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https://www.readbyqxmd.com/read/28718167/are-computer-numerical-control-cnc-manufactured-patient-specific-metal-templates-available-for-posterior-thoracic-pedicle-screw-insertion-feasibility-and-accuracy-evaluation
#1
Xiangxue Kong, Lei Tang, Qiang Ye, Wenhua Huang, Jianyi Li
PURPOSE: Accurate and safe posterior thoracic pedicle insertion (PTPI) remains a challenge. Patient-specific drill templates (PDTs) created by rapid prototyping (RP) can assist in posterior thoracic pedicle insertion, but pose biocompatibility risks. The aims of this study were to develop alternative PDTs with computer numerical control (CNC) and assess their feasibility and accuracy in assisting PTPI. METHODS: Preoperative CT images of 31 cadaveric thoracic vertebras were obtained and then the optimal pedicle screw trajectories were planned...
July 17, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28718068/dengue-encephalopathy-very-unusual-neuroimaging-findings
#2
Ravindra Kumar Garg, Hardeep Singh Malhotra, Amita Jain, Neeraj Kumar
Neuroimaging, in many patients with dengue encephalopathy, may reveal periventricular signal changes. We report a 25-year-old man, who presented with altered sensorium. Dengue-IgM test in serum was positive. Cerebrospinal fluid examination was normal. MRI brain revealed presence of bilateral parieto-occipital intraparenchymal bleed with mass effect. Neuroimaging was consistent with posterior reversible encephalopathy syndrome. We report posterior reversible encephalopathy syndrome in a normotensive patient with dengue encephalopathy and systemic metabolic alterations...
July 17, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28715302/characterization-of-humeral-head-displacements-during-dynamic-glenohumeral-neuromuscular-control-exercises-using-quantitative-ultrasound-imaging-a-feasibility-study
#3
Guillaume Desroches, François Desmeules, Dany H Gagnon
The objectives of the present study were to test the feasibility of measuring humeral head displacements using quantitative ultrasound imaging during the performance of two different dynamic glenohumeral neuromuscular control exercises and to investigate the influence of these exercises on the acromiohumeral distance (AHD) and anterior-posterior distance (APD). Ten individuals who have no history of shoulder injury at the non-dominant shoulder completed three repetitions of an active humeral head lowering exercise and three repetitions of a posteriorisation exercise in a random order in a seated position...
June 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28713459/the-effects-of-bench-press-variations-in-competitive-athletes-on-muscle-activity-and-performance
#4
Atle Hole Saeterbakken, Dag-André Mo, Suzanne Scott, Vidar Andersen
The aim of the study was to compare the EMG activity performing 6RM competition style bench press (flat bench-wide grip) with 1) medium and narrow grip widths on a flat bench and 1) inclined and declined bench positions with a wide grip. Twelve bench press athletes competing at national and international level participated in the study. EMG activity was measured in the pectoralis major, anterior and posterior deltoid, biceps brachii, triceps brachii and latissimus dorsi. Non-significant differences in activation were observed between the three bench positions with the exception of 58...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28713312/neural-temporal-dynamics-of-facial-emotion-processing-age-effects-and-relationship-to-cognitive-function
#5
Xiaoyan Liao, Kui Wang, Kai Lin, Raymond C K Chan, Xiaoyuan Zhang
This study used event-related potentials (ERPs) to investigate the effects of age on neural temporal dynamics of processing task-relevant facial expressions and their relationship to cognitive functions. Negative (sad, afraid, angry, and disgusted), positive (happy), and neutral faces were presented to 30 older and 31 young participants who performed a facial emotion categorization task. Behavioral and ERP indices of facial emotion processing were analyzed. An enhanced N170 for negative faces, in addition to intact right-hemispheric N170 for positive faces, was observed in older adults relative to their younger counterparts...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28713039/efficacy-of-ankle-foot-orthoses-types-on-walking-in-children-with-cerebral-palsy-a-systematic-review
#6
REVIEW
Atefeh Aboutorabi, Mokhtar Arazpour, Monireh Ahmadi Bani, Hassan Saeedi, John S Head
BACKGROUND: Ankle foot orthoses (AFOs) are orthotic devices that can be used to normalize the walking pattern of children with cerebral palsy (CP). One of the aims of orthotic management is to produce a more normal gait pattern by positioning joints in the proper position to reduce pathological reflex or spasticity. OBJECTIVE: To conduct a systematic review of the literature and establish the effect of treatment with various types of AFOs on gait patterns of children with CP...
July 13, 2017: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28712632/fracture-resistance-of-endodontically-treated-teeth-restored-with-2-different-fiber-reinforced-composite-and-2-conventional-composite-resin-core-buildup-materials-an-in%C3%A2-vitro-study
#7
Ashly Mary Eapen, L Vijay Amirtharaj, Kavitha Sanjeev, Sekar Mahalaxmi
INTRODUCTION: The purpose of this in vitro study was to comparatively evaluate the fracture resistance of endodontically treated teeth restored with 2 fiber-reinforced composite resins and 2 conventional composite resin core buildup materials. METHODS: Sixty noncarious unrestored human maxillary premolars were collected, endodontically treated (except group 1, negative control), and randomly divided into 5 groups (n = 10). Group 2 was the positive control. The remaining 40 prepared teeth were restored with various direct core buildup materials as follows: group 3 teeth were restored with dual-cure composite resin, group 4 with posterior composite resin, group 5 with fiber-reinforced composite resin, and group 6 with short fiber-reinforced composite resin...
July 13, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28710187/utility-of-microscope-integrated-optical-coherence-tomography-mioct-in-the-treatment-of-myopic-macular-hole-retinal-detachment
#8
Atul Kumar, Prateek Kakkar, Raghav Dinesh Ravani, Ashish Markan
Macular hole-associated retinal detachment in high myopia is described as a final stage in progression of myopic traction maculopathy (MTM).(1â€"3) Shimada et al(4) described the progressive stages of MTM from macular retinoschisis to serous retinal detachment in high myopia. Stage 4 MTM is characterised as disappearance of retinoschisis with progression to retinal detachment due to macular hole formation. It is hypothesised that vitreoschisis and abnormal vitreo-retinal interface create the premacular tangential traction...
July 14, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28708910/influence-of-the-posterior-mandible-ridge-morphology-on-virtual-implant-planning
#9
German O Gallucci, Shirin Khoynezhad, Alfa I Yansane, Jacob Taylor, Daniel Buser, Bernard Friedland
PURPOSE: The purpose of this study was to examine the anatomy of the mandibular posterior region to develop an anatomical categorization for implant-prosthodontic planning. MATERIALS AND METHODS: Using cone beam computed tomography scans, 313 cross-sectional views of edentulous posterior mandibular sites were evaluated with respect to the anatomical ridge morphology. Virtual implant planning was performed, and the need for bone grafting was assessed. The level of complexity for planning implants in those positions was assessed...
July 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28708719/magnetic-resonance-imaging-of-intracranial-hypotension-diagnostic-value-of-combined-qualitative-signs-and-quantitative-metrics
#10
Kerim Aslan, Hediye Pinar Gunbey, Leman Tomak, Zafer Ozmen, Lutfi Incesu
OBJECTIVE: The aim of this study was to investigate whether the use of combination quantitative metrics (mamillopontine distance [MPD], pontomesencephalic angle, and mesencephalon anterior-posterior/medial-lateral diameter ratios) with qualitative signs (dural enhancement, subdural collections/hematoma, venous engorgement, pituitary gland enlargements, and tonsillar herniations) provides a more accurate diagnosis of intracranial hypotension (IH). METHODS: The quantitative metrics and qualitative signs of 34 patients and 34 control subjects were assessed by 2 independent observers...
July 13, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28707131/posterior-locked-lateral-compression-injury-of-the-pelvis-in-geriatric-patients-an-infrequent-and-specific-variant-of-the-fragility-fracture-of-pelvis
#11
Se-Won Lee, Weon-Yoo Kim, Sung-Jun Koh, Young-Yul Kim
INTRODUCTION: Posterior locked lateral compression injury (PLLCI) of the pelvic ring is an infrequent variant of lateral compression injury, a condition described in only eight reported cases since 2000. Lateral compression injury usually results from high-energy trauma and is characterized by locking between the medially translated fractured ilium and the anterior border of the sacrum, regardless of whether the fractured ilium involves the sacroiliac joint. However, in our experience, lateral compression injury can also result from low-energy trauma as a manifestation of pelvic fragility fracture...
July 13, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28706828/accurate-positioning-of-femoral-and-tibial-tunnels-in-single-bundle-anterior-cruciate-ligament-reconstruction-using-the-indigenously-made-bernard-and-hurtle-grid-on-a-transparency-sheet-and-c-arm
#12
Sudeep Kumar, Anup Kumar, Ravi Kumar
Many factors determine the outcome of the anterior cruciate ligament reconstruction surgery. The single most important factor, also well within the control of a surgeon, is tunnel placement. It is difficult to accurately determine the center of the anterior cruciate ligament foot print, and many a times it is also difficult to accurately define the intercondylar and bifurcate ridge. This makes determination of the accurate entry point of the guidewire difficult. We have printed our indigenously formed grid (equidistant boxes) on an old-fashioned transparency sheet...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28706818/arthroscopic-repair-of-posterior-bony-bankart-lesion-and-subscapularis-remplissage
#13
Colten Luedke, Stefan J Tolan, John M Tokish
Posterior shoulder instability with glenoid bone loss has only a fraction of the prevalence of anterior instability. Unlike the latter, there is a paucity of literature regarding the treatment of posterior bony Bankart lesions and even less with concomitant reverse Hill-Sachs lesions. This combination of pathology leads to a difficult situation regarding treatment options. We present our technique for arthroscopic repair of a posterior bony Bankart lesion and reverse Hill-Sachs lesion. The importance of proper portal placement cannot be overstated...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28706813/all-inside-bicruciate-ligament-reconstruction-technique-a-focus-on-graft-tensioning-sequence
#14
Mathieu Thaunat, Gilles Clowez, Colin G Murphy, Antoine Desseaux, Tales Guimaraes, Jean Marie Fayard, Bertrand Sonnery-Cottet
Bicruciate ligament (BCL) reconstructions are challenging procedures. One of the main operative goals is to stabilize the knee in the correct anterior-posterior position. We present an all-inside arthroscopic BCL reconstruction technique using hamstring tendon grafts. Ipsilateral semitendinosus (ST) and gracilis tendons are used for TriLink (Arthrex, Naples, FL) double-bundle posterior cruciate ligament (PCL) reconstruction and contralateral ST tendon is used for GraftLink (Arthrex) single-bundle anterior cruciate ligament (ACL) reconstruction...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28706802/medial-meniscus-posterior-root-tear-repair-using-a-2-simple-suture-pullout-technique
#15
Tarek Mohamed Samy, Wael A M Nassar, Zeiad Mohamed Zakaria, Ahmed Khaled Farrag Abdelaziz
Medial meniscus posterior root tear is one of the underestimated knee injuries in terms of incidence. Despite its grave sequelae, using simple but effective technique can maintain the native knee joint longevity. In the current note, a 2-simple-suture pullout technique was used to effectively reduce the meniscus posterior root to its anatomic position. The success of the technique depended on proper tool selection as well as tibial tunnel direction that allowed easier root suturing and better suture tensioning, without inducing any iatrogenic articular cartilage injury or meniscal tissue loss...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28706317/deladenus-posteroporus-n-sp-nematoda-neotylenchidae-isolated-from-packaging-wood-from-canada-and-white-pine-pinus-monticola-lumber-from-the-united-states-and-intercepted-in-ningbo-china
#16
Qing Yu, Jianfeng Gu, Weimin Ye, Rusong Li, Jie He
Deladenus posteroporus n. sp. isolated from packaging wood originated from Canada and from white pine lumber from the United States, both intercepted in the port of Ningbo, China, is described and illustrated. Both mycetophagous and infective forms were recovered from the Canadian sample, whereas only the mycetophagous form was found in the U.S. SAMPLE: The new species is characterized by the posteriorly positioned excretory pore relative to the hemizonid in both mycetophagous and infective forms, by a broadly rounded tail end in mycetophagous females and lateral fields with 11 to 12 lines midbody in both mycetophagous females and males...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28702886/comparison-of-transvaginal-sonography-and-computed-tomography-colonography-with-contrast-media-and-urographic-phase-for-diagnosing-deep-infiltrating-endometriosis-of-the-posterior-compartment-of-the-pelvis-a-pilot-study
#17
Letizia Zannoni, Simona Del Forno, Francesca Coppola, Dimitris Papadopoulos, Domenico Valerio, Rita Golfieri, Giacomo Caprara, Roberto Paradisi, Renato Seracchioli
PURPOSE: To compare the diagnostic accuracy of transvaginal sonography (TVS) and computed tomography-colonography with contrast media and urographic phase (CTCU) in the preoperative detection of deep infiltrating endometriosis (DIE). MATERIALS AND METHODS: Forty-seven patients with clinical suspicion of DIE underwent preoperative TVS and CTCU. Imaging data were compared with histopathologic analysis. Sensitivity, specificity, positive and negative predictive values and test accuracies of the two modalities were calculated...
July 12, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28701341/computer-simulations-reveal-mechanisms-that-organize-nuclear-dynein-forces-to-separate-centrosomes
#18
Alessandro De Simone, Pierre Gönczy
Centrosome separation along the surface of the nucleus at the onset of mitosis is critical for bipolar spindle assembly. Dynein anchored on the nuclear envelope is known to be important for centrosome separation, but it is unclear how nuclear dynein forces are organized in an anisotropic manner to promote the movement of centrosomes away from each other. Here, we use computational simulations of C. elegans embryos to address this fundamental question, testing three potential mechanisms by which nuclear dynein may act...
July 12, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28701225/association-of-schizophrenia-onset-age-and-white-matter-integrity-with-treatment-effect-of-d-cycloserine-a-randomized-placebo-controlled-double-blind-crossover-study
#19
Kazuo Takiguchi, Akihito Uezato, Michio Itasaka, Hidenori Atsuta, Kenji Narushima, Naoki Yamamoto, Akeo Kurumaji, Makoto Tomita, Kazunari Oshima, Kosaku Shoda, Mai Tamaru, Masahito Nakataki, Mitsutoshi Okazaki, Sayuri Ishiwata, Yasuyoshi Ishiwata, Masato Yasuhara, Kunimasa Arima, Tetsuro Ohmori, Toru Nishikawa
BACKGROUND: It has been reported that drugs which promote the N-Methyl-D-aspartate-type glutamate receptor function by stimulating the glycine modulatory site in the receptor improve negative symptoms and cognitive dysfunction in schizophrenia patients being treated with antipsychotic drugs. METHODS: We performed a placebo-controlled double-blind crossover study involving 41 schizophrenia patients in which D-cycloserine 50 mg/day was added-on, and the influence of the onset age and association with white matter integrity on MR diffusion tensor imaging were investigated for the first time...
July 12, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28700819/posterior-dopamine-d2-3-receptors-and-brain-network-functional-connectivity
#20
Atsuko Nagano-Saito, Jennifer I Lissemore, Paul Gravel, Marco Leyton, Felix Carbonell, Chawki Benkelfat
Recent studies suggest that dopaminergic tone influences resting state activity in multiple brain networks. Although dopamine receptors and transporters have been identified in the posteromedial and parietal cortices, which are linked to functional networks such as the default mode network (DMN), the relationship between dopamine receptor distribution in these posterior regions and resting-state connectivity has yet to be explored. Here, we used a multi-modal neuroimaging strategy, combining resting-state functional magnetic resonance imaging (rsfMRI) and [18F]-fallypride high-resolution positron emission tomography (PET), to examine the association between within-network functional connectivity and the dopamine D2/3 receptor distribution in the posterior portion of the brain in 13 healthy adults...
July 12, 2017: Synapse
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