John Y. Kwan, DDS is a retired periodontist and a former diplomate of the American Board of Periodontology, and a clinical professor at the University of California San Francisco School of Dentistry. He is a graduate of the University of Southern California School of Dentistry and received his specialty certification at Louisiana State University School of Dentistry. His clinical background included microsurgery and periodontal endoscopy. Dr Kwan developed the current Perioscope while he was the CEO of Perioscopy Inc, which is now part of Zest Dental Solutions family of dental companies.