Dr. Duello received his DDS degree in 1979 from the University of Missouri School of Dentistry in Kansas City. He completed his Residency in Periodontics and received a MS degree in Oral Biology at UMKC School of Dentistry in 1981. Dr. Duello has been in private practice in St. Louis, Missouri, USA since 1983. He is a Diplomate of the American Board of Periodontology and a fellow of the American College of Dentists. Dr. Duello is the Director of the Gateway Study Club, a Seattle Study Club, in St. Louis. Dr. Duello was one of the first US periodontists trained in the Branemark technique in 1987. He is a Key Opinion Leader for Nobel Biocare in the US and has taught All-on-Four and NobelClinician throughout the world. Dr. Duello has been involved extensively in planning continuing education in the US with the American Academy of Periodontology and the Seattle Study Club. Dr. Duello has published on the All-on-Four technique and has presented Webinars on DentalXP on the All-on-Four.