RD1 Exam 2 Questions With 100%
Correct Answers 2025
What is the name of the accessory cusp on the maxillary first molar? Which cusp is it found on?
- CORRECT ANSWER✔✔Cusp of Carabelli on the mesial lingual cusp
In normal Class I occlusion, #23 occludes with? - CORRECT ANSWER✔✔#9 and #10
Where is the height of contour on the buccal surface of the mandibular first molar? - CORRECT
ANSWER✔✔Cervical third
Which of the permanent molars has the widest crown mesiodistally? - CORRECT
ANSWER✔✔Mandibular first molar
When viewed from the mesial aspect, the mesial contact area of a permanent maxillary first
molar is _________ to the faciolingual center of the crown - CORRECT ANSWER✔✔Facial to
The maxillary tooth having the greatest statistical variation in root alignment is the - CORRECT
ANSWER✔✔third molar
The smallest cusp on the mandibular first molar is the - CORRECT ANSWER✔✔distal cusp
As viewed from the occlusal, the mesial contact area of the mandibular _________ molar is
located further buccally than any of the other contact areas on mandibular posterior teeth. -
CORRECT ANSWER✔✔first
,Permanent mandibular molars are aligned in the alveolar bone in such a way that their crowns
are tilted... - CORRECT ANSWER✔✔Distally and lingually
Which of the following types of ridges is unique to permanent maxillary molars?
a. a labial ridge
b. a marginal ridge
c. an oblique ridge
d. a transverse ridge - CORRECT ANSWER✔✔c
Any union of two triangular ridges produces a single ridge which is called;
a. a cusp ridge
b. a marginal ridge
c. a transverse ridge
d. a proximal ridge - CORRECT ANSWER✔✔c
The oblique ridge on an upper first molar connects:
a. distobuccal cusp with the mesiolingual cusp
b. mesiobuccal cusp with the distobuccal cusp
c. distolingual with the mesiolingual cusp
d. mesiobuccal cusp with the mesiolingual cusp - CORRECT ANSWER✔✔a
The most reliable distinguishing feature of the mandibular third molar is the:
, a. Fused and compressed root system
b. Short, bulbous outline of the crown
c. Marginal ridge forming a smooth circle
d. Marked distal inclination of the root trunk
e. Great morphological resemblance to the first molar - CORRECT ANSWER✔✔d
Which tooth frequently exhibits a small fifth cusp attached to the lingual surface of the
mesiolingual cusp?
a. Maxillary second molar
b. Maxillary first molar
c. Mandibular first molar
d. Mandibular second molar - CORRECT ANSWER✔✔b
On maxillary molar the largest, longest, and strongest of the three roots is the:
a. Mesiobuccal
b. Distobuccal
c. Palatal - CORRECT ANSWER✔✔c
Which tooth has a small DL cusp that can be absent, creating a three-cusp tooth?
a. Mandibular second molar
b. Maxillary first molar
c. Mandibular first premolar
d. Maxillary second molar - CORRECT ANSWER✔✔d
Correct Answers 2025
What is the name of the accessory cusp on the maxillary first molar? Which cusp is it found on?
- CORRECT ANSWER✔✔Cusp of Carabelli on the mesial lingual cusp
In normal Class I occlusion, #23 occludes with? - CORRECT ANSWER✔✔#9 and #10
Where is the height of contour on the buccal surface of the mandibular first molar? - CORRECT
ANSWER✔✔Cervical third
Which of the permanent molars has the widest crown mesiodistally? - CORRECT
ANSWER✔✔Mandibular first molar
When viewed from the mesial aspect, the mesial contact area of a permanent maxillary first
molar is _________ to the faciolingual center of the crown - CORRECT ANSWER✔✔Facial to
The maxillary tooth having the greatest statistical variation in root alignment is the - CORRECT
ANSWER✔✔third molar
The smallest cusp on the mandibular first molar is the - CORRECT ANSWER✔✔distal cusp
As viewed from the occlusal, the mesial contact area of the mandibular _________ molar is
located further buccally than any of the other contact areas on mandibular posterior teeth. -
CORRECT ANSWER✔✔first
,Permanent mandibular molars are aligned in the alveolar bone in such a way that their crowns
are tilted... - CORRECT ANSWER✔✔Distally and lingually
Which of the following types of ridges is unique to permanent maxillary molars?
a. a labial ridge
b. a marginal ridge
c. an oblique ridge
d. a transverse ridge - CORRECT ANSWER✔✔c
Any union of two triangular ridges produces a single ridge which is called;
a. a cusp ridge
b. a marginal ridge
c. a transverse ridge
d. a proximal ridge - CORRECT ANSWER✔✔c
The oblique ridge on an upper first molar connects:
a. distobuccal cusp with the mesiolingual cusp
b. mesiobuccal cusp with the distobuccal cusp
c. distolingual with the mesiolingual cusp
d. mesiobuccal cusp with the mesiolingual cusp - CORRECT ANSWER✔✔a
The most reliable distinguishing feature of the mandibular third molar is the:
, a. Fused and compressed root system
b. Short, bulbous outline of the crown
c. Marginal ridge forming a smooth circle
d. Marked distal inclination of the root trunk
e. Great morphological resemblance to the first molar - CORRECT ANSWER✔✔d
Which tooth frequently exhibits a small fifth cusp attached to the lingual surface of the
mesiolingual cusp?
a. Maxillary second molar
b. Maxillary first molar
c. Mandibular first molar
d. Mandibular second molar - CORRECT ANSWER✔✔b
On maxillary molar the largest, longest, and strongest of the three roots is the:
a. Mesiobuccal
b. Distobuccal
c. Palatal - CORRECT ANSWER✔✔c
Which tooth has a small DL cusp that can be absent, creating a three-cusp tooth?
a. Mandibular second molar
b. Maxillary first molar
c. Mandibular first premolar
d. Maxillary second molar - CORRECT ANSWER✔✔d
