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https://www.readbyqxmd.com/read/28088226/use-of-an-intraoperative-navigation-system-for-retrieving-a-broken-dental-instrument-in-the-mandible-a-case-report
#1
Shintaro Sukegawa, Takahiro Kanno, Akane Shibata, Kenichi Matsumoto, Yuka Sukegawa-Takahashi, Kyosuke Sakaida, Yoshihiko Furuki
BACKGROUND: A fracture of root canal instruments, with a fractured piece protruding beyond the apex, is a troublesome incident during an endodontic treatment. Locating and retrieving them represents a challenge to maxillofacial surgeons because it is difficult to access due to the proximity between the foreign body and vital structures. Although safe and accurate for surgery, radiographs and electromagnetic devices do not provide a precise three-dimensional position. In contrast, computer-aided navigation provides a correlation between preoperatively collected data and intraoperatively encountered anatomy...
January 15, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28087417/culture-media-based-selection-of-endothelial-cells-pericytes-and-perivascular-resident-macrophage-like-melanocytes-from-the-young-mouse-vestibular-system
#2
Jinhui Zhang, Songlin Chen, Jing Cai, Zhiqiang Hou, Xiaohan Wang, Allan Kachelmeier, Xiaorui Shi
The vestibular blood-labyrinth barrier (BLB) is comprised of perivascular-resident macrophage-like melanocytes (PVM/Ms) and pericytes (PCs), in addition to endothelial cells (ECs) and basement membrane (BM), and bears strong resemblance to the cochlear BLB in the stria vascularis. Over the past few decades, in vitro cell-based models have been widely used in blood-brain barrier (BBB) and blood-retina barrier (BRB) research, and have proved to be powerful tools for studying cell-cell interactions in their respective organs...
January 10, 2017: Hearing Research
https://www.readbyqxmd.com/read/28087416/the-path-of-a-click-stimulus-from-ear-canal-to-umbo
#3
Mario Milazzo, Elika Fallah, Michael Carapezza, Nina S Kumar, Jason H Lei, Elizabeth S Olson
The tympanic membrane (TM) has a key role in transmitting sounds to the inner ear, but a concise description of how the TM performs this function remains elusive. This paper probes TM operation by applying a free field click stimulus to the gerbil ear and exploring the consequent motions of the TM and umbo. Motions of the TM were measured both on radial tracks starting close to the umbo and on a grid distal and adjacent to the umbo. The experimental results confirmed the high fidelity of sound transmission from the ear canal to the umbo...
January 10, 2017: Hearing Research
https://www.readbyqxmd.com/read/28087395/lumbar-spinal-muscles-and-spinal-canal-study-by-mri-three-dimensional-reconstruction-in-adult-lumbar-spinal-stenosis
#4
Louis Boissière, Bertrand Moal, Olivier Gille, Elise De-Roquefeuil, Muriel Durieux, Ibrahim Obeid, Vincent Dousset, Jean-Marc Vital, Wafa Skalli
BACKGROUND: Lumbar spinal stenosis is degenerative disc disease most common manifestation. If stenosis degree seems poorly related to symptom severity, lumbar muscles role is recognized. Many studies report imaging methods, to analyze muscle volumes and fat infiltration (FI), but remain limited due to the difficulty to represent entire muscle volume variability. Recently a 3D muscle reconstruction protocol (using the deformation of a parametric specific object method (DPSO) and three point Dixon images) was reported...
January 10, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28081534/enhanced-auditory-sensitivity-to-body-vibrations-in-superior-canal-dehiscence-syndrome
#5
Krister Brantberg, Luca Verrecchia, Magnus Westin
A key feature of superior canal dehiscence (SCD) syndrome is supranormal hearing of body sounds. The aim of the present study was to quantify this phenomenon and to ascertain whether auditory sensitivity to body vibrations can distinguish SCD patients. Hearing thresholds in response to vibration at the vertex, at the spinous process of the 7th cervical vertebra, and at the medial malleolus were tested in 10 SCD patients and 10 controls. Both patients and controls had insert earphones in both ears. The insert in the test ear was blocked while masking was presented to the other ear...
January 13, 2017: Audiology & Neuro-otology
https://www.readbyqxmd.com/read/28080907/unsedated-computed-tomography-for-diagnosis-of-pelvic-canal-obstruction-in-a-leopard-gecko-eublepharis-macularius
#6
Kelly DeCourcy, Eric T Hostnik, Josh Lorbach, Sue Knoblaugh
An adult leopard gecko ( Eublepharis macularius ) presented for lethargy, hyporexia, weight loss, decreased passage of waste, and a palpable caudal coelomic mass. Computed tomography showed a heterogeneous hyperattenuating (∼143 Hounsfield units) structure within the right caudal coelom. The distal colon-coprodeum lumen or urinary bladder was hypothesized as the most likely location for the heterogeneous structure. Medical support consisted of warm water and lubricant enema, as well as a heated environment...
December 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28079678/sound-localization-in-patients-with-congential-unilateral-conductive-hearing-loss-with-a-transcutaneous-bone-conduction-implant
#7
Erich Vyskocil, Rudolfs Liepins, Alexandra Kaider, Michaela Blineder, Sasan Hamzavi
OBJECTIVE: There is no consensus regarding the benefit of implantable hearing aids in congenital unilateral conductive hearing loss (UCHL). This study aimed to measure sound source localization performance in patients with congenital UCHL and contralateral normal hearing who received a new bone conduction implant. STUDY DESIGN: Evaluation of within-subject performance differences for sound source localization in a horizontal plane. SETTING: Tertiary referral center...
January 10, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28079677/cadaveric-testing-of-robot-assisted-access-to-the-internal-auditory-canal-for-vestibular-schwannoma-removal
#8
Neal P Dillon, Ramya Balachandran, Michael A Siebold, Robert J Webster, George B Wanna, Robert F Labadie
HYPOTHESIS: An image-guided robotic system can safely perform the bulk removal of bone during the translabyrinthine approach to vestibular schwannoma (VS). BACKGROUND: The translabyrinthine approach to VS removal involves extensive manual milling in the temporal bone to gain access to the internal auditory canal (IAC) for tumor resection. This bone removal is time consuming and challenging due to the presence of vital anatomy (e.g., facial nerve) embedded within the temporal bone...
January 10, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28079655/microarchitecture-of-schlemm-canal-before-and-after-selective-laser-trabeculoplasty-in-enhanced-depth-imaging-optical-coherence-tomography
#9
Alon Skaat, Michael S Rosman, Jason L Chien, Mark P Ghassibi, Jeffrey M Liebmann, Robert Ritch, Sung Chul Park
PURPOSE: To characterize the in vivo effect of selective laser trabeculoplasty (SLT) on the Schlemm canal (SC) in eyes with primary open-angle glaucoma (POAG). MATERIALS AND METHODS: Eighty-one serial horizontal enhanced depth imaging optical coherence tomograph B-scans (interval between B-scans, ∼35 μm) of the nasal corneoscleral limbus were obtained before and 4 weeks after SLT. Fifty B-scans in the overlapping regions before and after SLT were selected for analysis based on the structures of aqueous and blood vessels as landmarks...
January 10, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28079309/bioactive-injectable-aggregates-with-nanofibrous-microspheres-and-human-dental-pulp-stem-cells-a-translational-strategy-in-dental-endodontics
#10
I Garzón, M A Martin-Piedra, V Carriel, M Alaminos, X Liu, R D Souza
Regeneration of the pulp-dentin complex with stem cells is a potential alternative to conventional root canal treatments. Human dental pulp stem cells (hDPSCs) have been extensively studied because of their ability to proliferate and differentiate into mineralized dental and nondental tissues. In this work we combined hDPSCs with two types of injectable poly-L-lactic acid (PLLA) microspheres with a nanofibrous or smooth surface to form bioactive injectable aggregates, and examined their ability to promote pulp regeneration in the root canal in an in vivo model...
January 12, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28079176/adductor-canal-block-versus-femoral-nerve-block-for-total-knee-arthroplasty-a-meta-analysis-of-randomized-controlled-trials
#11
Duan Wang, Yang Yang, Qi Li, Shen-Li Tang, Wei-Nan Zeng, Jin Xu, Tian-Hang Xie, Fu-Xing Pei, Liu Yang, Ling-Li Li, Zong-Ke Zhou
Femoral nerve blocks (FNB) can provide effective pain relief but result in quadriceps weakness with increased risk of falls following total knee arthroplasty (TKA). Adductor canal block (ACB) is a relatively new alternative providing pure sensory blockade with minimal effect on quadriceps strength. The meta-analysis was designed to evaluate whether ACB exhibited better outcomes with respect to quadriceps strength, pain control, ambulation ability, and complications. PubMed, Embase, Web of Science, Wan Fang, China National Knowledge Internet (CNKI) and the Cochrane Database were searched for RCTs comparing ACB with FNB after TKAs...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28079115/kidney-stones
#12
Saeed R Khan, Margaret S Pearle, William G Robertson, Giovanni Gambaro, Benjamin K Canales, Steeve Doizi, Olivier Traxer, Hans-Göran Tiselius
No abstract text is available yet for this article.
January 12, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28078834/magnetic-resonance-imaging-findings-of-patients-with-suspected-tuberculosis-from-a-tertiary-care-centre-in-sri-lanka
#13
A S Pallewatte, N A Wickramasinghe
Introduction: Spinal tuberculosis (TB) is a relatively common cause for spinal pathology in Sri Lanka and a common indication for magnetic resonance imaging (MRI). Objectives: The objective of the study was to describe the MRI imaging pattern of spinal TB in a series of patients. Methods: One hundred and nine patients with clinically confirmed spinal tuberculosis who had undergone MRI scans at the National Hospital of Sri Lanka from 2012-2016 were included in the study...
30, 2016: Ceylon Medical Journal
https://www.readbyqxmd.com/read/28078133/successful-hepatectomy-for-metastatic-squamous-cell-carcinoma-of-the-anal-canal-a-case-report
#14
Tercia Tarciane Sousa, Bruna do Nascimento Santos, Marcos Belotto, Renata D'Alpino Peixoto
Despite rare, metastatic anal carcinoma confers a poor prognosis. Systemic chemotherapy is the mainstay of treatment for advanced disease while the role of biologics and/or surgical resection of metastatic disease are anecdotal. Compared to isolated liver colorectal or neuroendocrine cancer liver metastases, there is far less experience with resection or nonsurgical local ablative procedures for patients with metastatic anal carcinoma to the liver. We report the case of a 67-year-old woman with metastatic anal carcinoma to the liver who was successfully treated with liver resection and remains free of relapse more than one year later...
December 2016: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28077902/the-length-of-the-greater-palatine-canal-in-a-lebanese-population-a-radio-anatomical-study
#15
Georges Aoun, Ibrahim Nasseh
OBJECTIVE: The aim of this study was to evaluate the length of the greater palatine canal in a Lebanese population using cone-beam computed tomography (CBCT) technology. MATERIAL AND METHODS: In this study, we measured the length of 148 greater palatine canals in 74 CBCT images of Lebanese adult patients (38 females and 36 males). The data obtained was analyzed statistically to determine 1) if age is related to the length of the canal, 2) if the length of the left side tends to be systematically larger or smaller than the length of the right side, and 3) if the mean length of the canals in females is different than the one in males...
December 2016: Acta Informatica Medica: AIM
https://www.readbyqxmd.com/read/28077712/changes-in-properties-of-auditory-nerve-synapses-following-conductive-hearing-loss
#16
Xiaowen Zhuang, Wei Sun, Matthew A Xu-Friedman
: Auditory activity plays an important role in the development of the auditory system. Decreased activity can result from conductive hearing loss (CHL) associated with otitis media, which may lead to long-term perceptual deficits. The effects of CHL have been mainly studied at later stages of the auditory pathway, but early stages remain less examined. However, changes in early stages could be important because they would affect how information about sounds is conveyed to higher-order areas for further processing and localization...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28076466/ozone-therapy-as-an-adjuvant-for-endondontic-protocols-microbiological-ex-vivo-study-and-citotoxicity-analyses
#17
Carlos Goes Nogales, Marina Beloti Ferreira, Antonio Fernando Montemor, Maria Filomena de Andrade Rodrigues, José Luiz Lage-Marques, João Humberto Antoniazzi
Objectives: This study evaluated the antimicrobial efficacy of ozone therapy in teeth contaminated with Pseudomonas aeruginosa, Enterococcus faecalis, and Staphylococcus aureus using a mono-species biofilm model. Parallel to this, the study aimed to evaluate the cytotoxicity of ozone for human gingival fibroblasts. Material and Methods: One hundred and eighty single-root teeth were contaminated with a mono-species biofilm of Enterococcus faecalis, Pseudomonas aeruginosa, and Staphylococcus aureus...
November 2016: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28076461/an-in-vitro-evaluation-of-various-irrigation-techniques-for-the-removal-of-double-antibiotic-paste-from-root-canal-surfaces
#18
Hakan Gokturk, Ismail Ozkocak, Fevzi Buyukgebiz, Osman Demir
Objective: The aim of this study was to investigate the effectiveness of conventional syringe irrigations, passive ultrasonic irrigation (PUI), Vibringe, CanalBrush, XP-endo Finisher, and laser-activated irrigation (LAI) systems in removing double antibiotic paste (DAP) from root canals. Material and Methods: One hundred five extracted single-rooted teeth were instrumented. The roots were split longitudinally. Three standard grooves were created and covered with DAP...
November 2016: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28076457/removal-of-calcium-hydroxide-from-weine-type-ii-systems-using-photon-induced-photoacoustic-streaming-passive-ultrasonic-and-needle-irrigation-a-microcomputed-tomography-study
#19
Adam Lloyd, Geraldine Navarrete, Melissa Andreia Marchesan, David Clement
Objective: This study compared the effectiveness of Er:YAG laser-activated irrigation (PIPS), passive ultrasonic irrigation (PUI) with EndoUltra and standard needle irrigation (SNI) in the removal of calcium hydroxide [Ca(OH)2] from the mesial roots of Weine Type II mandibular molars. Material and Methods: Thirty mandibular molars were screened by µCT for the presence of mesial roots with complex intra-canal anatomy and a common apical foramen. The teeth were enlarged to a standardized 25/...
November 2016: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28075401/anti-neuroblastoma-properties-of-a-recombinant-sunflower-lectin
#20
Marcela Pinedo, Melanie Genoula, María Ximena Silveyra, André De Oliveira Carvalho, Mariana Regente, Marianela Del Río, Júlia Ribeiro Soares, Valdirene Moreira Gomes, Laura De La Canal
According to their sugar recognition specificity, plant lectins are proposed as bioactive proteins with potential in cancer treatment and diagnosis. Helja is a mannose-specific jacalin-like lectin from sunflower which was shown to inhibit the growth of certain fungi. Here, we report its recombinant expression in a prokaryotic system and its activity in neurobalstoma cells. Helja coding sequence was fused to the pET-32 EK/LIC, the enterokinase/Ligation-independent cloning vector and a 35 kDa protein was obtained in Escherichia coli representing Helja coupled to thioredoxin (Trx)...
January 10, 2017: International Journal of Molecular Sciences
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