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Cone beam computed tomography

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https://www.readbyqxmd.com/read/28637237/long-term-evolutionary-change-in-the-lumen-of-intracranial-atherosclerotic-stenosis-following-angioplasty-and-stenting
#1
Simon C H Yu, Tiffany W W Lau, Simon S M Wong, Kwok T Lee, Lawrence K S Wong, Thomas W H Leung
BACKGROUND: Angioplasty and stenting is a recognized treatment option for patients with intracranial atherosclerosis. OBJECTIVE: To evaluate the long-term evolutionary luminal changes of intracranial atherosclerosis after angioplasty and stenting. METHODS: This was a retrospective study with patient consent. Eighty-two patients presenting with acute and minor cerebral ischemia due to stenosis ≥70%, who had received medical therapy with or without stenting (Wingspan), were invited...
June 14, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28635238/-comparison-of-vacuum-bag-fixation-and-orfit-rack-with-thermoplastic-membrane-fixation-for-image-guided-cervical-cancer-radiotherapy
#2
Y B Li, Y L Wang, Y H Zhuo
Objective: To compare the difference of displacement between the vacuum bag fixation and the Orfit rack with thermoplastic membrane fixation of the cervical cancer patients, and to explore the individual fixation of the patients. Methods: We retrospectively analyzed the clinical data of 66 patients diagnosed as cervical cancer in Zhangzhou Municipal Hospital of Fujian Province from December 2014 to April 2016. Among them, 33 patients were fixed with vacuum bag, 33 patients were fixed with the Orfit rack with thermoplastic membrane...
June 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28631190/pedicle-screw-insertion-accuracy-in-terms-of-breach-and-reposition-using-a-new-intraoperative-cone-beam-computed-tomography-imaging-technique-and-evaluation-of-the-factors-associated-with-these-parameters-of-accuracy-a-series-of-695-screws
#3
Virginie Cordemans, Ludovic Kaminski, Xavier Banse, Bernard G Francq, Christine Detrembleur, Olivier Cartiaux
PURPOSE: The goals of this study were to assess the accuracy of pedicle screw insertion using an intraoperative cone beam computed tomography (CBCT) system, and to analyze the factors potentially influencing this accuracy. METHODS: Six hundred and ninety-five pedicle screws were inserted in 118 patients between October 2013 and March 2016. Screw insertion was performed using 2D-fluoroscopy or CBCT-based navigation. Accuracy was assessed in terms of breach and reposition...
June 19, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28630855/qualitative-correlation-between-postoperatively-increased-vertical-dimension-and-mandibular-position-in-skeletal-class-iii-using-partial-least-square-path-modeling
#4
Na-Ri Kim, Soo-Byung Park, Jihyun Lee, Youn-Kyung Choi, Sang Min Shin, Yong-Seok Choi, Yong-Il Kim
BACKGROUND: This study constructed a partial-least-square path-modeling (PLS-PM) model and found the pathway by which the postsurgical vertical dimension (VD) affects the extent of the final mandibular setback on the B point at the posttreatment stage for the skeletal class III surgery-first approach (SFA). METHODS: This study re-analyzed the data from the retrospective study by Lee et al. on 40 patients with skeletal class III bimaxillary SFA. Variables were obtained from cone beam computed tomography (CBCT)-generated cephalograms...
December 2017: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28628161/-detection-and-management-of-the-vascular-paths-in-the-lateral-sinus-wall-using-cone-beam-computed-tomography
#5
(no author information available yet)
OBJECTIVE: To detect the vascular paths in the lateral wall of maxillary sinus using cone beam computer tomography (CBCT), and to retrospect the surgical managements of avoiding bleeding complication during the lateral approach maxillary sinus elevation. METHODS: The documents of 71 consecutive patients with 81 sides maxillary sinus elevation surgery were collected. The vascular paths in the lateral wall of maxillary sinus were detected by the preoperative CBCT, and the messages about the vascular in surgical records were analyzed...
June 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28626876/optical-molecular-imaging-guided-radiation-therapy-part-2-integrated-x-ray-and-fluorescence-molecular-tomography
#6
Junwei Shi, Thirupandiyur S Udayakumar, Zhiqun Wang, Nesrin Dogan, Alan Pollack, Yidong Yang
PURPOSE: Differentiating tumor from its surrounding soft tissues is challenging for x-ray computed tomography (CT). Fluorescence molecular tomography (FMT) can directly localize the internal tumors targeted with specific fluorescent probes. A FMT system was developed and integrated onto a CT guided irradiator to improve tumor localization for image guided radiation. METHODS: The FMT system was aligned orthogonal to the cone beam CT onboard our previously developed image guided small animal arc radiation treatment system (iSMAART)...
June 19, 2017: Medical Physics
https://www.readbyqxmd.com/read/28624835/cbct-location-of-the-fusion-between-the-buccal-and-lingual-cortical-in-the-mandibular-ramus-importance-to-sagittal-split-osteotomy
#7
L Scomparin, M-Q-S Soares, C-M-F Rubira, R-Y-F Yaedú, T-S-N Imada, B-S Centurion, E-S Tolentino, J-R-P Lauris, I-R-F Rubira-Bullen
BACKGROUND: Mandibular Sagittal Split Osteotomy (MSSO) is a popular technique in orthognathic surgery used both to advance and to retreat the mandible. However, MSSO may incur in important complications, such as bad splits and sensorineural injuries. Knowing the location of the fusion between the buccal and lingual cortical (FBLC) in the mandibular ramus and the bone thickness in the region where osteotomies will be performed is determinant in MSSO planning to avoid complications. The aim of this study was to document and evaluate possible differences between sexes regarding the location of the FBLC in relation to the superior cortical of mandibular foramen (MF) and bone thickness in the region of interest for MSSO in a Brazilian population...
June 18, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28624341/extranodal-lymphoma-arising-within-the-maxillary-alveolus-a-case-report
#8
David MacDonald, Thomas Li, Siu Fai Leung, Justin Curtin, Andy Yeung, Montgomery A Martin
OBJECTIVE: Extranodal lymphomas affecting the head and neck arise infrequently within the bones of the jaws. This is a report of a symptom-free patient whose general dentist detected a radiolucency as an incidental finding on conventional radiography. STUDY DESIGN: The conventional radiography of lesions in the maxilla displayed "floating teeth" indicative of malignancy. This case was then imaged by cone beam computed tomography (CBCT), multidetector computed tomography (MDCT), and magnetic resonance imaging (MRI)...
May 4, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28623685/two-stage-ridge-split-at-narrow-alveolar-mandibular-bone-ridges
#9
Ivo Agabiti, Daniele Botticelli
PURPOSE: When the bone ridge is corticalized, the displacement of the buccal plate may result in an unintentional malfracture. The aim of this study was to report the results of a 2-stage atrophic alveolar ridge expansion performed with a sonic-air surgical instrument. MATERIALS AND METHODS: In this retrospective cohort study, the atrophic distal segments of the mandible were treated by a split-thickness flap approach and application of an alveolar ridge expansion performed in 2 surgical phases...
May 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28621324/marginal-bone-loss-around-non-submerged-implants-is-associated-with-salivary-microbiome-during-bone-healing
#10
Xiao-Bo Duan, Ting-Xi Wu, Yu-Chen Guo, Xue-Dong Zhou, Yi-Ling Lei, Xin Xu, An-Chun Mo, Yong-Yue Wang, Quan Yuan
Marginal bone loss during bone healing exists around non-submerged dental implants. The aim of this study was to identify the relationship between different degrees of marginal bone loss during bone healing and the salivary microbiome. One hundred patients were recruited, and marginal bone loss around their implants was measured using cone beam computed tomography during a 3-month healing period. The patients were divided into three groups according to the severity of marginal bone loss. Saliva samples were collected from all subjected and were analysed using 16S MiSeq sequencing...
June 16, 2017: International Journal of Oral Science
https://www.readbyqxmd.com/read/28621286/endodontic-management-of-dilacerated-maxillary-central-incisor-fused-to-a-supernumerary-tooth-using-cone-beam-computed-tomography-an-unusual-clinical-presentation
#11
Thilla S Vinothkumar, Deivanayagam Kandaswamy, Ganesh Arathi, Sathishkumar Ramkumar, Gnanasekaran Felsypremila
AIM: The purpose of this report is to present a case of endodontic management of a dilacerated maxillary central incisor fused to supernumerary tooth unusually appearing as a labial tubercle using cone beam computed tomography (CBCT) as a diagnostic aid. BACKGROUND: Anterior teeth are commonly encountered with aberrant anatomical variations in the crown, number of roots, and root canals. Fusion is an infrequent developmental abnormality in shape of the tooth caused by the union of two adjacent tooth germs...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28620632/prevalence-of-soft-tissue-calcifications-in-cbct-images-of-mandibular-region
#12
Leila Khojastepour, Abdolaziz Haghnegahdar, Hamed Sayar
STATEMENT OF THE PROBLEM: Most of the soft tissue calcifications within the head and neck region might not be accompanied by clinical symptoms but may indicate some pathological conditions. PURPOSE: The aim of this research was to determine the prevalence of soft tissue calcifications in cone beam computed tomography (CBCT) images of mandibular region. MATERIALS AND METHOD: In this cross sectional study the CBCT images of 602 patients including 294 men and 308 women with mean age 41...
June 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28617737/3d-cone-beam-computed-tomography-volumetric-outcomes-of-rhbmp-2-demineralized-bone-matrix-vs-iliac-crest-bone-graft-for-alveolar-cleft-reconstruction
#13
Fan Liang, Stephen Yen, Thomas Imahiyerobo, Luke Sanborn, Leia Yen, Daniel Yen, Sheila Nazarian, Breanna Jedrzejewski, Mark Urata, Jeffrey Hammoudeh
BACKGROUND: Recent studies indicate that recombinant human bone morphogenetic protein (rhBMP-2) in a demineralized bone matrix scaffold (MS) is a comparable alternative to iliac bone autograft in the setting of secondary alveolar cleft repair. Post-reconstruction occlusal radiographs demonstrate improved bone stock when rhBMP-2/MS is used, but lack the capacity to evaluate bone growth in three dimensions. This study uses cone beam computed tomography (CBCT) to provide the first clinical evaluation of volumetric and density comparisons between these two treatment modalities...
June 14, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28613920/diagnosis-of-alveolar-and-root-fractures-in-macerated-canine-maxillae-a-comparison-between-two-different-cbct-protocols
#14
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
https://www.readbyqxmd.com/read/28611329/comparative-evaluation-of-shaping-ability-of-v-taper-2h-protaper-next-and-hyflex-cm-in-curved-canals-using-cone-beam-computed-tomography-an-in-vitro-study
#15
Pratima Ramakrishna Shenoi, Disha Anand Luniya, Gautam Pyarelal Badole, Chetana Sachin Makade, Rajesh Kubde, Rajiv Tarachand Khode
AIM: The aim of this study was to compare the canal transportation and canal centering ability in the preparation of curved root canals after instrumentation with V-Taper 2H, ProTaper Next (PN), and Hyflex CM files using cone-beam computed tomography (CBCT). MATERIALS AND METHODS: Thirty mesiobuccal canals of mandibular molars with an angle of curvature ranging from 20 to 40 were divided according to the instrument used in canal preparation into three groups of ten samples each: V-Taper 2H (Group 1), PN (Group 2), and Hyflex CM (Group 3)...
March 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28609790/analysis-of-patients-x-ray-exposure-in-146-percutaneous-radiologic-gastrostomies
#16
Tim Ole Petersen, Martin Reinhardt, Jochen Fuchs, Dieter Gosch, Alexey Surov, Patrick Stumpp, Thomas Kahn, Michael Moche
Purpose Analysis of patient´s X-ray exposure during percutaneous radiologic gastrostomies (PRG) in a larger population. Materials and Methods Data of primary successful PRG-procedures, performed between 2004 and 2015 in 146 patients, were analyzed regarding the exposition to X-ray. Dose-area-product (DAP), dose-length-product (DLP) respectively, and fluoroscopy time (FT) were correlated with the used x-ray systems (Flatpanel Detector (FD) vs. Image Itensifier (BV)) and the necessity for periprocedural placement of a nasogastric tube...
June 13, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28609507/use-of-intraoral-welding-to-increase-the-predictability-of-immediately-loaded-computer-guided-implants
#17
Alberto Maria Albiero, Renato Benato, Andrea Benato, Marco Degidi
Inaccuracy of computer-guided implant placement may lead to complications when combined with an immediately loaded prefabricated prosthesis. The aim of this case series was to describe the use of an intraoral welding technique to increase the predictability of immediately loaded implants supporting a fixed full-arch prosthesis after computer-guided flapless implant placement. A total of 60 Ankylos plus implants (Dentsply) with a width of 3.5 mm and a length of 8 to 14 mm were placed consecutively in 10 patients...
July 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28609506/early-orthodontic-tooth-movement-into-regenerative-bony-defects-a-case-report
#18
Hui-Chen Tsai, Chung-Chen Jane Yao, Man-Ying Wong
Early orthodontic tooth movement following regenerative surgery is controversial. In this case, during protraction of the maxillary right first premolar to substitute for the long-term missing maxillary right canine, Bio-Oss and Bio-Gide were used for lateral ridge augmentation at the area of the maxillary right lateral incisor and to cover the denuded surface at the buccal side of the first premolar. Orthodontic tooth movement (OTM) commenced 2 weeks after regenerative surgery. After 8 months, new bone formation was observed on the root surface of the first premolar during implant surgery...
July 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28609499/comparison-of-periodontal-biotypes-between-maxillary-and-mandibular-anterior-teeth-a-clinical-and-radiographic-study
#19
Andrés Pascual, Lucía Barallat, Antonio Santos, Paul Levi, Mónica Vicario, José Nart, Kyrenia Medina, Georgios E Romanos
Periodontal biotype is a key element influencing esthetic treatment outcomes in clinical practice. However, while the soft and hard tissue thicknesses of maxillary anterior teeth have been widely studied, information regarding mandibular anterior teeth is scarce. Therefore, the aim of this study was to determine whether there is a relationship in terms of hard and soft tissue thickness between maxillary and mandibular anterior teeth. The present study included 90 maxillary and 90 mandibular anterior teeth in 15 healthy patients...
July 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28609497/retrospective-case-series-analysis-to-evaluate-ridge-augmentation-procedure-applied-to-immediate-implant-placement-in-the-esthetic-zone-five-year-longitudinal-evaluation-using-cone-beam-computed-tomography
#20
Yasuhiro Takai, Kazuhisa Ouhara, Alexandru Movila, Toshihisa Kawai
Using simultaneous transplantation of bone graft materials, this study examined the long-term outcomes of a ridge augmentation technique applied to deficient labial alveolar bone plate in the esthetic zone. Results were based on a case series in which study cases (n = 10) were divided into two groups. Group 1 exhibited intact labial alveolar bone, while group 2 alveolar bone was dehiscent at the labial aspect. The clinical outcome was longitudinally monitored using cone beam computed tomography 4 to 7 years after the procedure...
July 2017: International Journal of Periodontics & Restorative Dentistry
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