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https://www.readbyqxmd.com/read/29346832/diagnosis-of-lumbar-spinal-stenosis-with-functional-myelography
#1
Matthias Morgalla, Sandra Frantz, Roberto Alexandre Dezena, Carlos Umberto Pereira, Marcos Tatagiba
BACKGROUND AND STUDY AIMS:  The diagnosis of a lumbar spinal stenosis demands advanced diagnostic radiologic techniques. In recent decades magnetic resonance imaging (MRI) has replaced myelography, now considered an old-fashioned technique. It was our hypothesis that functional myelography still plays an important role in selected cases. We investigated how our surgical strategy was influenced by the results of MRI, functional myelography, and postmyelography computed tomography (CT) in patients with a lumbar spinal stenosis...
January 18, 2018: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/29346398/dual-function-of-edta-with-silver-nanoparticles-for-root-canal-treatment-a-novel-modification
#2
Juan M Martinez-Andrade, Miguel Avalos-Borja, Alfredo R Vilchis-Nestor, Luis O Sanchez-Vargas, Ernestina Castro-Longoria
The chelating and antimicrobial capacity of a novel modification of 17% EDTA with silver nanoparticles (AgNPs) (EDTA-AgNPs) was evaluated in-vitro for root canal treatment (RCT). The EDTA-AgNPs solution was characterized by UV-Vis spectroscopy, ζ-potential and high-resolution transmission electron microscopy (HRTEM). Antimicrobial capacity was evaluated against Candida albicans and Staphylococcus aureus in planktonic and biofilm cells by broth macrodilution (24 h) and XTT assays, (1, 10 and 30 min) respectively...
2018: PloS One
https://www.readbyqxmd.com/read/29345723/anatomical-characteristics-of-the-lingual-foramen-in-ancient-skulls-a-cone-beam-computed-tomography-study-in-an-anatolian-population
#3
Kemal Özgür Demiralp, Seval Bayrak, Mukadder Orhan, Arzu Alan, Emine Şebnem Kurşun Çakmak, Kaan Orhan
BACKGROUND: The purpose of this study is to evaluate the anatomical features of lingual foramina and their bony canals in Anatolian ancient mandibles which belong to 9-10th century by using cone beam computed tomography (CBCT). MATERIALS AND METHODS: 58 ancient dry mandibles were scanned with CBCT. Lingual foramina were grouped into midline, paramedian, posterior foramina and combination of these groups. Midline group was also classified according to internal surface of the mandible (gonial tubercles)...
January 18, 2018: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/29345719/an-anatomical-variant-evaluation-of-accessory-canals-of-the-canalis-sinuosus-using-cbct
#4
Kaan Orhan, Cansu Gorurgoz, Mesut Akyol, Savaş Ozarslanturk, Hakan Avsever
BACKGROUND: The anatomical variation of the anterior superior alveolar nerve which described as canalis sinuosus(CS) is a less known structure of anterior maxilla. Due to it contains anterior superior alveolar nerve as well as vein and arteries, exact diagnosis will provide surgeons to avoid complications. Hence, the aim of this study was to verify the presence, reveal the frequency and characteristics of accessory canals of canalis sinuosus. MATERIAL AND METHODS: This study was based on retrospective evaluation of CBCT scans...
January 18, 2018: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/29345097/the-diagnostic-value-of-the-functional-lumen-imaging-probe-versus-high-resolution-anorectal-manometry-in-patients-with-fecal-incontinence
#5
A M Leroi, C Melchior, C Charpentier, V Bridoux, C Savoye-Collet, E Houivet, P Ducrotté, G Gourcerol
BACKGROUND: The functional lumen imaging probe (EndoFLIP® ) is a new technology that measures the distensibility of the anal canal represented by the anal distensibility index. The aims of this study were (i) to compare the anal distensibility index to anal pressure in a cohort of patients with fecal incontinence (FI) and (ii) to compare the diagnostic value of the EndoFLIP® to that of high-resolution anorectal manometry (HRAM) in the same cohort of patients. METHODS: Eighty-three consecutive patients with FI who underwent EndoFLIP® and HRAM assessments were enrolled...
January 18, 2018: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29345019/a-vascular-mechanism-to-explain-thermally-mediated-variations-in-deep-body-cooling-rates-during-the-immersion-of-profoundly-hyperthermic-individuals
#6
Joanne N Caldwell, Anne M J van den Heuvel, Pete Kerry, Mitchell J Clark, Gregory E Peoples, Nigel A S Taylor
Physiologically trivial time differences for cooling the intrathoracic viscera of hyperthermic individuals have been reported between cold- and temperate-water immersion treatments. One explanation for that observation is reduced convective heat delivery to the skin during cold immersion, and this experiment was designed to test both the validity of that observation, and its underlying hypothesis. Eight healthy males participated in four head-out, water immersions: two when normothermic, and two following exercise-induced, moderate-profound hyperthermia...
January 18, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29344806/comparison-of-two-observational-methods-scanning-electron-and-confocal-laser-scanning-microscopies-in-the-adhesive-interface-analysis-of-endodontic-sealers-to-root-dentine
#7
Maybell Tedesco, Marcelo Carvalho Chain, Eduardo Antunes Bortoluzzi, Lucas da Fonseca Roberti Garcia, Ana Maria Hecke Alves, Cleonice Silveira Teixeira
OBJECTIVES: To compare the accuracy of confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM) during the analysis of the adhesive interface integrity and intratubular penetration of root canal sealers to radicular dentine. MATERIALS AND METHODS: Twenty roots of human maxillary incisors were prepared and distributed into two groups (n = 10), followed by filling with gutta-percha and Endofill (G1) or AH Plus (G2). After 7 days, roots were sectioned and analyzed under CLSM and SEM...
January 17, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29344679/distribution-and-dynamic-expression-of-serotonin-and-dopamine-in-the-nervous-system-and-ovary-of-holothuria-scabra-during-ovarian-maturation
#8
Arada Chaiyamoon, Ruchanok Tinikul, Supakant Chaichotranunt, Tanes Poomthong, Worawit Suphamungmee, Prasert Sobhon, Yotsawan Tinikul
In the present study, the distribution and dynamic expression of serotonin and dopamine in the nervous system and ovary of the sea cucumber, Holothuria scabra, during different ovarian stages were investigated. We found that serotonin-immunoreactivity was more intense in the neurons and neuropils of the outer ectoneural part, the inner hyponeural part, and the wall of hyponeural canal of radial nerve cord during the mature stages of ovarian cycle, whereas dopamine-immunoreactivity was detected at a higher intensity in these tissues during the early stages...
January 18, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29344072/bilateral-compressive-optic-neuropathy-from-renal-osteodystrophy-caused-by-branchio-oto-renal-syndrome-stabilised-after-parathyroidectomy
#9
Arun N E Sundaram, Archana Abhayambika, Sunil Kumar
Renal osteodystrophy can cause calvarial hypertrophy and narrowing of the neural canals and foramina. Compressive optic neuropathy is extremely rare in renal osteodystrophy and was reported once only. The authors report bilateral, simultaneous compressive optic neuropathy secondary to renal osteodystrophy with features of uremic leontiasis ossea in chronic renal failure caused by branchio-oto-renal syndrome. Because of the extensive calvarial hypertrophy and the surgical difficulties envisaged with optic canal decompression, conservative approach was pursued...
December 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/29343821/focal-hyperintensity-in-the-dorsal-brain-stem-of-patients-with-cerebellopontine-angle-tumor-a-high-resolution-3%C3%A2-t-mri-study
#10
Hirotaka Yamamoto, Atsushi Fujita, Taichiro Imahori, Takashi Sasayama, Kohkichi Hosoda, Ken-Ichi Nibu, Eiji Kohmura
Focal hyperintensity (FHI) in the dorsal brain stem on T2-weighted images of patients with cerebellopontine angle (CPA) tumor was thought to indicate degeneration of the vestibular nucleus and to be specific to vestibular schwannoma. The purpose of this study was to evaluate FHI by using high-resolution 3 Tesla magnetic resonance imaging (3 T MRI) and the relation to clinical characteristics. We retrospectively reviewed the clinical data and MRI of 45 patients with CPA tumors (34 vestibular schwannomas and 11 other tumors)...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343679/ramsay-hunt-syndrome-with-multiple-cranial-neuropathy-in-an-human-immunodeficiency-virus-hiv-patient
#11
Divya Arya, Tushar Bajaj, Jose Gonzalez, Rene Elkin
BACKGROUND Ramsay Hunt syndrome is a rare otologic complication resulting from varicella zoster virus reactivation that can present with a myriad of clinical presentations. Most common being triad of ear pain, vesicles at auricle, and ear canal with same side facial palsy. CASE REPORT We report a case of a 29-year-old male with a human immunodeficiency virus (HIV) infection who presented with left facial palsy, vesicles, pain in the left ear, dysphagia, dizziness, and headache resulting from multiple cranial nerves involvement such as cranial nerve V, VII, VIII, IX, and X...
January 18, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29343287/percutaneous-kyphoplasty-for-the-treatment-of-very-severe-osteoporotic-vertebral-compression-fractures-with-spinal-canal-compromise
#12
Heng Wang, Zongyu Zhang, Yijie Liu, Weimin Jiang
BACKGROUND: Very severe osteoporotic vertebral compression fractures (vsOVCFs) are osteoporotic vertebral compression fractures with vertebral body collapse to less than one third of their original height. Few data are available about the use of percutaneous kyphoplasty (PKP) in treating vsOVCFs with spinal canal compromise. The aim of this study was to evaluate the safety and efficacy of percutaneous kyphoplasty (PKP) for the treatment of vsOVCFs with spinal canal compromise. METHODS: Thirty-five patients who suffered vsOVCFs with spinal canal compromise but without neurological deficits were treated by PKP between January 2009 and October 2014...
January 17, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29342057/audiologic-natural-history-of-small-volume-cochleovestibular-schwannomas-in-neurofibromatosis-type-2
#13
Alvin T deTorres, Carmen C Brewer, Chris K Zalewski, Kelly A King, Robert Walker, Gretchen C Scott, Ashok R Asthagiri, Prashant Chittiboina, Hung Jeffrey Kim
OBJECTIVE: To characterize the audiometric natural progression in patient-ears with small volume (<1,000 mm), treatment-naïve cochleovestibular schwannomas (CVSs) in Neurofibromatosis Type 2 (NF2). STUDY DESIGN: Prospective, longitudinal cohort study. SETTING: Quaternary medical research institute. PATIENTS: One hundred eleven ears in 71 NF2 patients with small, treatment-naïve CVSs observed from July 2006 to July 2016...
January 16, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29342052/preauricular-approach-for-cholesteatoma-resection-after-surgical-overclosure-of-the-external-auditory-canal-and-cochlear-implantation
#14
Steven A Telian
: Chronic suppurative otitis media can have long-term effects on hearing if not managed effectively. When combined with cholesteatoma the condition may require creation of an open mastoid cavity. Recurrence of cholesteatoma is a concern when cochlear implantation is performed with overclosure of the external auditory meatus. A 61-year-old female with recurrent cholesteatoma in this setting was treated using a preauricular approach to provide adequate visualization while preventing the need to remove the implant or risking injury to the internal components...
January 16, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29342049/the-impact-of-the-transcanal-endoscopic-approach-and-mastoid-preservation-on-recurrence-of-primary-acquired-attic-cholesteatoma
#15
Livio Presutti, Lukas Anschuetz, Alessia Rubini, Marco Ruberto, Matteo Alicandri-Ciufelli, Marco Dematte, Marco Caversaccio, Daniele Marchioni
OBJECTIVE: We aim to investigate the factors associated with recurrent disease following surgery for primary acquired attic cholesteatoma. We hypothesize that minimal invasive, mucosal sparing operation techniques have beneficial effects on the outcome in terms of recurrence. STUDY DESIGN: Retrospective study. SETTING: Tertiary referral center. PARTICIPANTS: A total of 110 patients presenting with primary acquired attic cholesteatoma were enrolled in the study...
January 16, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29342047/direction-fixed-and-direction-changing-positional-nystagmus-in-ramsay-hunt-syndrome
#16
Chang-Hee Kim, Jin Woo Choi, Kyu Jin Han, Yong Sik Lee, Jung Eun Shin
OBJECTIVES: To investigate the incidence of positional nystagmus (PN) using a head-roll test in patients with Ramsay Hunt syndrome with vertigo (RHS_V) and discuss possible mechanisms. STUDY DESIGN: Retrospective study. SETTING: Tertiary referral academic medical center. PATIENTS: Twenty-eight patients with RHS_V were enrolled. MAIN OUTCOME MEASURE: Eye movements were recorded at positions of head roll to the right or left, and PN was classified as direction-fixed or direction-changing...
January 16, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29341976/cone-beam-ct-assessment-of-the-position-of-the-medial-lingual-foramen-for-dental-implant-placement-in-the-anterior-symphysis
#17
Arturo Sanchez-Perez, Paula Boix-Garcia, Pía Lopez-Jornet
OBJECTIVES: To determine the position of the mandibular medial lingual foramen with cone-beam CT (CBCT) 3D imaging modalities when implants are to be placed in the anterior symphysis of the mandible. MATERIALS AND METHODS: A total of 111 CBCTs were considered acceptable and analyzed. The variables measured were as follows: (1) length of the outlet duct; (2) distance from the canal to the buccal cortex; (3) distance from the canal to the inferior cortex; (4) distance from the canal to the lingual cortex; (5) distance from the canal to the alveoli of the nearest tooth in dentate patients and distance from the canal to the marginal crest in edentulous patients; (6) angle of the duct to the horizontal Frankfurt plane; (7) diameter of the exit orifice; and (8) output level of the socket in relation to the teeth and the presence of bifurcations...
January 16, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29341006/mapping-functional-connectivity-in-the-rodent-brain-using-electric-stimulation-fmri
#18
Laura Pérez-Cervera, José María Caramés, Luis Miguel Fernández-Mollá, Andrea Moreno, Begoña Fernández, Elena Pérez-Montoyo, David Moratal, Santiago Canals, Jesús Pacheco-Torres
Since its discovery in the early 90s, BOLD signal-based functional Magnetic Resonance Imaging (fMRI) has become a fundamental technique for the study of brain activity in basic and clinical research. Functional MRI signals provide an indirect but robust and quantitative readout of brain activity through the tight coupling between cerebral blood flow and neuronal activation, the so-called neurovascular coupling. Combined with experimental techniques only available in animal models, such as intracerebral micro-stimulation, optogenetics or pharmacogenetics, provides a powerful framework to investigate the impact of specific circuit manipulations on overall brain dynamics...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29340993/laparoscopic-assisted-modified-intersphincter-resection-for-ultralow-rectal-cancer
#19
Haiyang Zhou, Canping Ruan, Zhiguo Wang, Zhiqian Hu
BACKGROUND: Intersphincter resection (ISR) is considered to be a superior technique offering sphincter preservation in patients with ultralow rectal cancer.1 Because high-definition laparoscopy offers wider and clearer vision into the narrow pelvic cavity and intersphincteric space, ISR has been further refined.2 However, functional outcome after ISR has not been optimal. More than half of patients receiving ISR suffer partial or even complete anal incontinence.3 We therefore propose a laparoscopic-assisted modified ISR, with the aim of improving sphincter function following ISR...
January 16, 2018: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29340754/preoperative-evaluation-of-cochlear-implantation-through-the-round-window-membrane-in-the-facial-recess-using-high-resolution-computed-tomography
#20
Li-Hong Xie, Jie Tang, Wen-Jie Miao, Xiang-Long Tang, Heng Li, An-Zhou Tang
PURPOSE: We evaluated the risk of cochlear implantation through the round window membrane in the facial recess through a preoperative analysis of the angle between the facial nerve-round window and the cranial midline using high-resolution temporal bone CT. METHODS: Temporal bone CT films of 176 patients with profound sensorineural hearing loss at our hospital from 2013 to 2015 were reviewed. The preoperative temporal bone CT scans of the patients were retrospectively analysed...
January 16, 2018: Surgical and Radiologic Anatomy: SRA
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