Which of the following do not contribute to arch stability ?
A. Cusps
B. Root forms
C. Embrasures
D. Periodontal fibers
Physiologic Form of Tooth and Periodontium
Mesial contact area of the permanent canine is at the______________?
Mesial contact area of the permanent canine is at the______________?
A. Middle third
B. Junction of the incisal and middle thirds
C. Junction of the middle and cedrvical thirds
D. None of the above
Distal contact of upper first premolar is________________?
Distal contact of upper first premolar is________________?
A. Lower than mesial contact area
B. Little cervical to junction of occlusal and middle third of crown
C. Higher than mesial contact area
D. A and B
The contact area on the distal surface of a maxillary first premolar should be placed in________________?
The contact area on the distal surface of a maxillary first premolar should be placed in________________?
A. Middle 3rd of proximal surface with lingual embrasure greater than the facial embrasure
B. Occlusal 3rd of proximal surface with the lingual embrasure greater than facial embrasure
C. Occlusal 3rd of proximal surface with facial embrasure greater than lingual embrasure
D. Middle 3rd with facial embrasure greater than the lingual embrasure
The tooth that is commonly seen in an abnormal relation and contact with its adjacent teeth of the same arch is ________________?
The tooth that is commonly seen in an abnormal relation and contact with its adjacent teeth of the same arch is ________________?
A. Mandibular first premolar
B. Mandibular lateral incisor
C. Maxillary central incisor
D. Maxillary lateral incisor
Largest embrasure lies between______________?
Largest embrasure lies between______________?
A. Maxillary central incisors
B. Maxillary central and lateral incisor
C. Maxillary canine and first premolar
D. Maxillary lateral incisor and canine
The embrasure areas in the following areas are contentious______________?
The embrasure areas in the following areas are contentious______________?
A. Labial and lingual
B. Lingual and Occlusal
C. Incisal and Occlusal
D. Labial and Occlusal
All embrasure spaces are reflection of the______________?
All embrasure spaces are reflection of the______________?
A. Form of the teeth involved
B. Size of the teeth involved
C. Eruption sequence involved
D. None of the above
The biting forces at molar region during mastication is_______________?
The biting forces at molar region during mastication is_______________?
A. 20 to 55 pounds
B. 30 to 75 pounds
C. 50 to 75 pounds
D. 90 to 200 pounds
The faciolingual angulation of the upper central incisor is approximately___________________?
The faciolingual angulation of the upper central incisor is approximately___________________?
A. 20°
B. 28°
C. 33°
D. 38°