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Dr. Tia Thomas

Austell Marietta Dentist

Dr. Thomas grew up in Valdosta, GA where she attended Valdosta State University graduating Magna Cum Laude. Afterwards, she attended the Medical College of Georgia where she earned her Doctorate of Dental Medicine in 2007.

Prior to joining West Cobb Smiles, Dr. Thomas practiced as an associate dentist for several years. She has resided in the Metro Atlanta area for the past seven years and is an active member of the American Dental Association, Hinman Dental Society, North Georgia Dental Society, American Orthodontic Society, and the Georgia Dental Association.

Dr. Thomas is a strong advocate of comprehensive dental care and believes teeth should not only be beautiful but healthy as well. She completes several continuing education courses each year in order to provide her patients the highest standard of care.

In her free time, Dr. Thomas enjoys spending time with family, friends, and participating in personal fitness.


Dr. Ross Levine

Dr. Ross Levine grew up nearby in Alpharetta, Georgia. He earned his undergraduate degree with highest honors from Georgia Tech, his Doctorate in Dental Medicine from the Georgia Regents University College of Dental Medicine (formerly MCG), and completed his residency in general dentistry at the University of Michigan in Ann Arbor with an emphasis on cosmetic, digital, and sports dentistry.

While attending GRU/MCG, Dr. Levine co-founded Dentists for Della, a nationally recognized oral care program for war veterans at the Georgia War Veterans Nursing Home. He also received the Geriatric Dentistry Award for excellence in knowledge and service to the geriatric population. Dr. Levine was inducted into the Alpha Upsilon Phi Honors Society for leadership and philanthropic service to the Medical College of Georgia. During his time in Ann Arbor, Dr. Levine was a team dentist for the University of Michigan Wolverines hockey team. In addition, he has been a dental screener at the Special Olympics and treasurer for the Give-A-Smile Foundation.

Dr. Levine is an active member of several dental organizations including the American Academy of Cosmetic Dentistry. Outside of dentistry, He serves on the young professional board of ORT, a non-profit that offers skills and training to impoverished communities. Dr. Levine enjoys a wide variety of hobbies including traveling, skiing, tennis, and kickball. He loves live music and is a fan of Georgia Tech football.

Dr. Diana Tonoukouin

Diana Tonoukouin, DDS, provides general dentistry services to adults, teenagers, children, and infants, which makes it convenient for the whole family to receive the dental care it needs in one place. Dr. Tonoukouin provides preventive, restorative, and cosmetic dental services including exams and cleanings, fillings, crowns, bridges, dentures, root canal therapy, and teeth whitening.

Dr. Tonoukouin earned her Doctor of Dental Surgery degree from Howard University College of Dentistry in 2009 and completed a multi-disciplinary hospital residency at Montefiore Hospital in the Bronx. The residency provided her with additional training in oral surgery, anesthesia, and treatment of medically-compromised patients. She also holds a Certificate in Dental Hygiene from University of Pittsburgh and a Bachelor of Science degree in Neurobiology and Physiology from University of Maryland.

Dr. Tonoukouin is a member of the American Dental Association, Georgia Dental Association, Georgia Dental society, American Academy of Facial Esthetics and is fluent in English, French, and Spanish. She looks forward to getting to know you and helping you have the smile you desire.


  • Doctor of Dental Surgery (DDS), Howard University College of Dentistry
  • Certificate in Dental Hygiene, University of Pittsburgh School of Dental Medicine
  • S. Neurobiology and Physiology, University of Maryland


  • American Dental Association, Georgia Dental Association, Georgia Dental Society
  • Omicron Kappa Upsilon