Pits and Fissure caries Flashcards
what is the main reaction of the pulp towards injury
inflammation
what are the histological changes in dentine/pulp due to caries
The pulp initiates the production of tertiary dentine which results in histological changes in dentine as tertiary dentine is produced much faster and has a much more disorganized structure compared to primary and secondary dentine
what is a provisional restoration
a provisional restoration is a fixed prosthesis which is designed to enhance aesthetics, stabilization and/or function for a limited period of time after which it is to be replaced by a definitive prosthesis
why may we use a provisional restoration
Sometimes we use a provisional restoration if we feel we are too close to the pulp then we can use a provisional restoration to allow the pulp to initiate the production of more tertiary dentine meaning that when we come back to remove the remaining caries we are now further away from the pulp
where do we penetrate the enamel
where caries is greatest - central pit
what bur do we use for the initial cut
high speed diamond fissure
what bur do we use to remove dentinal caries
slow speed steel round bur
why do we remove dentinal caries from the periphery and work towards the centre
we do this to ensure that if the pulp is encountered at the base of the lesion there will be a minimum of infected dentine inside the cavity
for glass ionomer, what do we condition cut dentine with
polyacrylic, polyaleic or citric acids
why is it important not to overdry the cavity when washing and drying off the poly acrylic acid
GI absorbs water during the setting reaction so if the tooth surface is left too dry then fluid from the dentinal tubules may be drawn out resulting in post op sensitivity
what do we apply after application of the GIC
resin surface sealant and air thin
what do we remove with a rotary brush and prophylaxis paste at the end
oxygen inhibited surface layer
what is the oxygen inhibited surface layer
When composite is light cured, oxygen in the air causes an interference in the polymerization resulting in the formation of an oxygen inhibition layer on the surface of the composite. The oxygen-inhibited layer is the sticky, resin rich uncured layer that is left on the surface.
what is in prime and bond NT
PENTA UDMA acetone for solvent silica nano filler camphorquinone (more)
What is a dental liner
material that is usually placed in a thin layer over exposed dentine within a cavity preparation
