BME 318 Study Guide - Midterm Guide: Bravais Lattice, Coble Creep, Nuclear Magnetic Resonance Spectroscopy
Document Summary
Host response: calculate and control foreign body response. Metals: inorganic with non-directional metallic bonds, alloys: combo of multiple elemental metals iii. pro: mechanical strength. Ceramics: inorganic with non-directional ionic bonds ii. pros: resistance to degradation, hard metal properties, cons: brittle. Polymers: organic with directional covalent bonds, pros: tailor physical and chemical properties, exp of biodegradable- polyfumarates; exp of non-biodegradable: silicone, Natural/biologically derived materials: proteins-fibrin, collagen, polysaccharides, pros: bioactive, cons: production and sterilization. Explain the differences between the three types of primary bonds. Nondirectional (ceramics: transfer electrons, nondirectional bonds= same magnitude in all directions. Covalent=variable bond energy directional (ceramics, polymers: pi bonds- double bond, share valence electrons. Metallic=variable bond energy nondirectional(metals: electrons donate to entire structure sea of electrons. Value less than 50 is covalent or metallic ( covalent if 2 non metals, metallic if metal and non-metal) High energy = low radius (distance from one atom to another) Crystalline materials- atoms pack in 3d arrays: metals, ceramics, polymers.
