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Dento Maxillo Facial Radiology

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https://www.readbyqxmd.com/read/29106310/comparison-of-microtomography-and-optical-coherence-tomography-on-apical-endodontic-filling-analysis
#1
Fernanda Clotilde Mariz Suassuna, Ana Marly Araújo Maia, Daniela Pita Melo, Antônio Celso Dantas Antonino, Anderson Stevens Leônidas Gomes, Patrícia Meira Bento
OBJECTIVES: To comparein vitro differences in the apical filling regarding working length (WL) change and presence of voids and to validate optical coherence tomography (OCT) in comparison with computerized microtomography (µCT) for the detection of failures in the apical filling. METHODS: Forty-five uniradicular teeth with round canals, divided into groups (n = 15) following the obturation protocols: LC (lateral condensation), TMC (thermomechanical compaction) and SC (single cone)...
November 16, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28845679/micro-ct-and-nano-ct-analysis-of-filling-quality-of-three-different-endodontic-sealers
#2
Yan Huang, Berkan Celikten, Karla de Faria Vasconcelos, Laura Ferreira Pinheiro Nicolielo, Nicholas Lippiatt, Arda Buyuksungur, Reinhilde Jacobs, Kaan Orhan
OBJECTIVES: To investigate voids in different root canal sealers using micro-CT and nano-CT, and to explore the feasibility of using nano-CT for quantitative analysis of sealer filling quality. METHODS: 30 extracted mandibular central incisors were randomly assigned into three groups according to the applied root canal sealers (Total BC Sealer, Sure Seal Root, AH Plus) by the single cone technique. Subsequently, micro-CT and nano-CT were performed to analyse the incidence rate of voids, void fraction, void volume and their distribution in each sample...
November 16, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28959890/determination-of-the-palatal-masticatory-mucosa-thickness-by-dental-mri-a-prospective-study-analysing-age-and-gender-effects
#3
Alexander Heil, Franz Sebastian Schwindling, Constanze Jelinek, Manuel Fischer, Marcel Prager, Eduardo Lazo Gonzalez, Martin Bendszus, Sabine Heiland, Tim Hilgenfeld
OBJECTIVES: The aim of this prospective study was to evaluate age and gender effects on the palatal masticatory mucosa thickness by using non-invasive and non-ionizing MRI. METHODS: 40 periodontally healthy participants of five gender-balanced age groups (20-29, 30-39, 40-49, 50-59 and 60-69 years, respectively) underwent dental MRI at 3 Tesla using a contrast-enhanced, high-resolution 3D-sequence. The palatal masticatory mucosa was measured at 40 standard measurement points by two independent observers...
November 3, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28749700/radiographic-diagnosis-of-root-fractures-a-systematic-review-meta-analyses-and-sources-of-heterogeneity
#4
Fernanda Cristina Sales Salineiro, Solange Kobayashi-Velasco, Mariana Minatel Braga, Marcelo Gusmão Paraiso Cavalcanti
OBJECTIVES: Many studies to evaluate the accuracy of root fracture diagnosis have been conducted. However, there is a scarcity of studies to assess the quality and the sources of heterogeneity in the literature. For this reason, the aim of this study was to conduct systematic reviews and meta-analyses to summarize the available evidence on detection of root fractures by cone beam CT (CBCT) and periapical radiograph (PR) images and the interference of artefact by investigating possible sources of heterogeneity...
November 2, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29091472/evidence-of-genotoxicity-and-cytotoxicity-of-x-rays-in-the-oral-mucosa-epithelium-of-adults-subjected-to-cone-beam-computed-tomography
#5
Juliana Bm da Fonte, Tais M de Andrade, Ricardo Lc Albuquerque-Júnior, Maria de Fátima B de Melo, Wilton M Takeshita
OBJECTIVES: To assess cytological evidence of genotoxicity and cytotoxicity of X-rays in oral exfoliated cells of adults subjected to partial and total CBCT (stitching module) by means of micronuclei frequency, associated with counting of degenerative nuclear alterations (pyknosis, karyolysis, karyorrhexis, buds and broken eggs), besides comparing the partial and total CBCT (stitching module) in search of possible differences in the nature and/or intensity of the effects. METHODS: Twenty-nine adults who were referred to total or partial CBCT were selected...
November 1, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28991500/age-estimation-based-on-pulp-tooth-volume-ratio-measured-on-cone-beam-ct-images
#6
Ayse Gulsahi, Cemal Kivanc Kulah, Batuhan Bakirarar, Orhan Gulen, Kivanc Kamburoglu
OBJECTIVES: After tooth eruption, the size of the pulp cavity decreases with age owing to deposition of secondary dentine. The aim of this study was to investigate the relation between the chronological age and the ratio of pulp volume (PV) to tooth volume (TV) measurements using CBCT images of single rooted teeth. METHODS: Maxillary anterior, canine and mandibular canine/premolar CBCT scans of patients older than 15 years of age were collected from the archives between 2013 and 2015 years...
November 1, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28937285/assessment-of-automatic-segmentation-of-teeth-using-a-watershed-based-method
#7
Antoine Galibourg, Jean Dumoncel, Norbert Telmon, Adèle Calvet, Jérôme Michetti, Delphine Maret
OBJECTIVE: Tooth 3D automatic segmentation (AS) is being actively developed in research and clinical fields. Here, we assess the effect of automatic segmentation using a watershed-based method on the accuracy and reproducibility of 3D reconstructions in volumetric measurements by comparing it with a semi-automatic segmentation(SAS) method that has already been validated. METHODS: The study sample comprised 52 teeth, scanned with micro-CT (41 µm voxel size) and CBCT (76; 200 and 300 µm voxel size)...
November 1, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28871830/comparison-of-panoramic-radiography-and-cone-beam-ct-in-the-assessment-of-juxta-apical-radiolucency
#8
Eduarda Helena Leandro Nascimento, Anne Caroline Costa Oenning, Bernardo Barbosa Freire, Hugo Gaêta-Araujo, Francisco Haiter-Neto, Deborah Queiroz Freitas
OBJECTIVES: To compare the performance of panoramic radiography (PAN) and cone beam CT (CBCT) in the detection of juxta-apical radiolucency (JAR), as well as to investigate, in CBCT images, if there are factors associated with the detection of JAR on PAN. METHODS: Two oral radiologists assessed the presence of JAR in PAN and CBCT images of 175 individuals (308 mandibular third molars). The cortical plates involvement and the JAR size and location were assessed on CBCT to evaluate if these factors were related to JAR detection on PAN...
November 1, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28871814/osseous-changes-in-patients-with-medication-related-osteonecrosis-of-the-jaws
#9
Zeynep Burcin Gönen, Canay Yillmaz Asan, Gökmen Zararsiz, Erdem Kiliç, Alper Alkan
OBJECTIVES: Medication-related osteonecrosis of the jaw (MRONJ) is a severe side effect of antiresorptive agents. The aim of this study was to investigate the osseous changes in patients with MRONJ. METHODS: Cone beam CT (CBCT) images of 25 patients with MRONJ and controls were retrospectively evaluated. Buccal, lingual, apical cortical bone thicknesses; buccal, lingual, apical intracortical and cancellous bone density; diameter of mental foramen and incisive canal, and width of mental foramen were measured...
November 1, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29082773/size-distribution-and-clinico-radiological-signs-of-aggressiveness-in-odontogenic-myxoma-three-dimensional-analysis-and-systematic-review
#10
Martin Kauke, Ali-Farid Safi, Matthias Kreppel, Andrea Grandoch, Hans-Joachim Nickenig, Joachim E Zöller, Timo Dreiseidler
OBJECTIVES: Therapeutic assessment of odontogenic myxoma (OM) is poorly standardized. Unidimensional size criteria have shown to be unreliable in therapeutic decision-making. We evaluate the size distribution of OM and scan for associated clinico-radiological signs of aggressiveness. Additionally, we evaluate three-dimensional size delineation of OM, aiming to improve future therapeutic assessment of this destructive neoplasm. METHODS: Primarily, we reviewed the database "PubMed" for data concerning the size of OMs as radiologically determined...
October 30, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29076751/analyses-of-aerodynamic-characteristics-of-the-oropharynx-applying-cbct-obstructive-sleep-apnea-patients-versus-control-subjects
#11
Hui Chen, Yingguang Li, Johan Hc Reiber, Jan de Lange, Shengxian Tu, Paul van der Stelt, Frank Lobbezoo, Ghizlane Aarab
OBJECTIVES: To determine the most relevant aerodynamic characteristic of the oropharynx related to the collapse of the upper airway in obstructive sleep apnea (OSA) patients; and to determine the correlation between the most relevant aerodynamic characteristic(s) of the oropharynx and anatomical characteristics of the oropharynx in OSA patients. METHODS: 31 mild to moderate OSA patients (mean±SD age = 43.5±9.7 yrs) and 13 control subjects (mean±SD age = 48.5±16...
October 27, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29076750/investigation-of-dental-cone-beam-ct-pixel-data-and-a-modified-method-for-conversion-to-hounsfield-units-hu
#12
Dennise Magill, Natalie Beckmann, Marc A Felice, Thomas Yoo, Minou Luo, Mel Mupparapu
OBJECTIVES: To investigate the relationship in dental Cone-Beam CT (CBCT) between the manufacturer-reported image pixel data and a modified conversion to CT number densities in Hounsfield Units (HU). METHODS: A standardized CT phantom was imaged using typical clinical parameters on CBCT from 3 manufacturers (Carestream 9300®, J Morita 3D Accutomo®, and Planmeca Promax 3D®). Reconstructed axial slices were evaluated using regions of interest to ascertain the mean pixel value in 5 materials in the phantom...
October 27, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28937322/diffusion-tensor-imaging-reveals-morphological-alterations-of-the-lateral-pterygoid-muscle-in-patients-with-mandibular-asymmetry
#13
Enrico Nastro, Lilla Bonanno, Luciano Catalfamo, Michele Runci, Alessia Bramanti, Giuseppe Anastasi, Silvia Marino, Francesco Saverio De Ponte
OBJECTIVES: To evaluate non-invasively the morphological features of both lateral pterygoid muscle (LPM) and masseter muscle by using diffusion tensor Imaging on two patients affected by mandibular asymmetry. METHODS: Two female patients with mandibular excess and asymmetry who underwent Le Fort I osteotomy and bilateral sagittal split osteotomy were recruited for this study. Morphological (T1 weighted) and diffusion weighted images were acquired with a 3T scanner 1 week before (T0) and 1 month after the surgery (T1)...
October 27, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28937280/lingual-tonsillolith-prevalence-and-imaging-characteristics-evaluated-on-2244-pairs-of-panoramic-radiographs-and-ct-images
#14
Akira Takahashi, Chieko Sugawara, Keiko Kudoh, Yoshiko Yamamura, Go Ohe, Tetsuya Tamatani, Youji Miyamoto
OBJECTIVES: Lingual tonsilloliths are not as well-known to radiologists than palatine tonsilloliths, although they might be common in clinical practice. The aim of this investigation was to clarify the prevalence and imaging characteristics of lingual tonsilloliths using panoramic radiographs and CT images. METHODS: This study included 2244 patients without pathology at the base of tongue who had undergone panoramic radiography and CT of the maxillofacial region...
October 27, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28891710/the-use-of-a-thyroid-shield-for-intraoral-anterior-oblique-occlusal-views-a-risk-based-approach
#15
Mark Worrall, Alison Menhinick, Donald J Thomson
OBJECTIVES: To estimate the radiation dose reduction to the thyroid for an anterior oblique occlusal view from the use of a thyroid shield, compare this with the variation in thyroid dose resulting from differences in examination positioning and discuss the additional considerations associated with the use of a thyroid shield before making a recommendation on their routine use for this examination. METHODS: Doses to the oral mucosa, the salivary glands, the thyroid, the extrathoracic airways, the oesophagus and the lungs were directly measured for anterior oblique occlusal X-rays of a Rando phantom with and without a thyroid shield using strips of calibrated XRQA Gafchromic film...
October 27, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28869397/precision-of-cone-beam-ct-to-assess-periodontal-bone-defects-a-systematic-review-and-meta-analysis
#16
Letícia Fernanda Haas, Glaucia Santos Zimmermann, Graziela De Luca Canto, Carlos Flores-Mir, Márcio Corrêa
OBJECTIVES: Evaluate the diagnostic validity of CBCT in measuring periodontal bone defects when compared with the reference standard (in situ measurement). METHODS: Studies in which the main objective was to evaluate the diagnostic validity of CBCT in measuring periodontal bone defects when compared with the reference standard were selected. Four databases were searched. The studies were selected by two independent reviewers. The methodology of selected studies was assessed using the 14-item Quality Assessment Tool for Diagnostic Accuracy Studies...
October 27, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28959898/mandibular-canal-visibility-using-a-plain-volumetric-interpolated-breath-hold-examination-sequence-in-mri
#17
Chutamas Deepho, Hiroshi Watanabe, Junichiro Sakamoto, Tohru Kurabayashi
OBJECTIVES: To evaluate the validity of plain volumetric interpolated breath-hold examinations (VIBEs) for detecting the course of the mandibular canal, and to compare the results with contrast-enhanced (CE) VIBE images. METHODS: From our imaging archives, we collected 28 cases taken with a VIBE sequence both before and after intravenous administration of gadolinium hydrate, and then two observers evaluated neurovascular bundle (NVB) visibility in the VIBE images...
October 20, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28937286/comparing-subjective-and-objective-image-quality-at-two-different-radiation-exposure-ranges-of-the-paranasal-sinus-ct-examinations-using-a-volumetric-320-row-detector-ct-system
#18
Berhan Pirimoglu, Recep Sade, Muhammed Sedat Sakat, Hayri Ogul, Suat Eren, Mecit Kantarci
OBJECTIVES: To evaluate image quality of protocol including 135 kVp, 5 mAs and 80 kVp, 5 mAs in the paranasal sinus CT examinations using single volumetric 320-row multidetector CT technique. METHODS: From September to December 2016, both of our control group including 135 kVp and 5 mAs and our study group including 80 kVp and 5 mAs paranasal CT protocols were simultaneously performed on 40 patients using single volumetric 320-row multidetector CT device. Image quality for bony structures, air-filled structures and soft tissues were independently assessed for each group by three blinded observers using a 3-point grading scale (0 = not diagnostic, 1 = partially diagnostic, 2 = diagnostic)...
October 10, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28845691/four-dimensional-ct-angiography-4d-cta-in-the-evaluation-of-juvenile-nasopharyngeal-angiofibromas-comparison-with-digital-subtraction-angiography-dsa-and-surgical-findings
#19
Zebin Xiao, Yingyan Zheng, Jian Li, Dehua Chen, Fang Liu, Dairong Cao
OBJECTIVES: To explore the value of four-dimensional CT angiography (4D-CTA) in the preoperative evaluation of juvenile nasopharyngeal angiofibromas (JNAs) using 320-row volume CT. METHODS: 4D-CTA and DSA data of 18 patients with histopathologically proven JNAs were retrospectively reviewed. The location, extent, feeding vessels and stage of JNAs were assessed by two radiologists independently and blindly. The agreements between both reviewers and between 4D-CTA and surgical findings for assessing the above indicators were analysed, respectively...
October 10, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28749703/a-new-simple-three-dimensional-method-to-characterize-upper-airway-in-orthognathic-surgery-patient
#20
Gabriele Di Carlo, Sirwan Fernandez Gurani, Else Marie Pinholt, Paolo Maria Cattaneo
OBJECTIVES: To develop and validate a new reproducible 3D upper airway analysis based on skeletal structures not involved in the modification, which occur during orthognathic surgery. METHODS: From retrospective cohort of orthognathic surgically treated patients, pre- and postsurgical CBCT-scans of 10 post-pubertal patients were randomly selected. Two operators identified the landmarks, calculated the airway volumes, cross sections and linear measurements on the 10 scans twice at two different time intervals...
October 9, 2017: Dento Maxillo Facial Radiology
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