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https://www.readbyqxmd.com/read/28935483/force-and-deformation-stresses-in-customized-and-non-customized-plates-during-simulation-of-advancement-genioplasty
#1
V F Ramos, L A P F Pinto, R T Basting
PURPOSE: The aim of this study was to evaluate the distribution of deformation stresses in customized and non-customized plates during simulated advancement genioplasty, using the finite element method. METHODS: A customized plate (Traumec) was developed with 4.75 mm advancement, in ASTM F67 Grade 2 titanium, with four screws. Non-customized (standard) plates with 6 mm advancement (Stryker with six screws and Osteomed with four screws) were used for comparison...
August 31, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28920821/serum-ferritin-concentration-is-not-a-reliable-biomarker-of-iron-overload-disorder-progression-or-hemochromatosis-in-the-sumatran-rhinoceros-dicerorhinus-sumatrensis
#2
Terri L Roth, Paul R Reinhart, Jennifer L Kroll
The aim of this study was to determine if ferritin is a reliable biomarker of iron overload disorder (IOD) progression and hemochromatosis in the Sumatran rhinoceros (Dicerorhinus sumatrensis) by developing a species-specific ferritin assay and testing historically banked samples collected from rhinos that did and did not die of hemochromatosis. Ferritin extracted from Sumatran rhino liver tissue was used to generate antibodies for the Enzyme Immunoassay. Historically banked Sumatran rhino serum samples (n = 298) obtained from six rhinos in US zoos (n = 290); five rhinos at the Sumatran Rhino Conservation Centre in Sungai Dusun, Malaysia (n = 5); and two rhinos in Sabah, Malaysia (n = 3) were analyzed for ferritin concentrations...
September 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28920785/detomidine-and-butorphanol-for-standing-sedation-in-a-range-of-zoo-kept-ungulate-species
#3
Tim Bouts, Joanne Dodds, Karla Berry, Abdi Arif, Polly Taylor, Andrew Routh, Frank Gasthuys
General anesthesia poses risks for larger zoo species, like cardiorespiratory depression, myopathy, and hyperthermia. In ruminants, ruminal bloat and regurgitation of rumen contents with potential aspiration pneumonia are added risks. Thus, the use of sedation to perform minor procedures is justified in zoo animals. A combination of detomidine and butorphanol has been routinely used in domestic animals. This drug combination, administered by remote intramuscular injection, can also be applied for standing sedation in a range of zoo animals, allowing a number of minor procedures...
September 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28912691/the-brain-of-the-black-diceros-bicornis-and-white-ceratotherium-simum-african-rhinoceroses-morphology-and-volumetrics-from-magnetic-resonance-imaging
#4
Adhil Bhagwandin, Mark Haagensen, Paul R Manger
The morphology and volumetrics of the understudied brains of two iconic large terrestrial African mammals: the black (Diceros bicornis) and white (Ceratotherium simum) rhinoceroses are described. The black rhinoceros is typically solitary whereas the white rhinoceros is social, and both are members of the Perissodactyl order. Here, we provide descriptions of the surface of the brain of each rhinoceros. For both species, we use magnetic resonance images (MRI) to develop a description of the internal anatomy of the rhinoceros brain and to calculate the volume of the amygdala, cerebellum, corpus callosum, hippocampus, and ventricular system as well as to determine the gyrencephalic index...
2017: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/28889810/simple-diagnostic-signs-in-those-with-cognitive-impairment-anything-to-improve-detection-of-cognitive-disorders
#5
Michael C Woodward
With now over 50 million people worldwide with dementia (Prince et al., 2013), there are almost certainly well over 100 million people with cognitive concerns and many of these will attend their health professional keen to know what is going on. We need those without intensive training in this field to be more confident and correct in their diagnosis when such a concerned person turns up. Many simple diagnostic tests have been proposed and some assessed - these include the walk and talk (divided attention) test (those who stop when asked a question while walking may be cognitively impaired) (Lamoth et al...
September 11, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28875067/high-incidence-of-cervical-ribs-indicates-vulnerable-condition-in-late-pleistocene-woolly-rhinoceroses
#6
Alexandra A E van der Geer, Frietson Galis
Mammals as a rule have seven cervical vertebrae, a number that remains remarkably constant. Changes of this number are associated with major congenital abnormalities (pleiotropic effects) that are, at least in humans, strongly selected against. Recently, it was found that Late Pleistocene mammoths (Mammuthus primigenius) from the North Sea have an unusually high incidence of abnormal cervical vertebral numbers, approximately ten times higher than that of extant elephants. Abnormal numbers were due to the presence of large cervical ribs on the seventh vertebra, indicating a homeotic change from a cervical rib-less vertebra into a thoracic rib-bearing vertebra...
2017: PeerJ
https://www.readbyqxmd.com/read/28820298/surveillance-for-hemorrhagic-septicemia-in-buffalo-bubalus-bubalis-as-an-aid-to-range-expansion-of-the-javan-rhinoceros-rhinoceros-sondaicus-in-ujung-kulon-national-park-indonesia
#7
Kurnia Oktavia Khairani, Daryl Nydam, M Julia Felippe, Pat McDonough, Jason Barry, Rois Mahmud, M Haryono, Robin W Radcliffe
The Javan rhinoceros (Rhinoceros sondaicus) of Ujung Kulon National Park (UKNP) is the crown jewel of Indonesia's rich natural history. The park lies on a peninsula surrounded by coastline and agriculture-dominated landscapes. The invasion of water buffalo (Bubalus bubalis) into the park carries a substantial health risk to the Javan rhinoceros and threatens plans to establish a new population outside of its only current range in UKNP. Hemorrhagic septicemia (HS), known locally as septicemia epizootica and caused by Pasteurella multocida B:2, could thwart Indonesia's efforts to expand the range of the Javan rhinoceros...
August 18, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28814978/evolutionary-history-of-the-mariner-element-galluhop-in-avian-genomes
#8
Natasha Avila Bertocchi, Fabiano Pimentel Torres, Analía Del Valle Garnero, Ricardo José Gunski, Gabriel Luz Wallau
BACKGROUND: Transposable elements (TEs) are highly abundant genomic parasites in eukaryote genomes. Although several genomes have been screened for TEs, so far very limited information is available regarding avian TEs and their evolutionary histories. Taking advantage of the rich genomic data available for birds, we characterized the evolutionary history of the galluhop element, originally described in Gallus gallus, through the use of several bioinformatic analyses. RESULTS: galluhop homologous sequences were found in 6 of 72 genomes analyzed: 5 species of Galliformes (Gallus gallus, Meleagris gallopavo, Coturnix japonica, Colinus virginianus, Lyrurus tetrix) and one Buceritiformes (Buceros rhinoceros)...
2017: Mobile DNA
https://www.readbyqxmd.com/read/28812656/experimental-evidence-for-homeostatic-sex-allocation-after-sex-biased-reintroductions
#9
Wayne Leslie Linklater, Peter Roy Law, Jay Vinson Gedir, Pierre du Preez
First principles predict negative frequency-dependent sex allocation, but it is unproven in field studies and seldom considered, despite far-reaching consequences for theory and practice in population genetics and dynamics as well as animal ecology and behaviour. Twenty-four years of rhinoceros calving after 45 reintroductions across southern Africa provide the first in situ experimental evidence that unbalanced operational sex ratios predicted offspring sex and offspring sex ratios. Our understanding of population dynamics, especially reintroduction and invasion biology, will be significantly impacted by these findings...
March 6, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28809631/-comparison-between-the-range-of-movement-canine-real-cervical-spine-and-numerical-simulation-computer-model-validation
#10
R Srnec, Z Horák, R Sedláček, M Sedlinská, M Krbec, A Nečas
PURPOSE OF THE STUDY In developing new or modifying the existing surgical treatment methods of spine conditions an integral part of ex vivo experiments is the assessment of mechanical, kinematic and dynamic properties of created constructions. The aim of the study is to create an appropriately validated numerical model of canine cervical spine in order to obtain a tool for basic research to be applied in cervical spine surgeries. For this purpose, canine is a suitable model due to the occurrence of similar cervical spine conditions in some breeds of dogs and in humans...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28749277/case-series-clinical-salmonellosis-in-four-black-rhinoceros-diceros-bicornis-calves
#11
David Love, Rodolfo Madrigal, Shannon Cerveny, Janis Raines, Bruce Rideout, Nancy P Lung
Although Salmonella spp. infection has been identified in captive and free-ranging rhinoceros, clinical cases in black rhinoceros ( Diceros bicornis ) calves have not been described. This case series describes clinical salmonellosis in four black rhinoceros calves. Two calves developed self-limiting diarrhea, recovering after treatment. The other two cases were fatal. One of the fatal cases had a short clinical course, whereas the other case was protracted, with signs reflecting multiple organ system involvement...
June 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28743668/a-new-haplotype-of-the-coconut-rhinoceros-beetle-oryctes-rhinoceros-has-escaped-biological-control-by-oryctes-rhinoceros-nudivirus-and-is-invading-pacific-islands
#12
Sean D G Marshall, Aubrey Moore, Maclean Vaqalo, Alasdair Noble, Trevor A Jackson
The coconut rhinoceros beetle (CRB; Oryctes rhinoceros) is a major pest of coconut and oil palm, but the discovery and release of Oryctes rhinoceros nudivirus (OrNV) in the 1960s and 70s suppressed the pest such that no new invasions of uninfested islands by CRB were reported for over 30years after implementation of the biocontrol programme. Surprisingly, a highly damaging outbreak was reported from Guam (2007), which could not be controlled by OrNV. Subsequently, new invasions have been reported from Port Moresby, Papua New Guinea (2009); O'ahu, Hawai'i (2013); and Honiara, Solomon Islands (2015)...
October 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28708909/biomechanical-three-dimensional-finite-element-analysis-of-single-implant-supported-prostheses-in-the-anterior-maxilla-with-different-surgical-techniques-and-implant-types
#13
Fellippo Ramos Verri, Joel Ferreira Santiago, Daniel Augusto Almeida, Victor Eduardo de Souza Batista, Cleidiel Aparecido Araujo Lemos, Caroline Cantieri Mello, Eduardo Piza Pellizzer
PURPOSE: The aim of this study was to use three-dimensional finite element analysis to analyze the stress distribution transferred by single implant-supported prostheses placed in the anterior maxilla using different connections (external hexagon, internal hexagon, or Morse taper), inclinations of the load (0, 30, or 60 degrees), and surgical techniques for placement (monocortical/conventional, bicortical, or bicortical with nasal floor elevation). MATERIALS AND METHODS: Nine models representing a bone block of this region were simulated by computer-aided design software (InVesalius, Rhinoceros, SolidWorks)...
July 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28686714/experimental-mycobacterium-bovis-infection-in-three-white-rhinoceroses-ceratotherium-simum-susceptibility-clinical-and-anatomical-pathology
#14
Anita L Michel, Emily P Lane, Lin-Mari de Klerk-Lorist, Markus Hofmeyr, Elisabeth M D L van der Heijden, Louise Botha, Paul van Helden, Michele Miller, Peter Buss
Tuberculosis caused by Mycobacterium bovis is endemic in the African buffalo (Syncerus caffer) population in the Kruger National Park and other conservation areas in South Africa. The disease has been diagnosed in a total of 21 free ranging or semi-free ranging wildlife species in the country with highly variable presentations in terms of clinical signs as well as severity and distribution of tuberculous lesions. Most species are spillover or dead-end hosts without significant role in the epidemiology of the disease...
2017: PloS One
https://www.readbyqxmd.com/read/28680895/visualization-of-the-capitellum-during-elbow-arthroscopy-a-comparison-of-3-portal-techniques
#15
David P Trofa, Stephanie M Gancarczyk, Joseph M Lombardi, Eric C Makhni, Charles A Popkin, Christopher S Ahmad
BACKGROUND: Capitellar osteochondritis dissecans (OCD) is a debilitating condition of unknown etiology for which various arthroscopic treatments are available. Prior data suggest that greater than 75% of the capitellum can be visualized arthroscopically through a dual lateral portal approach. However, there is no literature assessing arthroscopic visualization of the capitellum via alternative portals. PURPOSE: To determine the percentage of capitellum visualized using the dual lateral, distal ulnar and soft spot, and posterolateral and soft spot portal configurations in a cadaver model...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28670326/isolation-and-biochemical-characterization-of-bradykinin-potentiating-peptides-from-bitis-gabonica-rhinoceros
#16
Tamara M Fucase, Juliana M Sciani, Ingrid Cavalcante, Vincent L Viala, Bruno B Chagas, Daniel C Pimenta, Patrick J Spencer
BACKGROUND: Venoms represent a still underexplored reservoir of bioactive components that might mitigate or cure diseases in conditions in which conventional therapy is ineffective. The bradykinin-potentiating peptides (BPPs) comprise a class of angiotensin-I converting enzyme (ACE) inhibitors. The BPPs usually consist of oligopeptides with 5 to 13 residues with a high number of proline residues and the tripeptide Ile-Pro-Pro (IPP-tripeptide) in the C-terminus region and have a conserved N-terminal pyroglutamate residue...
2017: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/28642647/comparison-between-rendering-3d-ct-and-transparent-3d-ct-in-acl-tunnel-positioning
#17
Marcos Amstalden Barros, Tiago Lazzaretti Fernandes, Dimitris Dimitriou, André Pedrinelli, Arnaldo José Hernandez
OBJECTIVE: To compare the transparent 3D computed tomography (CT) image protocol against conventional 3D-CT image-rendering protocol to assess femoral tunnel position in anatomic anterior cruciate ligament (ACL) reconstructions . METHODS: Eight knee CT scans from cadavers were analyzed by image rendering 3D-CT protocol, using Rhinoceros((r)) software. The central point of the ACL tunnel was set using the sagittal plane. Same CT scans were analyzed using transparent 3D-CT measurement protocol with OsiriX((r)) software...
January 2017: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/28624290/feasibility-of-reducing-differences-in-estimated-doses-in-nuclear-medicine-between-a-patient-specific-and-a-reference-phantom
#18
Alexandra Zvereva, Helmut Schlattl, Maria Zankl, Janine Becker, Nina Petoussi-Henss, Yeon Soo Yeom, Chan Hyeong Kim, Christoph Hoeschen, Katia Parodi
The feasibility of reducing the differences between patient-specific internal doses and doses estimated using reference phantoms was evaluated. Relatively simple adjustments to a polygon-surface ICRP adult male reference phantom were applied to fit selected individual dimensions using the software Rhinoceros®4.0. We tested this approach on two patient-specific phantoms: the biggest and the smallest phantoms from the Helmholtz Zentrum München library. These phantoms have unrelated anatomy and large differences in body-mass-index...
July 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28553355/innovative-3d-model-of-the-human-middle-ear-in-high-resolution-with-a-histological-microgrinding-method-a-feasibility-study-and-comparison-with-%C3%AE-ct
#19
Susanne Bradel, Laura Doniga-Crivat, Silke Besdo, Franziska Lexow, Michael Fehr, Thomas Lenarz, Nils Prenzler, Gudrun Brandes
Conclusion. The development of a histological 3D model of the tympanic cavity visualizes the exact microanatomy of the sound conduction organ and is therefore essential for finite elements simulations and surgical training. Objectives. So far, no accurate histological 3D model of the sound conduction system existed in literature. For 3D reconstruction of the very fine structures inside and outside the auditory ossicles, a method based on histological slices allows a more differential analysis of both hard and soft tissues and could thus be superior to μCT...
2017: International Journal of Otolaryngology
https://www.readbyqxmd.com/read/28552926/modelling-and-structural-analysis-of-skull-cranial-implant-beyond-mid-line-deformities
#20
V Phanindra Bogu, Y Ravi Kumar, Asit Kumar Khanara
PURPOSE: This computational study explores modelling and finite element study of the implant under Intracranial pressure (ICP) conditions with normal ICP range (7 mm Hg to 15 mm Hg) or increased ICP (>I5 mm Hg). The implant fixation points allow implant behaviour with respect to intracranial pressure conditions. However, increased fixation points lead to variation in deformation and equivalent stress. Finite element analysis is providing a valuable insight to know the deformation and equivalent stress...
2017: Acta of Bioengineering and Biomechanics
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