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https://www.readbyqxmd.com/read/28063782/acceptable-clinical-outcomes-and-recommended-reconstructive-strategies-for-secondary-maxillary-reconstruction-with-vascularized-fibula-osteomyocutaneous-flap-a-retrospective-analysis
#1
Yi Shen, Jun Li, Andrew Ow, Liang Wang, Ming-Ming Lv, Jian Sun
BACKGROUND: We conducted a retrospective analysis of the clinical outcomes and evaluated the reconstructive strategies in patients who underwent secondary maxillary reconstruction with a vascularized fibula osteomyocutaneous flap (VFOF). METHODS: From May of 2001 to June of 2014, 34 patients who underwent secondary maxillary reconstruction with VFOF, with or without titanium mesh, were reviewed. The patients were divided into two groups of maxillary reconstruction, according to different planning and treatment strategies...
December 14, 2016: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28056453/reduction-of-motion-artifacts-and-noise-using-independent-component-analysis-in-task-based-functional-mri-for-preoperative-planning-in-patients-with-brain-tumor
#2
E H Middlebrooks, C J Frost, I S Tuna, I M Schmalfuss, M Rahman, A Old Crow
BACKGROUND AND PURPOSE: Although it is a potentially powerful presurgical tool, fMRI can be fraught with artifacts, leading to interpretive errors, many of which are not fully accounted for in routinely applied correction methods. The purpose of this investigation was to evaluate the effects of data denoising by independent component analysis in patients undergoing preoperative evaluation for glioma resection compared with more routinely applied correction methods such as realignment or motion scrubbing...
November 10, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28049034/hypervascular-lesions-of-the-cerebellopontine-angle-the-relevance-of-angiography-as-a-diagnostic-and-therapeutic-tool-and-the-role-of-stereotactic-radiosurgery-in-management-a-comprehensive-review
#3
REVIEW
Yosef Laviv, Ajith Thomas, Ekkehard M Kasper
The cerebellopontine angle (CPA) is a narrowed skull base area, containing important cranial nerves and vessels and bordering with eloquent areas of the posterior fossa. Tumors of the CPA are a heterogeneous group and can arise extradural, intradural-extraaxial or intraaxial. Accordingly, their vascular supply changes, depending on their anatomical origin. Symptomatic, large CPA tumors require surgical resection in order to prevent irreversible, severe neurological damages. However, its tight and strategical location make surgery in the CPA very challenging and require appropriate pre-surgical planning...
December 31, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/28027961/the-clinical-relevance-of-distortion-correction-in-presurgical-fmri-at-7t
#4
Pedro Lima Cardoso, Barbara Dymerska, Beáta Bachratá, Florian Ph S Fischmeister, Nina Mahr, Eva Matt, Siegfried Trattnig, Roland Beisteiner, Simon Daniel Robinson
Presurgical planning with fMRI benefits from increased reliability and the possibility to reduce measurement time introduced by using ultra-high field. Echo-planar imaging suffers, however, from geometric distortions which scale with field strength and potentially give rise to clinically significant displacement of functional activation. We evaluate the effectiveness of a dynamic distortion correction (DDC) method based on unmodified single-echo EPI in the context of simulated presurgical planning fMRI at 7T and compare it with static distortion correction (SDC)...
December 24, 2016: NeuroImage
https://www.readbyqxmd.com/read/28018675/description-of-ictal-hfo-mapping-in-patients-with-both-temporal-and-extratemporal-seizure-focus
#5
Juan G Ochoa, Walter G Rusyniak
Objective. Review presurgical use of ictal HFO mapping to detect ictal activation areas with dual seizure focus in both the temporal and extratemporal cortex. Methods. Review of consecutive patients admitted to the University of South Alabama Epilepsy Monitoring Unit (SouthCEP) between January 2014 and October 2015, with suspected temporal lobe epilepsy and intracranial electrode recording. Ictal HFO localization was displayed in 3D reconstructed brain images using the patient's own coregistered magnetic resonance imaging (MRI) and computed tomography (CT) with the implanted electrodes...
2016: Neurology Research International
https://www.readbyqxmd.com/read/28000280/modern-implant-dentistry-based-on-osseointegration-50%C3%A2-years-of-progress-current-trends-and-open-questions
#6
REVIEW
Daniel Buser, Lars Sennerby, Hugo De Bruyn
In the 1960s and 1970s, implant-supported prostheses based on subperiosteal or blade implants had a poor reputation because of questionable clinical outcomes and lack of scientific documentation. The change to a scientifically sound discipline was initiated by the two scientific pioneers of modern implant dentistry, Professor P. I. Brånemark from the University of Gothenburg in Sweden and Professor André Schroeder from the University of Bern in Switzerland. Together with their teams, and independently of each other, they laid the foundation for the most significant development and paradigm shift in dental medicine...
February 2017: Periodontology 2000
https://www.readbyqxmd.com/read/27977586/application-of-a-3-dimensional-printed-navigation-template-in-bernese-periacetabular-osteotomies-a-cadaveric-study
#7
You Zhou, Xiaopeng Kang, Chuan Li, Xiaoshan Xu, Rong Li, Jun Wang, Wei Li, Haotian Luo, Sheng Lu
The aim of the present study was to describe the application of 3D printed templates for intraoperative navigation and simulation of periacetabular osteotomies (PAOs) in a cadaveric model.Five cadaveric specimens (10 sides) underwent thin-slice computed tomographic scans of the ala of ilium downwards to the proximal end of femoral shaft. Bernese PAO was performed. Using Mimics v10.1 software (Materialise, Leuven, Belgium), 3D computed tomographic reconstructions were created and the 4 standard PAO bone cuts-ischial, pubic, anterior, and posterior aspects of the ilium-as well as rotation of the dislocated acetabular bone blocks were simulated for each specimen...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27977489/conjoined-twin-separation-integration-of-three-dimensional-modeling-for-optimization-of-surgical-planning
#8
Benjamin C Wood, Sarah R Sher, Benjamin J Mitchell, Albert K Oh, Gary F Rogers, Michael J Boyajian
Conjoined twinning is a rare anomaly, with an incidence of approximately 1 in 100,000 live births. There is a high perinatal mortality rate, but twins who survive pose reconstructive challenges that require meticulous preoperative planning. The authors describe the senior surgeon's career experience with conjoined twin separation, and the evolution of medical modeling and 3-dimensional imaging as a critical component in presurgical planning.The authors performed a retrospective review of all consecutive patients of conjoined twin separation at a single institution from January 2004 to December 2013...
December 12, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27931117/resection-planning-in-extratemporal-epilepsy-surgery-using-3d-multimodality-imaging-and-intraoperative-mri
#9
Mark Nowell, Rachel Sparks, Gergely Zombori, Anna Miserocchi, Roman Rodionov, Beate Diehl, Tim Wehner, Mark White, Sebastien Ourselin, Andrew McEvoy, John Duncan
Surgical resection in non-lesional, extratemporal epilepsy, informed by stereoEEG recordings, is challenging. There are no clear borders of resection, and the surgeon is often operating in deep areas of the brain that are difficult to access. We present a technical note where 3D multimodality image integration in EpiNav(TM) is used to build a planned resection model, based on a previous intracranial EEG evaluation. Intraoperative MRI is then used to ensure a complete resection of the planned model. As stereoEEG becomes more common in the presurgical evaluation of epilepsy, these tools will become increasingly important to facilitate targeted cortical resections...
December 8, 2016: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/27918961/the-promise-of-subtraction-ictal-spect-co-registered-to-mri-for-improved-seizure-localization-in-pediatric-epilepsies-affecting-factors-and-relationship-to-the-surgical-outcome
#10
Catherine Stamoulis, Nishant Verma, Himanshu Kaulas, Jonathan J Halford, Frank H Duffy, Phillip L Pearl, S Ted Treves
OBJECTIVE: Ictal SPECT is promising for accurate non-invasive localization of the epileptogenic brain tissue in focal epilepsies. However, high quality ictal scans require meticulous attention to the seizure onset. In a relatively large cohort of pediatric patients, this study investigated the impact of the timing of radiotracer injection, MRI findings and seizure characteristics on ictal SPECT localizations, and the relationship between concordance of ictal SPECT, scalp EEG and resected area with seizure freedom following epilepsy surgery...
November 30, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/27915065/assessment-of-white-matter-transgression-during-neuroendoscopic-procedures-using-dti-fiber-tracking
#11
Sergio García, Jordina Rincon-Torroella, Arnau Benet, Laura Oleaga, José Juan González Sánchez
BACKGROUND: Presurgical planning allows anticipating intraoperative difficulties, increasing efficiency, and reducing risks. Neuroendoscopy is a minimally invasive technique whose related complications have been focused on cortical function and surface vessels injury. However, white matter disruption has been insufficiently acknowledged. OBJECTIVE: To present a new surgical planning method based on diffusion tensor image that allows quantifying subcortical transgression and optimizing neuroendoscopic trajectories...
November 30, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27878636/imaging-of-secretory-tumors-of-the-gastrointestinal-tract
#12
REVIEW
Yehia M ElGuindy, Sanaz Javadi, Christine O Menias, Corey T Jensen, Haitham Elsamaloty, Khaled M Elsayes
Gastrointestinal secretory tumors, or gastroenteropancreatic neuroendocrine tumors, encompass a wide array of endocrine cell tumors. The significance of these tumors lies in their ability to alter physiology through hormone production as we well as in their malignant potential. Functioning tumors may present earlier due to symptomatology; conversely, non-functioning tumors are often diagnosed late as they reach large sizes, causing symptoms secondary to local mass effect. Imaging aids in the diagnosis, staging, and prognosis and provides key information for presurgical planning...
November 23, 2016: Abdominal Radiology
https://www.readbyqxmd.com/read/27865802/improving-the-medical-curriculum-in-predoctoral-dental-education-recommendations-from-the-american-association-of-oral-and-maxillofacial-surgeons-committee-on-predoctoral-education-and-training
#13
Matthew J Dennis, Jeffrey D Bennett, Dean M DeLuke, Erik W Evans, John W Hudson, Anders Nattestad, Gregory M Ness, Allison Yeung
Dental procedures are often performed on patients who present with some level of medical fragility. In many dental schools, the exercise of taking a medical history is all too often a transcription of information to the dental chart, with little emphasis on the presurgical risk assessment and the development of a treatment plan appropriate to the medical status of the dental patient. Changes in dentistry, driven by an increasingly medically complex population of dental patients, combined with treatment advances rooted in the biomedical sciences necessitate the adaptation of our dental education to include a stronger background in systemic health...
October 26, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27833903/virtual-3d-modeling-of-airways-in-congenital-heart-defects
#14
Simone Speggiorin, Saravanan Durairaj, Branko Mimic, Antonio F Corno
The involvement of the airway is not uncommon in the presence of complex cardiovascular malformations. In these cases, a careful inspection of the relationship between the airway and the vasculature is paramount to plan the surgical procedure. Three-dimensional printing enhanced the visualization of the cardiovascular structure. Unfortunately, IT does not allow to remove selected anatomy to improve the visualization of the surrounding ones. Computerized modeling has the potential to fill this gap by allowing a dynamic handling of different anatomies, increasing the exposure of vessels or bronchi to show their relationship...
2016: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/27824719/radiographic-fractal-and-clinical-resonance-frequency-analyses-of-posterior-mandibular-dental-implants-their-possible-association-with-mandibular-cortical-index-with-12-month-follow-up
#15
Tolga F Tözüm, Erhan Dursun, Serdar Uysal
BACKGROUND: The aim of the present study was to investigate whether the mandibular cortical index (MCI) has a relationship with fractal dimension of bone and/or implant stability, and to justify the possible association between MCI, fractal dimension, and stability. MATERIALS AND METHODS: Eighty-two subjects who received dental implants to replace missing mandibular premolar/molar sites were selected. Three months after surgical placement, implants were restored with fixed ceramic fused metal crowns...
December 2016: Implant Dentistry
https://www.readbyqxmd.com/read/27781402/automated-femoral-landmark-extraction-for-optimal-prosthesis-placement-in-total-hip-arthroplasty
#16
Diogo F de Almeida, Rui B Ruben, João Folgado, Paulo R Fernandes, João Gamelas, Benedict Verhegghe, Matthieu De Beule
The automated extraction of anatomical reference landmarks in the femoral volume may improve speed, precision, and accuracy of surgical procedures, such as total hip arthroplasty. These landmarks are often hard to achieve, even via surgical incision. In addition, it provides a presurgical guidance for prosthesis sizing and placement. This study presents an automated workflow for femoral orientation and landmark extraction from a 3D surface mesh. The extraction of parameters such as the femoral neck axis, the femoral middle diaphysis axis, both trochanters and the center of the femoral head will allow the surgeon to establish the correct position of bony cuts to restore leg length and femoral offset...
October 25, 2016: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/27768542/why-thyroid-surgeons-are-frustrated-with-radiologists-lessons-learned-from-pre-and-postoperative-us
#17
Sachin S Kumbhar, Ryan B O'Malley, Tracy J Robinson, Suresh Maximin, Neeraj Lalwani, David R Byrd, Carolyn L Wang
Optimal treatment of thyroid cancer is highly dependent on accurate staging of the extent of disease at presentation. Preoperative ultrasonography (US) is the most sensitive method for detecting metastatic lymph nodes and is recommended as part of the standard preoperative workup. Missed findings on preoperative scans may lead to understaging and inadequate surgical management, which subsequently predispose these patients to residual disease postoperatively and a higher risk for recurrence, possibly requiring repeat surgery...
October 21, 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/27759998/presurgical-evaluation-of-bony-implant-sites-using-panoramic-radiography-and-cone-beam-computed-tomography-influence-of-medical-education
#18
Michael Dau, Amir Edalatpour, Ralf Schulze, Bilal Al-Nawas, Abdulmonem Alshihri, Peer W Kämmerer
OBJECTIVES: The aim of this study was to compare the subjective quality rating of panoramic radiography (PAN) and cone beam computed tomography (CBCT) in planning of dental implant procedures by clinicians with different educational background. METHODS: Radiographic images (PAN and CBCT) of 42 patients were examined as follows: 10 maxillary (MX) anterior region, 16 MX posterior region and 16 mandibular (MD) posterior region. These sites were used for planning of dental implant insertion...
October 19, 2016: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/27742256/evaluation-of-the-factors-influencing-brain-language-laterality-in-presurgical-planning
#19
Seyed Amir Hossein Batouli, Nafiseh Hasani, Sara Gheisari, Ebrahim Behzad, Mohammad Ali Oghabian
Brain lesions cause functional deficits, and one treatment for this condition is lesion resection. In most cases, presurgical planning (PSP) and the information from laterality indices are necessary for maximum preservation of the critical functions after surgery. Language laterality index (LI) is reliably estimated using functional magnetic resonance imaging (fMRI); however, this measure is under the influence of some external factors. In this study, we investigated the influence of a number of factors on language LI, using data from 120 patients (mean age=35...
October 2016: Physica Medica: PM
https://www.readbyqxmd.com/read/27740987/imaging-of-brain-tumors
#20
Mirza A Baig, Joshua P Klein, Laszlo L Mechtler
PURPOSE OF REVIEW: Neuroimaging is an essential tool for the diagnosis and management of brain tumors. RECENT FINDINGS: Advances in neuroimaging have allowed for noninvasive visualization of tumors and have changed how brain tumors are diagnosed and treated. Presurgical planning with the use of functional MRI (fMRI) and diffusion tensor MRI helps to preserve eloquent regions of the brain and fiber tracts, thereby decreasing patients' postsurgical morbidity. With the use of susceptibility-weighted imaging (SWI) filtered phase images, diffusion-weighted studies, and perfusion imaging techniques, deciphering posttreatment effects versus tumor progression can be facilitated...
October 2016: Continuum: Lifelong Learning in Neurology
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