Two views of cervical spine. Report code _____

Early tissue reactions are

a. common in diagnostic imaging. b. not common in diagnostic imaging. c. a result of irradiation of acellular tissue. d. a result of grenz rays in a diagnostic x-ray beam.

The easiest way to distinguish the first from the second premolars are the  ___________________ .

Fill in the blank(s) with the appropriate word(s).