Dentin Notes Flashcards
Other names of 3ry dentin
Irregular Secondary, reparative and
reactionary dentin
Tubules are fewer in number, less
regular in arrangement or irregularly twisted .
Tubular tertary dentin
Other names for sclerotic dentin
Translucent or transparent
Dentinogenesis imperfecta( cause)
Autosomal mutation
in DSPP gene.
• It affects all teeth of both
dentitions.
Color of tooth in it
May be : normal or gray, yellowish brown ,purplish translucent
Shape of tooth (crown-root)
Crown: anormal bulbous.
Neck: constricted (tulip shape)
Root : narrow constricted *tooth motility)
Enamel of it
Normal ,liable to fracture.due to smooth ADJ
Dentine of it
Hard glassy app ,due to sclerosis ,no sensitivity, rapid attrition
Pulp of it (exposure- pulp chamber)
*exposure is very rare except in case
of shell teeth
*pulp chamber is reduced
in size or completely obliterated
Few cases have large pulp
chamber seen mainly in deciduous teeth
Shhell teeth
Shell teeth present mainly in …
.
Decedous teeth
Dentinal tubules of it(s shape - odontoblast -Adj)
:
• The normal s-shape of DTs is disturbed
(irregular with wider diameter , sclerosed or
even absent)
• Entrapped odontoblasts may be seen.
• Relatively straight ADJ.
Treatment:
• Aims to restore and prevent further to
Severe attrition we make …..
Over denture
.
• The most likely source of calcium salts is the
Sclerotic dentin……..
fluid of dentinal lymph
Site of sclerotic dentin
(at root apex or in crown midway between
ADJ and Pulp space).
