Specialties: Crowns and Bridges Dental Implants Digital X-Rays Intraoral Camera Orthodontics Tooth Whitening Tooth-Colored Fillings Established in 1999. Greenbriar Dental Care owner Dr. Gloria Clarke is committed to using the latest technology and techniques to provide top quality dental care. Dr. Clarke who is one of the most dentists in metro Atlanta in 2014 was recognized at Citizen of the Year for her charitable giving.