While Mexican dental vacation destinations like Cabo and Cancun are better know (and pricier) accommodations and dentist prices in Puerto Vallarta fall closer in line with popular low cost destinations such as Tijuana and Los Algodones. PV is a more traditional vacation destination catering to Mexicans as much as foreigners and has a lower cost of living than the more upscale beach destinations.
Truth in advertising goes out the bus window along with consumer protection laws when you cross the border.
They are there to help the dental tourist find high quality dentistry at an affordable price. Which is what everyone is praying for when they take a dental vacation.