  Methods:  After braces removal, pairs of DP and QLF were acquired from 124 teeth of 31 patients. Three experienced raters marked the WSL on both DP and QLF images, each of which was presented twice in randomized order...
June 15, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29791198/updates-on-ultrasound-research-in-implant-dentistry-a-systematic-review-of-potential-clinical-indications
#19
Vaishnavi Bhaskar, Hsun-Liang Chan, Mark MacEachern, Oliver D Kripfgans
OBJECTIVES: Ultrasonography has shown promising diagnostic value in dental implant imaging research; however, exactly how ultrasound was used and at what stage of implant therapy it can be applied has not been systematically evaluated. Therefore, the aim of this review is to investigate potential indications of ultrasound use in the three implant treatment phases, namely planning, intraoperative and post-operative phase. METHODS: Eligible manuscripts were searched in major databases with a combination of keywords related to the use of ultrasound imaging in implant therapy...
June 6, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29745753/does-acoustic-radiation-force-elastography-improve-the-diagnostic-capability-of-ultrasound-in-the-preoperative-characterization-of-masses-of-the-parotid-gland
#20
Pamela Zengel, Florian Notter, Dirk A Clevert
OBJECTIVES: Ultrasound is the method of choice for preoperative evaluation of tumours of the parotid glands. However, existing methods do not allow for clear differentiation between the most common benign tumours and malignant tumours. The aim of our study was to evaluate if acoustic radiation force, Virtual Touch Quantification (VTQ) elastography helps to improve the preoperative evaluation of parotid masses. METHODS: We investigated the parenchyma of 102 parotid glands, 14 lymph nodes of healthy volunteers and 51 tumours of the parotid gland via ultrasound, colour Doppler ultrasound and VTQ...
June 6, 2018: Dento Maxillo Facial Radiology
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