Abstract:
:A micro-X-ray diffraction (micro-XRD) technique has been employed to determine the phases in two superelastic nickel-titanium orthodontic wires that exhibit shape memory in the oral environment and one superelastic nickel-titanium wire that does not exhibit shape memory in vivo. The micro-XRD analyses were performed over the clinically relevant temperature range of 0-55 degrees C, which corresponds to the ingestion of cold and hot liquids, and both straight and bent (135 degrees ) test samples were analyzed. The results showed that for straight (as-received) test samples, the rhombohedral phase (R-phase) was definitely present in one shape memory wire product and perhaps in the other shape memory wire product, but was apparently absent in the superelastic wire product that did not display shape memory. Martensite was observed in all three wire products after bending. Phase transformations occurred with temperature changes simulating the oral environment for straight test samples of the two shape memory wires, but the micro-XRD pattern changed minimally with temperature for straight test samples of the superelastic wire and for bent test samples of all three wire products. The phase transformations revealed by micro-XRD were consistent with results recently found by temperature-modulated differential scanning calorimetry.
journal_name
Biomaterialsjournal_title
Biomaterialsauthors
Iijima M,Brantley WA,Kawashima I,Ohno H,Guo W,Yonekura Y,Mizoguchi Idoi
10.1016/s0142-9612(03)00473-3keywords:
subject
Has Abstractpub_date
2004-01-01 00:00:00pages
171-6issue
1eissn
0142-9612issn
1878-5905pii
S0142961203004733journal_volume
25pub_type
杂志文章相关文献
BIOMATERIALS文献大全abstract::It is now well accepted that the initial rapid adsorption of blood proteins to biomaterial surfaces is important in the long-term performance of the implant. Cells that interact with the implant will be reacting to a layer (single or multiple) of adsorbed protein. The parameters of importance in a study of protein ads...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(97)00223-8
更新日期:1998-03-01 00:00:00
abstract::Titanium and its alloys are widely used in load-bearing implants as a result of their excellent mechanical properties and corrosion resistance. In order to improve their performances with respect to osseointegration, the use of bioactive coatings has been suggested. Polypyrrole (PPy) has been chosen as coating polymer...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(00)00449-x
更新日期:2001-10-01 00:00:00
abstract::The application of non-viral gene delivery vectors is often accompanied with the poor correlation between transfection efficiency and the safety profiles of vectors. Vectors with high transfection efficiencies often suffer from high toxicities, making it unlikely to improve their efficiencies by increasing the DNA dos...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2013.09.090
更新日期:2014-01-01 00:00:00
abstract::This experimental investigation aims at revealing the mechanical behaviour and failure pattern of direct fibre-reinforced resin-bonded dental bridge with various designs. To evaluate the overall effects of some newly developed dental materials, in the experiment, genuine composite dental bridge specimens are prepared ...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2004.01.010
更新日期:2004-09-01 00:00:00
abstract::Frequent outbreaks and the rapid global spread of infectious diseases have increased the urgent need for massive vaccination especially in countries with limited resources. Intranasal vaccination facilitates the mass vaccination via needle-free delivery of vaccine through nasal mucosal surfaces. Inspired by the strong...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2016.08.035
更新日期:2016-11-01 00:00:00
abstract::Lacking a blood supply and having a low cellular density, articular cartilage has a minimal ability for self-repair. Therefore, wide-ranging cartilage damage rarely resolves spontaneously. Cartilage damage is typically treated by chondrocyte transplantation, mosaicplasty or microfracture. Recent advances in tissue eng...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2012.01.056
更新日期:2012-05-01 00:00:00
abstract::We compared the osteogenic response in porous alumni (Al) and hydroxyapatite coated porous alumni ceramic (HA/Al) by grafting rat bone marrow cells with these implants subcutaneously in the back of syngeneic rats. The ceramics did not show any bone formation without marrow, but did when combined with marrow cells. The...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/0142-9612(96)89774-2
更新日期:1996-08-01 00:00:00
abstract::Immune response testing of biomaterials is an essential component of biocompatibility assessment, particularly when the materials of interest are used to design bioresorbable scaffolds with the potential to promote in situ regeneration. Current trends in immune response testing of biomaterials typically examine few el...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2008.09.019
更新日期:2009-01-01 00:00:00
abstract::An insulin delivery system that self-regulates blood glucose levels has the potential to limit hypoglycemic events and improve glycemic control. Glucose-responsive insulin delivery systems have been developed by coupling glucose oxidase with a stimuli-responsive biomaterial. However, the challenge of achieving desirab...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2020.120458
更新日期:2021-01-01 00:00:00
abstract::A quantitative comparison between nuclear DNA release from carriers and their transfection activity would be highly useful for improving the effectiveness of non-viral gene vectors. We previously reported that, for condensed DNA particles, a close relationship exists between the efficiency of DNA release and transfect...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2012.01.049
更新日期:2012-05-01 00:00:00
abstract::Materials for orthopaedic implants can fail for several combined reasons: corrosion, fatigue and wear for metals, wear and creep for polymers, fracture for ceramics. Some typical cases are analysed and it is demonstrated that ion implantation improves metals and polymers used for joint prosthesis. Implantations of nit...
journal_title:Biomaterials
pub_type: 杂志文章
doi:
更新日期:1990-07-01 00:00:00
abstract::Bioprosthetic heart valves fail as the result of two simultaneous processes: structural deterioration and calcification. Leaflet deterioration and perforation have been correlated with regions of highest stress in the tissue. The failures have long been assumed to be due to simple mechanical fatigue of the collagen fi...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(99)00013-7
更新日期:1999-06-01 00:00:00
abstract::MicroRNAs (miRNA, miR) have been reported as cancer biomarkers that regulate tumor suppressor genes. Hence, simultaneous detecting and inhibiting of miRNA function will be useful as a cancer theragnostics probe to minimize side effects and invasiveness. In this study, we developed a cancer-targeting therangostics prob...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2011.09.023
更新日期:2012-01-01 00:00:00
abstract::Airway tracts serve as a conduit of transport in the respiratory system. Architecturally, these are composed of cartilage rings that offer flexibility and prevent collapse during normal breathing. To this end, the successful regeneration of an airway tract requires the presence of differentiated chondrocytes and airwa...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2014.04.040
更新日期:2014-08-01 00:00:00
abstract::A pH-sensitive molecularly imprinted polymer (MIP) nanospheres/hydrogel composite exhibiting controlled release of dexamethasone-21 phosphate disodium (DXP) was developed as a potential coating for implantable biosensors to improve their biocompatibility. The molecularly imprinted pH-sensitive nanospheres were prepare...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2010.02.073
更新日期:2010-06-01 00:00:00
abstract::The surface of soft contact lenses made of crosslinked poly(2-hydroxyethyl methacrylate). pHEMA, has been investigated with atomic force microscopy in contact mode. The friction force and adhesive force measurements were able to differentiate the non-crosslinked pHEMA chains from the surface of the crosslinked pHEMA n...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(01)00175-2
更新日期:2001-12-01 00:00:00
abstract::Melanoma inhibitory activity (MIA), also referred to as cartilage derived retinoic acid-sensitive protein (CD-RAP), is detected physiologically in cartilage tissue and pathologically in malignant melanomas. To measure MIA/CD-RAP quantitatively we developed a sensitive ELISA system. Recently, we described diagnostic ap...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(03)00184-4
更新日期:2003-08-01 00:00:00
abstract::This study investigated the in vitro effects of akermanite, a new kind of Ca-, Mg-, Si-containing bioceramic, on the attachment, proliferation and osteogenic differentiation of human adipose-derived stem cells (hASCs). Parallel comparison of the cellular behaviors of hASCs on the akermanite was made with those on beta...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2008.08.039
更新日期:2008-12-01 00:00:00
abstract::Bone morphogenetic protein (BMP) 2-incorporated gelatin sponge is effective for in vivo osteoinduction. However, the modeling capacity of bone decreases with age. As atrial to stimulate effective bone formation for animals with decreased osteogenic potential, Wnt1 inducible signaling pathway protein (WISP) 1, an osteo...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2011.04.035
更新日期:2011-08-01 00:00:00
abstract::The formation of bone tissue in pores, and around, a block made of partially dehydroxylated porous hydroxyapatite ceramic and implanted into a rat's femur using X-ray diffraction (XRD), infrared spectroscopy (IRS) and histological methods were investigated. Structural characteristics and composition of new bone tissue...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(98)00024-6
更新日期:1998-07-01 00:00:00
abstract::A series of PLA/PEO/PLA triblock copolymers was prepared by ring opening polymerization of rac-lactide in the presence of various di-hydroxyl poly (ethylene glycol)s, using CaH2 as a biocompatible initiator. Hydrogels were prepared by a phase separation method consisting of introducing small amounts of water over solu...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(00)00192-7
更新日期:2001-02-01 00:00:00
abstract::Matrix anisotropy is important for long term in vivo functionality. However, it is not fully understood how to guide matrix anisotropy in vitro. Experiments suggest actin-mediated cell traction contributes. Although F-actin in 2D displays a stretch-avoidance response, 3D data are lacking. We questioned how cyclic stre...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2012.06.103
更新日期:2012-10-01 00:00:00
abstract::We synthesized arginine-conjugated polypropylenimine dendrimer G2 (DAB-8), PPI2-R for gene delivery systems. Synthesized PPI2-R could retard plasmid DNA at a weight ratio of 4 completely and PPI2-R polyplexes showed a fluorescence of less than 10% over a charge ratio of 2 by PicoGreen reagent assay, suggesting its goo...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2006.12.013
更新日期:2007-04-01 00:00:00
abstract::Implantation of skeletal myoblasts to the heart has been investigated as a means to regenerate and protect the myocardium from damage after myocardial infarction. While several animal studies utilizing skeletal myoblasts have reported positive findings, results from clinical studies have been mixed. In this study we u...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2010.09.061
更新日期:2011-01-01 00:00:00
abstract::The purpose of this study was to access tissue reactions to the outer prismatic (prism) and the inner nacreous (nacre) layers of the fresh water Margaritifera shell. The materials, in granule form, were implanted into the back muscles and femurs of rats for 1, 2, 4, 8 and 16 weeks. In the back muscles, a foreign body ...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(99)00184-2
更新日期:2000-03-01 00:00:00
abstract::Inflammatory bowel disease (IBD) is a chronic inflammatory gastrointestinal disorder that affects more than 1 million individuals in the USA. Local therapy with enema formulations, such as micronized budesonide (Entocort®), is a common strategy for treating patients with distally active IBD. However, we hypothesize th...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2018.09.005
更新日期:2018-12-01 00:00:00
abstract::CD47, a "don't eat me" signal, is over-expressed on the surface of most tumors that interacts with signal regulatory protein α (SIRPα) on phagocytic cells. By engaging SIRPα, CD47 limits the ability of macrophages to engulf tumor cells, which acts as a major phagocytic barrier. In this study, we developed an exosome-b...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2017.01.004
更新日期:2017-03-01 00:00:00
abstract::Titiania nanotubes have large potential in medical implant applications but their tissue compatibility is still controversial. Since the sterilization methods may impact the biocompatibility of titania nanotubes and be the source of the controversy, we investigate the influence of three commonly used sterilization met...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2009.11.103
更新日期:2010-03-01 00:00:00
abstract::By taking advantage of the excessively upregulated expression of neuropilin (NRP) on the surface of both glioma cells and endothelial cells of angiogenic blood vessels, the ligand of NRP with high affinity - tLyp-1 peptide, which also contains a CendR motif ((R/K)XX(R/K)), was functionalized to the surface of PEG-PLA ...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2013.04.025
更新日期:2013-07-01 00:00:00
abstract::Myotube formation is crucial to restoring muscular functions, and biomaterials that enhance the myoblast differentiation into myotubes are highly desirable for muscular repair. Here, we report the synthesis of electroactive, ductile, and degradable copolymers and their application in enhancing the differentiation of m...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2015.08.042
更新日期:2015-12-01 00:00:00