Use Case B to Answer the Following Questions

Use Case B to answer The Following questions
CASE BPermanent Dentition
An adult female client new to the dental practice expresses an interest in orthodontic treatment. The client has a moderate caries risk and a tongue thrust swallowing pattern. Three carious lesions on the proximal surfaces are recorded during the dental examination, and the client admits that she does not floss. She informs the hygienist that she has "a sore spot on the left side of her mouth" that hurts when she eats. Use Case B and Figures 5-29 and 5-30 to answer questions 13-20.
-Which of the following statements concerning root anatomy is TRUE?

A) The proximal surfaces of maxillary incisors are more accessible from the facial approach
B) Mandibular first premolars are oval or elliptical in cross-section and may have distal concavities
C) Maxillary second premolars are broad proximally and oval in cross-section
D) Mandibular canines have one root and are round in cross-section