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Biomaterial, orthopeadics

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https://www.readbyqxmd.com/read/28864248/regulation-of-immune-response-by-bioactive-ions-released-from-silicate-bioceramics-for-bone-regeneration
#1
Yan Huang, Chengtie Wu, Xiaoling Zhang, Jiang Chang, Kerong Dai
Silicate bioceramics have been considered to possess a wide prospect of clinical application for orthopedic tissue regeneration due to their excellent osteogenesis and angiogenesis. However, the mechanism for silicate bioceramics stimulating bone formation is not fully understood. The host immune defense to implants is proved to greatly influence the osteogenesis and new bone formation, but up to now, few studies are focused on the silicate bioceramics modulated host immune responses. In our present study, two representative silicate bioceramics, akermanite (AKT) and nagelschmidtite (NAGEL) were used as model materials to investigate the inflammation responses in vitro and in vivo, and β-tricalcium phosphate (β-TCP) bioceramics were used as a control...
August 29, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/27104932/the-mechanical-and-tribological-properties-of-uhmwpe-loaded-aln-after-mechanical-activation-for-joint-replacements
#2
Kemeng Gong, Shuxin Qu, Yumei Liu, Jing Wang, Yongchao Zhang, Chongxi Jiang, Ru Shen
Ultra-high molecular weight polyethylene (UHMWPE) loaded with alendronate sodium (ALN) has tremendous potential as an orthopeadic biomaterial for joint replacements. However, poor mechanical and tribological properties of UHMWPE-ALN are still obstacle for further application. The purpose of this study was to investigate the effect and mechanism of mechanical activation on mechanical and tribological properties of 1wt% ALN-loaded UHMWPE (UHMWPE-ALN-ma). In this study, tensile test, small punch test and reciprocating sliding wear test were applied to characterize the mechanical and tribological properties of UHMWPE-ALN-ma...
August 2016: Journal of the Mechanical Behavior of Biomedical Materials
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