Learn About Us As leading periodontist in Leesburg, Gainesville, and Sterling, VA, Dr. Kharmouche, Dr. Hardison, Dr. Hasan, and our staff are committed to addressing each individual patient with a customized treatment plan. Whether you are displeased with the appearance or function of your mouth, we use the newest and most innovative technologies to correct these problems. Our main goal is to enhance patient comfort while still providing reliable long term results. When you visit Dr. Kharmouche, Dr. Hardison and Dr. Hasan you can expect to receive such treatments as dental implants and the All-On-4TM.