Apatite cement (AC) is generally weak against bacterial infection. Although antibiotic addition to AC is effective to prevent bacterial infection, it is primarily required for the AC to be sterilized. Since there is little information on the sterilization methods of AC, the aims of this investigation is to evaluate the effects of various sterilization methods on the setting and mechanical properties of AC. The setting time of AC retarded with an increase in exposed γ-ray irradiation dose. The wet diametral tensile strength (DTS) value decreased with the increase in exposure γ-ray irradiation dose. There was no compositional change due to the γ-ray irradiation. The following was tested in order to examine the effect of the γ-ray irradiation on setting reaction of AC in detail, tetracalcium phosphate (TTCP; Ca4(PO4)2O) and dicalcium phosphate anhydrous (DCPA; CaHPO4) were separately irradiated, and the cement was produced using irradiated powder and not irradiated powder. Although the wet DTS value of AC produced from irradiated TTCP and unirradiated DCPA decreased with the increase in exposure γ-ray irradiation dose, there was no significantly difference. In contrast, the wet DTS value of AC produced from irradiated DCPA and unirradiated TTCP significantly decreased with the increase in exposure γ-ray irradiation dose. In conclusion, although the detailed mechanism of the delayed setting time and decreased DTS value has not been clarified in the present study, it was found that γ-ray irradiation affected more on DCPA than TTCP.
|ジャーナル||Key Engineering Materials|
|出版ステータス||出版済み - 1 1 2002|
|イベント||14th International Symposium on Ceramics in Medicine-Annual Meeting of the International Society for Ceramics in Medicine BIOCERAMICS'01 (ISCM) - Palm Springs, CA, 米国|
継続期間: 11 14 2001 → 11 17 2001
All Science Journal Classification (ASJC) codes