PERMANENT ANTERIOR TOOTH MORPHOLOGY - Maxillary incisors Flashcards
Name developmental lobes A-D
What is the lingual/palatal lobe called?
cingulum
How many developmental lobes are there?
4
3 Labial lobes
1 Lingual/palatal lobe (cingulum)
What are the anterior secondary teeth called?
all succedaneus
(replace primary teeth)
How many roots do the anterior teeth have?
1
How would you describe the shape of the mesial/distal view of anterior teeth?
triangular
How would you describe the shape of the labial/palatal view of anterior teeth?
trapezoidal
What is the interproximal view?
side on
mesial/distal view
What letter represents the palatal developmental lobe of the anterior teeth?
A = CINGULUM
Name structures B and C (palatal surface)
A = mesial marginal ridge
B = distal marginal ridge
What are the largest mesial/distal incisor teeth ?
the maxillary 1s
When do maxillary central incisors erupt?
7-8 years
What do you call the grooves highlighted here? (maxillary central incisor)
developmental depressions
Name structures A-C (central maxillary incisal)
A = distal labial lobe
B = middle labial lobe
C = mesial labial lobe
Name structures A and B (maxillary central incisal)
A = disto-incisal angle
B = mesio-incisal angle
Where is the imbrication line of the central incisal maxillary teeth?
groove, where the anatomical crown moves towards the root of the tooth
Name structure A
PALATAL FOSSA
What is the role of the palatal fossa?
guide food towards back of the mouth
What can form in the palatal fossa?
palatal groove
palatal pit
What tooth is shown here?
maxillary central incisors
What is characteristic of the maxillary central incisal mesial surface?
deep CEJ curvature
Where is the mesial contact point in the maxillary central incisors?
in the incisal 1/3 of the crown
bottom arrow
Where is the distal contact point in the maxillary central incisors?
junction of the incisal and middle 1/3
What is the long axis of a tooth?
crown to root tip
What is the orientation of the maxillary central incisor?
Incisal edge is labial to long axis.
What does the incisal edge being labial to long axis mean?
the incisors protrude out form the long axis to towards the labial surface
Describe the features of the maxillary central incisor shown here
Incisal edge is labial to long axis.
Longer mesial marginal ridge (brown).
Distally displaced cingulum (red)
Labio-incisal edge (arrow)
Incisal ridge (blue)
When do the maxillary lateral incisors erupt?
8 and 9
How does the lateral incisor differ from the central incisor?
Resembles the central incisor in all views but the crown is smaller and more rounded.
In the lateral incisal teeth, which is sharper. the disto-incisal angle or the mesio-incisal angle?
mesio-incisal angle
Do the lateral or central incisors have a deeper palatal fossa?
maxillary lateral incisors
How does the cingulum differ between the lateral and central incisors?
the lateral incisor is cingulum is narrower
Do the lateral or central incisors have more chance of palatal pits forming?
the lateral incisors
form grooves and risks of caries
What is a palatogingival groove?
They originate in the lingual pit and extend cervically towards gingiva. More common on the lateral incisor
may extend onto root surface
Where does the palatogingival groove usually originate?
the palatal pit
Compare the maxillary lateral and central incisors from a proximal point of view?
The same
MAXILLARY LATERAL INCISORS SHOWN
Describe the labial surface of the lateral incisor
more rounded labial surface than 1s
Compare the lateral and central incisor’s cingulum distally
central - displaced
lateral - central (due to narrower surface)
Name structures A-G of the maxillary lateral incisors
