2020 Dentsply Sirona Global Case Contest Third Place Winner
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2020 Dentsply Sirona Global Case Contest Third Place Winner

Published: Thursday, August 20, 2020

OKLAHOMA CITY -- The University of Oklahoma College of Dentistry is pleased to announce that Dr. Gabriel Duffy placed third at the 2020 Dentsply Sirona Global Case Contest (North America). This is the first time someone from the College of Dentistry has placed and participated in this contest. 

The Dentsply Sirona Global Case Contest is a worldwide contest for pre-doctoral dental and graduate dental students. Students submit restorative cases using photography and text to display the levels of decay and treatment plan using Dentsply materials. There have been nearly 4,000 applicants since the contest’s inception in 2004.

“I hope that Dr. Duffy’s achievement will inspire our students to compete in future years,” said Dr. Sharukh S. Khajotia, associate dean of research at the OU College of Dentistry.

Dr. Duffy was born in Summertown, TN, but spent most of his youth in Hartshorne, OK. He earned a Bachelor of Business Administration in Management from Northeastern State University. He then attended the OU College of Dentistry, where he earned his Doctor of Dental Surgery in 2020. 

His faculty mentor for the contest was Dr. Abbey Onan, originally from Tulsa, but calls Edmond home. She completed her undergraduate degree from OU in 1999 and earned her Doctor of Dental Surgery from the OU College of Dentistry in 2004. After a short stint in Chicago, she began teaching part-time at the college in 2007. 

When asked about Dr. Duffy, she said, “I am extremely proud of Dr. Duffy, not only on his amazing talents associated with this contest, but with his everyday efforts to do his very best. He has an amazing spirit and heart.”

Dr. Duffy is an active member of the United States Air Force, where he was promoted to Captain in June 2020. He is a member of the American Dental Association, the Oklahoma Dental Association, and the Academy of General Dentistry. 



The OU College of Dentistry is home to the state’s only doctor of dental surgery program and baccalaureate degree program in dental hygiene. More than 60 percent of the state of Oklahoma’s dentists are graduates of the OU College of Dentistry. The college provides general dental care and specialty care to Oklahomans through student, resident and faculty practice clinics. The OU College of Dentistry has established a reputation of training its students to provide the highest quality of clinical care available.


OU Medicine — along with its academic partner, the University of Oklahoma Health Sciences Center — is the state’s only comprehensive academic health system of hospitals, clinics and centers of excellence. With 11,000 employees and more than 1,300 physicians and advanced practice providers, OU Medicine is home to Oklahoma’s largest physician network with a complete range of specialty care. OU Medicine serves Oklahoma and the region with the state’s only freestanding children’s hospital, the only National Cancer Institute-Designated Stephenson Cancer Center and Oklahoma’s flagship hospital, which serves as the state’s only Level 1 trauma center. OU Medicine is the No. 1 ranked hospital system in Oklahoma, and its oncology program at Stephenson Cancer Center and OU Medical Center ranked in the Top 50 in the nation, in the 2019-2020 rankings released by U.S. News & World Report. OU Medicine was also ranked by U.S. News & World Report as high performing in four specialties: Ophthalmology in partnership with Dean McGee Eye Institute, Colon Surgery, COPD and Congestive Heart Failure. OU Medicine’s mission is to lead healthcare in patient care, education and research. To learn more, visit oumedicine.com