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Explain about Bioactive materials
Bioactive materials: Certain glasses, ceramics, and glass-ceramics that contain oxides of silicon, sodium, calcium and phosphorus (SiO2 , Na2O, CaO, and P2O5 ) form a chemical bond with bone, resulting in a strong mechanical implant bone bond. These materials do bond to bone through a time-dependent, kinetic modification of the surface triggered by their implantation within living bone. An ion-exchange reaction between the bioactive implant and surrounding body fluids results in the formation of a biologically active calcium phosphate layer on the implant. This layer is chemically and crystallographically equivalent to the mineral phase in bone which is responsible for the strong interfacial bonding.
State about osteogenesis Embryologically, osteogenesis may be classified as either intramembranous or endochondral. When the ossification occurs directly, it is defined as intr
Nutrition of Embryo Sac The morphology of the ovule suggests that the chalazal end is the main route for the entry of nutrients. The funicular vascular supply ends at the bas
Assignment on CAM
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