The Area of No

Multiple Choice

The area of No. 11 and No. 12 will provide instrumentation challenges due to which of the following canine and first premolar features?

A) Inclined axial positioning of the maxillary canine and narrow premolar proximal surfaces
B) Ovoid maxillary canine root shape and cone-shaped premolar root
C) Prominent maxillary canine root concavities and prominent distal premolar root concavity
D) Long canine crown with a broad distal crest of curvature and short first premolar crown with a prominent mesial concavity