Effect of Gamma Radiation on Properties of a Calcium Phosphate-Calcium Sulfate Composite Cement
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- Chen Chang-Keng
- Department of Materials Science and Engineering, National Cheng-Kung University
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- Ju Chien-Ping
- Department of Materials Science and Engineering, National Cheng-Kung University
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- Lee Jing-Wei
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng-Kung University Medical College and Hospital
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- Lin Jiin-Huey Chern
- Department of Materials Science and Engineering, National Cheng-Kung University
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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 7.6–8.0. 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 (31–33%). 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.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 54 (7), 1160-1165, 2013
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390001204249662208
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- NII論文ID
- 10031183662
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- NII書誌ID
- AA1151294X
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- COI
- 1:CAS:528:DC%2BC3sXhsVGjtrfJ
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 024647591
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用不可