Biomaterials Quiz

a non-viable material used in a medical device intended to interact with biological systems

Any material used to make devices to replace a part or a \n function of the body in a safe, reliable, economic, and physiologically acceptable manner.

Metals, polymers, ceramics, composites

Biopolymers, tissue derived (collagen), tissues

Titanium, titanium alloys, cobalt-chromium, allografts

Hydroxyapatite, stem cell

Biosensors, microfluids, nanofabrication, neural computing

Biocompatible

Stiffness, area/mass, moment of inertia

Elastic modulus, viscoelasticity, fatigue life

Acceptance of an artificial implant by the \n surrounding tissues and by the body as a \n whole (doesn’t degrade or degrades without harm)

• Biocompatibility

• Physical & mechanical properties

• Biological fixation properties

• Easy to make and sterilize

  • Can function in vivo

• Design

• Structural requirements

• Clinical requirements

• Regulatory (FDA)

• Processing

  • Materials selection

• Tension/compression

• Shear/torsion

• Bending

• Hardness

• Surface roughness

• Surface crystallinity

• Surface energy (hydrophilicity)

Force / Area

Change in length / Original Length

Stress = Modulus * Strain

Resistance to volume change (lateral strain over longitudinal strain)