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https://www.readbyqxmd.com/read/29161549/ultrasound-guided-versus-conventional-injection-for-caudal-block-in-children-a-prospective-randomized-clinical-study
#1
Ali Ahiskalioglu, Ahmet Murat Yayik, Elif Oral Ahiskalioglu, Mursel Ekinci, Birzat Emre Gölboyu, Erkan Cem Celik, Haci Ahmet Alici, Akgun Oral, Saban Oguz Demirdogen
STUDY OBJECTIVE: The aim of this study was to compare the efficacies of ultrasound guided sacral hiatus injection and conventional sacral canal injection performed for caudal block in children. DESIGN: Randomized controlled clinical trial. SETTING: Operating rooms of university hospital of Erzurum, Turkey. PATIENTS: One hundred-thirty four children, American Society of Anesthesiologists I-II, between the ages of 5 and 12, scheduled for elective phimosis and circumcision surgery...
November 18, 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/29160804/residual-endodontic-filling-material-after-post-space-preparation-a-confocal-microscopic-study
#2
Yu-Yao Teoh, Laurence J Walsh
This laboratory study assessed removability of endodontic alkaline cements and resin sealers using coronal cross-sectional slices of roots with single canals. Materials were labelled with 0.1% (w/w) sodium fluorescein prior to mixing so that confocal microscopy could be used to quantify material remaining on the walls of post spaces, to assess cleanliness. Roots of extracted teeth were prepared using rotary NiTi instruments then obturated using lateral condensation with gutta percha and epoxy resin sealers (AH-Plus™ or Zirmix™), or were filled by injecting mineral trioxide aggregate (MTA) cement (GC Nex™ MTA or MTAmix™) or a hard-setting calcium hydroxide cement (Supercal™)...
November 21, 2017: Materials
https://www.readbyqxmd.com/read/29160398/topographic-and-chemical-analysis-of-reciprocating-and-rotary-instruments-surface-after-continuous-use
#3
Mariana Mena Barreto Bastos, Aida Rene Assayag Hanan, Ana Mena Barreto Bastos, André Augusto Franco Marques, Lucas da Fonseca Roberti Garcia, Emílio Carlos Sponchiado
This study aimed at evaluating the changes in surface characteristics and NiTi content of reciprocating and rotary instruments after continuous use. Thirty brand-new instruments were assigned to 3 groups (n=10): PNX1 Group - ProTaper Next system - instrument X1; PNX2 Group - ProTaper Next system - instrument X2 and WO Group - WaveOne system - Primary instrument 25.08. The instruments were used to prepare 60 simulated root canals. Analysis of surface characteristics by scanning electron microscopy (SEM) and chemical analysis of Ni and Ti content by energy-dispersive spectroscopy (EDS) were performed before and after the first and third use of the instruments...
July 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29160397/mechanical-preparation-showed-superior-shaping-ability-than-manual-technique-in-primary-molars-a-micro-computed-tomography-study
#4
Lídia Regina da Costa Hidalgo, Léa Assed Bezerra da Silva, Graziela Bianchi Leoni, Jardel Francisco Mazzi-Chaves, Emily Eduardo da Silva Carvalho, Alberto Consolaro, Manoel Damião Sousa-Neto
The aim of the study was to evaluate canal preparation in primary molars with hand files, ProTaper Next and Self-Adjusting File (SAF) by 2D and 3D micro-computed tomography (micro-CT) analysis. Canals of 24 primary molars were prepared with hand files (HF), ProTaper Next (PTN) and SAF (n=8/group). The teeth were scanned before and after root canal preparation and the pre- and postoperative micro-CT images were reconstructed. Changes in 2D (area, perimeter, roundness, minor and major diameter) and 3D [volume, surface area, structure model index (SMI)] morphological parameters, as well as canal transportation and lateral perforations were evaluated (Kruskal-Wallis and ANOVA; a=0...
July 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29160396/effect-of-intermediate-flush-using-different-devices-to-prevent-chemical-smear-layer-formation
#5
Camilla Corrêa Silva, Vivian Maria Durange Ferreira, Gustavo De-Deus, Daniel Rodrigo Herrera, Maíra do Prado, Emmanuel João Nogueira Leal da Silva
This study compared the effect of intermediate flush with distilled water delivered by conventional irrigation, EndoVac microcannula or Self-Adjusting File (SAF) system in the prevention of chemical smear layer (CSL) formation. Thirty human premolars were used. Canals were prepared with Reciproc system and 5.25% NaOCl. After chemomechanical preparation, samples were divided in 3 groups (n=10) according to the intermediate irrigation protocol with distilled water using: conventional irrigation, EndoVac microcannula or SAF...
July 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29160090/two-consecutive-cases-of-persistent-stapedial-artery-managed-with-a-carbon-dioxide-laser
#6
Shawn M Stevens, Zoe A Walters, Kareem Tawfik, Ravi N Samy
OBJECTIVE: (1) Discuss the presentation and management of persistent stapedial artery (PSA) discovered incidentally during cholesteatoma surgery. (2) Review use of carbon dioxide (CO2) laser for treatment of PSA in the setting of chronic ear disease. PATIENTS: Two consecutive patients with PSA and primary acquired cholesteatoma. INTERVENTION(S): Tympanomastoidectomy using a canal wall reconstruction technique. MAIN OUTCOME MEASURE(S): Surgical healing, collateral damage to surrounding anatomy, and postoperative hearing...
November 1, 2017: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/29159837/protein-structure-modeling-and-refinement-by-global-optimization-in-casp12
#7
Seung Hwan Hong, InSuk Joung, Jose C Flores-Canales, Balachandran Manavalan, Qianyi Cheng, Seungryong Heo, Jong Yun Kim, Sun Young Lee, Mikyung Nam, Keehyoung Joo, In-Ho Lee, Sung Jong Lee, Jooyoung Lee
For protein structure modeling in the CASP12 experiment, we have developed a new protocol based on our previous CASP11 approach. The global optimization method of conformational space annealing (CSA) was applied to three stages of modeling: multiple sequence-structure alignment, three-dimensional (3D) chain building, and side-chain re-modeling. For better template selection and model selection, we updated our model quality assessment (QA) method with the newly developed SVMQA (support vector machine for quality assessment)...
November 21, 2017: Proteins
https://www.readbyqxmd.com/read/29159663/infrapatellar-vs-suprapatellar-approach-to-obtain-an-optimal-insertion-angle-for-intramedullary-nailing-of-tibial-fractures
#8
Joerg Franke, Annika Homeier, Lars Metz, Thilo Wedel, Volker Alt, Sven Spät, Bernd Hohendorff, Reinhard Schnettler
BACKGROUND: During intramedullary nailing of tibial fractures, the insertion angle of the nail is of great importance. When the nail impacts the posterior cortex due to a large insertion angle with a dorsal target course, higher insertion forces are needed, and the danger of iatrogenic fractures increases. Accordingly, the insertion direction should be as parallel as possible to the longitudinal axis of the tibia. We aimed to confirm the hypothesis that intramedullary nailing of tibial fractures can be performed with smaller insertion angles via a suprapatellar approach rather than infrapatellar approach...
November 20, 2017: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/29157842/femoral-intertrochanteric-nail-fitn-a-new-short-version-design-with-an-anterior-curvature-and-a-geometric-match-study-using-post-operative-radiographs
#9
Shi-Min Chang, Sun-Jun Hu, Zhuo Ma, Shou-Chao Du, Ying-Qi Zhang
OBJECTIVE: Femoral intertrochanteric fractures are usually fixed with short, straight cephalomedullary nails. However, mismatches between the nail and the femur frequently occur, such as tip impingement and tail protrusion. The authors designed a new type of short femoral intertrochanteric nail (fitn) with an anterior curvature (length=19.5cm, r=120cm) and herein report the geometric match study for the first of 50 cases. METHODS: A prospective case series of 50 geriatric patients suffering from unstable intertrochanteric fractures (AO/OTA 31 A2/3) were treated...
November 17, 2017: Injury
https://www.readbyqxmd.com/read/29157563/nr2f1a-balances-atrial-chamber-and-atrioventricular-canal-size-via-bmp-signaling-independent-and-dependent-mechanisms
#10
Tiffany B Duong, Padmapriyadarshini Ravisankar, Yuntao Charlie Song, Jacob T Gafranek, Ariel B Rydeen, Tracy E Dohn, Lindsey A Barske, J Gage Crump, Joshua S Waxman
Determination of appropriate chamber size is critical for normal vertebrate heart development. Although Nr2f transcription factors promote atrial maintenance and differentiation, how they determine atrial size remains unclear. Here, we demonstrate that zebrafish Nr2f1a is expressed in differentiating atrial cardiomyocytes. Zebrafish nr2f1a mutants have smaller atria due to a specific reduction in atrial cardiomyocyte (AC) number, suggesting it has similar requirements to Nr2f2 in mammals. Furthermore, the smaller atria in nr2f1a mutants are derived from distinct mechanisms that perturb AC differentiation at the chamber poles...
November 17, 2017: Developmental Biology
https://www.readbyqxmd.com/read/29157461/automated-outcome-scoring-in-a-virtual-reality-simulator-for-endodontic-surgery
#11
Myat Su Yin, Peter Haddawy, Siriwan Suebnukarn, Phattanapon Rhienmora
BACKGROUND AND OBJECTIVE: We address the problem of automated outcome assessment in a virtual reality (VR) simulator for endodontic surgery. Outcome assessment is an essential component of any system that provides formative feedback, which requires assessing the outcome, relating it to the procedure, and communicating in a language natural to dental students. This study takes a first step toward automated generation of such comprehensive feedback. METHODS: Virtual reference templates are computed based on tooth anatomy and the outcome is assessed with a 3D score cube volume which consists of voxel-level non-linear weighted scores based on the templates...
January 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29156494/comparative-analysis-of-vestibular-ecomorphology-in-birds
#12
Roger B J Benson, Ethan Starmer-Jones, Roger A Close, Stig A Walsh
The bony labyrinth of vertebrates houses the semicircular canals. These sense rotational accelerations of the head and play an essential role in gaze stabilisation during locomotion. The sizes and shapes of the semicircular canals have hypothesised relationships to agility and locomotory modes in many groups, including birds, and a burgeoning palaeontological literature seeks to make ecological interpretations from the morphology of the labyrinth in extinct species. Rigorous tests of form-function relationships for the vestibular system are required to support these interpretations...
December 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29155815/allopurinol-attenuates-acute-kidney-injury-following-bothrops-jararaca-envenomation
#13
Pedro Henrique França Gois, Monique Silva Martines, Daniela Ferreira, Rildo Volpini, Daniele Canale, Ceila Malaque, Renato Crajoinas, Adriana Castello Costa Girardi, Maria Heloisa Massola Shimizu, Antonio Carlos Seguro
Snakebites have been recognized as a neglected public health problem in several tropical and subtropical countries. Bothrops snakebites frequently complicate with acute kidney injury (AKI) with relevant morbidity and mortality. To date, the only treatment available for Bothrops envenomation is the intravenous administration of antivenom despite its several limitations. Therefore, the study of novel therapies in Bothrops envenomation is compelling. The aim of this study was to evaluate the protective effect of Allopurinol (Allo) in an experimental model of Bothrops jararaca venom (BJ)-associated AKI...
November 20, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29155744/capturing-flow-weighted-water-and-suspended-particulates-from-agricultural-canals-during-drainage-events
#14
Jehangir H Bhadha, Anne Sexton, Timothy A Lang, Samira H Daroub
The purpose of this study is to describe the methods used to capture flow-weighted water and suspended particulates from farm canals during drainage discharge events. Farm canals can be enriched by nutrients such as phosphorus (P) that are susceptible to transport. Phosphorus in the form of suspended particulates can significantly contribute to the overall P loads in drainage water. A settling tank experiment was conducted to capture suspended particulates during discrete drainage events. Farm canal discharge water was collected in a series of two 200 L settling tanks over the entire duration of the drainage event, so as to represent a composite subsample of the water being discharged...
November 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155532/the-restorability-assessment-and-endodontic-access-cavity-interface
#15
Graham Quilligan, Gerald McKenna, P Finbarr Allen
Successful root canal treatment requires management of the bacterial infection within the root canal space and protection of residual tooth structure with direct/indirect restorations. Long-term success depends upon prevention of re-infection of the root canal space as well as ensuring favourable distribution of the occlusal forces throughout the residual tooth structure. Appropriate planning and design of the final restoration prior to initiating root canal treatment is paramount in achieving this objective...
December 2016: Dental Update
https://www.readbyqxmd.com/read/29155192/external-genital-development-urethra-formation-and-hypospadias-induction-in-guinea-pig-a-double-zipper-model-for-human-urethral-development
#16
Shanshan Wang, Mingxin Shi, Dongqing Zhu, Ranjiv Mathews, Zhengui Zheng
OBJECTIVES: To determine whether the guinea pig phallus would be an appropriate model of human penile development, we characterized the embryology and sexual differentiation of guinea pig external genitalia and attend to induce hypospadias in males and tubular urethra formation in females pharmacologically. MATERIALS AND METHODS: The external genitalia of guinea pig were collected from genital swelling initiation to newborn stages and Scanning Electronic Microscopy and histology were performed to visualize the morphology and structure...
November 16, 2017: Urology
https://www.readbyqxmd.com/read/29154999/kinematic-analysis-of-the-space-available-for-cord-and-disc-bulging-of-the-thoracic-spine-using-kinematic-magnetic-resonance-imaging-kmri
#17
Permsak Paholpak, Ishan Shah, Lou-Anne Acevedo-Moreno, Koji Tamai, Jeffrey C Wang, Zorica Buser
BACKGROUND CONTEXT: The thoracic spine was previously known as a relatively stable region in human spine. Several studies reported motion of the thoracic spine and changes in the cross-sectional area of the spinal cord changed with positions in sagittal plane. The kinematic relationship between the thoracic disc and space available for cord with the positional change is still not well investigated. PURPOSE: To evaluate the kinematic change of the intervertebral disc and space available for the spinal cord of the thoracic spine using kMRI...
November 14, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29154997/kyphoplasty-for-osteoporotic-vertebral-fractures-with-posterior-wall-injury
#18
Ahmed Shawky, Ali Ezzati, Ramachandran Govindasamy, Branko Krajnovic, Belal El-Nady, Galal Zaki Said
BACKGROUND: Cement augmentation techniques are standard treatments for osteoporotic vertebral fractures. Compared to vertebroplasty, kyphoplasty is associated with lower rates of cement leak and better deformity correction, however, posterior wall fractures are relative, but not absolute, contraindications for both techniques and hence treatment practices vary among spine centers. PURPOSE: The primary aim of this study was to assess our center's incidence of posterior cement leakage in osteoporotic vertebral fractures with posterior wall injury treated by balloon kyphoplasty...
November 14, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29154980/treatment-of-carpal-tunnel-syndrome-from-ultrasonography-to-ultrasound-surgery
#19
David Petrover, Pascal Richette
Carpal tunnel syndrome is the most common nerve entrapment syndrome. The majority of cases are due to compression or irritation of the median nerve in the carpal canal. It is diagnosed clinically, often being confirmed by an electromyogram, while ultrasonography criteria have become increasingly useful for the diagnosis. Ultrasonography is better tolerated, less expensive, yet just as effective as other diagnostic methods. It provides a good indication of the severity of the condition and it allows anatomical variants to be discerned...
November 15, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/29154511/clinical-study-on-the-treatment-of-multi-segmental-cervical-spondylotic-myelopathy-by-the-posterior-spatium-intermusculare-approach-for-spinal-canal-expansion-and-laminoplasty
#20
Ying Zhan, Zhencan Yuan, Qing Wang, Jingchao Li
No abstract text is available yet for this article.
November 20, 2017: Minerva Chirurgica
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