QUESTIONS AND CORRECT ANSWERS (DETAILED
ANSWERS)
Mandibular Incisors- labial - ANSWER: Incisal angles-sharp mesial and distal
incisal angles
Incisal ridge is straight
Mesial and distal sides taper evenly from contact area to narrow cervix
4. Labial face-smooth with a flattened incisal third. Middle third is more convex
Mandibular Incisors- Lingual - ANSWER: Lingual surface is smooth
Lingual fossa-found between marginal ridges above cingulum or at incisal third
Cingulum is evident
No other tooth in the mouth, except the mandibular lateral incisor, show so few
developmental lines and groves
Mandibular Incisors- Mesial - ANSWER: Lingual outline-concave above cingulum
Cervical line-curves incisally-less than on mesial
Cervical line-marked, curved incisally
4. Mesial surface of the crown is convex and smooth at incisal one-third and then
flattens
Mandibular Incisors- Distal - ANSWER: Cervical line-curves incisally-less than on
mesial
Distal surface is similar to the mesial surfaces
Mandibular Incisors- Incisal - ANSWER: Incisal edge-almost at right angle to line
bisecting crown labio-lingually
2. Labial surface-see more than lingual surface
, Mand lateral incisors- labial - ANSWER: Tooth is asymmetrical-right side (M) does not
match the left (D) side of lateral
Lateral incisor is somewhat larger than the mandibular central (exact opposite of
maxillary incisors)
Mesial side is somewhat longer than the distal side-slopes downwards somewhat
Incisal ridge-slopes downward in a distal direction
Crown is somewhat longer than mandibular central incisor
Mesial Surface and Distal Surface
Mand Lateral incisors- lingual - ANSWER: Lingual form-poorly formed
Cingulum-off centered toward distal
Mand Lateral incisors- incisal - ANSWER: 1. Incisal edge-is not at approximate right
angle to a line bisecting the crown labiolingually.
Max canine- labial - ANSWER: Crown is narrower mesiodistally than maxillary central
incisor (the mandibular
canine more so than the maxillary canine)
Cusp tip is in a line with the center of the root
Mesial and distal cusp ridge-mesial cusp is shorter
Shallow depressions-mesially and distally (dives labial lobes)
Of the labial lobes, the middle labial lobe is more developed
Developed Ridge runs from tip of cusp to cervical line
7. Mesial half of the crown resembles a portion of an incisor whereas the distal half
resembles a portion of a premolar
Max canine- lingual - ANSWER: 1. Cingulum is better developed than maxillary
central
2. Marginal ridges are strongly developed
3. Lingual ridge extends to point near the Cingulum
Mesial and Distal lingual fossae located between marginal ridges and lingual ridge