Maxillary Central Incisors Flashcards
When do the mx central incisors….
calcify
erupt
root complete
calcify- begins around 3 months
erupt- 7-8yrs old
root completion- 10 years old (3 years after eruption)
The general from of the mx central incisors is ________ from the facial and lingual view, and _______ from the proximal and incisal view.
trapezoidal; triangular
Which teeth are the widest mesiodistally of all anterior teeth?
Maxillary central incisors
True or False: The central incisors mesial contacts touch each other, and the distal contact touches the lateral incisor
True
FACIAL VIEW: the crown is longer ______, shorter ________.
incisally; cervically
FACIAL VIEW: the crown is _______ than it is ______.
longer; wide
FACIAL VIEW: Where is the height of contour?
cervical 1/3rd
FACIAL VIEW: where is the mesial proximal contact?
incisal 1/3rd
FACIAL VIEW: Where is the distal proximal contact?
junctions of incisal 1/3rd and middle 1/3rd
Which incisal angle is more sharp on mx central incisors, mesial or distal?
Mesial; distal is more rounded
Describe the mesial and distal outlines of mx central incisors
mesial- almost straight
distal- more convex or rounded
Wear occurs on which surface of mx central incisors?
lingual
LINGUAL VIEW: what are the 4 borders of the lingual fossa?
-cingulum
-mesial marginal ridge (MMR)
-distal marginal ridge (DMR)
-incisal edge
LINGUAL VIEW: where is the height of contour?
cervical 1/3rd
LINGUAL VIEW: the cingulum, located in the cervical 3rd, represents which development lobe?
lingual development lobe
LINGUAL VIEW: is the MMR straight or curved?
nearly straight
LINGUAL VIEW: is the DMR straight or curved?
curved (convexity)
LINGUAL VIEW: is a lingual pit present on mx central incisors?
sometimes seen between fossa and cingulum
MORE OFTEN SEEN AND ASSOCIATED WITH MX LATERAL INCIORS
MESIAL/DISTAL VIEW: the long axis of the tooth bisects through the _______ _____of the tooth.
incisal edge
MESIAL/DISTAL VIEW: where is the height of contour?
cervical 1/3rd for both facial and lingual
MESIAL/DISTAL VIEW: which contour is more convex (rounded), mesial or distal?
distal
MESIAL/DISTAL VIEW: the cervical curvature is greater on the ______ than any other tooth in the mouth.
mesial
Mx central incisors have what type of root?
single, conical, relatively straight
Mx central incisor roots slightly incline mesially or distally?
mesially
Describe the length, root canal, and pulp chambers of the mx central incisors
-length 2-3mm greater than the crown
-1 root canal in center of the tooth
-3 pulp horns (mesial, distal, central)
The mx central incisors root is narrower _______ than ________.
lingually; facially
*root is harder to scale from the lingual
