Investigation of changes in phases and properties of a TTCP/DCPA/CSH cement immersed in Hanks' solution

Jiin Huey Chern Lin, Szu Yao Yu, Chang Keng Chen, Wei Luen Chen, Jing Wei Lee, Ruey Mo Lin, Chien Ping Ju

Research output: Contribution to journalArticle

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Abstract

Investigated in this study are the changes in structure and properties of a tetracalcium phosphate/dicalcium phosphate anhydrous/calcium sulfate hemihydrate (TTCP/DCPA/CSH) cement immersed in Hanks' solution. Experimental results show that the phase transition involving the hydration of CSH and formation of calcium sulfate dihydrate (CSD) continues up to 7 d of immersion. The phase transition from TTCP/ DCPA to hydroxyapatite (HA) is substantially completed after 14 d; after that, both CSH and CSD phase largely diminished, whereas HA becomes and remains to be the only dominant phase throughout 42 d of immersion. A maximum compressive strength is reached; after that, the cement gradually decreases in strength. After 42 d, its CS value is down to 8MPa. The long-term pH value of the Hanks' solution wherein the cement is immersed remains in the range between 5.4 and 7.0. The cytotoxicity test reveals that the viability value of the cells incubated with conditioned medium of cement extraction is 85% that of Al2O3 control and 84% that of blank medium for an extraction ratio of 0.2; and 90% that of Al 2O3 control and 93% that of blank medium for an extraction ratio of 0.1.

Original languageEnglish
Pages (from-to)1949-1953
Number of pages5
JournalMaterials Transactions
Volume52
Issue number10
DOIs
Publication statusPublished - 2011 Nov 11

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Calcium Sulfate
calcium phosphates
Calcium phosphate
cements
sulfates
phosphates
Cements
Phosphates
blanks
Durapatite
Hydroxyapatite
submerging
calcium
Calcium
Phase transitions
compressive strength
Cytotoxicity
Conditioned Culture Medium
viability
Hydration

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Chern Lin, Jiin Huey ; Yu, Szu Yao ; Chen, Chang Keng ; Chen, Wei Luen ; Lee, Jing Wei ; Lin, Ruey Mo ; Ju, Chien Ping. / Investigation of changes in phases and properties of a TTCP/DCPA/CSH cement immersed in Hanks' solution. In: Materials Transactions. 2011 ; Vol. 52, No. 10. pp. 1949-1953.
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Investigation of changes in phases and properties of a TTCP/DCPA/CSH cement immersed in Hanks' solution. / Chern Lin, Jiin Huey; Yu, Szu Yao; Chen, Chang Keng; Chen, Wei Luen; Lee, Jing Wei; Lin, Ruey Mo; Ju, Chien Ping.

In: Materials Transactions, Vol. 52, No. 10, 11.11.2011, p. 1949-1953.

Research output: Contribution to journalArticle

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AB - Investigated in this study are the changes in structure and properties of a tetracalcium phosphate/dicalcium phosphate anhydrous/calcium sulfate hemihydrate (TTCP/DCPA/CSH) cement immersed in Hanks' solution. Experimental results show that the phase transition involving the hydration of CSH and formation of calcium sulfate dihydrate (CSD) continues up to 7 d of immersion. The phase transition from TTCP/ DCPA to hydroxyapatite (HA) is substantially completed after 14 d; after that, both CSH and CSD phase largely diminished, whereas HA becomes and remains to be the only dominant phase throughout 42 d of immersion. A maximum compressive strength is reached; after that, the cement gradually decreases in strength. After 42 d, its CS value is down to 8MPa. The long-term pH value of the Hanks' solution wherein the cement is immersed remains in the range between 5.4 and 7.0. The cytotoxicity test reveals that the viability value of the cells incubated with conditioned medium of cement extraction is 85% that of Al2O3 control and 84% that of blank medium for an extraction ratio of 0.2; and 90% that of Al 2O3 control and 93% that of blank medium for an extraction ratio of 0.1.

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