Just returning, perhaps fleetingly, to the original subject, it occurs to me that supradentulous may be an example of a recent AWAD weekly theme "Brand names that have entered the dictionary".

Supradent is a model of dentist's chair, marketed by Sabrotech:
http://www.sabro-tech.com/prod/prod_4.html

So it occurs to me that "supradentulous" may be a derived adjective, probably meaning "laid-back", just as "hooverful" could describe something that really sucks.