Before I found Dr. Kwan in Oakland, I had consulted 12 dentists/periodontists. All of them said that because of severe bone loss, they could do nothing to help me. Dr. Kwan was able to perform root planing and scaling using the perioscope and ultrasonic scaler. Because I had been so traumatized by a periodontist in San Mateo, Dr. Kwan recommended conscious sedation. He also encouraged my spouse to be present for the procedure so that I wouldn't be anxious. His method of cleaning and disinfecting, accompanied by systemic antibiotics works. I have regained attachment and am growing bone.