Pulpal response to injury Flashcards
What is the percentage inorganic content of enamel?
96%
What is the inirganic comtent of cementum?
50-55%
What is the inorganic component of dentine?
70%
How does the initial lesion appear on teeth?
white spot
What are the 4 zones of an enamel lesion?
How do the caries spread when they hit the amelo-dentinal junction?
spread laterally
Describe the inner and outer areas of the lesion?
inner infected area and an outer affected area
What area of caries can be remineralised?
the affected area
when is a pulpal repose initiated?
when the bacteria is within the dentine
what mineralisation does sclerotic dentine have?
hyperminerlised
what dentine is produced in response to injury?
the odontoblasts are responding to the irritation
- by producing sclerotic dentine on the outer side
- newer dentine underneath the side of irritation = tertiary dentine
A = primary
B = secondary (regular)
C = tertiary (reactive)
What happens in the pulp as the infection progresses?
acute inflammation
cells characteristic of the inflammatory response
What is irreversible pulpitis?
extensive pulpal necrosis
What are dead tracts?
empty tubules filled with air
degeneration of odontoblastic processes
