In Mexico quality is problematic and here’s why. General dentists in Mexico untrained in dental implants, cosmetic dentistry, root canals etc. can legally attempt advanced dental procedures by practicing on unsuspecting patients.
This situation is not the result of any conspiracy, or criminality – just less consumer protection laws. It used to be the same situation in the US many decades ago. But the Mexican government does not get in the way of any general dentists in Mexico who want to learn advanced dentistry the old-fashioned way – by trial and error on their patients (that’s you and me).