tooth morphology revision

Question 1

describe the first maxillary central incisor

Answer 1

labially it has a smooth surface and is usually slightly convex.
mesio-incisal angle is sharp and the disto-incisal angle more rounded
lingual surface is concave with mesial and distal marginal ridges which meet at the neck (cervix) of the tooth forming a convex cingulum
viewed mesially or distally, the crown appears wedge-shaped and leans lingually.
cervical region undulates on the mesial and distal sides of the tooth, the mesial undulation being greater than the distal

Question 2

how many roots does the first maxillary central incisor have

Answer 2

1 root- roughly triangular with rounded angles

Question 3

how many cornua are in the first maxillary central incisor

Answer 3

2 pulp horns - one messiah one distal

Question 4

what is the initial calcification of the first maxillary central incisor

Answer 4

3-4 months

Question 5

what is the crown completion of the first maxillary central incisor

Answer 5

4-5 years

Question 6

what is the root formation of the first maxillary central incisor

Answer 6

10 years

Question 7

describe the second maxillary lateral incisor

Answer 7

labial outline is not as rectangular as that of the central incisor, the lateral being a much less bulky and more slender tooth
a sharp mesio-incisal angle and a short distal surface with a pronounced rounding of the disto-incisal angle
crown appears wedge-shaped when viewed mesially or distally.
Lingual surface has two pronounced marginal ridges. Sometimes, where the ridges meet at the cervix, they enclose a depression or fossa. As with the central incisor the cervical undulation is greater on the mesial surface.

Question 8

how many roots does UR2/UL2 have

Answer 8

1 root- roughly triangular although more flattened
2 pulp horns - one mesial and one distal
the distal groove is more prominent than the mesial.

Question 9

what is the initial calcification of the UR2/UL2

Answer 9

10-12 months

Question 10

what is is the crown completion of the UR2/UL2

Answer 10

4-5 YEARS

Question 11

What is the root completion of the UR2/UL2

Answer 11

11 years

Question 12

describe the UR3/UL3

Answer 12

crown comes to a point or cusp at the incisal surface
abial surface is convex and has a mesial slope and a distal slope, the distal slope being the longer of the two.
distal surface is also more bulbous than the mesial surface
has marginal ridges, a large cingulum and a mesial and distal fossa, the DISTAL FOSSA being the deeper of the two
Cervical undulation is greater on the mesial surface.

Question 13

how many roots does the UR3/UL3 HAVE

Answer 13

one tapering root
one root canal
one pulp horn

Question 14

what is the initial calcification of UR3/UL3

Answer 14

4-5 month

Question 15

what is the crown completion of the UR3/UL3

Answer 15

5.5- 6.5 years

Question 16

what is the root completion of the UR3/UL3

Answer 16

13-15 YEARS