The Permanent Dentition

Question 1

Maxillary Incisors (both centrals and laterals) have…

four points

Answer 1

Straight incisal edge,
Sharp mesio-incisal angle,
Rounded disto-incisal angle,
Mamelons on eruption

Question 2

Maxillary Central Incisor features? (11, 21)

four points

Answer 2

Largest incisor,
Widest anterior tooth,
Straighter incisal edge,
Root is straighter but distally inclined

Question 3

Maxillary Lateral Incisor Features? (12, 22)

four points

Answer 3

Smaller than central incisor,
Incisal edge sloped towards distal,
More likely to have developmental pits on palatal
Well marked marginal ridges on palatal surface that meets a well developed cingulum, usually slightly distally placed

Question 4

Mandibular Incisors (cental and laterals) have?

three points

Answer 4

Smooth convex labial surface,
Straight incisal edge,
Mamelons on eruption

Question 5

Mandibular Central Incisor Features? (31, 41)

three points

Answer 5

Smallest permanent tooth,
Symmetrical,
Slight curvature to the distal

Question 6

Mandibular Lateral Incisor Features? (32, 42)

three points

Answer 6

Slightly larger than 31 &41,
Fan-shaped mesial-distal,
Cingulum is distally placed

Question 7

Maxillary canine features? (13, 23)

three points

Answer 7

Longest tooth,
Distal slope longer than mesial slope,
Long, single root

Question 8

Mandibular Canine Feature? (33, 43)

three points

Answer 8

Less bulky than maxillary canine,
Lingual fossa less pronounced than maxillary canine
Distal incisal slope longer and steeper than mesial incisal

Question 9

Maxillary premolars Features? (14, 15, 24, 25)

four points

Answer 9

Difficult to tell apart looking at crown only,
Buccal and Palatal cusp,
Narrower mesially-distally
Buccal wider than palatal

Question 10

Maxillary First Premolar Features (14, 24)

five points

Answer 10

Buccal cusp higher than palatal cusp,
Roots fused and partially bifurcated,
Crown pentagonal shape (similar to canine),
Mesial marginal ridge fissure/groove,
Mesial margin concave (to fit canine)

Question 11

Maxillary Second Premolar Features? (15, 25)

five points

Answer 11

Buccal and palatal cusps closer in height,
Single rooted,
More rounded from buccal aspect,
Line angles more rounded,
Palatal cusp more central

Question 12

Mandibular premolars Features in common? (34, 35, 44, 45)

four points

Answer 12

Occlusal pits and fissures,
Occlusal surface lingually inclined,
Buccal surface visible from occlusal aspect,
Crown shorter in height than anterior teeth

Question 13

Mandibular First Premolar Features? (34, 44)

three points

Answer 13

Sharp buccal cusp,
Short, non-functioning lingual cusp,
Smaller than second premolar

Question 14

Mandibular Second Premolar Features? (35, 45)

three points

Answer 14

Can have two or three cusps, (1 buccal and 1 or 2 lingual),
Lingual cusp/s well developed,
Can have Y, U or H shaped fissure pattern

Question 15

Difference of appearance between crowns of upper and lower premolars?

Answer 15

Lowers- occlusal surface lingually displaced, buccal surface visible
Uppers- open occlusal view, more elongated in comparison

Question 16

Maxillary 1st Molar Features? (16, 26)

five points

Answer 16

Largest tooth in upper jaw,
5 cusps including cusp of Carabelli (MP),
Oblique ridge on distal aspect of occlusal surface,
Rhomboidal shaped,
Roots more flared

Question 17

Maxillary 2nd Molar Features? (17, 27)

five points

Answer 17

Similar but smaller than 1st molar,
Four cusps,
More heart-shaped,
3 roots, 2 on buccal (MB/DB) and one centrally placed palatal (longest root)
Roots straighter and closer together

Question 18

Mandibular 1st Molar Features (36, 46)

five points

Answer 18

Largest tooth in lower jaw,
5 cusps- 3 buccal (distal smallest) 2 lingual (similar size)
Pentagonal shape
four-five pits, mes-occ, mid-occ, dist-occ, one or two buccal
two roots, mesial and distal

Question 19

Mandibular 2nd Molar Features? (37, 47)

three points

Answer 19

Smaller than 1st molar,
4 cusps, 2 buccal, 2 lingual,
More symmetrical and rectangle shaped