Effect of gamma radiation on properties of a calcium phosphate-calcium sulfate composite cement

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The present study investigates γ-radiation effect on structure and selected properties of a tetracalcium phosphate (TTCP)/dicalcium phosphate anhydrous (DCPA)/calcium sulfate hemihydrate (CSH) cement immersed in Hanks' solution. The results indicate that, at a dosage of 25 kGy, the working and setting times of the cement paste derived from γ-ray-sterilized TTCP/DCPA/CSH powder did not change significantly. At 50 kGy or higher, however, both significantly decreased. A dose of 25 kGy caused the 1-d compressive strength of the cement to decrease by 15%. Further increases in γ-ray dose did not further change the strength. After immersion for 1 day, the pH values of all non-sterilized and sterilized samples were in the range of 7.68.0. The XRD patterns of non-sterilized and sterilized powders were substantially similar. After immersion for 1 day, TTCP phase was still distinguishable, while CSH peaks were largely diminished and apatite phase became dominant. The non-sterilized sample had a significantly higher apatite conversion ratio than those of γ-ray-sterilized samples. The average 1-d porosity values of all sterilized and non-sterilized samples were similar (3133%). The γ-ray-sterilized cement samples had coralline type morphology with numerous tiny apatite crystals and micropores. Compared to the sterilized samples, the non-sterilized cement showed a smoother and denser morphology.

Original languageEnglish
Pages (from-to)1160-1165
Number of pages6
JournalMaterials Transactions
Volume54
Issue number7
DOIs
Publication statusPublished - 2013 Jul 26

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Calcium Sulfate
calcium phosphates
Calcium phosphate
cements
Gamma rays
calcium
Calcium
sulfates
Cements
Apatites
gamma rays
Apatite
composite materials
rays
Composite materials
apatites
Phosphates
phosphates
Powders
dosage

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "The present study investigates γ-radiation effect on structure and selected properties of a tetracalcium phosphate (TTCP)/dicalcium phosphate anhydrous (DCPA)/calcium sulfate hemihydrate (CSH) cement immersed in Hanks' solution. The results indicate that, at a dosage of 25 kGy, the working and setting times of the cement paste derived from γ-ray-sterilized TTCP/DCPA/CSH powder did not change significantly. At 50 kGy or higher, however, both significantly decreased. A dose of 25 kGy caused the 1-d compressive strength of the cement to decrease by 15{\%}. Further increases in γ-ray dose did not further change the strength. After immersion for 1 day, the pH values of all non-sterilized and sterilized samples were in the range of 7.68.0. The XRD patterns of non-sterilized and sterilized powders were substantially similar. After immersion for 1 day, TTCP phase was still distinguishable, while CSH peaks were largely diminished and apatite phase became dominant. The non-sterilized sample had a significantly higher apatite conversion ratio than those of γ-ray-sterilized samples. The average 1-d porosity values of all sterilized and non-sterilized samples were similar (3133{\%}). The γ-ray-sterilized cement samples had coralline type morphology with numerous tiny apatite crystals and micropores. Compared to the sterilized samples, the non-sterilized cement showed a smoother and denser morphology.",
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Effect of gamma radiation on properties of a calcium phosphate-calcium sulfate composite cement. / Chen, Chang Keng; Ju, Chien-Ping; Lee, Jing-Wei; Chern, Jiin-Huey.

In: Materials Transactions, Vol. 54, No. 7, 26.07.2013, p. 1160-1165.

Research output: Contribution to journalArticle

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