Saw this infographic from Carrington College's Dental Assisting Program in California. I'm not sure I agree with the personality aspects of this graphic, but it's interesting to note what is out there in terms of information.

Source: http://carrington.edu/cccblog/programs/dental-assisting/teeth-and-your-personality/

Hans Skariah, B.Sc., DMD
Promenade Court Dental Health Group in Mississauga
2233 Hurontario St., Mississauga, ON, Canada
(1/2 km north of the QEW in the Dome Building)
(905) 273-7100