Lecture 1

Question 1

What is the typical extension of the atom ? And volume ?

Answer 1

0.1 nm = 1 Angstrom
V = 1 A^3

Question 2

Definition of biomaterial

Answer 2

substance that has been engineered to take a form (alone or complex system) which is used, by control of interactions with components of living systems, to direct the course of any therapeutic, diagnostic or preventive procedure.

Question 3

3 parts of a tooth implant. Why is their connection critical ?

Answer 3

screw-type implant, abutment, crown.
Because they need to withstand very high loads.

Question 4

What are the alternative to implants ?

Answer 4

Bridge: good aesthetic but grind down 2 healthy teeth.
Partial prosthesis : easy cleaning but interferance with eating and speaking.
Prosthesis : doesn’t wobble and can be removed for cleaning

Question 5

What are the 2 different surface topographies on an implant ?

Answer 5

Rough part : contact with bone (hard tissue)
Smooth part : contact with soft tissue -> good adherance seals the implant from the oral cavity and shields from bacteria

Question 6

What is one of the most imporant things in implant design ?

Answer 6

Surface chemistry ! We can alter it depending on if we want interaction with cells and bone / tissue growth.
It impacts protein adsorption !

Question 7

2 ways of measuring contact angle

Answer 7

static measurement for flat surface, dynamic measurement for a vertical object

Question 8

Which surface adsorbs more protein ?

Answer 8

hydrophilic -> thus more cells grow on it

Question 9

What are the 3 aspects to consider for clinical success ?

Answer 9

• surface topography
• surface chemistry
• mechanical properties