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https://www.readbyqxmd.com/read/27917349/effect-of-acute-salinity-stress-on-ion-homeostasis-na-k-atpase-and-histological-structure-in-sea-cucumber-apostichopus-japonicus
#1
Chenfan Geng, Yi Tian, Yanpeng Shang, Liqiang Wang, Yanan Jiang, Yaqing Chang
BACKGROUND: Sea cucumbers (Apostichopus japonicus) are an imperiled fauna exposed to a variety of environmental condition such as salinity and studies are urgently needed to assess their effects to guide aquaculture efforts. The effects of acute salinity stress on coelomic fluid osmotic pressure, ion concentrations, the activity of Na(+)/K(+)-ATPase in respiratory trees and the histological variations were measured to evaluate the salinity tolerance of sea cucumbers. RESULTS: Significant correlations in osmotic pressure were observed between coelomic fluid and ambient environmental salinity...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27917329/minimally-invasive-treatment-of-tibial-pilon-fractures-through-arthroscopy-and-external-fixator-assisted-reduction
#2
Huasong Luo, Liaobin Chen, Kebin Liu, Songming Peng, Jien Zhang, Yang Yi
OBJECTIVE: The aim of this study was to evaluate the clinical outcome of tibial pilon fractures treated with arthroscopy and assisted reduction with an external fixator. METHODS: Thirteen patients with tibial pilon fractures underwent assisted reduction for limited lower internal fixation with an external fixator under arthroscopic guidance. The weight-bearing time was decided on the basis of repeat radiography of the tibia 3 months after surgery. Postoperative ankle function was evaluated according to the Mazur scoring system...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27915156/fracture-resistance-of-zirconia-based-implant-abutments-after-artificial-long-term-aging
#3
Abdulaziz Alsahhaf, Benedikt Christopher Spies, Kirstin Vach, Ralf-Joachim Kohal
OBJECTIVE: To investigate the survival rate, fracture strength, bending moments, loading to fracture and fracture modes of different designs of zirconia abutments after dynamic loading with thermocycling, and compare these values to titanium abutments. METHODS: A total of 80 abutment samples were divided into 5 test groups of 16 samples in each group. The study included the following groups, "Group 1" CAD/CAM produced all-zirconia abutments, "Group 2" titanium abutments, "Group 3" zirconia-abutments adhesively luted to a titanium base, "Group 4" prefabricated all-zirconia abutments and "Group 5" zirconia-abutments glass soldered to a titanium base...
November 21, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27915097/effects-of-chronic-lead-exposure-on-bone-mineral-properties-in-femurs-of-growing-rats
#4
Pedro Álvarez-Lloret, Ching Ming Lee, María Inés Conti, Antonela Romina Terrizzi, Santiago González-López, María Pilar Martínez
Lead exposure has been associated with several defective skeletal growth processes and bone mineral alterations. The aim of the present study is to make a more detailed description of the toxic effects of lead intoxication on bone intrinsic material properties as mineral composition, morphology and microstructural characteristics. For this purpose, Wistar rats were exposed (n=12) to 1000ppm lead acetate in drinking water for 90days while control group (n=8) were treated with sodium acetate. Femurs were examined using inductively coupled plasma optical emission spectrometry (ICP-OES), Attenuated Total Reflection Fourier transform infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD), and micro-Computed Tomography (μCT)...
November 30, 2016: Toxicology
https://www.readbyqxmd.com/read/27914550/evaluation-of-macroscopic-changes-and-the-efficiency-of-dna-profiling-from-burnt-teeth
#5
Joe Adserias Garriga, Douglas H Ubelaker, Sara C Zapico
Identification of human remains subjected to incineration is extremely challenging. Our study evaluates the macroscopic changes and efficiency of DNA profiling in burnt teeth under controlled temperature and time conditions. 28 teeth were exposed to temperatures between 100 and 700°C for a duration of 1-15min. Two non-burnt teeth were used as control. Macroscopic changes were evaluated and recorded. DNA was extracted using a silica-based methodology. Efficiency of DNA profiling was assessed through Quantitative PCR for STRs...
December 2016: Science & Justice: Journal of the Forensic Science Society
https://www.readbyqxmd.com/read/27905059/exposure-to-secondhand-smoke-impairs-fracture-healing-in-rats
#6
Hildemberg A R Santiago, Ariane Zamarioli, Manoel D Sousa Neto, Jose B Volpon
BACKGROUND: Nonsmokers may be affected by environmental tobacco smoke (secondhand smoke), but the effects of such exposure on fracture healing have not been well studied. QUESTIONS/PURPOSES: To explore the possible effects of passive inhalation of tobacco smoke on the healing of a diaphyseal fracture in femurs of rats. We hypothesized that secondhand exposure to tobacco smoke adversely affects fracture healing. METHODS: A mid-diaphyseal fracture was created in the femur of 41 female Wistar rats and fixed with an intramedullary metallic pin; 14 rats were excluded (nine for inadequate fractures and five for K wire extrusion)...
November 30, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27890210/-surgical-exposures-for-distal-radius-fractures
#7
O Mares, R Coulomb, C Lazerges, C Bosch, P Kouyoumdjian
This is a review of the various approaches that can be used for open reduction and internal fixation (ORIF) of distal radius fractures. The main dissection steps are exposed and the specific indications for each approach are described. The anterior approach is discussed extensively as it is now the gold standard for ORIF of distal radius fractures. The lateral and posterior approaches are also described as they are sometimes needed for complex fractures.
December 2016: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/27878549/fluoroscopic-freehand-and-electromagnetic-guided-targeting-system-for-distal-locking-screws-of-humeral-intramedullary-nail
#8
P Persiani, M Gurzi, O Moreschini, G Di Giacomo, C Villani
PURPOSE: The current techniques used to lock distal screws for the nailing of long bone fractures expose the surgeons, radiologists and patients to a hearty dose of ionizing radiation. The Sureshot™ Distal Targeting System is a new technique that, with the same results, allows for shorter surgery times and, consequently, less exposure to radiation. MATERIALS AND METHODS: The study was performed on 59 patients (34 males and 25 females) with a simple humerus fracture diagnosis, type 1...
November 22, 2016: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/27866217/osteonecrosis-of-the-jaw-onj-and-atypical-femoral-fracture-aff-in-an-osteoporotic-patient-chronically-treated-with-bisphosphonates
#9
A Sánchez, R Blanco
The aim of the study is to report the rare association of two complications of long-term treatment of osteoporosis with bisphosphonates in the same Caucasian elderly patient. A female patient of Italian descent, age 87 years, consulted in February 2013. She had a history of osteoporosis and had taken alendronate weekly for 7 years (1999-2006). Due to low back pain, an orthopedist had indicated i.v. zoledronic acid, 5 mg/year for 3 years (2006-2008). She received occasional supplements of ergocalciferol...
November 20, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27861131/management-of-open-lower-extremity-wounds-with-concomitant-fracture-using-a-porcine-urinary-bladder-matrix
#10
Bruce A Kraemer, Scott E Geiger, Oliver A Deigni, John Tracy Watson
BACKGROUND: Open wounds of the distal third of the leg and foot with exposed bone, fractures, and hardware are challenging wounds for which to achieve stable coverage. The orthopedic advances in lower extremity fracture management over the last 30 years have allowed a rethinking of the standard operative approach to close these complex wounds. MATERIALS AND METHODS: The ability of extracellular matrix (ECM) products to facilitate constructive remodeling of a wound seemed a reasonable approach for treatment, especially in patients who are often poor surgical candidates for more advanced reconstructive procedures...
November 2016: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/27847136/evaluation-of-two-trephine-techniques-for-removal-of-fractured-rotary-nickel-titanium-instruments-from-root-canals
#11
Qian Yang, Ya Shen, Dingming Huang, Xuedong Zhou, Yuan Gao, Markus Haapasalo
INTRODUCTION: The aim of this in vitro study was to evaluate the effects on root dentin of 2 trephining techniques using an ultrasonic tip or a trepan bur in the mesial canals of mandibular molars during attempts to remove fractured file fragments using micro-computed tomographic imaging. METHODS: Twenty-one teeth with a similar anatomic configuration in mesial (buccal and lingual) canals were selected. A 4-mm apical segment of K3 file size 25/.06 was fractured in each mesiobuccal and mesiolingual canal 5 mm apically from the canal orifice...
November 12, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27837530/freeze-fracture-electron-microscopy-on-domains-in-lipid-mono-and-bilayer-on-nano-resolution-scale
#12
Brigitte Papahadjopoulos-Sternberg
Freeze-fracture electron microscopy (FFEM) as a cryofixation, replica, and transmission electron microscopy technique is unique in membrane bilayer and lipid monolayer research because it enables us to excess and visualize pattern such as domains in the hydrophobic center of lipid bilayer as well as the lipid/gas interface of lipid monolayer. Since one of the preparation steps of this technique includes fracturing the frozen sample and since during this fracturing process the fracture plane follows the area of weakest forces, these areas are exposed allowing us to explore pattern built up by lipids and/or intrinsic proteins but also initiated by peptides, drugs, and toxins reaching into these normally hard to access areas...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27830151/the-effect-of-energy-densities-on-the-shear-bond-strength-of-self-adhering-flowable-composite-to-er-yag-pretreated-dentin
#13
Paul Nahas, Toni Zeinoun, Zeina Majzoub, Karim Corbani, Samir Nammour
Objective. To investigate the shear bond strength of self-adhering flowable resin composite, to dentin, after exposing it to Er:YAG laser radiation, at different energy densities. Materials and Methods. Sixty freshly extracted human third molars were randomly divided into five groups (n = 12). In the control group, dentin was left unirradiated, whereas, in the other four groups, dentin was irradiated with Er:YAG laser in noncontact mode (MSP mode = 100 µs; 10 Hz; beam diameter: 1.3 mm; speed of 1 mm/second; air 6 mL/min; and water 4 mL/min), and respectively, with the following level of energy (50 mJ, 60 mJ, 80 mJ, and 100 mJ)...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27820690/multidisciplinary-treatment-of-complicated-crown-root-fractures-a-case-study
#14
I L Stojanac, B V Bajkin, M T Premovic, B D Ramic, L M Petrovic
Traumatic dental injuries usually occur among children and adolescents, with maxillary central incisors as the most often affected teeth. Complicated crown-root fractures are particularly challenging for esthetic and functional rehabilitation and often require a multidisciplinary approach. A 21-year-old male patient came to the Dental Clinic due to fractured maxillary incisors caused by trauma during a sporting activity. Clinical examination revealed horizontal fractures of teeth 7, 8, and 9, initiating in the labial cervical third and extending subgingivally on the palate, with exposed pulp tissues...
November 2016: Operative Dentistry
https://www.readbyqxmd.com/read/27803225/should-syndesmotic-screws-be-removed-after-surgical-fixation-of-unstable-ankle-fractures-a-systematic-review
#15
S A Dingemans, S Rammelt, T O White, J C Goslings, T Schepers
AIMS: In approximately 20% of patients with ankle fractures, there is an concomitant injury to the syndesmosis which requires stabilisation, usually with one or more syndesmotic screws. The aim of this review is to evaluate whether removal of the syndesmotic screw is required in order for the patient to obtain optimal functional recovery. MATERIALS AND METHODS: A literature search was conducted in Medline, Embase and the Cochrane Library for articles in which the syndesmotic screw was retained...
November 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/27802170/specification-of-osteoblast-cell-fate-by-canonical-wnt-signaling-requires-bmp2
#16
Valerie S Salazar, Satoshi Ohte, Luciane P Capelo, Laura Gamer, Vicki Rosen
Enhanced BMP or canonical Wnt (cWnt) signaling are therapeutic strategies employed to enhance bone formation and fracture repair, but the mechanisms each pathway utilizes to specify cell fate of bone-forming osteoblasts remain poorly understood. Among all BMPs expressed in bone, we find that singular deficiency of Bmp2 blocks the ability of cWnt signaling to specify osteoblasts from limb bud or bone marrow progenitors. When exposed to cWnts, Bmp2-deficient cells fail to progress through the Runx2/Osx1 checkpoint and thus do not upregulate multiple genes controlling mineral metabolism in osteoblasts...
December 1, 2016: Development
https://www.readbyqxmd.com/read/27795644/the-facial-skeleton-armor-to-the-brain
#17
Satishkumar G Patil, Bindu S Patil, Udupikrishna Joshi, Soumya Allurkar, Sharanabasappa Japatti, Ashwini Munnangi
BACKGROUND: With the development of urban setting worldwide, the major issue of concern is the increase in the mortality rate in the population due to road traffic accidents. The face, being the most exposed region is susceptible to injuries and maybe associated with injuries to the adjacent neuro-cranium. The literature has conflicting views on the relationship between facial fractures and head injuries with some authors opining that the facial skeleton cushions the brain while some other authors claim that the facial fractures act as indicators for head injuries...
September 2016: Indian Journal of Dentistry
https://www.readbyqxmd.com/read/27783985/geochemical-and-mineralogical-fingerprints-to-distinguish-the-exploited-ferruginous-mineralisations-of-grotta-della-monaca-calabria-italy
#18
Luca Antonio Dimuccio, Nelson Rodrigues, Felice Larocca, João Pratas, Ana Margarida Amado, Luís A E Batista de Carvalho
This study examines the geochemical and mineralogical variations in the ferruginous mineralisations that crop out within Grotta della Monaca, which is considered to be the most striking and best known example of a prehistoric iron mine-cave from the southern Apennines (Calabria, Italy). Previous archaeological research identified three local and distinct ancient exploitation phases of these ferruginous mineralisations: (1) an Upper Palaeolithic phase; (2) a Late Neolithic phase; and (3) a post-Medieval phase...
October 17, 2016: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/27783932/unconventional-oil-and-gas-development-and-risk-of-childhood-leukemia-assessing-the-evidence
#19
Elise G Elliott, Pauline Trinh, Xiaomei Ma, Brian P Leaderer, Mary H Ward, Nicole C Deziel
The widespread distribution of unconventional oil and gas (UO&G) wells and other facilities in the United States potentially exposes millions of people to air and water pollutants, including known or suspected carcinogens. Childhood leukemia is a particular concern because of the disease severity, vulnerable population, and short disease latency. A comprehensive review of carcinogens and leukemogens associated with UO&G development is not available and could inform future exposure monitoring studies and human health assessments...
October 23, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27773371/circular-frame-fixation-for-calcaneal-fractures-risks-injury-to-the-medial-neurovascular-structures-a-cadaveric-description
#20
Tom Esparon, Callum M Thomson, Paul M Rea, Bilal Jamal
AIM: There is a risk of iatrogenic injury to the soft tissues of the calcaneus and this study assesses the risk of injury to these structures in circular frame calcaneal fracture fixation. MATERIALS AND METHODS: After olive tip wires were inserted, an L-shaped incision on the lateral and medial aspects of 5 formalin fixed cadaveric feet was performed to expose the underlying soft tissues. The calcaneus was divided into zones corresponding to high, medium and low risk using a grading system...
December 2016: Injury
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