https://en.wikipedia.org/wiki/Painless_Parker

He legally changed his first name to "Painless" when he was accused of breaking a false advertisement law by claiming that his dentistry was truly painless.[1][2] When business thrived, he hired assistants and established a chain dentistry business.[2] In the end, Parker ran 28 West Coast dental offices, employing over 70 dentists, and grossing $3 million per year.

In 1892, a Canadian dentist called Edgar Parker

born Edgar R.R. Parker, 22 March 1872

DUDE WAS ONLY 20 WHEN HE STARTED THIS!?

That's also where the concept of a "barbershop quartet" came from. Dentists would have the aforementioned quartet singing loudly outside of their shop to drown out the screaming of patients inside.

The wild part is what's cut off in the bottom section.

However, "Much of what he championed—patient advocacy, increased access to dental care, and advertising—has come to pass in the U.S.

So I guess, possibly not as bad as the opening line makes him sound, and perhaps even an improvement over the standards of the time

Some other choice sections.

The band attracted large crowds and hid the moans and cries of patients who were given whiskey or a cocaine solution that he called "hydrocaine" to numb the pain.[2] He charged 50 cents for each extraction and promised that if it hurt, he would pay the patient $5.

he Historical Dental Museum at the Temple University School of Dentistry has a display dedicated to Parker, with his necklace of 357 teeth and a large wooden bucket filled to the brim with teeth that he had personally pulled. The bucket of teeth sat by his feet as he lectured the crowds on the importance of dental hygiene.

Almost sounds like the guy may have been maligned by his fellow dentists for calling them out on their BS.

I love how street dentist is a blue link.

Did the concept of "arracheur de dent" didn't exist in North America?

You can't break the law of there's no law to break.