In my case it will be four visits. The total time can be anywhere from 3-6 months. Generally the longer you wait after the initial implant the better.
Ist Visit - Consultation and extraction of damaged tooth. Needed to wait one month after extraction before getting implant.
2nd Visit - Drill into the bone and install implant, close the area up and wait 3-6 months. I had a follow up visit 10 days later so he could just make sure everything was ok. No infection etc. I'm not counting that one since it could be considered optional.
3rd Visit - Open the gum over the implant and install post on the implant which is left exposed. Then an impression was taken to make the crown.
4th Visit (next week) - Have crown installed. That should complete the process. Total time will be a couple weeks less than 6 months.