For several years I was very satisfied, but that changed on my second dental implant. On the first one, an oral surgeon did the sinus grafting, and Dr. Liu did the implant. That went very well. But on the second implant, Dr. Liu extracted a tooth, did the sinus grafting, and inserted 3 implants on the same session. The implants got infected, and had to be removed. What bothered me was the false statements made during the time of the problems. He tried to pass the problems off as nothing. That upset me. Honesty would have made 4 months of infection go better. I was in pain and discomfort for 4 months until removal.