10 Questions
What is the geometric outline of the lingual surface of teeth?
Trapezoid but narrower
How would you describe the mesial outline of the lingual surface of teeth?
More convex
Where is the mesial contact area located on the lingual surface of teeth?
More cervical than central
How would you describe the mesio-incisal angle on the lingual surface of teeth?
Sharp
What feature may be present at the cervical end of the lingual fossa on the lingual surface of teeth?
Lingual fault pit
What is the distinguishing feature of the mesial outline on the lingual surface of teeth?
More convex
Where is the distal contact area located on the lingual surface of teeth?
More cervical than the mesial contact area
Which statement describes the mesio-incisal angle on the lingual surface of teeth?
Sharp
What may be present at the cervical end of the lingual fossa on the lingual surface of teeth?
Lingual fault pit
How would you describe the geometric outline of the lingual surface of teeth?
Trapezoid but narrower
Study Notes
Labial Surface
- Upper Central Incisor:
- Geometrical outline: Trapezoid
- Mesial outline: slightly convex
- Distal outline: more convex
- Mesial contact area: near the mesioincisal angle
- Disto-incisal angle: sharp
- Cervical ridge: located at cervical third
- Labial developmental grooves: mesial and distal
- Upper Lateral Incisor:
- Geometrical outline: Trapezoid, but narrower
- Mesial outline: more convex
- Distal outline: even more convex
- Mesial contact area: at the junction of the incisal and middle thirds (more cervical than central)
- Disto-incisal angle: rounded
- Cervical ridge: located at cervical third
- Labial developmental grooves: mesial and distal
Root Structure
- Upper Central Incisor:
- Single, cone-shaped root
- Root tapers evenly to apical 1/3, then curves distally with a pointed apex
- Upper Lateral Incisor:
- Same as Upper Central Incisor
Lingual Surface
- Dental arch: horse-shoe shaped
- Outer surface: larger than the inner one
- Lingual convergence: due to the shape of the dental arch
Test your knowledge of dental anatomy with this quiz focusing on the geometrical outlines of upper central and lateral incisors. Identify the differences in mesial and distal outlines and contact areas.
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