Dr. Richard P. Gangwisch, D.D.S., M.A.G.D., A.B.G.D.
Board Certified General Dentist

Dr. Gangwisch earned his Doctor of Dental Surgery degree from Ohio State University in 1977. He is currently a clinical assistant professor at the Augusta University Dental College of Georgia teaching clinical dentistry part-time to senior dental students and post-doc dental residents. He was recognized by the Pierre Fauchard Academy (a prestigious dental society) as Volunteer Faculty of the Year in 2022 for teaching excellence.

He served as a dental officer in the United States Navy for two years after graduation, and opened his practice of cosmetic, sedation and family dentistry in Lilburn, GA in 1979. He was a part-time clinical instructor of operative dentistry at Emory University's School of Dentistry from 1979-1988. He has volunteered his time at the Ben Massell Dental Clinic for indigent care since 1983.

He received his fellowship from the Academy of General Dentistry in 1991. In 2002, Dr. Gangwisch earned a Mastership from the Academy of General Dentistry. This award is earned by completing over 600 hours of continuing education in the various disciplines of dentistry. In 2007, Dr. Gangwisch attained board certification from the American Board of General Dentistry. This award is earned by taking written and oral examinations and presenting actual cases performed to exhibit proficiency in all aspects of dentistry. Board certification is an award that has been bestowed on relatively few general dentists.

In 2012 and 2022, Dr. Gangwisch was honored with the Lifelong Learning and Service Recognition award from the Academy of General Dentistry. This prestigious honor is given to dentists who have attained Mastership and have continued their commitment to continuing education and have donated a significant amount of time doing volunteer dental work.

Dr. Gangwisch has been married to the former Lori Hanna since 1977. They have two sons, Jason, born in 1981 and Steven, born in 1984, and three wonderful grandchildren. Dr. Gangwisch spends his free time with extensive travel.

Dr. John D. Hulsey, D.M.D., F.A.G.D.

Experience and education matter in the quality of dental care you receive. Dr. Hulsey has practiced dentistry since 1994 with all but two of those years right here at Killian Hill Dental Care.

Dr. Hulsey earned a BS in Biology from Emory University in 1988.

He then earned his Doctor of Dental Medicine degree from the Medical University of South Carolina in Charleston in 1994.

Following that, he completed a General Practice Residency at East Carolina University in Greeneville, North Carolina in 1995

He earned a Fellowship with the Academy of General Dentistry in 2018. This is in recognition of his commitment to quality patient care through attending over 500 hours of continuing education courses in various dental disciplines, and achievement through testing his knowledge in these subjects.

He has been a regular volunteer at the Ben Massell Dental Clinic for indigent care in Atlanta since 2003.

Dr. Hulsey has been a native of Lawrenceville since 7 years old, with exception of his dental school years. He enjoys spending time with his wife Lauren, playing bluegrass music, bicycling, and fishing.

Dr. William Cao, D.M.D.

Dr. William believes that a healthy smile begins with truly listening to each patient’s needs and building trust through personalized, compassionate care. His dedication to dentistry grew from a desire to help others feel confident and comfortable in their oral health journey.

Originally from Vietnam, Dr. William came to the United States in 2013 and has been living in Georgia ever since—proudly calling it his second home. He earned a Bachelor of Science in Chemistry from Georgia State University in 2019, then completed his Doctor of Dental Medicine degree at the Dental College of Georgia at Augusta University, where he graduated first in his class.

During dental school, Dr. William was inducted into Omicron Kappa Upsilon (OKU), the national dental honor society recognizing exceptional scholarship and character. As part of this distinction, he received a senior scholarship awarded to just two students with the highest GPAs in his class. His commitment to academic excellence was further recognized through the Senior Academic Achievement Award and the Senior Comprehensive Care Case Award.

Throughout his training, Dr. William enjoyed tutoring fellow students, volunteering at local community programs, and presenting research projects—all of which deepened his dedication to lifelong learning. Today, he remains committed to staying at the forefront of modern dentistry to provide the highest level of care to his patients.

Outside the office, Dr. William enjoys traveling and spending time with his family. He is fluent in both English and Vietnamese, allowing him to care for a diverse patient community with warmth and understanding.