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https://www.readbyqxmd.com/read/28528479/accuracy-of-a-new-intraoperative-cone-beam-ct-imaging-technique-artis-zeego-ii-compared-to-postoperative-ct-scan-for-assessment-of-pedicle-screws-placement-and-breaches-detection
#1
Virginie Cordemans, Ludovic Kaminski, Xavier Banse, Bernard G Francq, Olivier Cartiaux
PURPOSE: The goal of this study was to compare the accuracy of a novel intraoperative cone beam computed tomography (CBCT) imaging technique with that of conventional computed tomography (CT) scans for assessment of pedicle screw placement and breach detection. METHODS: Three hundred and forty-eight pedicle screws were inserted in 58 patients between October 2013 and March 2016. All patients had an intraoperative CBCT scan and a conventional CT scan to verify the placement of the screws...
May 20, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28527967/feasibility-and-safety-of-the-transbronchial-access-tool-for-peripheral-pulmonary-nodule-and-mass
#2
Mark R Bowling, Craig Brown, Carlos J Anciano
BACKGROUND: Navigational bronchoscopy and other imaging modalities have improved the ability to evaluate pulmonary nodules/mass. Many of these lesions are located outside the bronchial airway and are difficult to access even with these devices. The Transbronchial Access Tool (Medtronic, Minneapolis, MN) allows the bronchoscopist to create a pathway from the bronchial airway, across the lung parenchyma, and into the target lesion. We are reporting the feasibility and safety of this new device...
May 17, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28527853/influence-of-intracanal-materials-in-vertical-root-fracture-pathway-detection-with-cone-beam-computed-tomography
#3
Kamile Leonardi Dutra, Camila Pachêco-Pereira, Eduardo Antunes Bortoluzzi, Carlos Flores-Mir, Manuel O Lagravère, Márcio Corrêa
INTRODUCTION: Investigating the vertical root fracture (VRF) pathway under different clinical scenarios may help to diagnose this condition properly. We aimed to determine the capability and intrareliability of VRF pathway detection through cone-beam computed tomographic (CBCT) imaging as well as analyze the influence of different intracanal and crown materials. METHODS: VRFs were mechanically induced in 30 teeth, and 4 clinical situations were reproduced in vitro: no filling, gutta-percha, post, and metal crown...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527848/combined-therapy-for-a-rare-case-of-type-iii-dens-invaginatus-in-a-mandibular-central-incisor-with-a-periapical-lesion-a-case-report
#4
Ping Zhang, Xin Wei
Type III dens invaginatus has a complex root canal structure that poses a greater challenge when endodontic treatment is necessary. Type III dens invaginatus rarely affects mandibular central incisors. In this case, we reported a combined therapy of type III dens invaginatus in a mandibular central incisor with a periapical lesion. Cone-beam computed tomographic (CBCT) imaging was used in the diagnosis and management of the unusual anatomy of dens invaginatus. First, the hard tissue of the dens invaginatus was removed using a dental operating microscope...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527842/diagnostic-accuracy-of-periapical-radiography-and-cone-beam-computed-tomography-in-identifying-root-canal-configuration-of-human-premolars
#5
Thiago Oliveira Sousa, Francisco Haiter-Neto, Eduarda Helena Leandro Nascimento, Leonardo Vieira Peroni, Deborah Queiroz Freitas, Bassam Hassan
INTRODUCTION: The aim of this study was to assess the diagnostic accuracy of periapical radiography (PR) and cone-beam computed tomographic (CBCT) imaging in the detection of the root canal configuration (RCC) of human premolars. METHODS: PR and CBCT imaging of 114 extracted human premolars were evaluated by 2 oral radiologists. RCC was recorded according to Vertucci's classification. Micro-computed tomographic imaging served as the gold standard to determine RCC...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527841/a-comparison-of-2-and-3-dimensional-healing-assessment-after-endodontic-surgery-using-cone-beam-computed-tomographic-volumes-or-periapical-radiographs
#6
Tom Schloss, David Sonntag, Meetu R Kohli, Frank C Setzer
INTRODUCTION: The aim of this study was to compare the assessment of healing after endodontic microsurgery using 2-dimensional (2D) periapical films versus 3-dimensional (3D) cone-beam computed tomographic (CBCT) imaging. METHODS: The healing of 51 teeth from 44 patients was evaluated using Molven's criteria (2D) and modified PENN 3D criteria. The absolute area (2D) and volume (3D) changes of apical lesions preoperatively and at follow-up were calculated by segmentation using OsiriX software (Pixmeo, Bernex, Switzerland) and ITK-Snap (free software)...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527840/prevalence-of-middle-mesial-canals-and-isthmi-in-the-mesial-root-of-mandibular-molars-an-in%C3%A2-vivo-cone-beam-computed-tomographic-study
#7
Mehrnaz Tahmasbi, Poorya Jalali, Madhu K Nair, Sevin Barghan, Umadevi P Nair
INTRODUCTION: Many studies have investigated the morphology of the mandibular molar, but the prevalence of the middle mesial (MM) canal in the mesial root of the mandibular molar is still the subject of controversy. In addition, in previous literature, a true MM canal has not been clearly distinguished from an isthmus between the mesiobuccal and mesiolingual canals. Therefore, the objectives of this study were 2-fold: METHODS: Ninety limited field of view cone-beam computed tomographic scans were observed...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527036/osteogenesis-ability-of-cad-cam-porous-zirconia-scaffolds-enriched-with-nano-hydroxyapatite-particles
#8
Moustafa N Aboushelib, Rehab Shawky
BACKGROUND: The aim of this study was to evaluate osteogenesis ability of CAD/CAM porous zirconia scaffolds enriched with hydroxy apatite used to augment large boney defects in a dog model. METHODS: Surgical defects were made bilaterally on the lower jaw of 12 Beagle dogs. Cone beam CT images were used to create three dimensional images of the healed defects. Porous zirconia scaffolds were fabricated by milling custom made CAD/CAM blocks into the desired shape. After sintering, the pores of half of the scaffolds were filled with a nano-hydroxy apatite (HA) powder while the other half served as control...
December 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28526831/selection-of-a-horizontal-reference-plane-in-3d-evaluation-identifying-facial-asymmetry-and-occlusal-cant-in-orthognathic-surgery-planning
#9
Daniel Lonic, Ali Sundoro, Hsiu-Hsia Lin, Pei-Ju Lin, Lun-Jou Lo
Facial asymmetry and dental occlusal cant have been detected in two-dimensional cephalometry using different horizontal reference lines, but equivalent 3-dimensional (3D) reference planes have not been thoroughly investigated. In this study, 3D cone-beam computed tomography scans of 83 consecutive patients were evaluated using a standardized 3D frame and three horizontal reference planes, Supraorbitale (Sor), Frontozygomatic (Z), and Frankfurt horizontal (FH) for cant detection. Canting was defined as a vertical difference between left and right sides of 2 mm or more, and in at least two investigated planes...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526551/assessment-of-vertical-ridge-augmentation-in-anterior-aesthetic-zone-using-onlay-xenografts-with-titanium-mesh-versus-the-inlay-bone-grafting-technique-a-randomized-clinical-trial
#10
M Mounir, S Mounir, A A Elfetouh, M A Shaker
The aim of this study was to evaluate the final vertical gain at the deficient anterior maxillary alveolar ridges using onlay bone grafts with titanium mesh versus inlay bone grafting. This was a single institutional randomized comparative clinical trial. The study population included 16 patients, with edentulous anterior maxillary alveolar ridges (40 implant sites) who were presented and treated at the Faculty of Oral and Dental Medicine in Cairo University from September 2013 to August 2015. Selected patients were randomly divided into two equal groups...
May 16, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28525668/comparison-of-hand-and-semiautomatic-tracing-methods-for-creating-maxillofacial-artificial-organs-using-sequences-of-computed-tomography-ct-and-cone-beam-computed-tomography-cbct-images
#11
Bence T Szabo, Seçil Aksoy, Gabor Repassy, Krisztian Csomo, Csaba Dobo-Nagy, Kaan Orhan
INTRODUCTION: The aim of this study was to compare the paranasal sinus volumes obtained by manual and semiautomatic imaging software programs using both CT and CBCT imaging. METHODS: 121 computed tomography (CT) and 119 cone beam computed tomography (CBCT) examinations were selected from the databases of the authors' institutes. The Digital Imaging and Communications in Medicine (DICOM) images were imported into 3-dimensonal imaging software, in which hand mode and semiautomatic tracing methods were used to measure the volumes of both maxillary sinuses and the sphenoid sinus...
May 17, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28521967/does-pterygomaxillary-disjunction-in-surgically-assisted-rapid-maxillary-expansion-influence-upper-airway-volume-a-prospective-study-using-dolphin-imaging-3d
#12
J Rômulo de Medeiros, M Ferraro Bezerra, F W Gurgel Costa, T Pinheiro Bezerra, C R de Araújo Alencar, E C Studart Soares
Surgically assisted rapid maxillary expansion has been used for the treatment of transverse maxillary deficiency. This prospective study aimed to evaluate the effect of this surgery (with or without pterygomaxillary disjunction) on the upper airway volume. The patients were randomly divided into two groups: without pterygomaxillary disjunction (-PD) and with pterygomaxillary disjunction (+PD). Eleven patients per group were estimated to obtain a representative sample (90% of power and 95% of confidence level)...
May 15, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28518183/preclinical-evaluation-of-a-crown-splinted-custom-root-shaped-implant
#13
Elias D Kontogiorgos, Poorva Gharpure, Eberechukwu O Iheanacho, Christopher J Gonzales, Lynne A Opperman
OBJECTIVE: To test whether a Maryland bridge-type splint provides adequate stability for a custom root-shaped implant to osseointegrate in a manner substantially equivalent to that of a threaded implant. METHODS: Six beagle dogs were subjected to intraoral impressions and cone beam scans that were used to fabricate custom root-shaped implants (RTIs) and crowns. Premolars in the mandible (P4) and in the maxilla (P3) were extracted, and 24 RTIs were immediately placed in extraction sockets...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518181/a-semi-automatic-algorithm-for-preliminary-assessment-of-labial-gingiva-and-alveolar-bone-thickness-of-maxillary-anterior-teeth
#14
Sheng-Hung Chen, Hsun-Liang Chan, Yongning Lu, Sim-Heng Ong, Hom-Lay Wang, Eng Hong Ko, Po-Chun Chang
PURPOSE: Soft and hard tissue volumes are critical for implant placement and long-term stability. Although the literature has adequately addressed tissue biotypes of Western populations, pertinent information about Asian populations is limited. This study aimed to evaluate the soft and hard tissue profiles of the maxillary anterior teeth of the Taiwanese population using a semi-automatic algorithm. MATERIALS AND METHODS: Cone beam computed tomography images of 11 adults with well-aligned maxillary anterior teeth were overlaid with those of cast models, based on the tooth crowns manually outlined by two independent observers...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28516980/modern-management-of-paediatric-obstructive-salivary-disorders-long-term-clinical-experience
#15
P Capaccio, P Canzi, M Gaffuri, A Occhini, M Benazzo, F Ottaviani, L Pignataro
Recent technological improvements in head and neck field have changed diagnostic and therapeutic strategies for salivary disorders. Diagnosis is now based on colour Doppler ultrasonography (US), magnetic resonance (MR) sialography and cone beam 3D computed tomography (CT), and extra- and intracorporeal lithotripsy, interventional sialendscopy and sialendoscopy-assisted surgery are used as minimally invasive, conservative procedures for functional preservation of the affected gland. We evaluated the results of our long-term experience in the management of paediatric obstructive salivary disorders...
April 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/28516271/three-dimensional-image-fusion-guidance-for-transjugular-intrahepatic-portosystemic-shunt-placement
#16
Vania Tacher, Arthur Petit, Haytham Derbel, Luigi Novelli, Manuel Vitellius, Fourat Ridouani, Alain Luciani, Alain Rahmouni, Christophe Duvoux, Chady Salloum, Mélanie Chiaradia, Hicham Kobeiter
INTRODUCTION: To assess the safety, feasibility and effectiveness of image fusion guidance with pre-procedural portal phase computed tomography with intraprocedural fluoroscopy for transjugular intrahepatic portosystemic shunt (TIPS) placement. MATERIALS AND METHODS: All consecutive cirrhotic patients presenting at our interventional unit for TIPS creation from January 2015 to January 2016 were prospectively enrolled. Procedures were performed under general anesthesia in an interventional suite equipped with flat panel detector, cone-beam computed tomography (CBCT) and image fusion technique...
May 17, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28515675/utility-of-intraoral-stents-in-external-beam-radiotherapy-for-head-and-neck-cancer
#17
Hiroshi Doi, Masao Tanooka, Toshihisa Ishida, Kuniyasu Moridera, Kenji Ichimiya, Kazuo Tarutani, Kazuhiro Kitajima, Masayuki Fujiwara, Hiromitsu Kishimoto, Norihiko Kamikonya
AIM: This study aimed to assess the utility and stability of intraoral stent during intensity-modulated radiation therapy (IMRT). BACKGROUND: The benefits of intraoral stents in radiotherapy are unclear. MATERIALS AND METHODS: We analyzed 386 setup errors in 12 patients who received IMRT for head and neck cancers without intraoral stents (intraoral stent [-]) and 183 setup errors in 6 patients who received IMRT with intraoral stents (intraoral stent [+])...
July 2017: Reports of Practical Oncology and Radiotherapy
https://www.readbyqxmd.com/read/28514364/-radiodiagnostics-of-odontogenic-maxillary-sinusitis
#18
N S Serova, E V Evseeva
The objective of the present study was to analyze the potential of such techniques as X-ray, multi-slice computed tomography (MSCT), and cone-beam computed tomography (CBCT) for diagnostics of odontogenic maxillary sinusitis. The secondary objective was to describe changes in maxillary sinuses identifiable with the help of the above methods. The study included 166 patients at the age varying from 21 to 81 years presenting with odontogenic maxillary sinusitis. All of them underwent the roentgenological examination...
2017: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/28514342/-evaluation-of-main-and-additional-root-canal-curvature-in-maxillary-molars
#19
O A Levenets, V V Alyamovskiy, A A Levenets, S A Ovchinnikova
The aim of the study was to investigate the degree of the main and additional root canal curvatures of the maxillary molars in Krasnoyarsk population. Main and additional root canal curvature was measured in 48 maxillary first molars (M1) and 122 second molars (M2) with cone beam computer tomography. In total 476 measurements were taken for M1 and 1038 for M2 (all measurements were doubled in sagittal and coronal views). M2 showed more variety of root canal morphology and significantly higher proportion of additional root canals...
2017: Stomatologii︠a︡
https://www.readbyqxmd.com/read/28513847/transmission-characteristics-of-a-two-dimensional-antiscatter-grid-prototype-for-cbct
#20
Cem Altunbas, Brian Kavanagh, Timur Alexeev, Moyed Miften
AIM: High fraction of scattered radiation in cone-beam CT (CBCT) imaging degrades CT number accuracy and visualization of low contrast objects. To suppress scatter in CBCT projections, we developed a focused, two-dimensional antiscatter grid (2DASG) prototype. In this work, we report on the primary and scatter transmission characteristics of the 2DASG prototype aimed for linac mounted, offset detector geometry CBCT systems in radiation therapy, and compared its performance to a conventional one-dimensional ASG (1DASG)...
May 17, 2017: Medical Physics
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