Here is a great case that we just recently finished. Steve had lost his front tooth (which had a root canal and crown) due to a fracture of the root. We decided to extract the tooth and immediately place an implant and temporary crown.
After about 2 months we removed the temporary, took and impression and had the lab fabricate a custom abutment (post that goes in implant) and all ceramic implant supported.
The end result is a beautiful crown that no one can tell is an implant crown.