I went to see Dr. Clark for Invisilign braces, paid $5,000 cash received my first set and was told I needed wilkodontics surgery a very invasive and expensive surgery. I refused to do the surgery after receiving three independent opinions from other orthodononstists who said I absolutely do not need surgery. When I refused to give Dr. Clark $18,000 for surgery, he got very angry and refused to do my Invisiligh treatment and/or give me my money back...he took $5,000 of my money which he has never repaid and still refuses to finish my Invisilign treatment.