کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10731589 | 1043284 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of gamma sterilization on microhardness of the cortical bone tissue of bovine femur in presence of N-Acetyl-L-Cysteine free radical scavenger
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of gamma sterilization on microhardness of the cortical bone tissue of bovine femur in presence of N-Acetyl-L-Cysteine free radical scavenger Effect of gamma sterilization on microhardness of the cortical bone tissue of bovine femur in presence of N-Acetyl-L-Cysteine free radical scavenger](/preview/png/10731589.png)
چکیده انگلیسی
Gamma sterilization is usually used to minimize the risk of infection transmission through bone allografts. However, it is believed that gamma irradiation affects the mechanical properties of allografts and free radical scavengers can be used to alleviate the radiation-induced degradation of these properties. The aim of this study was to investigate the radioprotective effects of N-Acetyl-L-Cysteine (NAC) free radical scavenger on the material properties of sterilized bovine cortical bone at microstructure level. Forty-two cortical tissue specimens were excised from three bovine femurs and irradiated to 35 and 70Â kGy gamma rays in the presence of 5, 50, and 100Â mM concentrations of NAC. The localized variations in microhardness were evaluated via indentation in the radial and longitudinal directions to examine different regions of the microstructures of the specimens, including the osteonal and interstitial tissues. A significant increase was observed in the hardness of osteonal, interstitial, and longitudinal combined microstructures exposed to 35 and 70Â kGy radiations (PÂ <Â 0.05), whereas a relative reduction of the hardness was observed in the radial direction. Furthermore, it was found that the application of 50 and 100Â mM NAC during gamma irradiation significantly subsided the hardening in longitudinal combined microstructure. Moreover, the reduction of hardness in radial direction was suppressed in the presence of 100Â mM of NAC. In conclusion, the results indicated that NAC free radical scavenger can protect the cortical bone against deteriorative effects of ionizing radiation and can be used to improve the material properties of sterilized allografts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica Medica - Volume 30, Issue 3, May 2014, Pages 314-319
Journal: Physica Medica - Volume 30, Issue 3, May 2014, Pages 314-319
نویسندگان
Farzaneh Allaveisi, Bijan Hashemi, Seyed Mohammad Javad Mortazavi,