keyword
MENU ▼
Read by QxMD icon Read
search

Bone Strength

keyword
https://www.readbyqxmd.com/read/28102084/long-bone-properties-and-development-are-affected-by-caponisation-and-breed-in-polish-fowls
#1
E Tomaszewska, M Kwiecień, S Muszyński, P Dobrowolski, K Kasperek, T Blicharski, G Jeżewska-Witkowska, E R Grela
1. The aim of the study was to investigate the effects of caponisation on bone development of males of two native breeds in Poland. 2. The weight, length and cross sectional area of tibiae and femora were measured, densitometric measurements and tests of strength were determined. and dimensions were calculated. 3. Breed and caponisation did not influence bone weight and length. Higher mechanical strength of the femur was found in entire males, mainly in the Polbar breed. Tibial strength was reduced in capons of the Green Partridge breed...
January 19, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28101146/bone-health-in-hiv-and-hepatitis-b-or-c-infections
#2
REVIEW
Emmanuel Biver, Alexandra Calmy, René Rizzoli
Chronic infections with human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV) add to age-dependent bone loss and may contribute to lower bone strength in the elderly. In this review, we report recent highlights on the epidemiology of bone fragility in chronic viral infections with HIV, HCV and HBV, its physiopathology and discuss the interference of antiviral therapies with bone metabolism. Chronic infections influence bone through the interactions between risk factors for bone fragility and falls (which are highly prevalent in infected patients), virus activity and antiviral drugs...
January 2017: Therapeutic Advances in Musculoskeletal Disease
https://www.readbyqxmd.com/read/28097725/increased-cortical-porosity-in-women-with-hip-fracture
#3
D Sundh, A G Nilsson, M Nilsson, L Johansson, D Mellström, M Lorentzon
BACKGROUND: Hip fractures cause increased mortality and disability and consume enormous healthcare resources. Only 46% of hip fracture patients have osteoporosis at the total hip according to dual-energy X-ray absorptiometry (DXA) measurement. Cortical porosity increases with ageing and is believed to be important for bone strength. OBJECTIVE: To investigate whether older women with hip fracture have higher cortical porosity than controls, and if so whether this difference is independent of clinical risk factors and areal bone mineral density (aBMD)...
January 18, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28096061/connexin37-deficiency-alters-organic-bone-matrix-cortical-bone-geometry-and-increases-wnt-%C3%AE-catenin-signaling
#4
Rafael Pacheco-Costa, Jay R Kadakia, Emily G Atkinson, Joseph M Wallace, Lilian I Plotkin, Rejane D Reginato
Deletion of connexin (Cx) 37 in mice leads to increased cancellous bone mass due to defective osteoclast differentiation. Paradoxically; however, Cx37-deficient mice exhibit reduced cortical thickness accompanied by higher bone strength, suggesting a contribution of Cx37 to bone matrix composition. Thus, we investigated whether global deletion of Cx37 alters the composition of organic bone extracellular matrix. Five-month-old Cx37(-/-) mice exhibited increased marrow cavity area, and periosteal and endocortical bone surface resulting in higher total area in tibia compared to Cx37(+/+) control mice...
January 13, 2017: Bone
https://www.readbyqxmd.com/read/28095516/effect-of-nanofeatured-topography-on-ceria-stabilized-zirconia-alumina-nanocomposite-on-osteogenesis-and-osseointegration
#5
Yoko Oshima, Fuminori Iwasa, Keita Tachi, Kazuyoshi Baba
PURPOSE: The objective of this study was to evaluate the osteogenic and osseointegration capability of the Ce-tetragonal zirconia polycrystal (TZP)-based nanostructured zirconia/alumina composite (Ce-TZP/Al₂O₃) that was treated with hydrofluoric acid (HF). MATERIALS AND METHODS: Osteogenic MC3T3-E1 cells were cultured on acid-etched titanium (AETi) disks and Ce-TZP/Al₂O₃ disks without HF treatment (Zr[0%]), with 4% HF treatment (Zr[4%]), or with 55% HF treatment (Zr[55%]) for 24 hours, and biologic responses were compared among four conditions in vitro...
January 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28095515/effects-of-ultraviolet-photofunctionalization-on-bone-augmentation-and-integration-capabilities-of-titanium-mesh-and-implants
#6
Makoto Hirota, Takayuki Ikeda, Masako Tabuchi, Tomomichi Ozawa, Iwai Tohnai, Takahiro Ogawa
PURPOSE: Ultraviolet (UV)-mediated photofunctionalization has earned considerable attention for the enhancement of the biologic capabilities of titanium. The effects of photofunctionalization on bone augmentation and gap closure were examined using titanium implants and mesh in a rat femur model. MATERIALS AND METHODS: An acid-etched titanium implant (4-mm length, 1-mm diameter) was placed in the gluteal tuberosity that resembles a knife-edge-like edentulous ridge...
January 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28095112/autogenous-bone-particle-titanium-fibre-composites-for-bone-regeneration-in-a-rabbit-radius-critical-size-defect-model
#7
Huanxin Xie, Ye Ji, Qi Tian, Xintao Wang, Nan Zhang, Yicai Zhang, Jun Xu, Nanxiang Wang, Jinglong Yan
PURPOSE: To explore the effects of autogenous bone particle/titanium fibre composites on repairing segmental bone defects in rabbits. MATERIALS AND METHODS: A model of bilateral radial bone defect was established in 36 New Zealand white rabbits which were randomly divided into 3 groups according to filling materials used for bilaterally defect treatment: in group C, 9 animal bone defect areas were prepared into simple bilateral radius bone defect (empty sham) as the control group; 27 rabbits were used in groups ABP and ABP-Ti...
January 17, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28094424/ex-vivo-torsional-properties-of-a-2-5-mm-veterinary-interlocking-nail-system-in-canine-femurs-comparison-with-a-2-4-mm-limited-contact-bone-plate
#8
Aline S Macedo, Noel M M Moens, John Runciman, Tom W G Gibson, Bruno W Minto
OBJECTIVE: To evaluate the torsional properties of the Targon(®) Vet Nail System (TVS) in small canine femurs and to compare these properties to those of the 2.4 mm LC-DCP(®) plates. METHODS: Thirty-six cadaveric femurs were allocated to three groups (n = 12). In all bones, points just distal to the lesser trochanter and just proximal to the fabellae were marked and a midshaft transverse osteotomy was performed. Group 1: bones were fixed with the 2.5 mm TVS with the bolts applied at the pre-identified marks...
January 17, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28094246/development-of-sr-incorporated-biphasic-calcium-phosphate-bone-cement
#9
Hui Zhu, Dagang Guo, Wenli Qi, Kewei Xu
To follow the design strategy of traditional biphasic calcium phosphate (BCP) ceramic, in the present study, strontium-doped biphasic calcium phosphate bone cement (Sr-BCPC) composites comprising Sr-β-tricalcium phosphate (TCP)/Sr-hydroxyapatite (HAP) had been prepared for the first time using Sr x -β-TCP/tetracalcium phosphate (TTCP) as a cement powder and diluted phosphoric acid as a cement liquid. The phase composition, setting time, compressive strength, washout resistance, in vitro degradation rate, microstructure evolutions, hydration dynamics and cytotoxicity of Sr-BCPC at various Sr contents were intensively investigated...
January 17, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28094241/gelatin-freeze-casting-of-biomimetic-titanium-alloy-with-anisotropic-and-gradient-pore-structure
#10
Lei Zhang, Ronan Le Coz-Botrel, Charlotte Beddoes, Terje Sjöström, Bo Su
Titanium is a material commonly used for dental and orthopaedic implants. However, due to large differences in properties between the titanium metal and the natural bone, stress shielding has been observed in the surrounding area, resulting in bone atrophy, and thus has raised concerns of the use of this material. Ideally implant materials should possess similar properties to the surrounding tissues in order to distribute the load as the joint would naturally, while also possessing a similar porous structure to the bone to enable interaction with the surrounding material...
January 17, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28094026/nanoporous-hydroxyapatite-sodium-titanate-bilayer-on-titanium-implants-for-improved-osteointegration
#11
A Carradò, F Perrin-Schmitt, Q V Le, M Giraudel, C Fischer, G Koenig, L Jacomine, L Behr, A Chalom, L Fiette, A Morlet, G Pourroy
OBJECTIVE: The aim of this study was to improve the strength and quality of the titanium-hydroxyapatite interface in order to prevent long-term failure of the implanted devices originating from coating delamination and to test it in an in-vivo model. METHODS: Ti disks and dental commercial implants were etched in Kroll solution. Thermochemical treatments of the acid-etched titanium were combined with sol-gel hydroxyapatite (HA) coating processes to obtain a nanoporous hydroxyapatite/sodium titanate bilayer...
January 13, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28093375/biomechanical-strength-and-failure-mechanism-of-different-tubercula-refixation-methods-within-the-framework-of-an-arthroplasty-for-shoulder-fracture
#12
Jörg Fleischer, Alexandra Schleyer, Roman Nassutt, Ulrike Grittner, Ishaq Ojodu, Sascha Jörg Hopp
BACKGROUND: Tuberosity repair in shoulder fracture prosthesis implantation still remains a challenge often leading to poor functional outcomes, despite a variety of materials and suggested suture patterns. We aimed to evaluate, which forces currently used suture and cerclage materials withstand and to assess whether they are useful with regard to stability of reconstruction of tuberosities and which failure modes they display. MATERIAL AND METHODS: Using sheep infraspinatus tendons with attached tuberosities three different suture materials (suture 1: Ethibond size 2; suture 2: Orthocord size 2; suture 3: Fiberwire size 5) and a 0...
January 13, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28093043/electrospun-yarn-reinforced-nanoha-composite-matrix-as-a-potential-bone-substitute-for-enhanced-regeneration-of-segmental-defects
#13
Anitha A Nair, John Joseph, Deepthy Menon, Shantikumar Nair, Manitha Nair
Nanohydroxyapatite (HA) is a well-established synthetic bone substitute with excellent osteoconduction and osteointegration. However, brittleness coupled with slow degradation curtail its load bearing and bone regeneration potential respectively. To address these limitations, nanoHA composite matrix reinforced with electrospun 1D fibrous yarns was fabricated and tested in vitro and in vivo. Different weight percentages (5, 10, 15 wt%) and varying lengths (short and continuous) of PLLA yarns were randomly dispersed in a gelatinous matrix containing nanoHA...
January 17, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28090744/effects-of-different-hierarchical-hybrid-micro-nanostructure-surfaces-on-implant-osseointegration
#14
Bingkun Cheng, Qiang Niu, Yajun Cui, Wei Jiang, Yunzhuan Zhao, Liang Kong
BACKGROUND: Hierarchical hybrid micro/nanostructure implant surfaces are considered to better mimic the hierarchical structure of bone and the nanostructures substantively influence osseointegration through managing cell behaviors. PURPOSE: To enhance implant osseointegration for further clinical application, we evaluated the material properties and osseointegration effects of hierarchical surfaces with different nano-morphologies, using a rat model. MATERIALS AND METHODS: Two representative surface fabrication methods, hydrofluoric (HF) acid etching combined with anodization (HF + AN) or magnetron sputtering (HF + MS), were selected...
January 15, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28089826/comparison-of-histologic-healing-and-biomechanical-characteristics-between-repair-techniques-for-a-delaminated-rotator-cuff-tear-in-rabbits
#15
Sang-Jin Cheon, Jung-Han Kim, Heui-Chul Gwak, Chang-Wan Kim, Jeon-Kyo Kim, Ji-Hwan Park
BACKGROUND: The purpose of this study was to compare histologic healing and biomechanical characteristics between 2 repair techniques (layer by layer, repair of each layer to bone separately; and whole layer, repair of each layer to the bone en masse) for delaminated rotator cuff tear. MATERIALS AND METHODS: Rabbits were used as subjects and classified into 2 groups: group A, right side, the layer-by-layer repair group; and group B, left side, the whole-layer repair group...
January 12, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28088669/micro-mechanical-properties-of-the-tendon-to-bone-attachment
#16
Alix C Deymier, Yiran An, John J Boyle, Andrea G Schwartz, Victor Birman, Guy M Genin, Stavros Thomopoulos, Asa H Barber
: The tendon-to-bone attachment (enthesis) is a complex hierarchical tissue that connects stiff bone to compliant tendon. The attachment site at the micrometer scale exhibits gradients in mineral content and collagen orientation, which likely act to minimize stress concentrations. The physiological micromechanics of the attachment thus define resultant performance, but difficulties in sample preparation and mechanical testing at this scale have restricted understanding of structure-mechanical function...
January 11, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28088646/bone-microarchitecture-in-adolescent-boys-with-autism-spectrum-disorder
#17
Ann M Neumeyer, Natalia Cano Sokoloff, Erin McDonnell, Eric A Macklin, Christopher J McDougle, Madhusmita Misra
BACKGROUND: Boys with autism spectrum disorder (ASD) have lower areal bone mineral density (aBMD) than typically developing controls (TDC). Studies of volumetric BMD (vBMD) and bone microarchitecture provide information about fracture risk beyond that provided by aBMD but are currently lacking in ASD. OBJECTIVES: To assess ultradistal radius and distal tibia vBMD, bone microarchitecture and strength estimates in adolescent boys with ASD compared to TDC. DESIGN/METHODS: Cross-sectional study of 34 boys (16 ASD, 18 TDC) that assessed (i) aBMD at the whole body (WB), WB less head (WBLH), hip and spine using dual X-ray absorptiometry (DXA), (ii) vBMD and bone microarchitecture at the ultradistal radius and distal tibia using high-resolution peripheral quantitative CT (HRpQCT), and (iii) bone strength estimates (stiffness and failure load) using micro-finite element analysis (FEA)...
January 11, 2017: Bone
https://www.readbyqxmd.com/read/28088072/microstructural-mechanical-and-corrosion-characteristics-of-heat-treated-mg-1-2zn-0-5ca-wt-alloy-for-use-as-resorbable-bone-fixation-material
#18
Hamdy Ibrahim, Andrew D Klarner, Behrang Poorganji, David Dean, Alan A Luo, Mohammad Elahinia
Mg-Zn-Ca alloys have grabbed most of the recent attention in research attempting to develop an Mg alloy for bone fixation devices due to their superior biocompatibility. However, early resorption and insufficient strength remain the main problems that hinder their use. Heat treatment has previously been thoroughly studied as a post-shaping process, especially after the fabrication of complex parts (e.g. porous structures) by 3D-printing or powder metallurgy. In this work, the effect of heat treatment on Mg-1...
January 5, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28087448/fabrication-and-characterization-of-electrospun-cellulose-nano-hydroxyapatite-nanofibers-for-bone-tissue-engineering
#19
Chenghong Ao, Yan Niu, Ximu Zhang, Xu He, Wei Zhang, Canhui Lu
Nanofibrous scaffolds from cotton cellulose and nano-hydroxyapatite (nano-HA) were electrospun for bone tissue engineering. The solution properties of cellulose/nano-HA spinning dopes and their associated electrospinnability were characterized. Morphological, thermal and mechanical properties of the electrospun cellulose/nano-HA nanocomposite nanofibers (ECHNN) were measured and the biocompatibility of ECHNN with human dental follicle cells (HDFCs) was evaluated. Scanning electron microscope (SEM) images indicated that the average diameter of ECHNN increased with a higher nano-HA loading and the fiber diameter distributions were well within the range of natural ECM (extra cellular matrix) fibers (50-500nm)...
January 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28079810/risk-of-vertebral-compression-fractures-in-multiple-myeloma-patients-a-finite-element-study
#20
D Anitha, Baum Thomas, Kirschke S Jan, Karupppasamy Subburaj
The purpose of this study was to develop and validate a finite element (FE) model to predict vertebral bone strength in vitro using multidetector computed tomography (MDCT) images in multiple myeloma (MM) patients, to serve as a complementing tool to assess fracture risk. In addition, it also aims to differentiate MM patients with and without vertebral compression fractures (VCFs) by performing FE analysis on vertebra segments (T1-L5) obtained from in vivo routine MDCT imaging scans. MDCT-based FE models were developed from the in vitro vertebrae samples and were then applied to the in vivo vertebrae segments of MM patients (n = 4) after validation...
January 2017: Medicine (Baltimore)
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"