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https://www.readbyqxmd.com/read/29351113/fatigue-failure-of-external-hexagon-connections-on-cemented-implant-supported-crowns
#1
João Malta Barbosa, Daniel Navarro da Rocha, Ronaldo Hirata, Gileade Freitas, Estevam A Bonfante, Paulo G Coelho
PURPOSE: To evaluate the probability of survival and failure modes of different external hexagon connection systems restored with anterior cement-retained single-unit crowns. The postulated null hypothesis was that there would be no differences under accelerated life testing. MATERIALS AND METHODS: Fifty-four external hexagon dental implants (∼4 mm diameter) were used for single cement-retained crown replacement and divided into 3 groups: (3i) Full OSSEOTITE, Biomet 3i (n = 18); (OL) OEX P4, Osseolife Implants (n = 18); and (IL) Unihex, Intra-Lock International (n = 18)...
January 17, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29313319/early-experience-with-a-tapered-titanium-porous-plasma-sprayed-stem-with-updated-design
#2
Antonio G Manocchio, Keith R Berend, Michael J Morris, Joanne B Adams, Adolph V Lombardi
INTRODUCTION: The Taperloc® Complete femoral stem (Zimmer Biomet, Warsaw, Indiana) builds on the widespread clinical success of the original Taperloc design used since 1982. Enhancements to the Complete design include a lowered caput-collum-diaphyseal (CCD) angle from 138° to 133° for improved offset, optimized neck taper with polished neck flats to increase range of motion, reduced distal geometry to improve proximal canal fill, and gradual off-loading that is the goal of tapered geometry...
December 22, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/29305101/development-of-a-hybrid-computational-experimental-framework-for-evaluation-of-damage-mechanisms-of-a-linked-semiconstrained-total-elbow-system
#3
Danial Sharifi Kia, Ryan Willing
BACKGROUND: Long-term durability of total elbow arthroplasty (TEA) is a concern, and bearing wear or excessive deformations may necessitate early revision. The current study used experimental wear testing and computational finite element modeling to develop a hybrid computational and experimental framework for the evaluation of TEA damage mechanisms. METHODS: Three Coonrad-Morrey (Zimmer-Biomet Inc., Warsaw, IN, USA) TEA implants were used for experimental wear testing for 200,000  cycles...
January 2, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29301328/metal-ion-effects-on-a%C3%AE-and-tau-aggregation
#4
REVIEW
Anne Claire Kim, Sungsu Lim, Yun Kyung Kim
Amyloid and tau aggregation are implicated in manifold neurodegenerative diseases and serve as two signature pathological hallmarks in Alzheimer's disease (AD). Though aging is considered as a prominent risk factor for AD pathogenesis, substantial evidence suggests that an imbalance of essential biometal ions in the body and exposure to certain metal ions in the environment can potentially induce alterations to AD pathology. Despite their physiological importance in various intracellular processes, biometal ions, when present in excessive or deficient amounts, can serve as a mediating factor for neurotoxicity...
January 2, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29281262/binding-of-zn-ii-to-tropomyosin-receptor-kinase-a-in-complex-with-its-cognate-nerve-growth-factor-insights-from-molecular-simulation-and-in-vitro-essays
#5
Adriana Pietropaolo, Antonio Magrì, Valentina Greco, Valeria Losasso, Diego La Mendola, Sebastiano Sciuto, Paolo Carloni, Enrico Rizzarelli
The binding of the human nerve growth factor (NGF) protein to the tropomyosin-receptor-kinase A (TrkA) is associated with Alzhemeir's development. Owing to the large presence of zinc(II) ions in the synaptic compartments, the zinc ions might be bound to the complex in vivo. Here, we have identified a putative zinc binding site using a combination of computations and experiments. First, we have predicted structural features of the NGF/TrkA complex in aqueous solution by molecular simulation. Metadynamics free energy calculations suggest that these are very similar to those in the X-ray structure...
December 27, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29276536/establishing-the-appropriate-position-of-proximal-humerus-locking-plates-a-cadaveric-study-of-five-plating-systems-and-their-anatomic-reference-measurements
#6
Matthew A Butler, Aakash Chauhan, Gregory A Merrell, Jeffrey A Greenberg
Background: The present study aimed to determine anatomic references for the placement of five proximal humerus locking plates. Methods: Five proximal humerus locking-plate systems were placed on six human shoulder cadavers. Plates were positioned by fluoroscopic confirmation so that the inferior oblique screw was within 5 mm of the inferomedial cortex. Plate position was measured using the superior border of the pectoralis major tendon (PMT) to the bottom of the first slotted or nonlocking hole and top of the plate to the top of the greater tuberosity...
January 2018: Shoulder & Elbow
https://www.readbyqxmd.com/read/29260498/ocular-biometric-changes-with-different-accommodative-stimuli-using-swept-source-optical-coherence-tomography
#7
Teresa Ferrer-Blasco, José J Esteve-Taboada, Daniel Monsálvez-Romín, Miguel A Aloy, José E Adsuara, Pablo Cerdá-Durán, Robert Montés-Micó
PURPOSE: To evaluate ocular biometric changes with different accommodative stimuli using a new swept-source optical biometer. METHODS: Only the right eye was analyzed. Each subject was measured six times with the IOLMaster 700 swept-source optical biometer (Carl Zeiss Meditec, Jena, Germany) with the subject looking at the stimulus shown by the instrument and with the subject looking at a target placed outside the instrument at 0D of vergence. Axial length (AL), anterior chamber depth (ACD), central corneal thickness (CCT), lens thickness (LT), white-to-white (WTW), and keratometry readings (K1 and K2) were evaluated in both cases...
December 19, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/29234746/short-implants-as-an-alternative-to-crestal-sinus-lift-a-3-year-multicentre-randomised-controlled-trial
#8
Giorgio Gastaldi, Pietro Felice, Roberto Pistilli, Carlo Barausse, Anna Trullenque-Eriksson, Marco Esposito
PURPOSE: To evaluate the efficacy of short (5 or 6 mm long) dental implants vs 10 mm or longer implants placed in crestally lifted sinuses. MATERIALS AND METHODS: Twenty partially edentulous patients with 5 to 7 mm of residual crestal height and at least 7 mm thickness below the maxillary sinuses as measured on computed tomography scans were randomised according to a parallel group design to receive either one to two 5 or 6 mm long implants (10 patients) or 10 mm long implants (10 patients) after crestal sinus lifting and grafting with anorganic bovine bone...
2017: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/29223229/comparison-of-a-new-scheimpflug-imaging-combined-with-partial-coherence-interferometry-biometer-and-a-low-coherence-reflectometry-biometer
#9
Ramón Ruiz-Mesa, Antonio Abengózar-Vela, María Ruiz-Santos
PURPOSE: To evaluate the repeatability of a new biometer using Scheimpflug technology combined with partial coherence interferometry (PCI) (Pentacam AXL) and its agreement with a device based on optical low-coherence reflectometry (OLCR), the Allegro Biograph. SETTING: Oftalvist Centro Integral Ocular Jerez, Jerez de la Frontera, Spain. DESIGN: Evaluation of a diagnostic test. METHODS: The mean keratometry (K), central corneal thickness (CCT), anterior chamber depth (ACD), and axial length (AL) were measured with the 2 devices 3 times by the same examiner in 2 groups (patients with cataract and patients without cataract)...
November 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29174405/mixing-of-head-stem-components-in-total-hip-arthroplasty
#10
Ulrike Mueller, Benjamin Panzram, Steffen Braun, Robert Sonntag, J Philippe Kretzer
BACKGROUND: Implant manufacturers proclaim that the tapers of modular total hip arthroplasty are not standardized and can vary from manufacturer to manufacturer. That is why the combination of various components from different manufacturers ("Mix and Match") is not permitted. In this study, different taper combinations were investigated experimentally to assess the effect of "Mix and Match" regarding the taper connection strength. METHODS: Torque-off tests using hip stems and metal femoral heads from 6 different implant manufacturers were performed...
November 1, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29170850/carbon-monoxide-inhibits-hemotoxic-activity-of-elapidae-venoms-potential-role-of-heme
#11
Vance G Nielsen, Nathaniel Frank, Ryan W Matika
Envenomation by hemotoxic enzymes continues to be a major cause of morbidity and mortality throughout the world. With regard to treatment, the gold standard to abrogate coagulopathy caused by these venoms is still the administration of antivenom; however, despite antivenom therapy, coagulopathy still occurs and recurs. Of interest, this laboratory has demonstrated in vitro and in vivo that coagulopathy inducing venom derived from snakes of the family Viperidae exposed to carbon monoxide (CO) is inhibited, potentially by an attached heme...
November 23, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/29146352/anti-inflammatory-properties-of-edible-mushrooms-a-review
#12
REVIEW
Bożena Muszyńska, Agata Grzywacz-Kisielewska, Katarzyna Kała, Joanna Gdula-Argasińska
Mushrooms have been used extensively, owing to their nutritional and medicinal value, for thousands of years. Modern research confirms the therapeutic effect of traditionally used species. Inflammation is a natural response of the immune system to damaging factors, e.g. physical, chemical and pathogenic. Deficiencies of antioxidants, vitamins, and microelements, as well as physiological processes, such as aging, can affect the body's ability to resolve inflammation. Mushrooms are rich in anti-inflammatory components, such as polysaccharides, phenolic and indolic compounds, mycosteroids, fatty acids, carotenoids, vitamins, and biometals...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29135335/retrospective-study-of-tapered-1-piece-implants-placed-over-a-10-year-period-in-a-single-private-practice
#13
John Minichetti, Joseph C D'Amore, Anna Yj Hong
Today clinicians have a variety of treatment modalities available to address the increasing number of implant procedures performed each year. Single-stage implant surgery is now commonly used in implant dentistry. With patient demands for immediate restoration, the utilization of 1-piece implants is gaining acceptance. This article reports the results of tapered 1-piece implants (Zimmer Biomet) placed in a single practice over a 10-year period. A total of 33 1-piece dental implants were placed in 24 patients and provisionally restored out of occlusion at the time of surgery...
November 14, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29120945/a-comparison-of-red-cell-rejuvenation-versus-mechanical-washing-for-the-prevention-of-transfusion-associated-organ-injury-in-swine
#14
Marcin J Woźniak, Saqib Qureshi, Nikol Sullo, William Dott, Rebecca Cardigan, Michael Wiltshire, Mintu Nath, Nishith N Patel, Tracy Kumar, Alison H Goodall, Gavin J Murphy
BACKGROUND: We evaluated the effects of two interventions that modify the red cell storage lesion on kidney and lung injury in experimental models of transfusion. METHODS: White-landrace pigs (n = 32) were allocated to receive sham transfusion (crystalloid), 14-day stored allogeneic red cells, 14-day red cells washed using the red cells washing/salvage system (CATS; Fresenius, Germany), or 14-day red cells rejuvenated using the inosine solution (Rejuvesol solution; Zimmer Biomet, USA) and washed using the CATS device...
November 9, 2017: Anesthesiology
https://www.readbyqxmd.com/read/29114205/biometal-dyshomeostasis-and-toxic-metal-accumulations-in-the-development-of-alzheimer-s-disease
#15
REVIEW
Yong Li, Qian Jiao, Huamin Xu, Xixun Du, Limin Shi, Fengju Jia, Hong Jiang
Biometal dyshomeostasis and toxic metal accumulation are common features in many neurodegenerative disorders, including Alzheimer's disease (AD), Parkinson's disease, and Huntington's disease. The neurotoxic effects of metal imbalance are generally associated with reduced enzymatic activities, elevated protein aggregation and oxidative stress in the central nervous system, in which a cascade of events lead to cell death and neurodegeneration. Although the links between biometal imbalance and neurodegenerative disorders remain elusive, a major class of endogenous proteins involved in metal transport has been receiving increasing attention over recent decades...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29113757/eight-hundred-twenty-five-medial-mobile-bearing-unicompartmental-knee-arthroplaties-the-first-10-year-us%C3%A2-multi-center-survival-analysis
#16
Omar K Alnachoukati, John W Barrington, Keith R Berend, Michael C Kolczun, Roger H Emerson, Adolph V Lombardi, David R Mauerhan
BACKGROUND: FDA approval for the Oxford phase III device was approved for use in the United States in 2004. This study seeks to provide the first long-term, large patient sample size, Oxford phase III multi-site survivorship study in the United States, investigating patient reported outcomes of pain and function, while also providing an in-depth analysis of causes for revision, and finally addressing recent advancements that can help aid the unicompartmental knee arthroplasty (UKA) process and further improve partial knee survivorship...
October 16, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29109833/magnesium-and-other-biometals-in-oxidative-medicine-and-redox-biology
#17
EDITORIAL
Martin Kolisek, Rhian M Touyz, Andrea Romani, Mario Barbagallo
No abstract text is available yet for this article.
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29090488/validation-of-keratometric-measurements-obtained-with-an-intraoperative-image-guided-system-intra-session-repeatability-and-interchangeability-with-an-optical-biometer
#18
Clara Ruiz-Belda, Fermín Rodrigo, David P Piñero
PURPOSE: To evaluate the intra-session repeatability of keratometric measurements obtained in healthy eyes with the Verion image-guided system (Alcon Laboratories Inc, Fort Worth, Texas, USA) as well as the interchangeability of such measurements with those obtained with an optical biometer (Aladdin, Topcon, Tokyo, Japan). METHODS: A total of 53 eyes of 53 patients (age 31-67 years) were enrolled in the study. All eyes received a comprehensive ophthalmologic examination including an analysis with the Verion image-guided and Aladdin systems...
October 31, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/29078996/ambulatory-unicompartmental-knee-arthroplasty-short-outcome-of-50-first-cases
#19
N Ruiz, X Buisson, G Filippi, M Roulet, H Robert
INTRODUCTION: The reduction in length of stay (LOS) in orthopaedic surgery has been steady for several years. For the past 3 or 4 years in France, the trend towards outpatient surgery has been growing up, as it is a goal for hospital administration. MATERIALS AND METHODS: This is a prospective, continuous,mono-centric, single operator study on 56 UKAs. Included were all UKAs carried out between January 2014 and December 2015, meeting the following criteria: voluntary patients, supportive family environment, absence of comorbidity (oral anticoagulants, diabetes, obesity), ASA score ≤ 3...
October 24, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29077682/one-stage-treatment-of-giant-condylar-osteoma-alloplastic-total-temporomandibular-joint-replacement-aided-by-digital-templates
#20
Xin Xu, Hailong Ma, Shufang Jin
OBJECTIVES: To introduce the surgical techniques and evaluate the effect of alloplastic total temporomandibular joint (TMJ) replacement aided by digital templates in giant condylar osteoma. METHODS: Three patients with giant condylar osteoma were enrolled in this study. The maximal mouth opening was 1.9 cm on average. All the patients were underwent the computed tomography scan (slice thickness 1 mm) and the data were imported to Proplan 1.3 software for 3-dimensional bony segmentation and reconstruction...
October 26, 2017: Journal of Craniofacial Surgery
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