Hydrothermal conversion of calcite foam to carbonate apatite

N. X T Tram; M. Maruta; K. Tsuru; S. Matsuya; Kunio Ishikawa

Hydrothermal conversion of calcite foam to carbonate apatite

N. X T Tram, M. Maruta, K. Tsuru, S. Matsuya, Kunio Ishikawa

Oral Rehabilitation

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We have previously reported an inverse ceramic foam method aiming to improve mechanical strength of calcite foam that has interconnected porous structure. The modified foam was obtained by multiple Polyurethane coating. In previous study, calcium hydroxide (Ca(OH)₂) slurry was poured into the foam. After drying, the foam was burnt out to remove polyurethane and to carbonate Ca(OH)₂ under mixed O₂-CO₂ atmosphere. Ca(OH)₂ was completely converted to calcite. Those calcite foams are the useful precursors for the preparation of the three-dimensional (3D) interconnected porous carbonate apatite (CO ₃AP) foam. Therefore, we investigated the hydrothermal treatment of calcite foam to CO₃AP foam in phosphate solution. The results indicated that the conversion ratio depends on the degree of porosity of calcite precursor and calcite foam was completely transformed to CO₃Ap foam at 100°C for 14 days. The CO₃AP foam showed the increase in the compressive strength compared to conventional foam. So, it is concluded that CO₃Ap foam fabricated in this study could be a good candidate for the bone replacement material in clinical application.

Original language	English
Title of host publication	Advances in Bioceramics and Porous Ceramics VI - A Collection of Papers Presented at the 37th International Conference on Advanced Ceramics and Composites, ICACC 2013
Pages	59-65
Number of pages	7
Volume	34
Edition	6
Publication status	Published - 2014
Event	Advances in Bioceramics and Porous Ceramics VI - 37th International Conference on Advanced Ceramics and Composites, ICACC 2013 - Daytona Beach, FL, United States Duration: Jan 27 2013 → Feb 1 2013

Other

Other	Advances in Bioceramics and Porous Ceramics VI - 37th International Conference on Advanced Ceramics and Composites, ICACC 2013
Country/Territory	United States
City	Daytona Beach, FL
Period	1/27/13 → 2/1/13

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

Cite this

Hydrothermal conversion of calcite foam to carbonate apatite. / Tram, N. X T; Maruta, M.; Tsuru, K. et al.

Advances in Bioceramics and Porous Ceramics VI - A Collection of Papers Presented at the 37th International Conference on Advanced Ceramics and Composites, ICACC 2013. Vol. 34 6. ed. 2014. p. 59-65.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Tram, NXT, Maruta, M, Tsuru, K, Matsuya, S & Ishikawa, K 2014, Hydrothermal conversion of calcite foam to carbonate apatite. in Advances in Bioceramics and Porous Ceramics VI - A Collection of Papers Presented at the 37th International Conference on Advanced Ceramics and Composites, ICACC 2013. 6 edn, vol. 34, pp. 59-65, Advances in Bioceramics and Porous Ceramics VI - 37th International Conference on Advanced Ceramics and Composites, ICACC 2013, Daytona Beach, FL, United States, 1/27/13.

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PY - 2014

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N2 - We have previously reported an inverse ceramic foam method aiming to improve mechanical strength of calcite foam that has interconnected porous structure. The modified foam was obtained by multiple Polyurethane coating. In previous study, calcium hydroxide (Ca(OH)2) slurry was poured into the foam. After drying, the foam was burnt out to remove polyurethane and to carbonate Ca(OH)2 under mixed O2-CO2 atmosphere. Ca(OH)2 was completely converted to calcite. Those calcite foams are the useful precursors for the preparation of the three-dimensional (3D) interconnected porous carbonate apatite (CO 3AP) foam. Therefore, we investigated the hydrothermal treatment of calcite foam to CO3AP foam in phosphate solution. The results indicated that the conversion ratio depends on the degree of porosity of calcite precursor and calcite foam was completely transformed to CO3Ap foam at 100°C for 14 days. The CO3AP foam showed the increase in the compressive strength compared to conventional foam. So, it is concluded that CO3Ap foam fabricated in this study could be a good candidate for the bone replacement material in clinical application.

AB - We have previously reported an inverse ceramic foam method aiming to improve mechanical strength of calcite foam that has interconnected porous structure. The modified foam was obtained by multiple Polyurethane coating. In previous study, calcium hydroxide (Ca(OH)2) slurry was poured into the foam. After drying, the foam was burnt out to remove polyurethane and to carbonate Ca(OH)2 under mixed O2-CO2 atmosphere. Ca(OH)2 was completely converted to calcite. Those calcite foams are the useful precursors for the preparation of the three-dimensional (3D) interconnected porous carbonate apatite (CO 3AP) foam. Therefore, we investigated the hydrothermal treatment of calcite foam to CO3AP foam in phosphate solution. The results indicated that the conversion ratio depends on the degree of porosity of calcite precursor and calcite foam was completely transformed to CO3Ap foam at 100°C for 14 days. The CO3AP foam showed the increase in the compressive strength compared to conventional foam. So, it is concluded that CO3Ap foam fabricated in this study could be a good candidate for the bone replacement material in clinical application.

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Hydrothermal conversion of calcite foam to carbonate apatite

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