I developed serious periodontal disease under his care for my braces. He completely neglected me and did not diagnose the problem until the braces were removed. Once we found out, he tried to treat it himself instead of refering me to a professional periodontist. The treatment was too little and too late.
As a consequence of the disease, I lost my two molars. It also cost me a lot of money and pain. I'm still fighting the disease today, trying to get implants.
His chair-side manner is cold and distant. Some of his hygienists were quite rude. I was a poor student when this happened. If I had known better, I would never stayed with him.