What is the Chao Pinhole® Surgical Technique (PST)?

The Chao Pinhole® Surgical Technique (PST) was invented by John Chao, DDS, MAGD. It is a scalpel-free, suture-free procedure for correcting gum recession. A small hole is created by a needle, where the specially designed instruments loosen the gum tissue and glide it over the receded part of the tooth. Since this procedure does not involve cutting or stitching, patients can expect minimal symptoms (pain, swelling, bleeding).

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