Caries and Root Fractures Flashcards
Are caries gram positive or negative?
Gram Positive
What kind of acid does bacteria produce?
Lactic acid
What do we call the initial carious lesion?
An incipient lesion
What predisposing factors promote caries development?
Retentive shape of teeth
Crowded teeth
Teeth defects
What is the critical pH for enamel dissolution?
5.3 - 5.5
What are classic features observed in a carious lesion?
Colour change
Loss of hard tissue
Stickiness to explorer tip
Class I lesion
Occlusal surface/pits
Class II lesion
Interprox of posterior teeth
Class III lesion
Interprox of anterior teeth
Class IV Lesion
Interprox including the incisal edge (anterior teeth)
Class V Lesion
Gingival margin/cervical third
Class VI lesion
Incisal edge/cusp tips of posterior teeth
Caries that appear black or dark brown are…
Arrested caries
Which bacteria initiates dental caries?
Steptococcus mutans
Which bacteria progresses dental caries?
Lactobacilli
What is the best predictor of future caries?
The past history of dental caries
Caries in smooth surfaces progress _______ that proximal surfaces or in fissures
slower
Where is the best place to look for caries on a radiograph?
Under the contacts
What is radiographic burnout?
A radiolucency along the gumline, not carious
What is the most accurate method of detecting interproximal caries?
Radiographs
What is Hyperemia?
Reversible inflammation of the pulp
Sharp pain - 30-60 seconds
No radiographic changes
What is chronic pulpitis?
Irreversible
Slow, gradual degeneration of nerve tissue
Root canal/extraction needed
What is internal resorption?
Destruction of tooth structure that is initiated from within the pulp chamber or root canal
Tooth will appear ‘pinkish’
What is external resorption?
Destruction of tooth structure that is initiated from the outside the tooth
