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Dental Anatomy Lecture: Permanent Incisors

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Dental Anatomy Lecture: Permanent Incisors

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Questions and Answers

Which characteristic feature is not associated with the incisor's crown?

Presence of mamelons

Incisal ridge and edge

Well marked marginal ridges (correct)

Lingual fossa

What is the major function of the incisors?

To aid in phonetics

To grind food during mastication (correct)

To maintain a desirable esthetic appearance

To support the lips

What is the principal identifying feature of the permanent maxillary central incisor?

Multiple tapered roots

Rounded distal outline

Square or rectangular appearance (correct)

Convex mesial outline

What is the term used when an angle is formed by the occlusal wear which creates flattened surface linguo-incisally?

Incisal edge Signup and view all the answers

What makes up the complete incisal portion of the crown?

Incisal ridge Signup and view all the answers

Which aspect of the permanent maxillary central incisor has a crest of curvature near the mesio-incisal angle?

Labial aspect Signup and view all the answers

What is the shape of the crown when viewed from the mesial aspect?

Triangular Signup and view all the answers

What is the feature of newly erupted teeth that wears off with age?

Mamelons Signup and view all the answers

Where is the crest of curvature located on the distal outline of the crown?

At the junction between incisal and middle thirds Signup and view all the answers

What is the shape of the root when viewed in cross-section?

Triangular Signup and view all the answers

What is the direction of curvature of the cervical outline of the crown?

Curves incisally Signup and view all the answers

What is found below the cervical line on the lingual aspect of the crown?

"Cingulum" Signup and view all the answers

How does the lingual outline of the crown change from the cingulum to the incisal ridge?

Convex to concave to slightly convex Signup and view all the answers

Which part of the tooth tapers lingually?

"Lingual part" Signup and view all the answers

Where is the incisal edge centered on the labial aspect?

"Over the root" Signup and view all the answers

How does the mesio-distal dimension compare between labial and lingual surfaces?

"Greater labially" Signup and view all the answers