Making a sterile field unclean or having pathogens placed within it is called ________

What compound was the FIRST used in controlled water fluoridation programs and is still used in smaller communities?

A) Stannous fluoride B) Neutral fluoride C) Sodium silicofluroide D) Sodium fluoride

When more photons are absorbed photoelectrically, the resulting radiograph has

a. greater image distortion. b. less image distortion. c. greater radiographic image density. d. less radiographic image density.