I highly recommend Dr. Christiansen and his staff. What a pleasure to go to the Dentist! I have had some bad dental experiences and continuous pain for over 10years in my right jaw/gum where I had a root canal. I went to several dentists & an oral surgeon for the pain, including 2 very expensive Drs. recommended as "the best in NYC", and they could not seem to figure out what was causing the pain--perhaps TMJ, bite issues..., but ultimately , that it was "not dental related." I then avoided the dentist and "dealt" with the pain. Finally, I just couldn't stand it anymore...I went to Gentech initially because the office was right down the block...I struck Gold..or Platinum, in this case. He was the 1st to notice that the root canal I had 10+yrs ago was very badly done, the crown was not fitted to my gums & much too large. I also had shards of metal from the bad crown digging into my gums. Carl put me very much at ease during the procedures (the dental hygienist -was also excellent) . My jaw is now pain free after 10+ years --it has made a wonderful difference in my life- it has allowed me smile so much more. The doc and his excellent, warm & friendly staff will take great care of you and your mouth.