Level 2: Loyd V. Tilt D.D.S., M.S. http://www.periolaser.com Dr. Richard Offutt and Dr. Paul Gibbs http://www.theperioplace.com Periodontal Associates of Chattanooga, P.A. http://www.chattanoogaperio.com Level 3: Robert J. Ryan, D.D.S., Ltd. http://www.ryanperio.com Texas Academy of Pediatric Dentistry http://www.tapd.org Massachusetts Academy of Pediatric Dentistry http://www.mapd.org Dentistry for Children http://www.dentistryforchildren.com Southwestern Society of Pediatric Dentistry http://www.swspd.org