A. Stamp cusps
B. Centric holding cusps
C. Supporting cusps
D. Non- supporting cusps
✅ The correct answer is option D. Non- supporting cusps.
Oral Anatomy
Beginning of eruption of permanent tooth starts_____________?
A. After completion of root
B. When apical third root is still to be formed
C. When half of the root is still to be formed
D. when root formation starts
✅ The correct answer is option C. When half of the root is still to be formed.
Basically TMJ is a_____________?
A. Ball and socket joint
B. Hinge and axis joint
C. Synovial joint
D. Diartmodal joint
✅ The correct answer is option D. Diartmodal joint.
The first evidence of calcification of primary anterior teeth begins approximately between ______________?
A. 14 to 17 weeks in utero
B. 9 to 12 weeks in utero
C. 6- to 9 weeks in utero
D. 17 to 20 weeks in utero
✅ The correct answer is option A. 14 to 17 weeks in utero.
With respect to their permanent successors the sum of the mesidodistal diameters of the first and second decidous molar is generally ____________?
A. Less
B. Greater
C. The same
D. Not related
✅ The correct answer is option B. Greater.
On opening the mouth , if the jaw deviates to the right side, it indicates the paralysis of__________?
A. Right lateral pterygoid
B. Left lateral pterygoid
C. Right medial pterygoid
D. Left medial pterygoid
✅ The correct answer is option A. Right lateral pterygoid.
Which of the following is a smallest posterior tooth______________?
A. Maxillary first premolar
B. Mandibular first premolar
C. Maxillary second premolar
D. Mandibular second premolar
✅ The correct answer is option B. Mandibular first premolar.
A radiograph of 4- years old child reveals no evidence of calcification of mandibular second pre molar. This indicates______________?
A. It is too early to make final predication
B. The teeth may develop later
C. Primary second molar extracted to allow mesial drifting of permanent first molar
D. The child may never develop premolars
✅ The correct answer is option B. The teeth may develop later.
Which of the following are the unctions of contact areas______________?
A. Distribution of occlusal stresses
B. Protection of periodontium
C. Stabilization of dental arches
D. All of the above
✅ The correct answer is option D. All of the above.
Which of the following premolars has a mesial marginal ridge more cervical than the distal marginal ridge________________?
A. Maxillary 1st premolar
B. Maxillary 2ndpremolar
C. Mandibular 1st premolar
D. Mandibular 2nd premolar
✅ The correct answer is option C. Mandibular 1st premolar.