implants

Question 1

titanium alloy abbreviation and composition

Answer 1

Ti6A4V
6% aluminum
4% vanadium

Question 2

aluminum does what? vanadium does what?

Answer 2

aluminum –> increases the MECHANICAL properties of implant

vanadium –> increases the resistance against corrosion

Question 3

histological representation in contact bone formation

Answer 3

1. No soft tissue
   
   2. Implant sits on the bone
   3. More stable
   4. Histological
      a. No brown collar staining fibrous tissue
      b. Best outcome
      c. We want this
   5. 95% success rate must meet this criteria

Question 4

HA used where? why?

Answer 4

thin layer coating

• high compression strength
• excellent wear properties
• biological compatibility
• higher crystallinity

Question 5

two types of bone formation around implants

Answer 5

1. distant bone formation

2. contact bone formation

Question 6

distant bone formation

Answer 6

failure of osteogenic cell attachment to the implant surface after implantation where you get a layer of FIBROUS TISSUE between implant material and solid bone tissue

• does not give implant support it needs

Question 7

radiofrequence glow discharge - general

Answer 7

method provides plasma cleaning treatment and uses argon

Question 8

radio frequency glow discharge effects

Answer 8

1. increased wettability
2. increased surface energy
3. decrease surface contact angle

because it strips away the organic contaminents, sterilizes the surface, reforms the oxide layer opening the unsaturated bonds,