About us

Our Company

Headquartered in Tulsa, Oklahoma, Global Dental Impression Trays, Inc. (GDIT) is a dental company founded and operated by dentists for dentists. We are committed to improving global dental procedures through innovative product development and comprehensive dental education. Our mission is to help dentists become better practitioners and better business people through dentist-centric, technologically superior products, techniques, and comprehensive education. GDIT's management is committed to affecting change in the dental industry by educating at the dental school level, dental laboratories, and practicing dentists.



TEAM MASSAD


Developing high-quality dental products and dental continuing education media requires a high-quality team of individuals. GDIT, Inc. is no exception, presently maintaining a staff of eight highly talented forward thinking dentist. Introducing the "A-Team" led by Dr. Joseph Massad, President and Founder.


Joe Massad, DDS

Joseph Massad, DDS

Dr. Massad is a practicing dentist, lecturer and entrepreneur. Dr. Massad graduated from Loyola University of Chicago in 1975. He currently holds an adjunct professor position at Tufts University School of Dental Medicine in Boston as well as The Department of Comprehensive Dentistry, University of Texas Health Science Center Dental School San Antonio, TX. He is an Associate Professor in the Department of Prosthodontics at the University of Tennessee Health Science Center, College of Dentistry, Memphis Tennessee. Dr. Massad is a Fellow in the American and International College of Dentists. Dr. Massad has given more than 500 lectures globally with an average of 50 dentists per lecture. Of the 25,000 dentists that have attended Dr. Massad's lectures, at least 500 have taken one of Dr. Massad's advanced courses.


Dr. Massad is also an author and has published various professional articles in the Journal of Prosthetic Dentistry, International Journal of Periodontal and Restorative Dentistry, Compendium of Continuing Dental Education, The Independent Journal - England, The Pankey Gram, Bulletin of American Association of Dental Examiners, Journal of the Oklahoma Dental Association, Dentistry Today, Contemporary Denture Esthetics, Inside Dentistry and Dental Economics, among others.


Dr. Massad has spent the past decade creating new businesses focused on dental product development, dental continuing education media, and multimedia productions, Dr. Massad is Co-founder of the Massad Center for Removable Prosthodontics in Tulsa, Oklahoma.

Samuel Strong, DDS

Samuel Strong, DDS

Dr. Sam Strong received his DDS from Baylor College of Dentistry. He has been involved in implant prosthetics and teaching since 1985. His lectures within the U.S. and internationally have received acclaim from restorative and surgical specialists, laboratory and dental staff members. He is a member of the American Academy of Fixed Prosthodontics, International Congress of Oral Implantologists with Fellowship and Diplomate status. He is also a Diplomate of the American Board of Dental Sleep Medicine.


In addition to lectures, Dr. Strong conducts hands-on workshops several times yearly for groups of dentists focusing on implant prosthetic systems. He has published widely in numerous journals with recent articles appearing in Dentistry Today and Dental Economics. His webcasts and DVD’s illustrating implant prosthetic procedures for fixed and removable cases are now available from the Global Institute for Dental Education (GIDE), www.gidedental.com. Dr.Sam and Stephanie Strong are also co-authors of the textbook Dental Implants, The Art and Science, Chapter 3. He maintains a private practice in Little Rock, Arkansas with an emphasis on implant prosthetics, esthetic restorations, and sleep apnea treatment. Dr. Strong is the co-designer and co-developer of the Massad Edentulous Impression Tray and the recently released Strong-Massad DenPlant Impression Tray.

William Lobel, DMD

William Lobel, DMD

Dr. Lobel graduated from Tufts University School of Dental Medicine with a DMD degree in 1972. He is currently an Associate Clinical Professor in the Department of General Dentistry at Tufts University School of Dental Medicine. He has been on the faculty at Tufts University school of Dental Medicine for 14 years while still maintaining his private practice in Saugus, Ma. He received the Dean's Award for Excellence in Clinical Teaching by the Undergraduate Classes of 2001, 2003 and 2004. He was a member of the Adjunct Faculty at the University of Oklahoma College of Dentistry and is also Co-founder of the Massad Center for Removable Prosthodontics in Tulsa, Oklahoma. Dr. Lobel is an OKU faculty member at Tufts as well as a Fellow of the American College of Dentists, Pierre Fauchard Academy, International College of Dentists, American Academy of Dental Science and the International Academy for Dental Facial Esthetics.

Richard June, DDS

Richard June, DDS

Dr. Richard P. June is a 1975 gradate of the Loyola University of Chicago College of Dentistry and of the General Practice Residency Programs at the Chicago West-side V.A. Hospital, the University of Illinois Hospital, and Cook County Hospital. Besides his memberships in the American Dental Association and The Illinois State Dental Society, he is a fellow in The American College of Dentists, The International College of Dentists, The Academy of Dentistry International and the American College of Dental and Facial Esthetics. Dr. June currently maintains a restorative practice in Henry, Illinois and a removable prosthodontic practice in Peoria, Illinois. Dr. June lectures throughout the United States on Removable Prosthodontics and is a clinical instructor at The Massad Institute in Tulsa, Oklahoma, where he is also a Co-Founder of the Massad Center for Removable Prosthodontics.

Joseph Thornton, DDS

Joseph Thornton, DDS

Dr. Thornton graduated from Emory University School of Dentistry in 1979. He began attending courses at the L.D. Pankey Institute in 1995 and completed the continuum series in 2000. Dr. Thornton received a Fellowship Award from the Academy of General Dentistry in 2003. Dr. Thornton was an adjunct professor at the University of Oklahoma School of Dentistry and is also Co-Founder of the Massad Center for Removable Prosthodontics in Tulsa, Oklahoma.

William Davis, DDS, MS

William Davis, DDS, MS

Dr. Davis graduated from Marquette University School of Dentistry in 1970 and earned his M.S. in Prosthodontics from the University of Michigan School of Dentistry in 1977. Dr. Davis is the Director of the GPR and is presently the Associate Dean at the University of Toledo Hospital. In 1987, he co-authored with Dr. L.D. Pankey, "A Philosophy of the Practice of Dentistry", and has a second book titled, "A Philosophy of Wealth Accumulation for Dentists". Dr. Davis is Co-Founder of the Massad Center for Removable Prosthodontics in Tulsa, Oklahoma.

David Little, DDS

David Little, DDS

Dr. David Little is a graduate of the University of Texas Health Science Center at San Antonio Dental School. He maintains a multidisciplinary, state-or-the-art dental practice in San Antonio where he dedicates himself to developing and refining his knowledge skills—as well as those of his colleagues and peers—through extensive continuing education and product research.


As a clinical researcher focusing on implants, restorative materials, and technology, Dr. Little develops predictable procedures for successful functional and esthetic outcomes. His passion for helping others drives him to share this expertise in emerging restorative techniques and materials through various workshop, clinical seminars, and peer-reviewed publications. Dr. Little also serves as a professional dental consultant, sharing his theories and techniques for team motivation, for which he has earned worldwide acclaim.


As a result of his vision, leadership, and professional commitment, Dr. Little is highly regarded throughout the dental profession. Dr. Little is an accomplished national and international speaker and professor and has been a featured lecturer and hands-on course instructor at the American Dental Association annual scientific session, the Yankee Dental Congress, the American Academy of Cosmetic Dentistry annual scientific session, the Chicago Midwinter Meeting, the Greater New York Dental Meeting, and other dental society meetings. Dr. Little has been featured on the cover of Dental Economics, Dentistry Today and The Progressive Dentist. His articles have appeared in Compendium of Continuing Education in Dentistry, Inside Dentistry, Dentistry Today, Practice Procedures & Aesthetic Dentistry, and the Journal of Dentistry, among others.

Mostafa El-Sherif, DMD, MScD, PhD

Mostafa El-Sherif, DMD, MScD, PhD

Dr. El-Sherif graduated from Alexandria University College of Dentistry in 1979 and completed a Masters Degree in Restorative Dentistry in 1983. In 1990, he earned a PhD in Fixed Prosthodontics and Dental Materials with joint supervision by Oklahoma University College of Dentistry and Tanta University. He has numerous national and international publications in more than 5 different languages in prosthodontics and restorative and cosmetic dentistry. He has lectured nationally and internationally in Fixed Prosthodontics and Dental Materials. He is currently a visiting Associate Professor with the Restorative Department Oklahoma University College of Dentistry. He is an adjunct professor in the Restorative Department at Tufts University School of Dental Medicine, the Chairman Emeritus of the American College of Forensic Examiners, President of the 21st Century Dental Study Club, member of the Academy of Operative Dentistry since 1983, ex President of the Tufts Dental Alumni, Executive Board member of the Dental M Club, Trustee ,Concord Hospital Trust Board and panel member of New Hampshire Superior Court for medical malpractice. Since 1995, Dr. El-Sherif has been in private practice in Concord, New Hampshire.

Tony Daher, DDS, MS

Tony Daher, DDS, MS

Dr. Tony Daher began practicing dentistry in California in 1982 and his love for teaching promoted him to earn in 1984 a Master's of Science degree in Medical Education from the University of Southern California (USC). Dr. Daher received a postgraduate certificate in Prosthodontics in 1988 from the University of California at Los Angeles (UCLA). He was the clinic director for the international student program at U.S.C. in 1991; and director of the Graduate Prosthodontic Program in Loma Linda University. Dr. Daher is currently an Associate Professor of Prosthodontics in the Center for Prosthodontics and Implant Dentistry at Loma Linda University (LLU). He has written many scientific and clinical articles, and has lectured nationally and internationally on the subject of Prosthodontics. He is a Diplomate of the American Board of Prosthodontics, a Fellow in the American College of Prosthodontists, and an active member in numerous organizations including the Academy of Osseointegration, the Academy of Fixed Prosthodontics, the American Dental Association, the California Dental Association and the Tri-County Dental society. Dr. Daher currently maintains a private practice limited to Prosthodontics in LaVerne, California.