Enamel. Dentin and Cementum
Enamel
Pulp
Dentin
Cementum
yellowish white to grayish white
translucent in nature
COLOR of underlying dentin
THICKNESS of enamel
Amount of STAINS in enamel
Inorganic contents: 95% – 98%
Organic contents: 1 – 2%
Water: 4 – 12%
largest structural components
has a head and tail
pain receptors
odontoblastic processes that cross the DEJ into the enamel.
considered as a single tissue with mineralized
dentin compromising the mature end product of cell differentiation and maturation.
YELLOWISH in color
harder than bone but softer than enamel
Inorganic contents- 70%
Organic contents - 20%
Water- 5%
dentin that immediately surrounds the dentinal tubules
more mineralized than intertubular dentin and predentin.
located between the dentinal tubules
less mineralized than peritubular dentin
main body of dentin.
PRIMARY DENTIN
SECONDARY DENTIN
TERTIARY DENTIN
outlines the pulp chamber;
forms the initial shape of the tooth;
formed before root completion.
forms on all internal aspects of the pulp cavity.
Represents the continuing, but much slower, deposition of dentin by the odontoblasts after root formation has been completed.
also referred to as:
REACTIVE,
REPARATIVE or
IRREGULAR SECONDARY DENTIN
outward (exposed) portion of reactive
sclerotic dentin where slow caries has destroyed formerly overlying tooth structure, leaving a hard, darkened cleanable surface.
The most accepted theory of pain transmission
This accounts for pain transmission by the small rapid movement of fluids that occur within the dentinal tubules
CORONAL PULP
RADICULAR PULP
MYELINATED & UNMYELINATED FIBERS,
ARTERIES,
VEINS,
LYMPH CHANNELS,
CONNECTIVE TISSUE CELLS,
INTERCELLULAR SUBSTANCE,
ODONTOBLASTS,
FIBROBLASTS,
MACROPHAGES,
COLLAGEN, &
FINE FIBERS
FORMATIVE
NUTRITIVE
SENSORY
DEFENSIVE
ACELLULAR
CELLULAR