Card Set Information
Dentin and pulp
what is the dentin-pulp complex?
unexposed inner portion of tooth that come from undifferentiated mesenchymal cells
What is the composition of dentin and pulp?
70% inorganic material
20% organic material
what portion makes up the bulk of the tooth?
dentin made up of smaller crystals than enamel
true or false. dentin is avascular
what is the main function of the dentin?
protects the pulp
what is the initial material laid down by the odontoblasts?
process of dentin matrix formation
what stages occur in the apposition of dentin?
predentin formation by odontoblasts
what are the two stages of maturation of dentin?
long tube in dentin-extends from DEJ into pulp. this is allows sense to come from the surface of the tooth into the pulp
what is contained in the dentinal tubules?
dentinal fluid, odontoblastic process, and afferent (sensory) axon
name and describe the 7 different types of dentin:
: wall of tubules, highly calcified
: between the tubules, highly calcified
: outermost layer, first dentin formed
: layer around outer pulpal wall, formed after mantle dentin
: formed befoer completion of aical foramen, formed more rapidly and more mineralized
: formed after completion of apical foramen, formed slower and is less mineralized than primary
: formed as a result of injury
what is the main functions of the pulp?
support and maintain formation of dentin
nutritional supply to tooth
protective to tooth by reacting with inflammatory and immune responses when something goes wrong
what are accessory canals? and how do they form?
extra canals usually on the lateral portions of the roots of some teeth
form when hertwig's sheath encounters a blood vessel during root formation. the root structure than forms around the vessel
the largest group of cells in the pulp
2nd largest group of cells in the pulp, only the cell bodys of these exist in the pulp
odontoblasts (with no odontoblastic process)