Composite ceramic containing a bioresorbable phase

Сафронова, Т. В.; Putlyaev, V. I.; Shekhirev, Mikhail; Kuznetsov, A. V.

doi:10.1007/s10717-007-0027-2

Cited by 23 publications

(18 citation statements)

References 9 publications

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“…At this point, the linear shrinkage of the samples №3 was 12.75%. Bringing these facts together with the previous data on the monetite powder synthesized from (NH 4 ) 2 HPO 4 and Са(NO 3 ) 2 for fabrication of CPP-ceramics [2], it should be noted that relative density of ceramics based on monetite powder were higher (about 80%) than the one (about 65%) based on brushite (the powder №1 in the present work).…”

Section: Resultssupporting

confidence: 80%

“…It has been established that syntheses of insoluble calcium phosphate from the solutions of (NH 4 ) 2 HPO 4 and calcium salts (Ca(NO 3 ) 2 , CaCl 2 and Ca(CH 3 COO) 2 ) with Са/Р = 1 and without pH control lead to fabrication of ceramics with different microstructure and phase composition. These differences arise from the variation of pH level in the solutions during precipitation, and are dictated by the anion composition of the starting solutions.…”

Section: Resultsmentioning

confidence: 99%

“…According to the regenerative approach, bone implant materials have to consist of both bioresistive and bioresorbable phases. Among calcium phosphates, the most bioresistive one is hydroxyapatite, Ca 10 (PO 4 ) 6 (OH) 2 (HAp) with Ca/P = 1.67. Other calcium phosphates with Ca/P less than 1.67 are considered as resorbable phases.…”

Section: Introductionmentioning

confidence: 99%

“…The most extensively used biphasic ceramic composite material consists of HAp as a resistive phase and tricalcium phosphate Ca 3 (PO 4 ) 2 (TCP) with Ca/P = 1.5 [1] as a resorbable phase. Calcium pyrophosphate Ca 2 P 2 O 7 (CPP) [2][3][4][5], rhenanite NaCaPO 4 [6], calcium carbonate СaCO 3 [7] and some glasses [8] can be treated as alternative resorbable phases. Combination(s) of listed phases can be used for tuning the rate and the limit of biomaterials degradation.…”

Section: Introductionmentioning

confidence: 99%

“…Less attention was paid to synthesis of calcium phosphates with Ca/P = 1, such as brushite (CaHPO 4 •2H 2 O), and monetite (CaHPO 4 ), CPP. Resorbable composite materials containing a CPP-phase can be fabricated from the mixture of HAp and monetite [2], or from the mixture of HAp and milled calcium-phosphate glass [4]. Ceramic composite materials with a CPP-phase can be made either from commercially available [3], or synthesized [5] powders when the sintering additive of Na 4 P 2 O 7 is used.…”

Section: Introductionmentioning

confidence: 99%

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Calcium phosphate powders synthesized from solutions with [Ca2+]/[PO43−]=1 for bioresorbable ceramics

et al. 2009

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Calcium phosphate powders for manufacturing bioceramics were synthesized via precipitation from stock solutions of (NH 4 ) 2 HPO 4 and Ca(NO 3 ) 2 , or CaCl 2 or Ca(CH 3 COO) 2 with [Ca 2+ ]/[PO 43-] = 1, without pH regulation. Properties of powdered samples, including density and microstructure of ceramics sintered at 900, 1000, 1100°C, were studied. The following pairs of precursors such as Ca(NO 3 ) 2 /(NH 4 ) 2 HPO 4 , CaCl 2 /(NH 4 ) 2 HPO 4 , Ca(CH 3 COO) 2 /(NH 4 ) 2 HPO 4 gave both insoluble calcium phosphates and the corresponding by-products of synthesis -NH 4 NO 3 , NH 4 Cl, NH 4 CH 3 COO. These by-products were released from the calcium phosphate precipitates in the course of heating to the temperature of sintering. Owing to specific buffer properties of the solutions being formed during synthesis, the pH value varied in a wide range during the precipitation process leading to different final values of pH and, thus, to different target phase(s) after annealing at 900 -1100°C. After sintering, the samples based on the powders synthesized from Ca(NO 3 ) 2 /(NH 4 ) 2 HPO 4 consisted of β-Ca 2 P 2 O 7 , whereas the samples based on the powders derived from CaCl 2 /(NH 4 ) 2 HPO 4 were composed of β-Ca 2 P 2 O 7 and β-Ca 3 (PO 4 ) 2 , and the samples based on the powders synthesized from Ca(CH 3 COO) 2 /(NH 4 ) 2 HPO 4 contained only β-Ca 3 (PO 4 ) 2 . All the powders can be considered as the precursors for fabrication of bioceramics with enhanced resorption. Warsaw and Springer-Verlag Berlin Heidelberg. © Versita

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Calcium phosphate powders synthesized from solutions with [Ca2+]/[PO43−]=1 for bioresorbable ceramics

et al. 2009

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Phase composition of powdered material based on calcium hydroxyapatite and sodium dihydrophosphate

et al. 2009

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Powder mixtures based on calcium hydroxyapatite (HAP) and sodium dihydrophosphate are investigated. It is established that calcium phosphates with Ca : P = 1 are formed in these mixtures as a result of mechanochemical activation. On heating each component of the mixture undergoes a change: HAP (Ca : P = 1.67) partially transforms into tricalcium phosphate (Ca : P = 1.5), the low-temperature calcium phosphates brushite and monetite (Ca : P = 1) transform into calcium pyrophosphate, NaH 2 PO 4 transforms into NaPO 3 , and Na 2 HPO 4 transforms into Na 4 P 2 O 7 . In the process the components interact with one another with double sodium calcium ortho-and metaphosphates being formed.

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Use of titanium dioxide for the development of antibacterial glass enamel coatings

Саввова

Bragina

2010

Glass Ceram

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It is shown that titanium dioxide is useful for developing antibacterial glass enamel coatings. Antibacterial powder (filler) was synthesized on the basis of hydroxyapatite modified with titanium oxide, and its phase composition was investigated. It was established that the composite glass enamel coatings studied are characterized by a substantial antibacterial and antifungal effect from 70 to 90% with synthesized inorganic filler content from 1 to 5% with Ti 4+ /(Ti 4+ + Ca 2+ ) ratio equal ratio 0.04 -0.07.

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Composite ceramic containing a bioresorbable phase

Cited by 23 publications

References 9 publications

Calcium phosphate powders synthesized from solutions with [Ca2+]/[PO43−]=1 for bioresorbable ceramics

Calcium phosphate powders synthesized from solutions with [Ca2+]/[PO43−]=1 for bioresorbable ceramics

Phase composition of powdered material based on calcium hydroxyapatite and sodium dihydrophosphate

Use of titanium dioxide for the development of antibacterial glass enamel coatings

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