keyword
MENU ▼
Read by QxMD icon Read
search

Bone Strength

keyword
https://www.readbyqxmd.com/read/28812035/bioabsorbable-versus-metal-screw-in-the-fixation-of-tibial-tubercle-transfer-a-cadaveric-biomechanical-study
#1
Janne T Nurmi, Ari Itälä, Raine Sihvonen, Petri Sillanpää, Pekka Kannus, Harri Sievänen, Teppo L N Järvinen
BACKGROUND: In tibial tubercle transfer (TTT) procedures, the osteotomized and transferred tibial tubercle is usually fixed into the host bone using metal screws. PURPOSE: To compare the strength of fixation provided by a single bioabsorbable screw versus a metal screw for TTT. STUDY DESIGN: Controlled laboratory study. METHODS: Twenty-two pairs of human cadaveric tibiae were used to compare the fixation strength of a single 4...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28811353/the-omeract-rheumatoid-arthritis-magnetic-resonance-imaging-mri-scoring-system-updated-recommendations-by-the-omeract-mri-in-arthritis-working-group
#2
Mikkel Østergaard, Charles G Peterfy, Paul Bird, Frédérique Gandjbakhch, Daniel Glinatsi, Iris Eshed, Espen A Haavardsholm, Siri Lillegraven, Pernille Bøyesen, Bo Ejbjerg, Violaine Foltz, Paul Emery, Harry K Genant, Philip G Conaghan
OBJECTIVE: The Outcome Measures in Rheumatology (OMERACT) Rheumatoid Arthritis (RA) Magnetic Resonance Imaging (MRI) scoring system (RAMRIS), evaluating bone erosion, bone marrow edema/osteitis, and synovitis, was introduced in 2002, and is now the standard method of objectively quantifying inflammation and damage by MRI in RA trials. The objective of this paper was to identify subsequent advances and based on them, to provide updated recommendations for the RAMRIS. METHODS: MRI studies relevant for RAMRIS and technical and scientific advances were analyzed by the OMERACT MRI in Arthritis Working Group, which used these data to provide updated considerations on image acquisition, RAMRIS definitions, and scoring systems for the original and new RA pathologies...
August 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28809701/fuzzy-object-skeletonization-theory-algorithms-and-applications
#3
Punam K Saha, Dakai Jin, Yinxiao Liu, Gary E Christensen, Cheng Chen
Skeletonization offers a compact representation of an object while preserving important topological and geometrical features. Literature on skeletonization of binary objects is quite mature. However, challenges involved with skeletonization of fuzzy objects are mostly unanswered. This paper presents a new theory and algorithm of skeletonization for fuzzy objects, evaluates its performance, and demonstrates its applications. A formulation of fuzzy grassfire propagation is introduced; its relationships with fuzzy distance functions, level sets, and geodesics are discussed; and new results are presented...
August 10, 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/28809638/-four-corner-arthrodesis-of-the-wrist-with-dorsal-circular-plate-a-retrospective-monocentric-study
#4
T Zatrapa, D Veigl, J Pech, I Landor, M Šimková
PURPOSE OF THE STUDY Our study aimed to evaluate a group of patients who in the period from 2005 to 2014 underwent a four-corner arthrodesis of the wrist in our department. We also wanted to verify the hypothesis as to whether the use of conventional dorsal plate without the application of bone grafts leads to comparable results as the use of dorsal locking plates and routine application of bone grafts. MATERIAL AND METHODS Throughout the years 2005 to 2014 the four-corner arthrodesis of the wrist was performed in our department in a total of 62 patients, in two cases bilaterally...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28806294/the-tissue-engineered-tendon-bone-interface-in-vitro-and-in-vivo-synergistic-effects-of-adipo-derived-stem-cells-platelet-rich-plasma-and-extracellular-matrix-hydrogel
#5
Rory McGoldrick, Arhana Chattopadhyay, Christopher Crowe, Grace Chiou, Kenneth Hui, Simon Farnebo, Christopher Davis, Anais Le Grand, Molly Jacobs, Hung Pham, James Chang
INTRODUCTION: Suboptimal healing of the tendon bone interface (TBI) remains an unsolved problem. One solution is a biocompatible tissue engineered construct that promotes augmented healing. We hypothesisze that 1.) the presence of Platelet Rich Plasma (PRP) and prolonged in vitro incubation produces tissue engineered tendon bone interface scaffolds with greater reseeding of viable Adipo-derived Stem Cells (ADSC) and 2.) when implanted with extracellular matrix hydrogel, constructs will display superior in vivo strength repair and biocompatibility...
August 3, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28806095/a-midterm-evaluation-of-postoperative-platelet-rich-plasma-injections-on-arthroscopic-supraspinatus-repair-a-randomized-controlled-trial
#6
Jay R Ebert, Allan Wang, Anne Smith, Robert Nairn, William Breidahl, Ming Hao Zheng, Timothy Ackland
BACKGROUND: Platelet-rich plasma (PRP) has been applied as an adjunct to rotator cuff repair to improve tendon-bone healing and potentially reduce the incidence of subsequent tendon retears. PURPOSE: To investigate whether the midterm clinical and radiographic outcomes of arthroscopic supraspinatus repair are enhanced after repeated postoperative applications of PRP. STUDY DESIGN: Randomized controlled trial; Level of evidence, 1. METHODS: A total of 60 patients (30 control; 30 PRP) were initially randomized to receive 2 ultrasound-guided injections of PRP to the tendon repair site at 7 and 14 days after double-row arthroscopic supraspinatus repair or not...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28805705/changes-of-bone-related-minerals-during-denosumab-administration-in-post-menopausal-osteoporotic-patients
#7
Takako Suzuki, Yukio Nakamura, Hiroyuki Kato
OBJECTIVES: This retrospective study included 21 patients with primary osteoporosis who were treated with the anti-resorption drug, denosumab. To date, there has been no detailed report on the changes of bone-related minerals after anti-resorption drug therapy. METHODS: Twenty-one post-menopausal females were retrospectively enrolled. Serum zinc (Zn), magnesium (Mg), iron (Fe), copper (Cu), grip strength, and estimated glomerular filtration rate (eGFR) were examined at one week and 1, 2, 4, 6, 8, 10, and 12 months...
August 13, 2017: Nutrients
https://www.readbyqxmd.com/read/28804727/development-of-a-prediction-model-for-stress-fracture-during-an-intensive-physical-training-program-the-royal-marines-commandos
#8
Maria T Sanchez-Santos, Trish Davey, Kirsten M Leyland, Adrian J Allsopp, Susan A Lanham-New, Andrew Judge, Nigel K Arden, Joanne L Fallowfield
BACKGROUND: Stress fractures (SFs) are one of the more severe overuse injuries in military training, and therefore, knowledge of potential risk factors is needed to assist in developing mitigating strategies. PURPOSE: To develop a prediction model for risk of SF in Royal Marines (RM) recruits during an arduous military training program. STUDY DESIGN: Case-control study; Level of evidence, 3. METHODS: RM recruits (N = 1082; age range, 16-33 years) who enrolled between September 2009 and July 2010 were prospectively followed through the 32-week RM training program...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28803758/association-between-body-weight-and-proximal-tibial-bone-mineral-density-after-bilateral-total-knee-arthroplasty
#9
Yoshinori Ishii, Hideo Noguchi, Junko Sato, Hana Ishii, Koji Todoroki, Shin-Ichi Toyabe
BACKGROUND: Proximal tibial bone mineral density (BMD) has been studied for its potential impact on subsidence and loosening of the tibial component after total knee arthroplasty (TKA). However, no known studies of proximal tibial BMD after TKA have evaluated the effect of major impact factors such as body weight (BW), muscle strength, and level of activity. We aim to determine whether factors such as level of activity, quadriceps strength, BW, gender, age, and prosthetic design affect proximal tibial BMD over the mid- to long-term following TKA...
August 10, 2017: Knee
https://www.readbyqxmd.com/read/28803246/biofunctional-ionic-doped-calcium-phosphates-silk-fibroin-composites-for-bone-tissue-engineering-scaffolding
#10
S Pina, R F Canadas, G Jiménez, M Perán, J A Marchal, R L Reis, J M Oliveira
The treatment and regeneration of bone defects caused by traumatism or diseases have not been completely addressed by current therapies. Lately, advanced tools and technologies have been successfully developed for bone tissue regeneration. Functional scaffolding materials such as biopolymers and bioresorbable fillers have gained particular attention, owing to their ability to promote cell adhesion, proliferation, and extracellular matrix production, which promote new bone growth. Here, we present novel biofunctional scaffolds for bone regeneration composed of silk fibroin (SF) and β-tricalcium phosphate (β-TCP) and incorporating Sr, Zn, and Mn, which were successfully developed using salt-leaching followed by a freeze-drying technique...
August 12, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28801687/human-mesenchymal-stromal-cell-sheet-enhances-allograft-repair-in-a-mouse-model
#11
Xifu Shang, Bing Shu, Yongjun Wang, Zhengliang Luo, Guangxi Wang, Shane Barton, Massimo Max Morandi, Christopher Kevil, Yufeng Dong
To determine whether cell sheets generated with long-term passaged (P10) aging human mesenchymal stromal cells (MSCs) could be used for bone tissue regeneration as tissue engineered periosteum in a femoral allograft mouse model similar to fresh passaged (P3) young MSCs. At 3 weeks after transplantation of MSC sheets, results showed more bony callus formed between allograft and host bone ends in both young P3 MSC and aged P10 MSC sheet-wrapped groups when compared to allograft alone. At 6 weeks, while both MSC sheet-wrapped allografts showed more bony callus formation when compared to allograft alone groups, the bony callus size in aged P10 MSC sheet groups was significantly less than young P3 MSC sheet groups...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28800742/an-intramedullary-echidna-pin-for-fixation-of-comminuted-clavicle-fractures-a-biomechanical-study
#12
David Ackland, Ian Griggs, Patrick Hislop, Wen Wu, Minoo Patel, Martin Richardson
BACKGROUND: Intramedullary fixation of comminuted mid-shaft clavicle fractures has traditionally been employed with satisfactory clinical outcomes; however, pins with smooth surfaces may protrude from the bone and are prone to migration, while some threaded pins are difficult to remove post-operatively. The aim of this proof-of-concept study was to develop and evaluate the biomechanical strength of a novel intramedullary Echidna pin device designed to maintain fracture reduction, resist migration and facilitate ease of post-operative removal...
August 11, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28798911/tissue-engineering-approaches-in-the-design-of-healthy-and-pathological-in-vitro-tissue-models
#13
REVIEW
Silvia Caddeo, Monica Boffito, Susanna Sartori
In the tissue engineering (TE) paradigm, engineering and life sciences tools are combined to develop bioartificial substitutes for organs and tissues, which can in turn be applied in regenerative medicine, pharmaceutical, diagnostic, and basic research to elucidate fundamental aspects of cell functions in vivo or to identify mechanisms involved in aging processes and disease onset and progression. The complex three-dimensional (3D) microenvironment in which cells are organized in vivo allows the interaction between different cell types and between cells and the extracellular matrix, the composition of which varies as a function of the tissue, the degree of maturation, and health conditions...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/28797891/the-impact-of-peripheral-serotonin-on-leptin-brain-serotonin-axis-bone-metabolism-and-strength-in-growing-rats-with-experimental-chronic-kidney-disease
#14
Dariusz Pawlak, Tomasz Domaniewski, Beata Znorko, Ewa Oksztulska-Kolanek, Paweł Lipowicz, Michał Doroszko, Malgorzata Karbowska, Krystyna Pawlak
Chronic kidney disease (CKD) results in decreased bone strength. Serotonin (5-HT) is one of the critical regulators of bone health, fulfilling distinct functions depending on its synthesis site: brain-derived serotonin (BDS) favors osteoblast proliferation, whereas gut-derived serotonin (GDS) inhibits it. We assessed the role of BDS and peripheral leptin in the regulation of bone metabolism and strength in young rats with 5/6 nephrectomy. BDS synthesis was accelerated during CKD progression. Decreased peripheral leptin in CKD rats was inversely related to BDS content in the hypothalamus, brainstem and frontal cortex...
August 7, 2017: Bone
https://www.readbyqxmd.com/read/28797809/the-role-of-titanium-dioxide-on-the-morphology-microstructure-and-bioactivity-of-grafted-cellulose-hydroxyapatite-nanocomposites-for-a-potential-application-in-bone-repair
#15
Saeed Saber-Samandari, Hamed Yekta, Sara Ahmadi, Kadhim Alamara
Fabrication and characterization of a novel 3D nanocomposite scaffold have been reported in this research. The purpose of developing this new 3D nanocomposite scaffolds is introducing an alternative treatment for bone tissue replacement. Outcomes confirmed that the morphology, microstructure and mechanical properties of synthesized 3D nanocomposite scaffolds closely mimics the properties of real bone tissue. The 3D nanocomposite scaffolds compose of nanoparticle hydroxyapatite which is embedded in the semi-IPN of polyacrylamide-grafted cellulose by free radical polymerization...
August 7, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28797745/measuring-fracture-toughness-in-biological-materials
#16
David Taylor
Many biological materials fail by cracking. Examples are bone fractures, contact damage in eggs, splits in bamboo culm and defects in cartilage. The mechanical property that best describes failure by cracking is fracture toughness, which quantifies the ease with which cracks propagate and defines a material's tolerance for pre-existing cracks and other stress concentrating features. The measurement of fracture toughness presents some challenges, especially for biological materials. To obtain valid results requires care and, in many cases, considerable ingenuity to design an appropriate specimen and test protocol...
July 5, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28796792/divergent-selection-on-home-pen-locomotor-activity-in-a-chicken-model-selection-program-genetic-parameters-and-direct-response-on-activity-and-body-weight
#17
Joergen B Kjaer
General locomotor activity (GLA) in poultry has attracted attention, as it negatively influences production costs (energy expenditure and feed consumption) and welfare parameters (bone strength, litter quality, feather pecking and cannibalism). Laying hen lines diverging in the average level of spontaneous locomotor activity in the home pen were developed by genetic selection using the founder New Hampshire line. Activity was recorded using RFID technology at around five weeks of age during four to five days in the home pen...
2017: PloS One
https://www.readbyqxmd.com/read/28795328/severe-hemorrhagic-shock-leads-to-a-delayed-fracture-healing-and-decreased-bone-callus-strength-in-a-mouse-model
#18
Katrin Bundkirchen, Christian Macke, Janin Reifenrath, Luisa Marilena Schäck, Sandra Noack, Borna Relja, Philipp Naber, Bastian Welke, Michael Fehr, Christian Krettek, Claudia Neunaber
BACKGROUND: Multiple trauma is frequently associated with hemorrhagic shock and fractures of the extremities. Clinically, the rate of impaired fracture healing (delayed healing and nonunion) seems to be increased in patients with multiple injuries compared with patients with isolated fractures. As the underlying pathogenesis remains poorly understood, we aimed to analyze the biomechanical properties during fracture healing in a murine model. QUESTIONS: The aim of this study was to determine whether fracture healing after severe hemorrhagic shock results in (1) delayed bridging as determined by macroscopic and radiographic assessment, (2) altered conditions of callus components as determined by µCT, and (3) decreased maximum bending moment measured by a three-point-bending test compared with ordinary fracture healing...
August 9, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28795210/-arthrodesis-of-the-trapeziometacarpal-joint
#19
REVIEW
T Pillukat, M Mühldorfer-Fodor, R Fuhrmann, J Windolf, J van Schoonhoven
OBJECTIVE: Bony fusion of the trapeziometacarpal joint. INDICATIONS: High demands concerning stability and strength of the thumb in primary or secondary osteoarthritis (e.g., posttraumatic osteoarthritis following injuries to the carpometacarpal joint of the thumb); instability in the absence of osteoarthritis due to malformations, ligamentous laxicity, and joint hypermobility; malformations; improvement of hand function in neurological disorders; salvage procedure after carpometacarpal arthroplasty provided bone stock is sufficient...
August 9, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28795003/resistance-training-for-children-and-adolescents
#20
REVIEW
Allison M Myers, Nicholas W Beam, Joseph D Fakhoury
As more children and adolescents are becoming involved in exercise and school or community based athletics, attention is turned towards proper training and conditioning to optimize performance, stimulate athletic development and ensure safety while tolerating long-term competition. Resistance training (RT) refers to the methodology of ensuring such optimal performance and safety. This is a common component of sports and physical fitness in schools and organized athletic programs around the country. RT is a physical conditioning program that involves various training techniques (e...
July 2017: Translational pediatrics
keyword
keyword
58460
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"