Exam 27.01.20 Biocompatible Materials (New Professor)

453 Biomedical Engineering Biocompatible Materials
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Biocompatible materials (27.01.2020)

  1. There is a drawing of a cubic face centered unit. Calculate volume ratio (volume of spheres over volume of the cube)

  2. How can materials be classified depending on their bonds ? How can they be classified depending on their structure ?

  3. What is a ceramic ? A glass ? A glass ceramic ?

  4. What are the advantages and disadvantages of ceramic in dental applications ?

  5. What are the typical bonds within and between polymers ? Why is the melting point of thermoplastics low ?

  6. Why is the thermal expansion of low melting material higher than for high melting materials ? Explain by drawing the energy vs atom distance curve of both materials.

  7. What is the strenghtening mechanism in tetragonal zirconium? Why does it make it stronger and tougher ?

:sunglasses: Draw a typical stress strain curve. Show how elastic modulus, tensile strength, 0.2% yield strength and final elongation can be found.

  1. What are the information contained in a biocompatibility matrix ?

  2. What are the four stages of wound healing ? How can wound dressing help with wound healing ?

  3. What are the difference between long bone fracture healing and cranial fracture healing ?

  4. steam sterilization