The Chao Pinhole® Surgical Technique (PST®), invented and patented by John Chao, D.D.S., is a scalpel-free, suture-free procedure for treating gum recession.
Through a small hole made by a needle, specially designed instruments are used to gently loosen the gum tissue and glide it over the receded part of the tooth. Since there is no cutting or stitching, patients can expect minimal post-operative symptoms (pain, swelling and bleeding). Most patients are also pleasantly surprised by the instant cosmetic improvement in as little as one hour. This technique has garnered national attention from networks such as ABC and NBC and over 240 other stations across the United States and Canada. Patents and trademarks on the PST method and PST instruments have been granted by the U.S. Patent and Trademark Office.