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CEREC Doctors

Our Faculty

Comprised of some of the finest minds in Clinical Dentistry:

All of our instructors have logged countless hours using and educating clinicians on the latest trends in clinical dentistry. Whether you want to learn more about CEREC, placing or restoring implants, performing endodontics to the highest level or fine tuning your orthodontic skills, you will not find a more qualified and respected group of clinicians to guide you on your educational journey.

Sameer Puri
Vice President

Dr. Puri is the Vice President of CAD/CAM at our Scottsdale campus and is in charge of the website He has been a CEREC® beta tester since 2005.

Mike Skramstad

Dr. Skramstad is a 2000 graduate of the University of Minnesota School of Dentistry. He is a certified advanced CEREC trainer and has lectured internationally on technology, implantology and digital dentistry.

Mark Fleming
Faculty & Magazine Editor

Dr. Fleming is a 1978 graduate of The Ohio State University College of Dentistry. He serves as a consultant to a variety of dental manufacturers helping in product evaluation and design. Dr. Fleming has been a CEREC user since 2001 and a beta tester for the CEREC software since 2004.

Meena Barsoum
Faculty, D.M.D.

Dr. Meena Barsoum was born and raised in Cleveland, Ohio. He completed his undergraduate degree at Kent State University, then continued to earn his Masters of Science Degree in Anatomy from Case Western Reserve University, also in Cleveland. Dr. Barsoum remained at Case to earn his Doctor of Dental Medicine degree 4 years later.

Farhad Boltchi

Dr. Boltchi is a clinical assistant professor in the graduate periodontics program at Baylor College of Dentistry, and also maintains a full-time private practice in periodontics and dental implants in Arlington.

Darin O'Bryan

Dr. Darin O'Bryan graduated in 1997 from the University of Minnesota School of Dentistry. He practiced in Minneapolis for 7 years in a large group practice before moving to the coast of Oregon. Dr. O'Bryan currently resides in Coos Bay/North Bend where he has a private focusing on implant and digital dentistry.

Doug Smail

Dr. Doug Smail is a Board Certified Oral and Maxillofacial Surgeon. He has been in private practice for over 25 years. Dr. Smail has lectured nationally on CBCT Reading and Guided Surgical Planning. He has done many dental mission trips to six different countries over more than 27 years.

Diwakar Kinra

Dr. Diwakar Kinra grew up in Flint, Michigan and attended Powers Catholic High School. He received his dental degree from the University of Michigan, School of Dentistry, in 1999. At that time he proceeded into private practice for the next 3 years.

Dan Butterman

Dr. Dan Butterman is a 1994 graduate of the University of Maryland School of Dentistry. He also Is a graduate of the Misch International Implant Institute and a Fellow of the International Congress of Oral Implantologists.

Don Tyndall
D.D.S., M.S.P.H., Ph.D., F.I.C.D.

Dr. Don Tyndall is Professor in the Department of Diagnostic Sciences at the UNC School of Dentistry and Director of Radiology. He received his D.D.S. in 1980 from the UNC School of Dentistry, his M.S.P.H. in 1984 and his Ph.D. in 1988 from the UNC School of Public Health.

Heidi Kohltfarber
D.D.S., M.S., Ph.D.

Dr. Heidi Bridget Kohltfarber is the owner and managing oral and maxillofacial radiologist for Dental Radiology Diagnostics and a Dentsply Sirona 3D trainer. In addition, she is an adjunct professor in the Department of Diagnostic Sciences at the University of North Carolina at Chapel Hill.

Shalin Shah

Dr. Shah maintains two active orthodontic practices in Princeton Junction, NJ and Lawrenceville, PA (Center for Orthodontic Excellence) and was previously serving as a Clinical Associate in the Department of Orthodontics at the University of Pennsylvania for nine years. He received his BA, DMD, Certificate in Orthodontics, and Masters of Science in Oral Biology from the University of Pennsylvania.

Tyler Rathburn

Dr. Tyler Rathburn is a proud graduate of the University of Virginia (GO HOOS!) where he earned a BA in Religious Studies in 2009. Dr. “Tyler” earned his DMD degree at the Medical College of Georgia (now Augusta University) in 2013 and his orthodontic certificate from MCG in 2015.

Shivi Gupta

Dr. Shivi Gupta owns a private practice in San Diego, California that is focused on CAD/CAM and CBCT technology. Over the course of her 19 years in practice, her passion for digital technology has led her to use CAD/CAM to its fullest potential for crowns and bridges, implants, smile designs and orthodontics.