How long can I keep the temporary crown?

After I got my implant, a temporary crown was place right after (last oct 25, 2012), until now (march 2013) I’m still wearing a temporary crown . Will it compromise my implant since I didn’t put the permanent crown on right away? How long can I hold on to with my temporary crown. What is the general cost for one permanent crown (I’m in San Francisco, CA)? Thank you

Featured Products

OsteoGen Bone Grafting Plug
Combines bone graft with a collagen plug to yield the easiest and most affordable way to clinically deliver bone graft for socket preservation.
CevOss Bovine Bone Graft
Make the switch to a better xenograft! High volume of interconnected pores promotes new bone. Substantially equivalent to BioOss and NuOss.