Incisors Flashcards
What is a cingulum?
- The bulge or prominence of enamel found on the cervical third of the lingual surface of all anterior teeth
What are marginal ridges?
- An elevation of enamel which forms the mesial or distal margin of the lingual surface of an anterior tooth or the occlusal surface of a posterior tooth
How large is the crown of an upper central incisor compared to an upper lateral incisor?
Larger than lateral incisors
What is the mesio-incisal angle like on an upper central incisor?
- Sharp
What is the disto-incisal angle like on an upper central incisor?
- More rounded
What is the lingual surface of an upper central incisor like?
- Concave with mesial and distal marginal ridges which meet at the neck of the tooth forming a convex cingulum
What are mammelons?
Cusplets found on the incisal surface of incisors
What type of teeth are mammelons more likely to be fond?
Deciduous teeth
What way does the crown of a n upper central incisor lean?
- Leans lingually
On what side of the upper central incisor does the cervical region have greater undulation?
The mesial side
What is the shape of an upper lateral incisor like compared to an upper central incisor?
Not as rectangular
- Much less bulky and more slender
- The cervical region is narrowed mesio-distally, giving it a long mesial surface
What is the mesio-incisal angle like in an upper lateral incisor?
- Slightly rounded
What is the disto-incisal angle like in an upper lateral incisor?
- Short distal surface with a pronounced rounding of the angle
What can the lingual side of an upper lateral incisor contain which is a pronounced area for caries to form?
An enclosed depression or fossa
On what side of the upper lateral incisor does the cervical region have greater undulation?
The mesial side
What is the crown of a lower central incisor like?
- Appears flat and almost symmetrical
Which incisal angle is marginally rounder in a lower central incisor?
- The disto-incisal angle
What does the crown of a lower central incisor look like from a mesio or distal aspect?
Appears wedge-shaped and leans lingually
On what side of the lower central incisor is there greater undulation?
The mesial surface
Does the lower central incisor have marginal ridges and a cingulum?
Yes, has faint marginal ridges and a small cingulum
What does the crown of a lower lateral incisor look like?
- Fan-shaped
What are the incisal angles of the lower lateral incisor like?
- Mesio-incisal angle is sharp and the disto-incisal angle is rounded
What does the crown of a lower lateral incisor look like from a mesial or distal point of view?
- Crown is wedge-shaped and leans lingually
On what side of the lower lateral incisor is there greater undulation?
The mesial surface
What does the lower lateral incisor look like when viewed from the incisal edge?
- The crown is slightly twisted on the root to follow the dental arch
What is the name for a dwarfed lateral incisor?
Peg laterals
