Which Restoration Where

Question 1

What are 4 disadvantages of glass ionomer

Answer 1

Low fracture resistance so cannot be used for incisal edges and large cores
Dehydrates so limited use in xerostomia
Solubility limits use in acid environments - erosion
Limited aesthetics due to poor translucency

Question 2

What are 5 recommended uses for glass ionomer

Answer 2

Restorations where non load bearing and limited aesthetic requirements
Temporary dressings
Cores where supported by adequate tooth structure
Linings
Cementing crowns and bridges

Question 3

What are 3 advantages of gold

Answer 3

Wear rate is very similar to tooth structure
Strong so can be used in thin section to protect remaining tooth structure
Can be used to restore the occlusal anatomy predictably

Question 4

How do materials function considering rebuilding occlusion forces

Answer 4

Indirect materials lab made are easier to control the occlusion
Amalgam and composite wear too fast and GIC is too weak
Procelain tends to crack and wear the opposing teeth
Gold/alloy is the best functionally but poorest aesthetically

Question 5

What are 3 advantages of ceramics

Answer 5

Excellent aesthetics
Glazing produces very smooth surface reducing plaque build up
Good where large portions of the coronal tooth structure needs rebuilding as can be shaped to correct occlusal form more easily than direct restorations