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The Calcium Phosphate Matrix of FGF-2-Apatite

2014-6-10  The purpose of the present study was to fabricate fibroblast growth factor (FGF)-2-apatite composite layers on titanium (Ti) pins in one step at 25 °C using a supersaturated calcium phosphate (CaP) solution, and to evaluate the physicochemical characteristics and biological effects of the coated Ti pins compared with coated Ti pins fabricated at 37 °C.

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Influence of Calcium Phosphate and Apatite Containing ...

The aim of the present study was to compare the effect of a conventional fluoride preparation and of modern calcium phosphate or apatite containing prophylactic products on initial erosive mineral loss in a combined in situ/in vitro setup. Surface alterations and layer

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Calcium Phosphate Catalysts for Ethanol Coupling to ...

2020-8-7  Pretreatment of calcium phosphate at 973 K transformed the apatite structure to β-tricalcium phosphate, which exposed both acid and base sites evaluated by TEA and CO 2 adsorption microcalorimetry. High temperature pretreated calcium phosphate catalysts formed the coupling products butanol and butadiene during ethanol reaction.

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Calcium Phosphate Naturally Formed on Titanium in ...

2020-6-8  The results indicate that a calcium phosphate similar to apatite is naturally formed on titanium in a neutral electrolyte solution in 30 d. In regard to titanium being a biomaterial, we found this to be an intriguing property. It is possible that this calcium phosphate is responsible for the resulting biocompatibility of titanium.

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Apatite Formation on Calcium Phosphate Invert Glasses in ...

2004-12-20  Calcium phosphate invert glasses, which contain P 2 O 7 2− and PO 4 3− ions, have been prepared via the addition of a small amount of TiO 2.The formation of bonelike calcium phosphate apatite on the surface of the phosphate invert glasses was examined in simulated body fluid (SBF) at a temperature of 37°C.

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The Role of Brushite and Octacalcium Phosphate in Apatite ...

1992-1-1  Studies of apatite mineral formation are complicated by the possibility of forming several calcium phosphate phases. The least soluble, hydroxyapatite (HAP), is preferentially formed under neutral or basic conditions.

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High carbonate level of apatite in kidney stones ...

2021-10-16  However, many urinary stones—including struvite stones—also contain calcium phosphate in the mineral form of apatite, and this mineral retains imprints of bacteria , suggesting that it would be a likely source for retention of infectious agents that could be released during surgery.

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Apatite: Mineral information, data and localities.

"Apatite" is a field term for unidentified calcium phosphate members of the apatite group. Most "apatite" is fluorapatite, whereas hydroxylapatite is much less common and chlorapatite is very rare. "Apatite" crystals are short to long hexagonal prisms [0001], with {10 1 0} and {10 1 1} dominant; also thick tabular {0001}, frequently in the crystals of hydrothermal origin in pegmatites and ...

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Bone and Tooth Mineralization: Why Apatite? Elements ...

1997-4-2  Search. nav search search input Search input auto suggest. search filter. Search. Advanced Search. Abstract. Through evolution, vertebrates have “chosen” the calcium phosphate mineral apatite to mineralize their teeth and bones. This article describes the key characteristics of apatite in biological mineralization and explores how the ...

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CALCIUM PHOSPHATE STONES: Causes and Prevention

If the average calcium phosphate content is above 50% the patient is considered a calcium phosphate stone former. The average must be computed using 0 – for example, given CaOx/CaP percentages of 100/0, 0/100, 40/60, the correct classification is 140/3

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Influence of Calcium Phosphate and Apatite Containing ...

The aim of the present study was to compare the effect of a conventional fluoride preparation and of modern calcium phosphate or apatite containing prophylactic products on initial erosive mineral loss in a combined in situ/in vitro setup. Surface alterations and layer

More

The Calcium Phosphate Matrix of FGF-2-Apatite

2014-6-10  The purpose of the present study was to fabricate fibroblast growth factor (FGF)-2-apatite composite layers on titanium (Ti) pins in one step at 25 °C using a supersaturated calcium phosphate (CaP) solution, and to evaluate the physicochemical characteristics and biological effects of the coated Ti pins compared with coated Ti pins fabricated at 37 °C.

More

Influence of Calcium Phosphate and Apatite Containing ...

2016-6-26  The aim of the present study was to compare the effect of a conventional fluoride preparation and of modern calcium phosphate or apatite containing prophylactic products on initial erosive mineral loss in a combined in situ/in vitro setup. Surface alterations and

More

Energetics of lanthanide-doped calcium phosphate apatite ...

Energetics of lanthanide-doped calcium phosphate apatite ... search filter. Search. Advanced Search. Abstract ... (rare earths) are critical elements found in natural minerals such as calcium phosphate apatites, in sedimentary and igneous settings as well as in skeletal diagenesis. From a medical point of view, nanoparticles of lanthanide-doped ...

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Apatite Formation on Calcium Phosphate Invert Glasses in ...

2004-12-20  Calcium phosphate invert glasses, which contain P 2 O 7 2− and PO 4 3− ions, have been prepared via the addition of a small amount of TiO 2.The formation of bonelike calcium phosphate apatite on the surface of the phosphate invert glasses was examined in simulated body fluid (SBF) at a temperature of 37°C.

More

Mechanism of Calcium and Phosphate Release from

2000-5-1  Search within. Search term. Advanced Search Citation Search. Search term ... Mechanism of Calcium and Phosphate Release from Hydroxy-Apatite by Mycorrhizal Hyphae. Ricardo L.Lange Ness, ... Calcium was analyzed by atomic-absorption spectroscopy (PU9200X,

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Apatite: Mineral information, data and localities.

"Apatite" is a field term for unidentified calcium phosphate members of the apatite group. Most "apatite" is fluorapatite, whereas hydroxylapatite is much less common and chlorapatite is very rare. "Apatite" crystals are short to long hexagonal prisms [0001], with {10 1 0} and {10 1 1} dominant; also thick tabular {0001}, frequently in the crystals of hydrothermal origin in pegmatites and ...

More

Calcium-phosphate type hydroxyapatite - Toa Nenryo

1991-7-17  A calcium-phosphate hydroxyapatite comprising spherulites having a mean particle diameter of 0.5 to 50 μm and being prepared by granulating a calcium-phosphate type hydroxyapatite in the form of a gel to make apatite crystallite aggregates, each said crystallite of the aggregates having a size ranging from 0.01 to 0.05 μm wide and from 0.05 ...

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Bone and Tooth Mineralization: Why Apatite? Elements ...

1997-4-2  Search. nav search search input Search input auto suggest. search filter. Search. Advanced Search. Abstract. Through evolution, vertebrates have “chosen” the calcium phosphate mineral apatite to mineralize their teeth and bones. This article describes the key characteristics of apatite in biological mineralization and explores how the ...

More

Calcium phosphate clusters - ScienceDirect

The potential energy surfaces associated with [Ca 3 (PO 4) 2] n clusters are analyzed in detail using ab initio calculations for n ranging from one to four. Considering separated clusters, energy criteria favor the so-called Posner's cluster Ca 9 (PO 4) 6, which is the core of the actual structural model of amorphous calcium phosphate.This is rationalized through the existence of a distinct ...

More

Influence of Calcium Phosphate and Apatite Containing ...

2016-6-26  The aim of the present study was to compare the effect of a conventional fluoride preparation and of modern calcium phosphate or apatite containing prophylactic products on initial erosive mineral loss in a combined in situ/in vitro setup. Surface alterations and

More

Mechanism of Calcium and Phosphate Release from

2000-5-1  Search within. Search term. Advanced Search Citation Search. Search term ... Mechanism of Calcium and Phosphate Release from Hydroxy-Apatite by Mycorrhizal Hyphae. Ricardo L.Lange Ness, ... Calcium was analyzed by atomic-absorption spectroscopy (PU9200X,

More

Energetics of lanthanide-doped calcium phosphate apatite ...

Energetics of lanthanide-doped calcium phosphate apatite ... search filter. Search. Advanced Search. Abstract ... (rare earths) are critical elements found in natural minerals such as calcium phosphate apatites, in sedimentary and igneous settings as well as in skeletal diagenesis. From a medical point of view, nanoparticles of lanthanide-doped ...

More

Apatite Formation on Calcium Phosphate Invert Glasses in ...

2004-12-20  Calcium phosphate invert glasses, which contain P 2 O 7 2− and PO 4 3− ions, have been prepared via the addition of a small amount of TiO 2.The formation of bonelike calcium phosphate apatite on the surface of the phosphate invert glasses was examined in simulated body fluid (SBF) at a temperature of 37°C.

More

Bioactive calcium phosphate–based glasses and ceramics

2017-7-21  Apart from apatite formation, several other possible phases of calcium orthophosphates such as ACP, brushite CaHPO 4 2H 2 O (DCPD), monetite CaHPO 4 (DCPA) or octacalcium phosphate (OCP) can be formed in SBF depending on the experimental conditions of formation and state of ageing. 117 These calcium orthophosphates except ACP are more stable ...

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Apatite formation on alumina: The role of the initial ...

2014-4-1  1. Introduction. Chemical coatings of calcium phosphate apatite on different substrates have been reported for more than 20 years. The aim of these studies is to search for better techniques to coat mainly metallic surfaces; however, organic polymers and ceramics have also been investigated , .A number of works have been devoted to understand which characteristics a surface must fulfill to be ...

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Bone and Tooth Mineralization: Why Apatite? Elements ...

1997-4-2  Search. nav search search input Search input auto suggest. search filter. Search. Advanced Search. Abstract. Through evolution, vertebrates have “chosen” the calcium phosphate mineral apatite to mineralize their teeth and bones. This article describes the key characteristics of apatite in biological mineralization and explores how the ...

More

Calcium-phosphate type hydroxyapatite - Toa Nenryo

1991-7-17  A calcium-phosphate hydroxyapatite comprising spherulites having a mean particle diameter of 0.5 to 50 μm and being prepared by granulating a calcium-phosphate type hydroxyapatite in the form of a gel to make apatite crystallite aggregates, each said crystallite of the aggregates having a size ranging from 0.01 to 0.05 μm wide and from 0.05 ...

More

Calcium phosphate clusters - ScienceDirect

The potential energy surfaces associated with [Ca 3 (PO 4) 2] n clusters are analyzed in detail using ab initio calculations for n ranging from one to four. Considering separated clusters, energy criteria favor the so-called Posner's cluster Ca 9 (PO 4) 6, which is the core of the actual structural model of amorphous calcium phosphate.This is rationalized through the existence of a distinct ...

More

Bioactive calcium phosphate materials and applications in ...

2019-1-14  Calcium phosphates are minerals composed of calcium cations and phosphate anions. They are known as the major inorganic material in approximately 60% of all native human bones (Table 1).The existence of calcium phosphates in bones was first discovered in 1769, and in the 1800s, calcium phosphates that exist in bones were subdivided into different categories (Fig. 1) [11, 12].

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