Inexpensive dentist

Looked through some previous posts already but nothing really specified this so here we go: anyone know of any cheap but decent dentists in Peterborough? My spouse and I don't have insurance and he really needs some old fillings looked at and possibly redone- nothing too involved hopefully. We don't particularly need them to be very friendly, but good inexpensive work would be nice. Obviously good work is our first priority but affordable is a close second. Any leads would be appreciated.