problem 8 Biomaterials The Intersection of Biology and Mater

problem 8

Biomaterials: The Intersection of Biology and Materials Science An extrusion technique was employed to fabricate a square polymer sample 4 cm X 4 cm X 0.5 cm. The extrusion process has resulted in the vast\' majority of the polymer chains being aliened preferentially in one direction as shown. In which direction, then, should a tensile force be applied to the sample to result in the greatest resistance to the applied force? Why? Various biomaterials can be used for joint replacement applications, such as hip implants. Which of the three major types of biomaterials t & would you use for the femoral stem? Why? Would integration of the femoral stem with the surrounding tissue be an acceptable biological response? Why or why not?

Solution

Solution of option A

Both the Metals and ceramics can be present in the hip replacement. metals being strong and because of its strength, it is used in the core of the stem. This is because they can be easily molded into complex shapes. Ceramics can be used on the surface of the stem to facilitate its integration with the bone.

Solution of option B

The integration of the implant stem with the bone will be desirable, as it will fix the implant better with the surrounding tissue. If the integration is done at the joint space, it is undesirable, as it will impair the movement.