Stephen K. Harrel, DDS, is a Diplomate of the American Board of Periodontology and maintained a private practice limited to periodontics in Dallas, Texas for over thirty years.  He is also President of Texas Medical and Dental Designs LLC, and an adjunct professor at the Texas A&M Health Science Center Baylor College of Dentistry in Dallas, Texas. Dr. Harrel’s research has been in minimally invasive periodontal therapy, occlusion and periodontal disease, periodontal treatment outcomes, and infection control. He has contributed chapters to textbooks and has published numerous articles in peer-reviewed journals. Dr. Harrel lectures throughout the U.S. Thomas G. Wilson, Jr., DDS, is a Diplomate of the American Board of Periodontology and has a private practice limited to periodontics in Dallas, Texas. Dr. Wilson has lectured extensively on a national and international level and is the author of numerous professional publications and books on periodontics and implant dentistry. He is a Clinical Associate Professor at the University of Texas at San Antonio Dental School and Baylor University College of Dentistry and has served as editor-in-chief of an international dental journal and associate editor of the Journal of Periodontology.