16 Questions
Which characteristic feature is not associated with the incisor's crown?
Well marked marginal ridges
What is the major function of the incisors?
To grind food during mastication
What is the principal identifying feature of the permanent maxillary central incisor?
Square or rectangular appearance
What is the term used when an angle is formed by the occlusal wear which creates flattened surface linguo-incisally?
Incisal edge
What makes up the complete incisal portion of the crown?
Incisal ridge
Which aspect of the permanent maxillary central incisor has a crest of curvature near the mesio-incisal angle?
Labial aspect
What is the shape of the crown when viewed from the mesial aspect?
Triangular
What is the feature of newly erupted teeth that wears off with age?
Mamelons
Where is the crest of curvature located on the distal outline of the crown?
At the junction between incisal and middle thirds
What is the shape of the root when viewed in cross-section?
Triangular
What is the direction of curvature of the cervical outline of the crown?
Curves incisally
What is found below the cervical line on the lingual aspect of the crown?
"Cingulum"
How does the lingual outline of the crown change from the cingulum to the incisal ridge?
Convex to concave to slightly convex
Which part of the tooth tapers lingually?
"Lingual part"
Where is the incisal edge centered on the labial aspect?
"Over the root"
How does the mesio-distal dimension compare between labial and lingual surfaces?
"Greater labially"
Learn about the characteristics and functions of permanent incisors in dental anatomy. Understand their role in cutting food during mastication, supporting lips, maintaining esthetic appearance, and influencing phonetics.
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