cariology IV

Question 1

smooth surface caries

Answer 1

1) on a surface free of pits and fissures, not in contact with other tooth
2) class II lesions with no adjacent tooth
3) class V carious lesions
4) surfaces are cleansable, may be partially self-cleansing

Question 2

class V

Answer 2

between the height of contour and CEJ
1) no naturally cleaned by cheek, lip, and tongue movement
2) if brushing is ineffective, the white spot lesion, then frank caries development
3) would antimicrobial rinse help? no
fluoride? yes

Question 3

location

Answer 3

1) smooth enamel surfaces
- exposed oral environment
- adjacent to gingival crest (which limits self-cleansing)
- caries does not develop below the gums
2) spanning the CEJ
- some gingival recession (physiologically or pathological)
- begins on root surface
3) root caries
- needs gum recession
- can occur circumferentially

Question 4

at CEJ

Answer 4

1) usually starts in dentin once cementum is lost
2) exposed root surfaces
3) visible through enamel
4) undermine thin enamelr

Question 5

root surface caries

Answer 5

1) location can be unpredictable (always apical to CEJ)
2) visible
3) clinical lesion
- significant enamel defect?
- cavitated?
4) tactile changes
5) often proximal surfaces
6) may show up on radiographs

Question 6

restoring root caries

Answer 6

1) requires restorations with margins on dentin/cementum has big influence on material choice and reliability
- composite
- glass ionomer
- silver diamine fluoride

Question 7

age related root caries

Answer 7

1) gingival recession
2) salivary changes
- xerostomia
3) declining dexterity
4) progresses fast

Question 8

difficult to control root caries

Answer 8

1) surgically
2) non surgically

Question 9

why is root caries alarming

Answer 9

1) comparatively rapid progression
2) asymptomatic
3) closer to the pulp
4) difficult to restore

Question 10

cementum

Answer 10

1) connective tissue attachment to root depends on this
2) once exposed to oral environment, it is lost
3) think dentin bonding for resin materials

Question 11

class V definition

Answer 11

1) gingival third of facial or lingual surfaces of anterior or posterior teeth

Question 12

non carious cervical lesion

Answer 12

1) attrition
- physically driven (not a cervical lesion though)
2 abrasion
- physically driven
- mechanical or physical forces
3) erosion
- chemically driven
- chemical dissolution
4) abfraction
- loss of tooth structure by occlusal forces

Question 13

carious class V lesion

Answer 13

1) bacterial plaque attaching to tooth surface releases acids
2) usually near gingival crest
- not self-cleansing
3) diffuse demineralization
- exposed margins fade out
- un erupted areas unaffected
4) enamel breakdown at center of lesion, carious dentin underlines enamel
- once through cavitated enamel, will spread to mushroom shape
- spread will be most aggressive along DEJ
- enamel breakdown is accelerated by loss of solid dentin at the DEJ