Here are two articles that dispel the myth that bartering for medical services is not legal. There are certain situations where it is not legal, but in most cases it is. Read for details.
And of course, if you know a Dentist or Doctor who barters, please let us know, or let them know about BarterSphere.
http://www.ama-assn.org/amednews/2009/01/12/bisa0112.htm
http://www.allbusiness.com/government/government-bodies-offices/12755698-1.html
Too sexy.