Root Morphology

The mandibular second premolar MOST closely resembles the mandibular first premolar
a.from the buccal aspect
b.from the occlusal aspect
c.in that both have bifurcated roots
d.in that the lingual cusp is of the same size

Which of the permanent incisors is MOST frequently concave on the lingual surface?
a. maxillary central
b. maxillary lateral
c. mandibular lateral
d. mandibular central

A tooth occasionally exhibits a lingual groove that extends from the enamel onto the cemental area of the root. This is MOST likely to be the permanent
a. maxillary cuspid
b. maxillary third molar
c. maxillary central incisor
d. maxillary lateral incisor
e. mandibular second premolar

The mental foramen is located closest to the
a. mandibular cuspid
b. mandibular second premolar
c. mandibular first molar
d. maxillary first premolar
e. maxillary third molar

In comparison with the mandibular permanent cuspid, the maxillary permanent cuspid in the same mouth
a. has a shorter root
b. is wider mesiodistally
c. is narrower mesiodistally
d. has a less pronounced cingulum

The lingual embrasures are ordinarily larger than the facial embrasures. The reason for this is that
a. most teeth are wider on the lingual side than on the facial side
b. most teeth are narrower on the lingual side than on the facial side and their contact points are located in the facial third of the crowns
c. the contact points are located in the lingual third of the crowns
d. the arch curve is extreme in this region

Which of the following permanent anterior teeth has the greatest crown-root length?
a. mandibular canine
b. maxillary central incisor
c. maxillary lateral incisor
d. mandibular central incisor
e. mandibular lateral incisor

The posterior permanent tooth most likely to have a pronounced concavity on its mesial surface is the
a. maxillary first premolar
b. maxillary second premolar
c. mandibular first molar
d. mandibular first premolar
e. mandibular second premolar

Lingual fossae are generally found on the
a. lingual surface of mandibular premolars
b. lingual surface of maxillary premolars c. lingual surface of anterior teeth
d. lingual surface of mandibular molars

What is the average distance from the CEJ to the entrance to the buccal furcation on the maxillary first molar?

Which of the following teeth has the most pronounced mesial curvature of the cervical line where plaque and calculus deposits may not be detected?
a. maxillary first molar
b. mandibular first molar
c. maxillary central incisor
d. mandibular canine

The lingual root on which of the following teeth has a large amount of surface area to be thoroughly instrumented?
a. maxillary first premolar
b. maxillary first molar
c. mandibular first premolar
d. mandibular first molar

The tooth with a “long waisted” root trunk most generally would be?
a. maxillary first premolar
b. maxillary second premolar
c. maxillary first molar
d. mandibular first premolar

Bifurcations are most generally present on which of the following premolars?
a. maxillary first
b. maxillary second
c. mandibular first
d. mandibular second

Which of the following teeth would most frequently feature a palatogingival groove?
a. maxillary lateral incisor
b. maxillary canine
c. maxillary first premolar
d. maxillary first molar

The tooth described as “the longest, the strongest and the last to go” is the

The tooth featuring a prominent concavity beginning on the mesial cervical one-third of the crown and extending on to the root surface is?
a. maxillary central incisor
b. mandibular central incisor
c. maxillary first premolar
d. mandibular first premolar

The most common junction of the cementum with the enamel surface is

Which of the following is found on both anterior and posterior teeth?
a. cingulum
b. triangular ridge
c. marginal ridge
d. transverse ridge

With the exception of the mandibular posterior teeth, the crowns of posterior teeth are more facially oriented than their roots. The lingual inclination of the crowns of mandibular molars is helpful in adapting dental hygiene instruments to their lingual surfaces.
a. both statements are true
b. both statements are false
c. first statement is true; second statement is false
d. first statement is false; second statement is true

The size of facial and lingual surfaces of a tooth is important to periodontal instrumentation because access to proximal surfaces depends on proximal access. More of the proximal surfaces of roots with smaller lingual than facial surfaces can be accessed from the lingual aspect.
a. Both statements are true.
b. Both statements are false.
c. The first statement is true; and the second statement is false. T
d. he first statement is false; and the second statement is true.

Which characteristic is common to maxillary and mandibular incisor roots?
a. prominent proximal root concavities b. smaller lingual than facial surfaces c. proximal surfaces are broader than lingual surfaces
d. elliptical in cervical section

Which posterior tooth exhibits the greatest variance in root morphology?

Furcation involvement can occur with attachment loss of 2 mm.
true or false
True False