Synthesis and solubility of calcium fluoride/hydroxy-fluorapatite nanocrystals for dental applications

Azami, Mahmoud; Jalili‐Firoozinezhad, Sasan; Mozafari, Masoud; Rabiee, Mohammad

doi:10.1016/j.ceramint.2011.02.025

Cited by 83 publications

(58 citation statements)

References 59 publications

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“…Apatit tanecik boyutlarının katkı maddeleri ve sıcaklık miktarı arasında bir ilişkisi vardır [20]. Sinterleme sıcaklığı arttıkça apatitlerin tane boyutları artmıştır [23]. Ayrıca, HA'nın tane yapısı 900 ve 1100ºC'de sinterledikten sonra nano boyutlu olmalarına karşın, 1300ºC'de sinterledikten sonra boyutlarda ciddi bir büyüme vardır [23].…”

Section: Bulgular Ve Tartişma (Results and Discussion)unclassified

“…Sinterleme sıcaklığı arttıkça apatitlerin tane boyutları artmıştır [23]. Ayrıca, HA'nın tane yapısı 900 ve 1100ºC'de sinterledikten sonra nano boyutlu olmalarına karşın, 1300ºC'de sinterledikten sonra boyutlarda ciddi bir büyüme vardır [23]. Şekil 5'e göre, sinterleme süresinin uzatılmasının numunelerin tane boyutları üzerinde önemli etkisi vardır.…”

Section: Bulgular Ve Tartişma (Results and Discussion)unclassified

“…Numunelerin tane boyutları, F -oranının artması ile artmıştır (Şekil 6). HA'ya Y +3 ve F -iyonlarının ilave edilmesiyle, HA'nın TCP'ye ayrışmasının engellendiğini ve bunun yoğunluk artışıyla sonuçlandığı bildirilmiştir [23]. Bu nedenle, F -iyonlarının HA'nın ayrışmasını önlemesinden dolayı numunelerin yoğunlukları üzerinde pozitif etkisi olduğu sonucuna varılmıştır.…”

Section: Bulgular Ve Tartişma (Results and Discussion)unclassified

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Flor İyonlari İlave Edi̇lmi̇ş Nano-Kalsi̇yum Fosfatlarin Mi̇kroyapisinin Araştirilmasi

Tahmasebifar¹,

Güngör²,

Evis³

2015

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖZETBu çalışmada, farklı kompozisyonlarda flor (F -) iyonları ilave edilmiş kalsiyum fosfatlar (CaP) çöktürme yöntemi ile üretilmiş ve mikroyapılarını incelemek için 1100ºC'de 1 ve 5 saat sinterlenmiştir. Sinterleme zamanının uzatılması ile sinterlenmiş malzemelerin yoğunluklarının arttığı gözlemlenmiştir. Ana faz olarak β-üç kalsiyum fosfatın (TCP) varlığı Rietveld yöntemi tarafından belirlenen yapısal analizlerle belirlenmiştir. Ayrıca örneklerde önemli miktarda hidroksiapatit (HA) tespit edilmiştir. İyonların ilave edilmesiyle birim kafes hacmi küçülmüştür. Taramalı elektron mikroskobu (SEM) sonuçları, iyonların eklenmesiyle daha küçük tanelerin oluştuğunu göstermiştir. Fourier dönüşümlü kızıl ötesi spektrometresi (FTIR), karakteristik TCP bantlarına ek olarak, F -iyonunun varlığını doğrulamıştır.Anahtar Kelimeler: Biyoseramikler; kalsiyum fosfatlar; katkılama; sinterleme THE MICRO-STRUCTURAL INVESTIGATION OF NANO-CALCIUM PHOSPHATES DOPED WITH FLUORIDE IONS ABSTRACTIn this study, fluoride (F -) doped calcium-phosphates (CaP) at various compositions were synthesized by a precipitation method and sintered at 1100ºC for 1 and 5 h to investigate their microstructures. It was observed that densities of the sintered materials were increased by extending the sintering time. The structural analysis determined by Rietveld refinement proved the presence of β-tri-calcium phosphate (TCP) as the main phase. Also, a considerable amount of hydroxyapatite (HA) was detected in the samples. Unit cell volumes shrinked upon ions substitution. Scanning electron microscopy (SEM) results showed that addition of doping ions resulted in smaller grains. In Fourier transform infrared spectroscopy (FTIR), in addition to the characteristic bands of TCP, F -ion substitution was confirmed.

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Section: Bulgular Ve Tartişma (Results and Discussion)unclassified

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Flor İyonlari İlave Edi̇lmi̇ş Nano-Kalsi̇yum Fosfatlarin Mi̇kroyapisinin Araştirilmasi

Tahmasebifar¹,

Güngör²,

Evis³

2015

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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“…2 In addition, the physiological significance of fluorine ions in promoting mineralization and crystallization of calcium phosphate in bone formation has been extensively studied. 3,4 Similar to HA, FA itself cannot be used for heavy load-bearing applications for bone substitutes due to its poor mechanical properties. Thus, most studies were focused on the mechanical or biological properties of FA in the form of coating.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, in this study nanofluorapatite (n-FA) was added into PA12 to form n-FA/PA bioactive composite, and the mechanical, hydrophilic, and antibacterial properties of both in vitro cells and in vivo bone tissue responses to n-FA/PA12 composites were reported. 4 and NH 4 F. The pH value of the solution was kept at 10~12 by adding ammonium hydroxide. After the precipitation reaction was complete, FA precipitate was obtained and fully washed with deionized water.…”

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confidence: 99%

Development of nanofluorapatite polymer-based composite for bioactive orthopedic implants and prostheses

Hu¹,

Wang²,

Yao³

et al. 2014

IJN

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Fluorapatite with low solubility is a promising biomaterial due to its structure, which is similar to hydroxyapatite. In this study a bioactive composite of nanofluorapatite (n-FA) and polyamide 12 (PA12) was fabricated. The results revealed that the mechanical properties (such as compressive strength and elastic modulus), hydrophilicity, and antibacterial properties of n-FA/PA12 composite were obviously improved by adding n-FA into PA12 as compared with PA12. In addition, cell proliferation of MC3T3-E1 cells cultured on n-FA/PA12 composite was significantly higher than with PA12, and alkaline phosphatase activity of MC3T3-E1 cells on the n-FA/PA12 composite was expressed at obviously higher levels as compared with PA12. The results suggest that n-FA/PA12 composite could support cell proliferation and differentiation, showing good cytocompatibility. Histological evaluation indicates that n-FA/PA12 composite enhances the efficiency of new bone formation with the introduction of n-FA into PA12, and the quantity of the newly formed bone for n-FA/PA12 composite is significantly higher than with PA12. In conclusion, n-FA/PA12 composite exhibits good biocompatibility and osteogenesis, which might be used for various orthopedic prostheses and dental implants.

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Characterization of light‐cured, dental‐resin‐based biocomposites

Okulus

Buchwald

Voelkel

2015

J of Applied Polymer Sci

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The dependence of the depth of cure (DOC) and degree of conversion (DC) on the depth of experimental and commercial materials were determined according to ISO 4049 procedure and with the use of Raman spectroscopy, respectively. Moreover, an attempt was made to find the correlation between the DOC and DC and the depth of the material. The hypothesis was that curing time recommended by the manufacturers is appropriate for curing both commercial and experimental materials to achieve comparable values of the examined properties. The impact of the filler characteristic was clearly observed. The longer curing time provides a deeper curing (DOC values) and higher reaction rate (DC); however, the dependence between the DC values and DOC values was not visible. Instead, a logarithmic trend in the relation of the DOC and curing time was clearly observed. The results of this study suggest that the experimental materials give some hope for potential clinical applications and should be further investigated.

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Synthesis and solubility of calcium fluoride/hydroxy-fluorapatite nanocrystals for dental applications

Cited by 83 publications

References 59 publications

Flor İyonlari İlave Edi̇lmi̇ş Nano-Kalsi̇yum Fosfatlarin Mi̇kroyapisinin Araştirilmasi

Flor İyonlari İlave Edi̇lmi̇ş Nano-Kalsi̇yum Fosfatlarin Mi̇kroyapisinin Araştirilmasi

Development of nanofluorapatite polymer-based composite for bioactive orthopedic implants and prostheses

Characterization of light‐cured, dental‐resin‐based biocomposites

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