Caries Flashcards
Dental caries require 3 factors to be present which are…….
When they act together over a sufficient period of …….
bacterial plaque (strepmutans)
tooth tissue
fermentable carbohydrate of the diet
time
Dental plaque is a natural …..
biofilm
What is a biofilm
community of microorganisms attached to a solid surface
Caries is a progressive …….. initiated at the …….. ……… that is …….. up until a point
disease
tooth surface
reversible
Definition of caries process
histopathological metabolic interactions happening in the plaque biofilm causing disease
Definition of caries lesion
The signs of disease on a dental hard tissue
e.g. discolouration, early lesions, cavities
4 factors that makes sound enamel
what pH
Oral hygiene saliva fluoride diet High pH
Stephen curve - acid attack Whats is: normal pH critical pH (dentine) critical pH (enamel)
7
- 2
- 5
caries diagnostic regime
remove any plaque -scale/polish
dry tooth with 3 in 1 syringe
diagnostic - decide what treatment
Diagnostic:
What occurs after observation and monitoring
Recall and re-diagnose
Diagnostic:
What occurs after invasive preparation
control of residue caries
Factors of a patient who is at more risk of caries….
social: stress long term breast-feeding medicines salivary: low secretions microbiology: high no of S.mutans and lactobacilli
What colour is a older lesion
brown spot
Composition of dentine
70% inorganic
20% organic
10% water
Main inorganic and organic compound of dentine
hydroxyapatite
collagen
Composition of enamel
97% inorganic
1% organic
2% water
Main inorganic and organic compound of enamel
hydroxyapatite
protein
What does D1, D2, D3 stand for
Outer third of dentine
Middle third of dentine
Inner third of dentine
Clinical signs of D1 and D2
histology
Symptoms
Treatment
white spot lesion, frosty, chalky, roughened surface, arrested brown spot lesion
histology: early subsurface demineralisation
minimal symptoms, slight sensitivity to hot, cold, sugar at EDJ
Treatment - monitor, OHI, fluoride, diet, fissure seal?
Clinical signs of D3
histology
symptoms
treatment
cavitated (open) or non cavitated (closed), discolouration
histology: enamel demineralisation, translucent or tertiary dentine, bacterial penetration
symptoms: acute, reversible pulpitis
Treatment: OHI, fluoride, diet, minimal cavity prep, sealed restoration
Clinical signs of D4 lesion
histology
symptoms
treatment
cavitation, gross discolouration, visible pulp?
histology: gross demineralisation, tubular destruction with pulp exposure
symptoms: irreversible pulpitis, loss of function
Treatment: pulp capping, RCT, complex resorations
