Going to the doctor once a year is pretty important. You need to make sure you're in peak physical condition! Unfortunately, though, when it comes to people's teeth, they sometimes fall a bit behind in keeping up with personal hygiene.
The bathroom isn't necessarily the worst place for a teeth cleaning. In fact that's where most folks regularly brush their teeth. Nevertheless, you wouldn't want to show up for a dental appointment for your checkup and be taken into the bathroom.
A dental office in Grand Junction was busted by the IRS in a tax raid and the owner was still practicing dentistry despite having no license. Apparently despite a decade old order to stop playing dentist the 'dentist' was still accepting patients.