Metals as Biomaterials

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Which property of metals makes them suitable as biomaterials?

Excellent electrical conductivity
Excellent thermal conductivity
Excellent mechanical properties
All of the above (correct)

What is the role of mobile free electrons in metals?

They act as a binding force between metal ions
They transfer thermal energy
They transfer electric charge
All of the above (correct)

What is the result of the closely packed atomic arrangement in metals?

Low specific gravity
High melting points
Low melting points
High specific gravity (correct)

What allows the position of metal ions to be altered without destroying the crystal structure?

Metallic bond (B) Signup and view all the answers

Which of the following is NOT a use of metals as biomaterials?

Hearing aids (A) Signup and view all the answers

What are some reasons why metals are used as biomaterials?

Metals are used as biomaterials due to their excellent electrical and thermal conductivity, mechanical properties, and corrosion resistance. Signup and view all the answers

What role do mobile free electrons play in metals as biomaterials?

Mobile free electrons in metals act as a binding force to hold the positive metal ions together and enable the quick transfer of electric charge and thermal energy. Signup and view all the answers

How does the closely packed atomic arrangement in metals affect their properties?

The closely packed atomic arrangement in metals results in high specific gravity and high melting points. Signup and view all the answers

What allows the position of metal ions to be altered without destroying the crystal structure?

The metallic bond, which is essentially nondirectional, allows the position of metal ions to be altered without destroying the crystal structure. Signup and view all the answers

What are some examples of medical applications of metals as biomaterials?

Some examples of medical applications of metals as biomaterials include total hip and knee joints, bone plates and screws for fracture healing, spinal fixation devices, and dental implants. Signup and view all the answers

Which law defines the flux (movement) of a drug across a non-porous polymer membrane?

Fick’s first law of diffusion (D) Signup and view all the answers

If a polymer membrane is porous, what law would define the flux of a drug across the membrane?

Fick’s second law of diffusion (B) Signup and view all the answers

What is the relationship between the porosity of a polymer membrane and the law that defines the flux of a drug across the membrane?

Porous membrane - Fick’s first law of diffusion (D) Signup and view all the answers

Which law defines the flux (movement) of a drug across a non-porous polymer membrane?

Fick's second law of diffusion (D) Signup and view all the answers

If a polymer membrane is porous, what law would define the flux of a drug across the membrane?

Fick's second law of diffusion (D) Signup and view all the answers

What determines the movement of a drug across a non-porous polymer membrane?

The concentration gradient of the drug (C) Signup and view all the answers

Metal biomaterials: suitability

Metals are suitable for biomaterials due to their conductivity, mechanical strength, and corrosion resistance.

Free electrons in metals

Mobile electrons in metals conduct electricity and heat.

Metal atomic arrangement

Closely packed atoms give metals high density and melting points.

Metal ion position change

Metal ions can shift without breaking the crystal structure due to the nondirectional metallic bond.