I was missing 2 upper molars and had implants done 7 years ago. I had 3 surgeries in total: first for bone grafting, then implants inserted, then reinserted (2 weeks after putting them in first time) as surgent felt I needed thicker ones instead.
All surgeries were under general anestesia and did not cause any considerable discomfort during or after, and no work time was lost. What general anestesia caused though was some confusion: after one of the surgeries I fell off the staircase on the same day, after the last one I fell into my pool.
All that was fine and well worth it, but 6 years afterwards one of my implants failed: it got loose and simply fell out, painlessly.
According to my doctor, bone density around this implant was not sufficient (he tested crombs of bone on the implant I brought to him).
My second implant is doing just fine. I intend to go through the routine again: I need do bone grafting surgery and then the actual implant surgery again: wearing partial is such a pain in the neck!