Abstract:
:A series of Sr-substituted hydroxyapatites, (Sr(x)Ca(1-)(x))(5)(PO(4))(3)OH, where x=0.00, 0.25, 0.50, 0.75 and 1.00, were made by a standard wet chemical route and investigated using X-ray diffraction (XRD), Rietveld refinement and Raman spectroscopy. We report apatites manufactured by two synthesis routes under 90 degrees C, and only the fully Sr-substituted sample had a small amount of an impurity phase, which is believed to be strontium pyrophosphate. Lattice parameters (a and c), unit cell volume and density were shown to increase linearly with strontium addition and were consistent with the addition of a slightly larger and heavier ion (Sr) in place of Ca. XRD Lorentzian peak widths increased to a maximum at x=0.50, then decreased with increasing Sr content. This indicated an increase in crystallite size when moving away from the x=0.50 composition (d approximately 9.4nm). There was a slight preference for strontium to enter the Ca(II) site in the mixed apatites (6 to 12% depending on composition). The position of the Raman band attributed to v(1)PO(4)(3-) at around 963cm(-1) in hydroxyapatite decreased linearly to 949cm(-1) at full Sr-substitution. The full width at half maximum of this peak also correlated well and increased linearly with increasing crystallite size calculated from XRD.
journal_name
Acta Biomaterjournal_title
Acta biomaterialiaauthors
O'Donnell MD,Fredholm Y,de Rouffignac A,Hill RGdoi
10.1016/j.actbio.2008.04.018subject
Has Abstractpub_date
2008-09-01 00:00:00pages
1455-64issue
5eissn
1742-7061issn
1878-7568pii
S1742-7061(08)00112-8journal_volume
4pub_type
杂志文章abstract::Cardiac tissue engineering is focused on obtaining functional cardiomyocyte constructs to provide an alternative to cellular cardiomyoplasty. Mechanical stimuli have been shown to stimulate protein expression and the differentiation of mammalian cells from contractile tissues. Our aim was to obtain a flexible scaffold...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2006.12.006
更新日期:2007-07-01 00:00:00
abstract::Nerve fibers of the peripheral nervous system (PNS) have a remarkable ability to regenerate up to an almost complete recovery of normal function following a crush or a Sunderland Type II injury. This process is governed by glial cells, known as Schwann cells, through their unique capacity to dedifferentiate into cells...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2019.06.054
更新日期:2019-09-15 00:00:00
abstract::First-principles calculations were carried out to reveal local atomic arrangements and thermodynamic stability of substitutional divalent cations of Mg(2+), Zn(2+), Sr(2+) and Ba(2+) in tricalcium phosphates (TCPs). There are two modifications of α-TCP and β-TCP, and a number of inequivalent Ca sites are present in th...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2015.05.014
更新日期:2015-09-01 00:00:00
abstract::Natural polymer materials have attracted great attention in the field of hemostasis because of their wide range of source, nontoxicity, hydrophilicity, and air permeability. In the present study, two natural polymers composed of carboxymethyl chitosan (CMCS) and sodium carboxymethylcellulose (CMCNa) plus γ-(2,3-epoxyp...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2020.07.043
更新日期:2020-09-15 00:00:00
abstract::In this study, the Cu-doping mechanism of Biphasic Calcium Phosphate (BCP) was thoroughly investigated, as was its ionic release behavior, in order to elucidate cytotoxicity features of these bioceramics. BCP are composed of hydroxyapatite (Ca10(PO4)6(OH)2) and β-TCP (Ca3(PO4)2). The two phases present two different d...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2017.10.028
更新日期:2018-01-01 00:00:00
abstract::This study characterizes the cross-linking of electrospun elastin and the mechanical properties of suture-reinforced 1.5mm internal diameter electrospun tubes composed of blended polydioxanone (PDO) and soluble elastin. Several tube configurations were tested to assess the effects of reinforcement on tube mechanical p...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2007.08.001
更新日期:2008-01-01 00:00:00
abstract::As efficient drug carriers, stimuli-responsive mesoporous silica nanoparticles are at the forefront of research on drug delivery systems. An acid-responsive system based on silyl ether has been applied to deliver a hybrid prodrug. Thiol-ene click chemistry has been successfully utilized for tethering this prodrug to m...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2017.01.062
更新日期:2017-03-15 00:00:00
abstract::To reduce the biocorrosion rate by surface modification, Mg-Ca alloy (1.4wt.% Ca content) was soaked in three alkaline solutions (Na(2)HPO(4), Na(2)CO(3) and NaHCO(3)) for 24h, respectively, and subsequently heat treated at 773K for 12h. Scanning electron microscopy and energy-dispersive spectroscopy results revealed ...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2009.01.048
更新日期:2009-09-01 00:00:00
abstract::Calcium phosphate based bioceramics have been widely used for orthopedic applications due to their chemical similarity to natural bone. The Ca/P stoichiometry of calcium phosphates strongly influences their performance under biological conditions, which have not yet been fully elucidated to date. For this reason, the ...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2008.02.025
更新日期:2008-09-01 00:00:00
abstract::Antibacterial and remineralizing dental composites and adhesives were recently developed to inhibit biofilm acids and combat secondary caries. It is not clear what effect these materials will have on dental pulps in vivo. The objectives of this study were to investigate the antibacterial and remineralizing restoration...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2014.02.033
更新日期:2014-06-01 00:00:00
abstract::Apatite (Ca5(PO4)3OH) has long been considered as an excellent biomaterial to promote bone repairs and implant. Apatite formation induced by negatively charged nanocrystalline TiO2 coatings soaked in simulated body fluid (SBF) was investigated using in situ quartz crystal microbalance (QCM), scanning electron microsco...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2007.10.003
更新日期:2008-05-01 00:00:00
abstract::Stimuli responsive polyelectrolyte nanoparticles have been developed for chemo-photothermal destruction of breast cancer cells. This novel system, called layer by layer Lipo-graph (LBL Lipo-graph), is composed of alternate layers of graphene oxide (GO) and graphene oxide conjugated poly (l-lysine) (GO-PLL) deposited o...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2017.10.040
更新日期:2018-01-01 00:00:00
abstract::Well-organized composite formations such as hierarchical nested-network (NN) structure in bone tissue and reticular connective tissue present remarkable mechanical strength and play a crucial role in achieving physical and biological functions for living organisms. Inspired by these delicate microstructures in nature,...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2018.02.003
更新日期:2018-04-01 00:00:00
abstract::Electrical stimulation of the muscle has been proven efficacious in preventing atrophy and/or reanimating paralyzed muscles. Intramuscular electrodes made from metals have significantly higher Young's Moduli than the muscle tissues, which has the potential to cause chronic inflammation and decrease device performance....
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2019.12.021
更新日期:2020-02-01 00:00:00
abstract::There is an unmet need for improved, effective tissue engineering strategies to replace or repair bone damaged through disease or injury. Recent research has focused on developing biomaterial scaffolds capable of spatially and temporally releasing combinations of bioactive growth factors, rather than individual molecu...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2014.05.025
更新日期:2014-10-01 00:00:00
abstract::The goal of this study was to evaluate three-dimensional (3-D) poly(ethylene glycol) (PEG) hydrogels as a culture system for studying corneal keratocytes. Bovine keratocytes were subcultured in DMEM/F-12 containing 10% fetal bovine serum (FBS) through passage 5. Primary keratocytes (P0) and corneal fibroblasts from pa...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2008.05.007
更新日期:2008-09-01 00:00:00
abstract::Vascular stiffening is associated with the prognosis of cardiovascular disease (CVD). Endothelial dysfunction, as shown by reduced vasodilation and increased vasoconstriction, not only affects vascular tone, but also accelerates the progression of CVD. However, the precise effect of vascular stiffening on endothelial ...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2019.10.013
更新日期:2019-12-01 00:00:00
abstract::The influence of amount of intermetallics on the degradation of as-extruded Mg-Nd alloys with different contents of Nd was investigated via immersion testing in DMEM+10% FBS under cell culture conditions and subsequent microstructural characterizations. It is found that the presence of intermetallic particles Mg41Nd5 ...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2020.11.050
更新日期:2021-02-01 00:00:00
abstract::Cellular transplantation is now closer to becoming a practical clinical strategy to repair, regenerate or restore the function of skin, muscle, nerves and pancreatic islets. In this study we sought to develop a simple injectable collagen matrix that would preserve the normal cellular organization of skin cells. Three ...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2011.04.024
更新日期:2011-08-01 00:00:00
abstract::Spherical bioactive glass 13-93 particles, with a particle size distribution of 50-125 microm, were combined with bioabsorbable poly-L,DL-lactide 70/30 using twin-screw extrusion. The composite rods containing 0, 20, 30, 40 and 50 wt% of bioactive glass were further self-reinforced by drawing to a diameter of approxim...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2004.11.002
更新日期:2005-03-01 00:00:00
abstract:UNLABELLED:The development of scaffolds for bone filling of large defects requires an understanding of angiogenesis and vascular guidance, which are crucial processes for bone formation and healing. There are few investigations on the ability of a scaffold to support blood vessel guidance and it this is of great import...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2016.04.039
更新日期:2016-07-01 00:00:00
abstract::A rapidly expanding literature broadly documents the impact of biophysical cues on cellular behaviors. In spite of increasing research efforts in this field, the underlying signaling processes are poorly understood. One of the candidate molecules for being involved in mechanotransduction is focal adhesion kinase (FAK)...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2012.07.004
更新日期:2012-12-01 00:00:00
abstract:UNLABELLED:Small interfering RNAs (siRNAs) are extensively studied due to their promising potential as therapeutic agents for a wide variety of diseases, including cancer. However, efficient delivery of siRNAs to target cells and tissues is problematic due to a lack of suitable delivery vehicles. In this work, we devel...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2015.07.026
更新日期:2015-10-01 00:00:00
abstract::The development of functional therapies for corneal repair and regeneration is a pressing issue. Corneal stroma provides the principal functions of the cornea. However, because of the highly organized nature of the stromal matrix, the attempts to reproduce corneal stroma might follow a scar model. Here, we have develo...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2018.06.005
更新日期:2018-07-15 00:00:00
abstract::Mesoporous materials are of high interest as implant coatings to receive an enhanced osseointegration. In this study, titanium implants coated with mesoporous TiO(2) thin films have been evaluated both in vitro and in vivo. Material characterization showed that, with partly crystalline TiO(2) (anatase), long-range-ord...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2012.07.035
更新日期:2012-12-01 00:00:00
abstract::Bone-like materials comprise carbonated-hydroxyapatite nanocrystals (c-Ap) embedding a fibrillar collagen matrix. The mineral particles stiffen the nanocomposite by tight attachment to the protein fibrils creating a high strength and toughness material. The nanometer dimensions of c-Ap crystals make it very challengin...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2020.09.004
更新日期:2021-01-15 00:00:00
abstract::The synthesis of microspheres for tissue regeneration requires good control over the particle size and size distribution. This is particularly important when considering the immune response that may be triggered by the presence of particles in tissue. This report outlines the design of an injectable microsphere system...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2019.03.014
更新日期:2019-04-15 00:00:00
abstract::Multifunctional bioactive materials with the ability to stimulate osteogenesis and angiogenesis of stem cells play an important role in the regeneration of bone defects. However, how to develop such biomaterials remains a significant challenge. In this study, we prepared mesoporous silica nanospheres (MSNs) with unifo...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2015.04.019
更新日期:2015-07-01 00:00:00
abstract::Several processing technologies and engineering strategies have been combined to create scaffolds with superior performance for efficient tissue regeneration. Cartilage tissue is a good example of that, presenting limited self-healing capacity together with a high elasticity and load-bearing properties. In this work, ...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2018.03.047
更新日期:2018-05-01 00:00:00
abstract::The development of an in situ formed pH-responsive theranostic nanocomposite for anticancer drug delivery and computed tomography (CT) imaging was reported. β-cyclodextrin-{poly(lactide)-poly(2-(dimethylamino) ethyl methacrylate)-poly[oligo(2-ethyl-2-oxazoline)methacrylate]}21 [β-CD-(PLA-PDMAEMA-PEtOxMA)21] unimolecul...
journal_title:Acta biomaterialia
pub_type: 杂志文章
doi:10.1016/j.actbio.2017.06.003
更新日期:2017-08-01 00:00:00