3. Formation of New Dentin
Types of
Dentin
Primary Secondary Tertiary
Reactionary
Reparative
4. Secondary Dentin
• Cause: Aging
• Develops after Root
Formation is completed.
• On entire pulpal surface
• The deposition is continuous
with primary but:
i)slower
ii)Fewer tubules
iii)Tubules change direction
to a more wavy course
• In multi-rooted teeth, it’s
thicker on the roof and floor
of pulp chamber
5.
6. Tertiary Dentin
• Forms at a localized area in reaction
to a stimulus
• Dentinal tubules less in number and
irregular arrangement
• There are 2 types of Tertiary Dentine
16. Innervation of Dentin
• Subodontoplastic
plexus of Raschkow
• The nerve will loose
its mylien sheath
then pass between
the odontoblasts
bodies and enter
the dentinal tubules
24. Endodontics
• With age,
secondary and
tertiary dentin are
formed causing
obliteration to the
pulp chamber and
root canal
• Treatment and
prognosis in older
patients is less
effective
26. Forensic Dentistry
• Dry teeth of
unknown dead
body contain
mitochondrial DNA
of the interatubular
nerve which are
protected within
the tubules could
help in
identification of the
dead body.
