• Guerrero-Beltrán, C.E. Hydroxyapatite Nanoparticles in Drug Delivery. (encyclopedia.pub)
  • Hydroxyapatite Nanoparticles in Drug Delivery" Encyclopedia , https://encyclopedia.pub/entry/15487 (accessed December 05, 2023). (encyclopedia.pub)
  • In this sense, biomaterials can be categorized into polymers, liposomes, micelles, dendrimers, and calcium phosphate (CaP) nanoparticles, where each will show a different type of bioactivity. (encyclopedia.pub)
  • Calcium phosphate nanoparticles were produced in a range of calcium-to-phosphorus ratio, (1.20-2.19) in order to analyze the morphology and crystallinity changes, and to test the bioactivity of particles. (metu.edu.tr)
  • The findings suggest that calcium phosphate nanoparticles produced in this work have a potential to be used as biomaterials in biomedical applications. (metu.edu.tr)
  • This study was aimed at fabrication and characterization of conjugated gold-cockleshell-derived calcium carbonate nanoparticles (Au-CSCaCO3NPs) for biomedical application. (documents.pub)
  • Journal of Biomaterials Science-Polymer Edition, 26 (16). (csircentral.net)
  • For this reason, in the recent five years hydroxyapatite particles and whiskers have been added as novel bioactive and biocompatible reinforcing filler in dental restorations. (hindawi.com)
  • Bioactive Synthetic Polymer-Based Polyelectrolyte LbL Coating Assembly on Surface Treated AZ31-Mg Alloys. (pitt.edu)
  • First, phase pure hydroxyapatite-chitosan nanocrystals were in situ synthesized by coprecipitation method using a solution of 2% acetic acid dissolved chitosan and aqueous solution of calcium nitrate tetrahydrate Ca(NO3)(2),4H(2)O] and diammonium hydrogen phosphate (NH4)(2)H PO4]. (csircentral.net)
  • In the present study, the calcium phosphate powders (HAP, HAP-TCP) were produced by a precipitation technique involving the use of aqueous solutions of calcium nitrate and diammonium hydrogen phosphate. (metu.edu.tr)
  • Scaffolds with varying composition of hydroxyapatite, chitosan, and gelatin were prepared using lyophilization technique where glutaraldehyde (GTA) acted as a cross-linking agent for biopolymers. (csircentral.net)
  • Biodegradable polymers have been widely used and accepted as the most suitable materials for scaffolds due to their degradability, biocompatibility, and ease of processability [ 9 - 11 ]. (hindawi.com)
  • antimicrobial activity and improvement of the mechanical properties of polymers, being classified as excellent candidates for the manufacture of bone fixation devices, molecular scaffolds, orthopedic implants, or dental materials. (graphenemex.com)
  • Polymers have been widely chosen as tissue scaffolding material having a good combination of biodegradability, biocompatibility, and porous structure. (hindawi.com)
  • Zhang and Ma have developed [ 25 ] a highly porous biodegradable polymer/apatite composite scaffold (95% porosity) through a thermally induced phase separation technique, which resulted in significant improvement in mechanical properties compared to polymer-only scaffold. (hindawi.com)
  • Barnes DH, Jugdaosingh R, Kiamil S, Best SM (2 011) Shelf Life and Chemical Stability of Calcium Phosphate Coatings Applied to Poly Carbonate Urethane Substrates. (omicsonline.org)
  • Despite numerous studies on the dissolution properties of calcium phosphate (CaP) coatings, the coating "shelf life" (i.e. the chemical stability of these coatings prior to implantation), has not been investigated adequately, particularly for CaP coatings applied to polymeric substrates. (omicsonline.org)
  • This paper examines the chemical stability of CaP coatings that were applied to a poly carbonate urethane (PCU) substrate by an aqueous, low temperature technique. (omicsonline.org)
  • Calcium phosphate (CaP) coatings are applied to the surface of a range of orthopaedic implants to enhance the interfacial bonding between the implant and host tissue. (omicsonline.org)
  • Hydroxyapatite and other calcium phosphate coatings have been investigated extensively for clinical applications due to their ability to form a direct bond with living bone, a property often referred to as "bioactivity" [ 2 ]. (omicsonline.org)
  • Numerous prior studies have investigated the dissolution of CaP coatings, such as hydroxyapatite, in conditions designed to simulate physiological conditions, i.e. typically at pH 7.4 and at ~37 °C [ 3 - 7 ]. (omicsonline.org)
  • This paper discusses the processes of grit-blasting, plasma spraying, acid-etching, anodization and implant surface coatings with hydroxyapatite. (com.pk)
  • Ahmed F, Rashid H, Farookhi S, Verma V, Mulyar Y, Khalifa M, Sheikh Z. Surface modifications of endosseous dental implants by incorporation of roughness and hydroxyapatite coatings. (com.pk)
  • Effects of strontium-substitution in sputter deposited calcium phosphate coatings on the rate of corrosion of magnesium alloys. (pitt.edu)
  • A systematic evaluation of mechanical and biocompatibility properties of different volume fractions of hydroxyapatite whiskers in comparison with three commercial dental composites filled with micro- and nanosilica particles was carried out. (hindawi.com)
  • Six groups with different hydroxyapatite whiskers mass fractions were taken into account in order to be compared with the performances of silica particles based composites group. (hindawi.com)
  • With this aim, different mass fraction of hydroxyapatite based composites and three commercial composites loaded with silica particles were tested and compared in order to verify the effective enhancement in both biocompatibility and mechanical properties. (hindawi.com)
  • Beside copolymerization, polymer composites have been explored in order to improve mechanical property and biocompatibility. (hindawi.com)
  • Hydroxyapatite-PMMA composites. (dokumen.pub)
  • Hydroxyapatite-PS composites. (dokumen.pub)
  • Metals that can degrade in physiological environment, namely, biodegradable metals, are proposed as potential materials for hard tissue scaffolding where biodegradable polymers are often considered as having poor mechanical properties. (hindawi.com)
  • Synthetic biodegradable polymers such as poly(lactic acid) (PLA), poly(glycolic acid) (PGA), and their copolymers have been used in many clinical applications [ 12 - 16 ]. (hindawi.com)
  • Biodegradable polymers degrade through hydrolysis process and are gradually absorbed by the human body thus allowing the supported tissue to gradually recover its functionality [ 8 , 17 ]. (hindawi.com)
  • Synthetic biodegradable polymers. (dokumen.pub)
  • The characterization results confirmed that nanometer-sized, spherical calcium phosphate particles were produced. (metu.edu.tr)
  • The present study evaluates the synthesis of biocompatible osteoconductive and osteoinductive nano calcium phosphate (CaP) particles by industrially applied, aerosol-derived flame spray pyrolysis method for biomedical field. (metu.edu.tr)
  • Calcium sulfate is highly biocompatible and, since it is entirely replaced by bone, is biodegradable, having the ability to promote bone formation. (bauersmiles.com)
  • Many modern orthopaedic implants are coated with calcium phosphate to improve the host tissue response to the implants. (omicsonline.org)
  • Hydroxyapatite, a type of calcium phosphate that is similar to the mineral component of bone, is the most commercially popular calcium phosphate coating for biomedical implants [ 1 ]. (omicsonline.org)
  • 11 Calcium phosphate-coated implants have been described in the literature which demonstrate early direct bone attachment to the hydroxyapatite surface and this occursas quickly as one month post-operatively. (com.pk)
  • In this study, the kinetics and mechanisms of converting three groups of sodium-calcium-borate glasses with varying CaO:B2O3 ratio to hydroxyapatite (HA) in 0.25 M K2HPO4 solution were investigated at 10-70 °C. Glass disks with the composition 2Na2O·(2 − x)CaO·(6 + x)B2O3 (x = 0, 0.5, and 1.0) were immersed for up to 8 days in the potassium phosphate solution. (mst.edu)
  • Why ( and how ) did researchers of the previous century use blood plasma-like synthetic biomineralization solutions , instead of distilled or deionized water, to synthesize biomimetic calcium phosphates? (cuneyttas.com)
  • Data obtained show better interfacial interaction with filler/matrix until 20 wt% of hydroxyapatite whiskers partially replaced silica particles filler. (hindawi.com)
  • This information is of primary interest in order to achieve a final consistency and specific formulation of hydroxyapatite whiskers mixed with silica particles filler in resin composite. (hindawi.com)
  • In particular, six different ratios of hydroxyapatite/silica particles were investigated. (hindawi.com)
  • XRD patterns, HRTEM, SAED, and SEM analyses revealed the amorphous nature of the asprepared nano calcium phosphate particles at low Ca/P ratios. (metu.edu.tr)
  • 14] Yea X., Liua T., Li Q., Liua H., Wu Z., Comparison of Strontium and Calcium Adsorption Onto Composite Magnetic Particles Derived from Fe 3 O 4 and Bis(trimethoxysilylpropyl) amine , Colloids Surf . (nsmsi.ir)
  • Biodegradability can be imparted into polymers through molecular design with a controlled rate in concert with tissue regeneration [ 18 - 21 ]. (hindawi.com)
  • One of the potential limitations associated with the use of alginate for in vivo tissue regeneration is that it is in general non-degradable by mammals, as they lack the enzymes needed to break down the polymer chains 21 . (nature.com)
  • 6. Jarcho M: Calcium phosphate ceramics as hard tissue prosthetics. (ijcrr.com)
  • In addition, hydroxyapatite whiskers (wHA) have been considered the best option as reinforcing filler in comparison with other whiskers based on carbon, ceramic, glass, metal, and polymer due to the absence of cytotoxicity effects [ 12 , 13 ]. (hindawi.com)
  • 10 https://en.wikipedia.org/wiki/Ceramic (accessed in March 2018). (ceramic-science.com)
  • In fact, it was shown that the incorporation of hydroxyapatite with whiskers morphology can provide larger load transfer and favor toughening mechanisms, thus, increasing flexural modulus and fracture toughness of resins in comparison with conventional silica based fillers [ 6 - 11 ]. (hindawi.com)
  • 6] Park J., Photocatalytic Activity of Hydroxyapatite-Precipitated Potassium Titanate Whiskers , J. Alloys Compd . (nsmsi.ir)
  • Hydroxyapatite-chitosan/gelatin (HA:Chi:Gel) nanocomposite scaffold has potential to serve as a template matrix to regenerate extra cellular matrix of human bone. (csircentral.net)
  • In this process sodium-DL-(α,β)-poly(aspartate) with 30% α-linkages and 70% β-linkages randomly distributed along the polymer chain, and racemized chiral center of aspartic acid is produced. (wikipedia.org)
  • Hydroxyapatite-collagen nanocomposites. (dokumen.pub)
  • Generation of an Adequate Perfusion Network within Dense Collagen Hydrogels Using Thermoplastic Polymers as Sacrificial Matrix to Promote Cell Viability. (upmc.fr)
  • In addition, the ionization of acidic monomers allows calcium ion chelation and collagen fiber hybridization, which are important adhesion mechanisms in dental bonding [3]. (sagepub.com)
  • Synthesis of Hybrid Polyphenol/Hydroxyapatite Nanomaterials with Anti-Radical Properties. (upmc.fr)
  • The biopolymer product grows into the void space of the tool, filling the space with an undifferentiated mycelium chitin-polymer, which is subsequently extracted from the substrate and dried. (justia.com)
  • Thus, a more durable, less soluble, and more translucent material was developed 33 , with chemical bonding to the dental substrate by the bonding of calcium ions to carboxylic radicals existing in the enamel, dentin and cementum. (bvsalud.org)
  • In addition, biocompatibility test showed less cytotoxic effect with the addition of 20 wt% of hydroxyapatite in comparison with higher rates. (hindawi.com)
  • To overcome the present lack in the literature about hydroxyapatite based composite, we proposed a systematic analysis of the mechanical and biocompatibility performances of them in comparison with commercial dental composite. (hindawi.com)
  • Moreover, hydrophilic monomers commonly present in self-etch formulations such as the 2-hydroxyl methacrylate (HEMA) and the 10-methacryloyloxydecyl dihydrogen phosphate (MDP) may experience hydrolysis prior to their clinical application when still inside the adhesive vial. (sagepub.com)
  • Hydroxyapatite (HAP) has been the gold standard in the biomedical field due to its composition and similarity to human bone. (encyclopedia.pub)
  • In a subsequent step the resulting polysuccinimide is treated with aqueous sodium hydroxide, which yields partial opening of the succinimide rings. (wikipedia.org)
  • The resulting polymer reacts with aqueous sodium hydroxide, which hydrolyzes one of the two amide bonds of the succinimide ring to form a sodium carboxylate. (wikipedia.org)
  • The chemical, physical and microscopic properties of the modified polymers were comprehensively studied, and their active site density was quantified by fluorescein sodium salt-cetyltrimethylammonium chloride reaction. (bvsalud.org)
  • The main component of bone is hydroxyapatite (ca. 70%) (mineralized calcium phosphate). (wikipedia.org)
  • TEOS xerogel was investigated as adsorbent to removal strontium ion from aqueous solution in batch operations. (nsmsi.ir)
  • ICP-OES was used to measure the calcium and phosphorus concentrations of the immersion solution. (omicsonline.org)
  • Polymer solution parameters. (dokumen.pub)
  • Calcium sulfate hemihydrate transforms into dihydrate when it encounters water or aqueous solution, forming a solid mass in a process called setting. (bauersmiles.com)
  • Its high affinity with calcium has been exploited for targeting various forms of drug-containing carriers to the bone. (wikipedia.org)
  • Calcium sulfate is the graft material with the longest proven history in bone augmentation procedures. (bauersmiles.com)
  • Calcium sulfate is available in three different phases: i.e. hemihydrate (CaSO4 * 1/2H2O), dihydrate (CaSO 4 ·2H 2 O), and anhydride (CaSO 4 ). (bauersmiles.com)
  • This transformation is reversible, with gypsum or calcium sulfate hemihydrate forming anhydrite by heating to ~200°C under normal atmospheric conditions.The hemihydrate phase has two different forms, alpha and beta, that differ by their crystalline structure and their hardness. (bauersmiles.com)
  • In order to overcome the disadvantages of the dihydrate form of calcium sulfate, companies offer calcium sulfate in a post-setting form, i.e., dihydrate. (bauersmiles.com)
  • The idea behind the development of biphasic calcium sulfate was to avoid adding any additives, polymers, or accelerators in order not to change or interfere with the purity of the material and its efficient and known clinical characteristics. (bauersmiles.com)
  • BondBone® is a pure calcium sulfate composed of the two phases, hemihydrate and dehydrate, in a granulated powder form. (bauersmiles.com)
  • How to synthesize calcium phosphates in biomimetic saline solutions, over the pH range of 9 to 12.5 , without adding any strong base such as NH 4 OH, NaOH or KOH? (cuneyttas.com)
  • In the first approach, polymer surfaces were activated by O2-free air-ozonolysis, and then the active agent (trimethoxysilyl) propyl-octadecyl-dimethyl-ammonium chloride (C18-TSA) was covalently bound. (bvsalud.org)
  • At present the most frequent choice of ionic crosslinker is Calcium Chloride (CaCl 2 ) as it typically leads to rapid gelation due to its high solubility in aqueous solutions 21 . (nature.com)
  • As the main biomineral component in enamel and dentine, hydroxyapatite is responsible for their higher mechanical performances. (hindawi.com)
  • Hybrid anion exchange resin containing hydrous ferric oxide (HAIX-Fe) was used in column tests to remove phosphate (PO 4 ) from fresh urine, hydrolyzed urine, and anaerobic digester filtrate, and subsequently recover PO 4 as struvite (MgNH 4 PO 4 ·6H 2 O) or potassium struvite (MgKPO 4 ·6H 2 O) via precipitation in the spent regenerant. (rsc.org)
  • Nanocrystalline and nanostructured TiO2-Cr2O3 thin films and powders were prepared by a facile and straightforward aqueous particulate sol-gel route at low temperature of 400°C. The prepared sols showed a narrow particle size distribution with hydrodynamic diameter in the range of 17.7 nm to 19.0 nm. (sharif.edu)
  • Polyaspartic acid (PASA) is a biodegradable, water-soluble condensation polymer based on the amino acid aspartic acid. (wikipedia.org)