types of dentine Flashcards
1
Q
name the 5 types of dentine?
A
- peritubular dentine
- interglobular dentine
- secondary dentine
- sclerotic/translucent dentine
- reparative dentine
2
Q
what is peritubular dentine like and where is it found?
A
- highly mineralised
- found within each dentine tubule
- increases with age reducing the diameter of the tubule
3
Q
what is interglobular dentine like?
A
area of unmineralised dentine
4
Q
when is secondary dentine formed?
A
gradually throughout age it is slowly formed
5
Q
where is secondary dentine laid down?
A
at pulpal end of primary dentine
6
Q
what does secondary dentine do to the pulp chamber?
A
makes it smaller with age
7
Q
what is sclerotic/translucent dentine?
A
- tubules can be totally obliterated with age giving a translucent apperance
8
Q
name a type of irregular secondary dentine
A
reparative dentine
9
Q
3 examples of when reparative dentine will be laid down?
A
- caries
- excessive wear
- cavity prep
10
Q
severe stimulus will cause what to happen?
A
dead tract/empty tubule due to necrosis of the tubule following odontoblast destruction
11
Q
what can be the difficulty about sclerotic dentine?
A
fear that root will break during extraction
