Day 2 Lecture 1 Flashcards
Caries
A multifacorial infectious disease that attacks teeth by certain bacteria if the conditions are permissible causing destruction (demineralization/ dissolution) of the tooth - bacteria are part of microflora. When other factors line up, you get caries. Mutens and… other primary bacteria (60+). Substrate is carbohydrates - used as food, pH of mouth also has a role.
Demineralization
Dissolving of the tooth. Collagen fibers (small amount - tooth is mostly calcium phosphate*) small amount of organic matter is broken down, Calcium phosphate demineralizes.
Remineralization
Opposite of demineralization. If remineralization exceeds demineralization, you’re good and no operation is needed. Enough flourides in saliva to where flourohydroxyapatite can form.
Caries classification
Stages: Incipient (reversible), small (operative 1), moderate, extensive.
incipient
No operation, still in enamel, not yet to DEJ.
Small
Operative 1. Caries has gone along enamel, has gotten to DEJ
Moderate
Has gone into enamel, spread in dentin.
Extensive
Deep enough caries to the point that the dentin has grown down to stop the caries from reaching the pulp.
Pit and fissure carries
pits and fissures on the occlusal surfaces of posterior teeth, buccal and lingual surfaces of molars, lingual surfaces of maxillary anterior teeth. On buccal surface of mandibular molars, lingual surface of maxillary molars, on cingulum of central and lateral incisors.
Smooth surface caries
on the surfaces that are “pit and fissure free.” Mainly on proximal surfaces, buccal surfaces of premolars.
Root surface caries
more in elderly, follows an advanced gingival recession.
Caries classification
Rate - active and arrested
Active
Rampant (acute) decay and chronic decay.
Rampant
Rapidly invading, softer lesions. Very smooth and mushy, usually due to something. Nursing bottles caries, radiaiton caries, meth mouth.
Chronic
slow, long standing, dark in color and so there is a good chance of remineralization in early stages (reverse the demineralization process)
Arrested
Not showing any further progression.
• Smooth and polished like surface
Recurrent/Secondary caries
Caries under preexisting faulty restoration.
Black’s classification of caries
Class I-Class VI - each class has a different cavity prep.
Class I
Pits and fissures of occlusal surfaces of premolars/molars, buccal or lingual pits/fissures of the molars, lingual pit near the cingulum of the maxillary incisors.
Class II
Involving proximal surfaces (mesial and distal) of premolars and molars.
Class III
Proximal (mesial and distal) surfaces of incisors and canines.