Maxillary Central Incisors

Question 1

When do the mx central incisors….
calcify
erupt
root complete

Answer 1

calcify- begins around 3 months
erupt- 7-8yrs old
root completion- 10 years old (3 years after eruption)

Question 2

The general from of the mx central incisors is ________ from the facial and lingual view, and _______ from the proximal and incisal view.

Answer 2

trapezoidal; triangular

Question 3

Which teeth are the widest mesiodistally of all anterior teeth?

Answer 3

Maxillary central incisors

Question 4

True or False: The central incisors mesial contacts touch each other, and the distal contact touches the lateral incisor

Answer 4

True

Question 5

FACIAL VIEW: the crown is longer ______, shorter ________.

Answer 5

incisally; cervically

Question 6

FACIAL VIEW: the crown is _______ than it is ______.

Answer 6

longer; wide

Question 7

FACIAL VIEW: Where is the height of contour?

Answer 7

cervical 1/3rd

Question 8

FACIAL VIEW: where is the mesial proximal contact?

Answer 8

incisal 1/3rd

Question 9

FACIAL VIEW: Where is the distal proximal contact?

Answer 9

junctions of incisal 1/3rd and middle 1/3rd

Question 10

Which incisal angle is more sharp on mx central incisors, mesial or distal?

Answer 10

Mesial; distal is more rounded

Question 11

Describe the mesial and distal outlines of mx central incisors

Answer 11

mesial- almost straight
distal- more convex or rounded

Question 12

Wear occurs on which surface of mx central incisors?

Answer 12

lingual

Question 13

LINGUAL VIEW: what are the 4 borders of the lingual fossa?

Answer 13

-cingulum
-mesial marginal ridge (MMR)
-distal marginal ridge (DMR)
-incisal edge

Question 14

LINGUAL VIEW: where is the height of contour?

Answer 14

cervical 1/3rd

Question 15

LINGUAL VIEW: the cingulum, located in the cervical 3rd, represents which development lobe?

Answer 15

lingual development lobe

Question 16

LINGUAL VIEW: is the MMR straight or curved?

Answer 16

nearly straight

Question 17

LINGUAL VIEW: is the DMR straight or curved?

Answer 17

curved (convexity)

Question 18

LINGUAL VIEW: is a lingual pit present on mx central incisors?

Answer 18

sometimes seen between fossa and cingulum
MORE OFTEN SEEN AND ASSOCIATED WITH MX LATERAL INCIORS

Question 19

MESIAL/DISTAL VIEW: the long axis of the tooth bisects through the _______ _____of the tooth.

Answer 19

incisal edge

Question 20

MESIAL/DISTAL VIEW: where is the height of contour?

Answer 20

cervical 1/3rd for both facial and lingual

Question 21

MESIAL/DISTAL VIEW: which contour is more convex (rounded), mesial or distal?

Answer 21

distal

Question 22

MESIAL/DISTAL VIEW: the cervical curvature is greater on the ______ than any other tooth in the mouth.

Answer 22

mesial

Question 23

Mx central incisors have what type of root?

Answer 23

single, conical, relatively straight

Question 24

Mx central incisor roots slightly incline mesially or distally?

Answer 24

mesially

Question 25

Describe the length, root canal, and pulp chambers of the mx central incisors

Answer 25

-length 2-3mm greater than the crown
-1 root canal in center of the tooth
-3 pulp horns (mesial, distal, central)

Question 26

The mx central incisors root is narrower _______ than ________.

Answer 26

lingually; facially
*root is harder to scale from the lingual