(Strip Number 191, Original Publication Date, 6 November 1981)
Panel 1: We begin with John and Jean about to perform some sort of procedure on a man with a beard named George; he tells her to give George safety goggles and a stereo headset.
Panel 2: Having put the nitrous oxide mask over the man's nose and installed the rubber dam and clamps, Maskless, Gloveless John is ready to proceed.
Panel 3: First though, he has to boast that yessir, modern technology has made dentistry almost fun for the patient.
Panel 4: Jean's asking "What patient?" reveals that Lynn has a Lynntractable opinion about what Rod does for a living.
Summary: Simply put, she looks at all the rig-up needed to make sure that the Georges of the world aren't at any great risk of infection as somehow robbing them of their identity. That's because she needs to look at a face to identify someone as human. (I realize that didn't make much sense but then neither is acting as if wearing a mask annihilates who someone is.)