introduction to dental crowns

Question 1

what type of restorations are indicated in anterior teeth if :
>30%
30-50%
>50%
of the tooth structure is destroyed?

Answer 1

> 30%:direct restoration
30-50%: veneer
50%: crown

Question 2

how is severe amelogenesis treated

Answer 2

crowns on all affected dentition. if the amelogenesis is slight then veneers can be used. not in severe cases though because veneers can only attach to enamel

Question 3

what severity of diastema can be treated with restorative treatment ?

Answer 3

diastema less than 3mm

Question 4

what’s the crown part of the bridge called?

Answer 4

retainer

Question 5

temporary crown:

Answer 5

-metal with acrylic
-resin crown

Question 6

3/4th crown is used in which teeth and for what purpose?

Answer 6

maxillary premolar

reverse in mandibular premolar

Question 7

7/8 crown is used on what tooth?

Answer 7

maxillary molar –> leaves mesiobuccal cusp intact nut covers the rest

Question 8

how are full coverage crowns retained?

Answer 8

by frictional resistance

Question 9

radicular retention is derived from the_____

Answer 9

root canal