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https://www.readbyqxmd.com/read/29457934/early-placement-of-dental-implants-in-maxillary-sinus-grafted-with-leukocyte-and-platelet-rich-fibrin-l-prf-and-deproteinized-bovine-bone-mineral
#1
Elton Carlos Pichotano, Rafael Scaf de Molon, Luiz Guilherme Freitas de Paula, Ricardo Violante de Souza, Elcio Marcantonio, Daniela Leal Zandim-Barcelos
This case report aimed to describe the effects of leukocyte and platelet-rich fibrin (L-PRF) associated with deproteinized bovine bone mineral (DBBM) and absorbable collagen membrane (CM) on bone regeneration in maxillary sinus augmentation. A 59-year-old male patient was referred to the Department of Periodontology for implant rehabilitation of his edentulous upper jaw. The treatment plan involved maxillary sinus augmentation followed by implants installation. A split-mouth design was employed, in which the right maxillary sinus was filled using L-PRF, DBBM, and CM; the left side was filled with DBBM and CM...
February 19, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29457751/intra-and-inter-fraction-uncertainties-during-igrt-for-wilms-tumor
#2
Filipa Guerreiro, Enrica Seravalli, Geert O Janssens, Cees P van de Ven, Marry M van den Heuvel-Eibrink, Bas W Raaymakers
BACKGROUND AND PURPOSE: To assess intra- and inter-fraction motion uncertainties, due to displacements of the tumor bed (TB) and organs at risk (OAR), as well as intra- and inter-fraction patient set-up uncertainties, due to positioning variations, during image-guided radiation therapy (IGRT) in children with Wilms' tumor. MATERIAL AND METHODS: Four-dimensional computed tomography (4D-CT) and daily pre- and post-treatment cone-beam CT (CBCT)-scans of 15 patients (average 4, range 1-8 years) undergoing flank irradiation after nephrectomy were analyzed...
February 19, 2018: Acta Oncologica
https://www.readbyqxmd.com/read/29456957/-is-cone-beam-computed-tomography-cbct-a-potential-imaging-tool-in-ent-practice-a-cross-sectional-survey-among-ent-surgeons-in-the-state-of-odisha-india
#3
S Lata, S K Mohanty, S Vinay, Abhaya Chandra Das, Sanjib Das, Priyadarshini Choudhury
This questioner survey aimed about awareness of the Cone Beam Computed Tomography (CBCT) machine and its various clinical applications in ENT, among the ENT surgeons in the state of Odisha. 150 questioner forms on CBCT were distributed to the all the participating ENT surgeons at a state level ENT conference, out of which the response rate was 110. The participants were asked to answer 30 multiple choice questions, which were divided into 3 parts; general information on CBCT, general approach to CBCT and practice related to CBCT...
March 2018: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29456772/multidimensional-analysis-of-curved-root-canal-preparation-using-continuous-or-reciprocating-nickel-titanium-instruments
#4
Iussif Mamede-Neto, Álvaro Henrique Borges, Ana Helena Gonçalves Alencar, Marco Antonio Hungaro Duarte, Manoel Damião Sousa Neto, Carlos Estrela
Objective: To evaluate transportation (T) and centering ability (CA) of root canal preparations using continuous or reciprocating nickel-titanium endodontic files. Materials and Methods: Ninety-six mesiobuccal root canals of mandibular first and second molars were randomly divided into 6 groups (n=16) according to the rotary file used: 1. ProTaper Next; 2. ProTaper Gold; 3. Mtwo; 4. BioRaCe; 5. WaveOne Gold; 6. Reciproc. Root canals were prepared according to manufacturer's instructions...
2018: Open Dentistry Journal
https://www.readbyqxmd.com/read/29456635/clinical-effect-of-platelet-rich-fibrin-on-the-preservation-of-the-alveolar-ridge-following-tooth-extraction
#5
Yingdi Zhang, Zheng Ruan, Minhua Shen, Luanjun Tan, Weiqin Huang, Lei Wang, Yuanliang Huang
The aim of the present study was to evaluate the clinical efficacy of platelet-rich fibrin (PRF) in preserving the alveolar ridge following human tooth extraction. A total of 28 patients were divided into two groups: The experimental and control groups (n=14 each). Following tooth extraction, the experimental group was implanted with PRF membrane, whereas the control group was not. The gingival healing effect was assessed at 7 days, 1 and 3 months later. Cone-beam computed tomography was performed immediately and at 3 months following tooth extraction...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29453893/cbct-guided-evolutive-library-for-cervical-adaptive-imrt
#6
Bastien Rigaud, Antoine Simon, Maxime Gobeli, Caroline Lafond, Julie Leseur, Anais Barateau, Nicolas Jaksic, Joël Castelli, Danièle Williaume, Pascal Haigron, Renaud De Crevoisier
PURPOSE: In the context of adaptive radiation therapy (ART) for locally advanced cervical carcinoma (LACC), this study proposed an original cone-beam computed tomography (CBCT)-guided "Evolutive library" and evaluated it against four other known radiotherapy (RT) strategies. MATERIAL AND METHODS: For 20 patients who underwent intensity-modulated radiation therapy (IMRT) for LACC, three planning CTs (with empty [EB], intermediate [IB], and full [FB] bladder volumes), a CT scan at 20 Gy and bi-weekly CBCTs for 5 weeks were performed...
February 17, 2018: Medical Physics
https://www.readbyqxmd.com/read/29452866/intrapatient-study-comparing-3d-printed-bolus-versus-standard-vinyl-gel-sheet-bolus-for-postmastectomy-chest-wall-radiation-therapy
#7
James L Robar, Kathryn Moran, James Allan, James Clancey, Tami Joseph, Krista Chytyk-Praznik, R Lee MacDonald, John Lincoln, Parisa Sadeghi, Robert Rutledge
PURPOSE: This patient study evaluated the use of 3-dimensional (3D) printed bolus for chest wall radiation therapy compared with standard sheet bolus with regard to accuracy of fit, surface dose measured in vivo, and efficiency of patient setup. By alternating bolus type over the course of therapy, each patient served as her own control. METHODS AND MATERIALS: For 16 patients undergoing chest wall radiation therapy, a custom 5.0 mm thick bolus was designed based on the treatment planning computed tomography scan and 3D printed using polylactic acid...
December 24, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/29450961/volumetric-based-image-guidance-is-superior-to-marker-based-alignments-for-stereotactic-body-radiotherapy-of-prostate-cancer
#8
Wen Li, Lan Lu, Kevin L Stephans, Naveen Sharma, Andrew Vassil, Zhilei Liu Shen, Abigail Stockham, Toufik Djemil, Rahul D Tendulkar, Ping Xia
PURPOSES: The aim of this study was to evaluate a dual marker-based and soft-tissue based image guidance for inter-fractional corrections in stereotactic body radiotherapy (SBRT) of prostate cancer. METHODS/MATERIALS: We reviewed 18 patients treated with SBRT for prostate cancer. An endorectal balloon was inserted at simulation and each treatment. Planning margins were 3 mm/0 mm posteriorly. Prior to each treatment, a dual image guidance protocol was applied to align three makers using stereoscopic x ray images and then to the soft tissue using kilo-voltage cone beam CT (kV-CBCT)...
February 15, 2018: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29450945/clinical-application-of-3d-technology-for-tooth-autotransplantation-a-case-report
#9
Keunhee Kim, Hee-Seung Choi, Nan-Sim Pang
This report presents two cases of tooth autotransplantation using cone-beam computed tomography (CBCT), the three-dimensional (3D) simulation dental planning software and a computer-aided rapid prototyping (CARP) model. Two hopeless teeth of adult patients were replaced as their third molar teeth. Before deciding the autotransplantation, diagnostic CBCT images were acquired and imported to SimPlant software. The SimPlant dental program was used for surgical simulation prior to autotransplantation, which created 3D images of the available donor teeth and recipient site tooth and superimposed the images to display their morphological similarity...
February 16, 2018: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/29448905/restoration-of-sleep-using-a-novel-biomimetic-protocol-for-adult-osa-clinical-case-report
#10
G Dave Singh, Mark Kraver, Oleg Chernyshev
Background A sleep study of a 56-year old male with excessive daytime sleepiness demonstrated an AHI of 16.4hr -1 with 13% of total sleep time in REM sleep and a mean oxygen desaturation (SpO 2 ) of 86%. Clinical presentation On intra-oral examination, it was found that the patient had maxillary hypoplasia and bilateral torus mandibularis. A 3D cone-beam CT (CBCT) scan was taken, and 28 craniofacial parameters were measured. Surgical reduction of the mandibular tori followed by biomimetic oral appliance therapy (BOAT) was initiated...
February 15, 2018: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/29448877/a-new-methodology-for-the-measurement-of-the-root-canal-curvature-and-its-3d-modification-after-instrumentation
#11
Asterios Christodoulou, Georgios Mikrogeorgis, Triantafillia Vouzara, Konstantinos Papachristou, Christos Angelopoulos, Nikolaos Nikolaidis, Ioannis Pitas, Kleoniki Lyroudia
OBJECTIVE: In this study, the three-dimensional (3D) modification of root canal curvature was measured, after the application of Reciproc instrumentation technique, by using cone beam computed tomography (CBCT) imaging and a special algorithm developed for the 3D measurement of the curvature of the root canal. MATERIALS AND METHODS: Thirty extracted upper molars were selected. Digital radiographs for each tooth were taken. Root curvature was measured by using Schneider method and they were divided into three groups, each one consisting of 10 roots, according to their curvature: Group 1 (0°-20°), Group 2 (21°-40°), Group 3 (41°-60°)...
February 15, 2018: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/29448262/assessment-of-location-of-the-mandibular-canal-correlation-between-panoramic-and-cone-beam-computed-tomography-measurements
#12
Felix Bertram, Stefan Bertram, Ansgar Rudisch, Rüdiger Emshoff
PURPOSE: To compare panoramic and cone beam computed tomography (CBCT) determinations of implant-to-mandibular canal (MC) dimensions in mandibular regions posterior to the mental foramen and to investigate whether factors such as gender, age, region, and vertical dimension influence correlation between the two techniques. MATERIALS AND METHODS: A retrospective analysis was carried out in 64 consecutive adult patients (42 females, 22 males; average age 57.1 ± 13...
February 15, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29447324/accuracy-and-usefulness-of-cbct-in-periodontology-a-systematic-review-of-the-literature
#13
Johan Peter Woelber, Jonathan Fleiner, Julia Rau, Petra Ratka-Krüger, Christian Hannig
A systematic literature review was performed regarding the accuracy and usefulness of cone beam computed tomography (CBCT) in the field of periodontology. A total of 580 articles were identified, of which 13 met the inclusion criteria. Results showed a high accuracy of CBCT in visualizing periodontal structures and the demonstrated the usefulness of CBCT in regenerative periodontal surgery of maxillary molars. It remains questionable whether this gain of additional information actually leads to a better clinical outcome in periodontal treatment...
March 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29447317/evaluation-of-bone-stability-and-esthetic-results-after-immediate-implant-placement-using-a-novel-synthetic-bone-substitute-in-the-anterior-zone-results-after-12-months
#14
Albert Barroso-Panella, Jordi Gargallo-Albiol, Federico Hérnandez-Alfaro
The aim of this study was to assess bone and soft tissue changes after tooth extraction and immediate implant insertion in the anterior maxilla. A novel synthetic bone graft (VivOss, Straumann) was used to fill the gap between the implant surface and the alveolar bone. Implants with a reduced diameter compared to the size of the socket were used. A fixed or removable provisional restoration was provided immediately after implant placement. Cone beam computed tomography (CBCT) scans were taken to evaluate bone changes, showing minor variations after 12 months of follow-up...
March 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29447260/optimal-dose-reduction-algorithm-using-an-attenuation-based-tube-current-modulation-method-for-cone-beam-ct-imaging
#15
Kihong Son, Jieun Chang, Hoyeon Lee, Changhwan Kim, Taewon Lee, Seungryong Cho, Sohyun Park, Jin Sung Kim
To reduce the radiation dose given to patients, a tube current modulation (TCM) method has been widely used in diagnostic CT systems. However, the TCM method has not yet been applied to a kV-CBCT system on a LINAC machine. The purpose of this study is to investigate if a TCM method would be desirable in a kV-CBCT system for image-guided radiation therapy (IGRT) or not. We have developed an attenuation-based TCM method using prior knowledge from planning CT images of patients. The TCM method can provide optimized dose reductions without degrading image quality for kV-CBCT imaging...
2018: PloS One
https://www.readbyqxmd.com/read/29446235/quantitative-evaluation-of-the-performance-of-different-deformable-image-registration-algorithms-in-helical-axial-and-cone-beam-ct-images-using-a-mobile-phantom
#16
Imad Ali, Nesreen Alsbou, Justin Jaskowiak, Salahuddin Ahmad
The goal of this project is to investigate quantitatively the performance of different deformable image registration algorithms (DIR) with helical (HCT), axial (ACT), and cone-beam CT (CBCT). The variations in the CT-number values and lengths of well-known targets moving with controlled motion were evaluated. Four DIR algorithms: Demons, Fast-Demons, Horn-Schunck and Lucas-Kanade were used to register intramodality CT images of a mobile phantom scanned with different imaging techniques. The phantom had three water-equivalent targets inserted in a low-density foam with different lengths (10-40 mm) and moved with adjustable motion amplitudes (0-20 mm) and frequencies (0-0...
February 15, 2018: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29443031/ultrasound-cyclo-plasty-in-eyes-with-glaucoma
#17
Giuseppe Giannaccare, Stefano Sebastiani, Emilio C Campos
Glaucoma is a chronic disease caused by the progressive degeneration of the optical nerve fibers, resulting in decreased visual field that can lead to severe visual impairment, and eventually blindness. This manuscript describes a simple, surgeon-friendly, non-incisional technique, named Ultrasound Cyclo Plasty (UCP), for reducing intraocular pressure (IOP) in glaucoma patients. The technique determines a selective coagulation necrosis of the ciliary body; in addition, the stimulation of supra-choroidal and trans-scleral portions of the uveo-scleral outflow pathway has been recently proposed...
January 26, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29439412/congenital-vomer-agenesis-a-rare-and-poorly-understood-condition-revealed-by-cone-beam-ct
#18
David Jun Yan, Vincent Lenoir, Sibylle Chatelain, Salvatore Stefanelli, Minerva Becker
Isolated congenital vomer agenesis is a very rare and poorly understood condition. In the context of dental work-up by cone-beam computed tomography (CBCT), the explored volume of the facial bones occasionally reveals incidental abnormalities. We report the case of a 13-year old Caucasian female who underwent CBCT for the pre-treatment evaluation of primary failure of tooth eruption affecting the permanent right upper and inferior molars. CBCT depicted a large defect of the postero-inferior part of the nasal septum without associated soft tissue abnormality and without cranio-facial malformation or cleft palate...
February 10, 2018: Diagnostics
https://www.readbyqxmd.com/read/29438205/evaluation-of-postoperative-stability-after-open-reduction-and-internal-fixation-of-zygomaticomaxillary-complex-fractures-using-cone-beam-computed-tomography-analysis
#19
Hyo-Jung Kim, Kyung-Hwan Bang, Eun-Ji Park, Yeong-Cheol Cho, Iel-Yong Sung, Jang-Ho Son
The aim of this study was to evaluate whether the amount of fracture displacement affects postoperative stability of isolated zygomaticomaxillary complex fractures and to determine whether the 1-point fixation method is as stable as 2- or 3-point fixation methods. The authors investigated 14 patients with 1-point fixation in the zygomaticomaxillary area (group A), 14 patients with 2-point fixation in the zygomaticomaxillary and frontozygomatic area (group B), and 13 patients with 3-point fixation in the zygomaticomaxillary, frontozygomatic, and infraorbital rim area (group C)...
February 12, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29437516/ideal-versus-late-secondary-alveolar-bone-graft-surgery-a-bone-thickness-cone-beam-computed-tomographic-assessment
#20
Michele Alves Garcia, Marilia Yatabe, Thais Ustulin Fuzer, Adriana Maria Calvo, Ivy Kiemle Trindade-Suedam
OBJECTIVE: To compare the bone morphology after secondary alveolar bone graft surgery (SABG) performed before and after permanent canine eruption. DESIGN: Cross-sectional study. SETTING: Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, SP, Brazil. PATIENTS: 25 cone-beam computed tomography (CBCT) scans of complete unilateral cleft lip and palate (CLP) individuals who underwent SABG before or after eruption of the permanent canine taken 2 and 6 months (T1 and T2) after SAGB, resulting in 50 CBCT scans...
March 2018: Cleft Palate-craniofacial Journal
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