PA EFDA Exam Prep Questions and Answers
1. Cingulum: a bulge or prominence of enamel found on the cervical third of the lingual surface of an anterior tooth.
2. Cusp: a major developmental convexity on or near the occlusal surface of a posterior tooth.
3. Cusp: Found on the incisal edges o...
1. Cingulum: a bulge or prominence of enamel found on the cervical third of the lingual surface
of an anterior tooth.
2. Cusp: a major developmental convexity on or near the occlusal surface of a posterior tooth.
3. Cusp: Found on the incisal edges of canines,
4. Cusp: a premolar usually has two of these on the buccal and lingual sur- faces.Mandibular
second premolar may sometimes have three of these.
5. Cusp Of Carabelli: Only found on the maxillary first molars
6. Cusp of Carabelli: only found on tooth #3 and #14
7. Cusp of Carabelli: The fifth cusp, located on the mesial-lingual surface of many maxillary first
molars.
8. Cusp: Maxillary first and second molars and mandibular second molars usually have four of
these
9. Fossa: irregular depressions or concavities on the surface of anterior and posterior teeth
10. :
11. Central Fossa: the depression or concavity found in the central portion of the occlusal
surface of molars
12. Ridge: The linear elevation on the surface of a tooth.
,13. Marginal Ridge: The rounded boarder of enamel that forms the mesial and distal boundaries
of the occlusal surface of molars and premolars
14. Marginal Ridge: the mesial and distal boundaries of the lingual surfaces of incisors and
cuspids.
15. Triangular Ridge: a ridge on a molar or premolar that descends from the tips of the cusp
towards the central part of the occlusal surface.
16. Transverse Ridge: the ridge formed by two triangular ridges that extend across the surface of
posterior teeth.
17. Oblique Ridge: Ridge crossing the occlusal surface of only maxillary molars in an oblique
direction
18. How many major fossa's are there: 4 lingual Fossa
Central Fossa
Mesial and Distal triangular fossa
,19. Lingual Fossa: depression or concavity found on the lingual surface of mandibular and
maxillary incisors located between the mesial and distal marginal ridges
20. Triangular Fossa: located on the occlusal surface of the molars and premolars distal to the
mesial marginal ridge and mesial to the distal marginal ridge
21. Triangular Fossa: are always bordered by three developmental ridges one of which is the
marginal ridge named according by there location
22. Developmental Grooves: major grooves or lines between the ridges of a tooth named according
to there location
23. Supplemental groove: grooves that are less distinct, shallow linear depres- sion on the
surface of teeth and are supplemental to developmental grooves , do not mark he junction on
primary parts of a tooth
24. Spillway: a shallow depression adjacent to a developmental groove located on the occlusal
surface of posterior teeth, originating in the mesial and distal triangular fossa,and extending over the
mesial and distal marginal ridges towards the buccal and lingual embrasure areas
25. Spillway: provides an escape for food from the occlusal surface during the mastication
process
26. Pit: a small pin point depression located at the junction of developmental grooves at the
termination of those grooves.
27. Fissure: developmental or supplemental grooves with incomplete closure of enamel an
explorer may catch or stick because the incomplete closure of the enamel
28. Wall: a vertical or horizontal surface within cavity preparation named for the surfaces toward
which it faces or for a structure it approximates
, 29. Cavosurface: the uncut tooth structure adjacent to the cavity preparation.
30. Line angle: A line formed along the junction of two walls or of one wall and the cavosurface
margin and named according to the walls and services involved
31. Point angle: A point formed by the junction of three walls within a cavity preparation and
named according to the three Walls involved
32. Retentive features: Retentive features Grooves pits or prepared areas in the Dentin along the
line angles or point angles of the preparation to enhance the mechanical retention of the
restorative materials and named according to their location
33. Mamelons: Three bulges on the inside so edge of the newly irrupt it essential incisor which
usually disappear from attrition
34. Cingulum: A convex area on the lingual surface of anterior teeth near the gingiva
35. Furcation: The dividing point of a multi rooted tooth
36. Mesial: The surface towards the midline
37. Distal: The surface away from the midline
38. Labial: The outside surface which is towards the lips
39. Lingual: The inside surface which is toward the tongue
40. Palatal: On the maxillary arch towards the palate
41. Buccal: The outside surface which is towards the cheek
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