About Us

Executive Committee:

Dr. Lyndsay Langston President
Lyndsay Langston, D.M.D., M.S.

Dr. Lyndsay Langston (Board Certified) received her dental degree from the Medical College of Georgia, School of Dentistry in 2005 and her Masters Degree in Science in 2009. She completed her graduate training from the United States Army Advanced Education Program in Periodontics in 2009.

"Dr. Lyndsay" joined Drs. Sugarman, Brunner, and Langston in June, 2012. Before joining us, Major Langston was Chief of Periodontics, Fort Drum, N.Y., where she was responsible for the periodontal and implant diagnosis and treatment of the 17,000 soldiers of the 10th Mountain Division of the United States Army. During her service career, she received many decorations and awards, including the Army Commendation Medal, the Army Service Ribbon, Global War on Terrorism Ribbon, and the National Defense Service Medal.

Dr. Lyndsay and her husband, Dr. Brett Langston, an Atlanta prosthodontist, are the parents of two daughters. While the girls' activities occupy most of their parents' time, the Doctors Langston do enjoy swimming, tennis and waterskiing. Dr. Lyndsay is a dedicated professional who is looking forward to meeting the many long-term patients of our office and new patients seeking periodontal and implant treatment. We are very fortunate to have her with us.

Dr. Thomas Peterson Secretary
Thomas L. Peterson, D.M.D., M.S.


  • Graduate University of Louisville Periodontal Residency, MS (2012)
  • Graduate Medical College of Georgia School of Dentistry, DMD (2009)
  • Graduate University of Georgia, B.S. Microbiology (2003)
  • Graduate Stratford Academy (1999)


  • First Place, Clinical Research Billy M. Pennel Research Competition; Southern Academy of Periodontology (2012)
  • American Academy of Periodontology dental student award for outstanding achievement in periodontics (2009)
  • American Academy of Periodontology
  • Georgia Society of Periodontists
  • Southern Academy of Periodontology
  • Academy of Osseointegration
  • ADA–American Dental Association
  • GDA–Georgia Dental Association
  • Central District Dental Society

Dr. Ranjitha Krishna Treasurer
Ranjitha Krishna, D.M.D., M.S.

Dr. Ranjitha Krishna (Board Certified) received her DMD from the Medical College of Georgia in Augusta. She completed her graduate training in Periodontics and obtained a Masters in Science degree from Indiana University in 2008. She also has a Masters in Public Health from the prestigious Rollins School of Public Health at Emory University and has previously worked at the Centers for Disease Control and Prevention (CDC). Dr. Krishna has been an Associate Professor in the department of Periodontics at The Dental College of Georgia, Augusta University (formerly known as Medical College of Georgia) since 2008, where she has been involved in the training of many dental students and periodontal residents. She joined Drs. Sugarman and Langston in January of 2016. Dr. Krishna is passionate about Periodontics and genuinely cares about the overall well being of her patients. She was awarded the ‘Outstanding Educator’ award by the American Academy of Periodontology and the ‘Excellence in Teaching’ award by the American College of Dentists and was nominated by her peers and students. She has co-authored many scientific papers and textbook chapters related to periodontics and presented in national and international meetings. Dr. Krishna and her husband Raj Garrepally have a daughter and a son. Dr. Krishna enjoys painting, pottery, traveling and spending time with family and friends.

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