• Each technique yields hydroxyapatite crystals of varied characteristics, such as size and shape. (wikipedia.org)
  • The mineral ions introduced during remineralisation restore the structure of the hydroxyapatite crystals. (wikipedia.org)
  • If fluoride ions are present during the remineralisation, through water fluoridation or the use of fluoride-containing toothpaste, the stronger and more acid-resistant fluorapatite crystals are formed instead of the hydroxyapatite crystals. (wikipedia.org)
  • Reinforcing of a calcium phosphate cement with hydroxyapatite crystals of various morphologies. (mpg.de)
  • Cats mostly have Struvite (most common) or Calcium Oxalate crystals but urethral plugs are usually struvite in origin and mixed with cellular debris. (naturalhealthtechniques.com)
  • Rabbits are prone to calcium oxalate crystals. (naturalhealthtechniques.com)
  • It can inhibit the formation, growth, and dissolution of hydroxyapatite crystals and their amorphous precursors by chemisorption to calcium phosphate surfaces. (nih.gov)
  • Etidronate disodium chemisorbs to calcium hydroxyapatite crystals and their amorphous precursors, blocking the aggregation, growth, and mineralization of these crystals. (nih.gov)
  • Taking the inspiration from the biomineral, the wool keratin was selected to modulate the assembly of nanosized hydroxyapatite (HA) crystals via a coprecipitation method. (manchester.ac.uk)
  • The crystals, called hydroxyapatite, bond when proteins and minerals interact. (sciencedaily.com)
  • Novel cellulose based-scaffolds were studied for their ability to nucleate bioactive calcium phosphate crystals for future bone healing applications. (chalmers.se)
  • Scaffolds that were treated with CaCl2, a mixture of carboxymethyl cellulose (CMC) and CaCl2 and NaOH and CaCl2, were analyzed using X-ray photoelectron spectroscopy, X-ray powder diffraction, and scanning electron microscopy to understand the growth of bioactive calcium phosphate (Ca-P) crystals as a function of surface treatment. (chalmers.se)
  • The crystal structure of the nucleated Ca-P crystals had a diffraction pattern similar to that of hydroxyapatite, the mineralized component of bone. (chalmers.se)
  • Because these ultramicroscopic crystals are nonacidic calcium phosphates, the term basic calcium phosphate (BCP) is much more precise than apatite . (msdmanuals.com)
  • Clumped crystals can usually be identified only with special calcium stains or transmission electron microscopy. (msdmanuals.com)
  • Self-assembly of amorphous calcium carbonate microlens arrays. (mpg.de)
  • Chemical systems of study include zinc oxide and the biominerals calcium carbonate (calcite) and calcium hydroxyl phosphate (hydroxyapatite). (winthrop.edu)
  • The cement powder includes one or more calcium phosphate compounds and one or more carbonate compounds. (nist.gov)
  • Then, using FTIR spectra and the map, the collagen content and ratios corresponding to matrix maturity, mineralization, carbonate substitution, acid phosphate substitution, and crystallinity were calculated. (hindawi.com)
  • The biochemical analysis showed that the bone with an SF presented a bone immaturity characterized by a higher content of collagen, lower matrix maturity, mineralization, carbonate and acid phosphate substitutions, and greater crystallinity compared to the healthy bone, being checked by the ratio analysis and biochemical mapping. (hindawi.com)
  • As a composite material mostly made out of hard calcium carbonate . (kids.net.au)
  • Bones consist of living animal cells embedded in a calcium carbonate matrix that makes up the main bone material. (kids.net.au)
  • For example, the presence of calcium during struvite precipitation can decrease mineral purity by co-precipitating calcium carbonate and calcium phosphate minerals with struvite. (rsc.org)
  • Most pathologic calcifications throughout the body contain mixtures of carbonate-substituted hydroxyapatite and octacalcium phosphate. (msdmanuals.com)
  • During demineralisation, calcium and phosphorus ions are drawn out from the hydroxyapatite. (wikipedia.org)
  • A periodic layer underneath the impact layer composed of hydroxyapatite with lower calcium and phosphorus content (thus resulting in a much lower modulus) inhibits crack growth by forcing new cracks to change directions. (wikipedia.org)
  • Phosphate is often referred as "phosphorus," a practice that is inaccurate and misleading. (medscape.com)
  • The primary cause of urinary calculi is feeding concentrate diets which are excessive in phosphorus and magnesium and/or have an imbalance of calcium and phosphorus. (naturalhealthtechniques.com)
  • It can be prevented by feeding rations which contain a calcium-to-phosphorus ratio of at least 2:1. (naturalhealthtechniques.com)
  • High calcium diets are effective at reducing the absorption of phosphorus from the gastrointestinal tract. (naturalhealthtechniques.com)
  • Recovery of phosphorus (P) from various types of wastewater has been proposed as a more sustainable alternative to phosphate rock mining due to concerns about the finite supply of phosphate rock, economic scarcity of phosphate, and the critical need for P in agriculture and food production. (rsc.org)
  • Hydroxyapatite (IMA name: hydroxylapatite) (Hap, HAp, or HA) is a naturally occurring mineral form of calcium apatite with the formula Ca5(PO4)3(OH), often written Ca10(PO4)6(OH)2 to denote that the crystal unit cell comprises two entities. (wikipedia.org)
  • Hydroxyapatite (HAp) is a particular kind of calcium phosphate, which belongs to the apatite group of minerals. (lamberti.com)
  • Basic calcium phosphate (apatite) and calcium oxalate crystal disorders tend to cause clinical manifestations similar to those of other crystal-induced arthritides. (msdmanuals.com)
  • The calcific deposit consists of amorphous calcium phosphate and poorly crystallized hydroxyapatite. (medscape.com)
  • One approach is to remineralize the lesion body with fluoride, casein phosphopeptide amorphous calcium phosphate (CPP-ACP) or nano-hydroxyapatite (nHAP). (nature.com)
  • The most common assay for phosphate determination in clinical laboratories is based on a spectrophotometric method of complexing the serum inorganic phosphate with ammonium molibdate at low pH and formation of an absorbent phosphomolibdate complex that is measured by the spectrophotometer instrument. (medscape.com)
  • Glass fibers wrapped with ultralong hydroxyapatite nanowires were woven into an inorganic, fire-resistant paper. (acs.org)
  • The inorganic is mainly crystalline mineral salts and calcium, which is present in the form of hydroxylapatite. (kids.net.au)
  • More than 99% of calcium in the body is in the form of calcium hydroxyapatite, an inorganic matrix of calcium and phosphate that is stored in the bones and teeth [ 1 , 4 , 5 ]. (nih.gov)
  • Hydroxyapatite can be synthesized via several methods, such as wet chemical deposition, biomimetic deposition, sol-gel route (wet-chemical precipitation) or electrodeposition. (wikipedia.org)
  • This cleaves phosphate groups and acts as the foci for calcium and phosphate deposition. (kids.net.au)
  • Unlike teeth, bone undergoes continuous remodeling, with constant resorption and deposition of calcium into new bone [ 4 ]. (nih.gov)
  • A potential explanation of the association between elevated serum phosphate levels and calcified AS may be hydroxyapatite deposition, which can induce the formation of osteoblast-like interstitial stromal cells and smooth muscle cells. (medscape.com)
  • As of 2019[update], the use of hydroxyapatite, or its synthetically manufactured form, nano-hydroxyapatite, is not yet common practice. (wikipedia.org)
  • The aim of the study was to assess the efficacy of three methods of enamel remineralization on initial approximal caries: (1) a nano-hydroxyapatite gel, (2) gaseous ozone therapy, (3) combination of a nano-hydroxyapatite gel and ozone. (nature.com)
  • Patients (n = 92, age 20-30 years) with initial approximal enamel lesions on premolar and molar teeth (n = 546) were randomly allocated to three groups subjected to a 6-months treatment: Group I: domestic nano-hydroxyapatite remineralizing gel, group II: in-office ozone therapy, group III: both domestic remineralizing gel and ozone therapy. (nature.com)
  • Thus nano-hydroxyapatite gel and ozone therapy exert some capacities to remineralize approximal enamel and dentine subsurface lesions of premolar and molar teeth. (nature.com)
  • Moreover, the combination of both methods produces the best effect compared to nano-hydroxyapatite or ozone therapy applied alone. (nature.com)
  • Up to 50% by volume and 70% by weight of human bone is a modified form of hydroxyapatite, known as bone mineral. (wikipedia.org)
  • Carbonated calcium-deficient hydroxyapatite is the main mineral of which dental enamel and dentin are composed. (wikipedia.org)
  • Hydroxyapatite is the main mineral component of enamel in teeth. (wikipedia.org)
  • Hydroxyapatite is a mineral that occurs in bones and teeth. (medicalnewstoday.com)
  • OBJECTIVES: This study investigated the indirect effect of calcium-enriched mixture (CEM) cement and mineral trioxide aggregate (MTA), as 2 calcium silicate-based hydraulic cements, on human dental pulp stem cells (hDPSCs). (koreamed.org)
  • Dr. Tay will use calcium phosphate, a mineral that's the primary component of dentin, enamel and bone, and two protein analogs also found in dentin so he can mimic nature while controlling the size of each crystal. (sciencedaily.com)
  • Also, significant discoveries including new embryological molecular genetic transcription factors, the role of active placental mineral transport, and hormone regulation factors have changed the understanding of calcium and phosphate homeostasis in the fetus and the newborn. (frontiersin.org)
  • 6 Thus, P recovery from the most concentrated waste streams that comprise domestic wastewater, such as human urine and anaerobic digester sidestreams, 7,8 would provide an alternative to phosphate rock fertilizers while having the important benefits of decreasing nutrient loading to receiving waters and reducing operational problems caused by mineral scaling at wastewater treatment plants. (rsc.org)
  • Calcium, the most abundant mineral in the body, is found in some foods, added to others, present in some medicines (such as antacids), and available as a dietary supplement. (nih.gov)
  • Dual x-ray absorptiometry testing of bone mineral density can be used to assess cumulative calcium status over the lifetime because the skeleton stores almost all calcium in the body [ 3 ]. (nih.gov)
  • Their dactyl appendages have excellent impact resistance due to the impact region being composed of mainly crystalline hydroxyapatite, which offers significant hardness. (wikipedia.org)
  • Hydroxyapatite (HAP, Ca 10 (PO 4 ) 6 (OH) 2 ) has a hexagonal prismatic structure that exposes two crystalline surfaces: prism-faceted a- and basal-faceted c-surfaces. (osti.gov)
  • article{osti_1543698, title = {Effects of Controlled Crystalline Surface of Hydroxyapatite on Methane Oxidation Reactions}, author = {Oh, Su Cheun and Xu, Jiayi and Tran, Dat T. and Liu, Bin and Liu, Dongxia}, abstractNote = {Hydroxyapatite (HAP, Ca10(PO4)6(OH)2) has a hexagonal prismatic structure that exposes two crystalline surfaces: prism-faceted a- and basal-faceted c-surfaces. (osti.gov)
  • Calcium hydroxyapatite is made up of ions of calcium and phosphate, which occur naturally in the human body. (gravitymedspa.com)
  • Kalident is a HAp-based formulation that, providing topical sources of Calcium and Phosphate ions, is able to strongly enhance the natural remineralization process induced by saliva. (lamberti.com)
  • Furthermore, estimated glomerular filtration rate did not influence the associations of serum levels of phosphate and calcium-phosphate product with incidental AS. (medscape.com)
  • The rather non-inventive names of these minerals are Fluorapatite, Chlorapatite and Hydroxylapatite. (galleries.com)
  • The bone minerals calcium, phosphate and magnesium are all maintained at higher concentrations in utero to achieve adequate bone accretion. (frontiersin.org)
  • Passive and active transport of bone-minerals occurs across the placenta to achieve higher fetal concentration of calcium, phosphate, and magnesium compared to maternal levels. (frontiersin.org)
  • Bone remodeling is required to change bone size during growth, repair damage, maintain serum calcium levels, and provide a source of other minerals [ 4 ]. (nih.gov)
  • As time goes on, the calcium hydroxyapatite stimulates your naturally-occurring collagen, which essentially allows your skin to create its own filler. (gravitymedspa.com)
  • The disease occurs when calculi (stones), usually comprised of phosphate salts, lodge in the urinary tract and prevent urination. (naturalhealthtechniques.com)
  • STATH is a salivary protein that stabilizes saliva supersaturated with calcium salts by inhibiting the precipitation of calcium phosphate salts. (thermofisher.com)
  • We attribute the coprolites to carnivorous dinosaurs based partly on their morphology together with the presence of bone fragments, and a high content of calcium phosphate (hydroxylapatite) with calcite. (lu.se)
  • This is rarely a pure stone and is often found combined with calcium oxalate and struvite. (naturalhealthtechniques.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)
  • Toothpaste formulations can also contain calcium phosphates, which are similar to tooth enamel, for remineralization. (chemistryviews.org)
  • Due to the presence of histatins (proline-rich proteins including cystatins and statherin), calcium and phosphate are maintained in supersaturation and are available for remineralization of tooth structure. (dentistrytoday.com)
  • Hydroxylapatite deposits in tendons around joints results in the medical condition calcific tendinitis. (wikipedia.org)
  • Based on their findings, the authors believe that phosphate regulators may have a key role in calcific valve prevention. (medscape.com)
  • The hydroxyapatite nanocrystal suspension can be prepared by a wet chemical precipitation reaction following the reaction equation below: 10 Ca(OH)2 + 6 H3PO4 → Ca10(PO4)6(OH)2 + 18 H2O The ability to synthetically replicate hydroxyapatite has invaluable clinical implications, especially in dentistry. (wikipedia.org)
  • Radiesse is a gel that contains microspheres of calcium hydroxyapatite. (gravitymedspa.com)
  • In vitro bioactivity of bioresorbable porous polymeric scaffolds incorporating hydroxyapatite microspheres. (mpg.de)
  • A dosimeter for EPR dosimetry systems includes a carbonated hydroxyapatite cement formed by mixing a cement powder and a cement liquid in a ratio of a range of about 0.5 to 5.0 powder-to-liquid ratio. (nist.gov)
  • The cement liquid includes a sodium phosphate solution. (nist.gov)
  • It consists of calcium phosphate, which is what makes bones and teeth hard. (medicalnewstoday.com)
  • Although hydroxyapatite-a form of calcium phosphate found in teeth and bone-is typically brittle, it becomes flexible when fashioned into ultralong nanowires. (acs.org)
  • Calcium makes up much of the structure of bones and teeth and allows normal bodily movement by keeping tissue rigid, strong, and flexible [ 1 ]. (nih.gov)
  • 2. The regulation of sodium/phosphate cotransporter activity in the renal tubules is the primary mechanism by which phosphate homeostasis is maintained. (frontiersin.org)
  • Prolonged storage at RT and delay testing/separation lead to hydrolysis of phosphate esters (eg, glucose phosphate, creatinine phosphate) and overestimation of phosphate concentration. (medscape.com)
  • Kidney stones (uroliths) made of calcium oxalate can cause renal disease in chinchillas. (naturalhealthtechniques.com)
  • Major phosphaturic hormones that regulate renal phosphate handling are PTH and FGF23. (frontiersin.org)
  • [ 5 , 6 ] However, lowered serum phosphate levels correlated with an equal degree of renal tubular reduction of tubular time of maximal concentration (T max ) of phosphate in both sexes, pointing to an additional factor in the creation of the bone disease in affected males. (medscape.com)
  • Three-dimensional tissue growth in polymer scaffolds with different stiffness and in-vitro influence of BMP-2 on tissue formation in hydroxyapatite scaffolds. (mpg.de)
  • The incorporation of poly(DL-lactic-co-glycolic acid) (PLGA) particles into calcium phosphate cements (CPCs) is an effective strategy to enhance CPC macroporosity and degradation. (upc.edu)
  • Bone and enamel start with the same calcium-phosphate crystal building material but end up quite different in structure and physical properties. (news-medical.net)
  • Of all the calcium phosphates in dental care products, hydroxyapatite (HAP, Ca 5 (PO 4 ) 3 OH) shows the closest chemical match to human tooth enamel crystallites and is, therefore, biocompatible. (chemistryviews.org)
  • The non-stoichiometric phases have the hydroxyapatite structure with cation vacancies (Ca2+) and anion (OH−) vacancies. (wikipedia.org)
  • Almost all (98%) calcium in the body is stored in the bones, and the body uses the bones as a reservoir for, and source of, calcium to maintain calcium homeostasis [ 1 ]. (nih.gov)
  • Calcium-deficient (non-stochiometric) hydroxyapatite, Ca10−x(PO4)6−x(HPO4)x(OH)2−x (where x is between 0 and 1) has a Ca/P ratio between 1.67 and 1.5. (wikipedia.org)
  • The Ca/P ratio is often used in the discussion of calcium phosphate phases. (wikipedia.org)
  • I want to get the latest chemistry news from C&EN in my inbox every week. (acs.org)
  • Calcium hydroxyapatite gives Radiesse a thicker, firmer consistency than hyaluronic acid dermal fillers. (gravitymedspa.com)
  • Phosphate concentration is characterized by a high physiologic variation, depending on age, gender, physiologic state (eg, pregnancy), and even season (due to the seasonal variation of vitamin D, which is directly involved in the regulation of phosphate concentration). (medscape.com)
  • Phosphate concentration in plasma and serum will increased in unseparated specimens stored at room temperature for longer time. (medscape.com)
  • As phosphates concentration is higher inside RBC, hemolysis will lead to increase in phosphates plasma/serum concentration. (medscape.com)
  • Phosphate concentration increases by 4-5 mg/dl per day in hemolyzed samples stored at 4°C or RT. (medscape.com)
  • Study of these refractory cases revealed low serum phosphate concentration as a common factor. (medscape.com)
  • The state of preservation of the spores and pollen is also more detailed in the coprolites, suggesting that encasement in calcium phosphate may inhibit degradation of sporopollenin. (lu.se)
  • Their functions include to varying degrees: formation of bone, matrix maintenance and calcium homeostasis. (kids.net.au)
  • Spire Corporation has announced that it has been awarded an SBIR Phase I grant for $156,878 from the National Institute of Dental and Craniofacial Research, National Institutes of Health (NIH), to develop nanophase calcium phosphate coatings loaded with bone morphogenic proteins (BMPs). (news-medical.net)
  • Bone ash is primarily tri-calcium phosphate or a form of calcium hydroxyapatite. (naturalpigments.com)
  • Levels of ionized (or free) calcium, the biologically active form, in serum are also used to measure calcium status. (nih.gov)
  • Hypophosphatemic rickets is a form of rickets that is characterized by low serum phosphate levels and resistance to treatment with ultraviolet radiation or vitamin D ingestion. (medscape.com)
  • Calcium in the urine is dependent on vitamin D absorption. (naturalhealthtechniques.com)
  • Vitamin D is required for calcium to be absorbed in the gut by active transport and to maintain adequate calcium levels in blood [ 1 ]. (nih.gov)
  • A new study suggests that increased levels of serum phosphate, but not calcium or vitamin D, could be a significant risk factor for incident aortic stenosis (AS). (medscape.com)
  • Phosphate, calcium, and vitamin D levels were determined from serum samples taken at baseline. (medscape.com)
  • Xia C, Lei W, Hu Y, Yang H, Zeng X, Chen M. Association of serum levels of calcium phosphate and vitamin D with risk of developing aortic stenosis: the UK Biobank cohort. (medscape.com)
  • These variations have a marked effect on the biological and mechanical properties of the compound, and therefore these hydroxyapatite products have different clinical uses. (wikipedia.org)
  • By playing with composition, size and shape, surface and multi-functionality modification, a wide range of hydroxyapatite-based application properties can be achieved. (lamberti.com)
  • He did his PhD studies on the influence of calcium intake on the skeletal development in young dogs, becoming a specialist in companion animal surgery (RNVA), Diplomate of the European College of Veterinary Surgeons, and Diplomate of the European College of Veterinary and Comparative Nutrition. (ivis.org)
  • An inverse relationship exists between calcium intake and absorption. (nih.gov)
  • Intake recommendations for calcium and other nutrients are provided in the Dietary Reference Intakes (DRIs) developed by the Food and Nutrition Board (FNB) at the National Academies of Sciences, Engineering, and Medicine [ 1 ]. (nih.gov)