Can you guys complain to the dental association about your experiences? why not write a letter of everything that occured giving your details and name and send a copy to the American dental association, the Mexican dental association and whoever else that you think will take note. Make sure they all know that you have sent a copy to the others. If nobody does anything, then people like this will never be taken down. The more people who do this the more they will take notice and maybe something will be done. Even if nothing comes of it id do it anyway.