About Us

Paul B. Kim


Dr. Paul Kim has been committed in professional dental career since 2002. He is a graduate of Columbia University College of Dental Medicine, followed by Prosthodontic Award upon graduation in 2002. He has successfully completed his residency at NY Methodist Hospital. Furthering his career path, he earned his certificate in Advanced Aesthetic Dentistry at Rosenthal Institute of NYU. In recognition to his accomplishments, he spent 5 years in a Cosmetic Dentistry in NYC as an associate Doctor to Dr. Jeffrey Dorfman. His devotion to dental field in helping others achieve and maintain the best possible results has led to many other proficient skills including aesthetic, restorative, periodontic, endodontic, pedodontic, orthodontic (Invisalign),implant, denture, and oral surgery. After many years of mastering, he remains consistent in striving to meet every expectation with complete entrust. He’s enhanced dental work results in hand with aesthetics offering dental health and beauty. Dr. Kim continues forward to pursue further education to accelerate in unlimited knowledge within his comprehensive work. Dr. Kim is a member of American Dental Association, Georgia Dental Association, and a former president for Korean American Dental Student Association at Columbia University College. He is certified in procedures such as Botox and Fillers. Dr. Paul Kim now practices in a private office in Duluth with highly trained professional staff members. Additionally, he provides modern technology and supplies in all areas including X-ray system with minimal to no radiation. He’s philosophy is to maintain the highlest levels of professional accreditation and extensive training to deliver the best care possible.

Steve Hahn

D.M.D., M.S.

Steve T. Hahn D.M.D., M.S. received his academic training in Dentistry at Boston University, and he earned a certificate of Advanced Education in General Dentistry from Columbia University College of Dental Medicine. In order to become one of a select group of highly skilled dentists with training in Advanced Prosthodontics and Implant Surgery, he went on to complete an additional specialty residency with a master's of science degree in Advanced Prosthodontics at Columbia University College of Dental Medicine, followed by an Implant Fellowship with a Surgery Specialty at New York University College of Dentistry. Until recently, Dr. Hahn's primary focus has been teaching in his areas of specialized training and skill -- prosthodontics and implants. He has served in a range of teaching positions including Director and Assistant Professor of Clinical Dentistry at Columbia University College of Dental Medicine. Over the past several years, Dr. Hahn's practice has evolved in parallel with his academic work: He now works directly with patients at his offices at the Georgia Dental Implant Center. As a doctor with a unique combination of skills, he dedicates his years of training in the maintenance of healthy teeth for his patients using the most extensive range of specialized skills and res Fources. As one of an elite number of dentists with advanced training in Prosthodontics and Implant Surgery, Dr. Hahn remains ahead of the leading edge of dental care by constantly updating his practice with the latest available technological developments in the areas of General Dentistry, Implant Surgery, and Advanced Prosthodontics. By continually setting the highest standard for himself and his staff, he assures his patients the highest quality of dental care currently available. Dr. Hahn is a member of the American College of Prosthodontists, The Academy of Osseointegration. He is currently an active member of the Omicron Kappa Upsilon Honor Society. He has formerly been an active member the American Dental Association, former member of the International Congress of Oral Implantation, and the former Advisor for the Korean American Dental Student Association at Columbia University.

Maria C. Kwak


Dr. Maria C. Kwak, DDS was born and raised in Paraguay. She received her first dental degree from the Universidad Nacionl de Asuncion in 1999. After that she received a certificate in Public Health in 2000. Upon arriving in U.S, Dr. Kwak obtained a dental degree for the second time from the competitive Advanced Standing Program for International Dentist at the University of Southern California School of Dentistry in 2009. She enjoys all phases of dentistry but specially building relationships with patients while serving to improve their oral health. As dentistry is evolving in a faster pace, Dr. Kwak is eager to improve her skills and stay up to date to better serve her patients attending continuously to dental continuing education seminars. As a matter of fact, one of her long time goals is to obtain a Mastership from the Academy of General Dentistry ! (Will need 1100 hours of credits!).
She is married with her wonderful husband of 17 years, Richard and they are blessed with two girls, who right now are just enjoying being kids.
Dr. Kwak is fluent in Spanish, Korean and English and she is humble to be able to communicate with three different cultural backgrounds. She is ready and eager to join the remarkable group of people of Georgia Dental Implant Center.
Dr. Kwak welcomes you at the Doraville, Duluth and Norcross location

Gregory S. Doneff


Dr. Doneff graduated from Creighton University School of Dentistry in Omaha Nebraska and has been practicing since 1999. He is currently a member of the Dunwoody Chamber of Commerce and numerous professional organizations including American Dental Association, Georgia Dental Association and th Northern District Dental Society. Dr. Doneff is married with three children. His hobbies are fishing, camping and family vacations

Chang Han

D.D.S, M.D

Dr. Han is Board Certified by the American Board of Oral and Maxillofacial Surgery. He received his DDS from Columbia University School of Dental and Oral Surgery and received his MD from the College of Physicians and Surgeons at Columbia University. He then completed the Residency Program in Oral and Maxillofacial Surgery at New York Presbyterian Hospital/Columbia University Medical Center.

Dr. Han received extensive training in dental implantology, facial reconstructive surgery and orthognathic/corrective jaw surgery. His interests also include dentoalveolar surgery, TMJ surgery, facial trauma and the treatment of patients with craniofacial deformities and pathology. Dr. Han served internationally for Healing the Children, a non-profit organization for treating children with cleft lips and palates.

Dr. Han is a fellow of the American Association of Oral and Maxillofacial Surgeons and is a member of the New York and New Jersey Societies of Oral and Maxillofacial Surgeons. He maintains clinical and teaching privileges at Hackensack University Medical Center and Columbia University Medical Center.