Cavity classes

Question 1

I

Answer 1

Pits and fissures on occlusal surface of molars and premolars
Buccal or lingual pits of molars
Lingual pits of maxillary incisors

Question 2

II

Answer 2

Proximal (mesial or distal) surfaces of premolars and molars involving 2 or more surfaces (MO, DO, MOD, MODB)

Question 3

III

Answer 3

Proximal (mesial or distal) surfaces of incisors and canines (MB, ML, DB, DL)

Question 4

IV

Answer 4

Proximal (mesial or distal) surfaces of incisors and canines also involving the incisal angle (MIB, MIBL, DIB)

Question 5

V

Answer 5

Gingival (cervical) 1/3 of facial/ lingual surfaces of tooth

Question 6

VI

Answer 6

Incisal edge of anterior teeth

Cusp tips of posterior teeth

Question 7

Sites of plaque accumulation

Answer 7

Gingival margins
Interproximal
Fissures

Question 8

Progression of caries

Answer 8

1. Early enamel lesion, non-cavitated, fragile, white-spot
2. Surface cavitation with demineralisation of dentine
3. Bacterial penetration into dentine (infects and affected dentine)

Question 9

Embrasure

Answer 9

V-shaped valleys between adjacent teeth

Question 10

Marginal ridge

Answer 10

Rounded border of tooth that forms part of contact point

Question 11

Design features of cavity

Answer 11

Occlusal lock/ dovetail
Axial grooves or locks for added retention
Floor of cavity/ gingival floor