Metals and Ceramics

What is NOT a common metallic biomaterials?

• Stainless Steel

• Cobalt Chromium Alloy

• Titanium

• Iron

Which material has the highest Young's modulus?

• A

• B

• C

• D

What is NOT an advantage of stainless steel as biomaterials

• Strength

• Wear Resistant

• Biocompatibility

• Elastic modulus close to natural bone

The high corrosion resistance of titanium (Ti) and its alloys is attributed to

• Addition of Cr element

• Low Young's Modulus

• its low reactivity as a noble metal

• Presence of a stable TiO₂ coating on surface

Wear particles can lead to implant failure because

• they weaken the implant

• they activate immune response

• they cause osteolysis

• All options are correct

Which material has highest wear resistant?

• Stainless steel

• Al₂O₃

• polymer UHMWPE

• hydroxyapatite

Compared to Generation 1 ceramics, Generation 2 ceramics are ____

• more corrosion resistant

• form stronger bond with bone

• more wear resistant

• very malleable

Bioglass has Young's modulus closer to that of cortical bone compared to stainless steel

• TRUE

• FALSE

Bioglass

• has highly ordered crystalline structure

• is amorphous

• is not bioactive

• contains CaO but not SiO₂

Which one degrade the fastest in vivo

• Al₂O₃

• amorphous tricalcium phosphate

• hydroxyapatite crystals

• titanium