About Us

Anthony DiGregorio, DDS

Dr. DiGregorio is popularly referred to as “Dr. D”. His philosophy is to provide the best dental care in a warm, understanding environment by personally connecting with his patients. He is proud of the office’s comforting atmosphere and inviting staff members who enjoy making patients feel right at home. He is also committed to staying on top of the latest advances in technology, including same-day porcelain crowns, oral sedation, digital X-rays, soft tissue lasers and mini implants, to name a few. His goal is to help his patients achieve and maintain beautiful, healthy smiles with the use of these cutting-edge techniques, equipment and materials.

Best of all, Dr. D wants to help his patients make informed choices about their dental care. He will spend the time to get acquainted with his patients to best understand their preferences and priorities about their dental health. He does not lecture. It is just straight talk and a commitment to treat everyone with the same concern as he would give members of his family.

Dr. D is a graduate of Georgetown University Dental School and is a member of the Academy of General Dentistry and the American Academy of Cosmetic Dentistry. He has three children and enjoys gardening, cooking, home restoration, reading and volunteer work.

Click Here To See Dr. D’s Certifications

Tillman R. Sease Jr., DDS

Dr. Sease was born in Roanoke, Virginia, and raised in Prince George’s County, Maryland. By 1973, he had completed his undergraduate studies in health and physical education at Hampton University and his master’s degree in education at Northwestern University. From 1973 to 1978, Dr. Sease taught physical education and was an athletic coach in the public school system. Through the encouragement of good friends and family, Dr. Sease made the decision to pursue a lifelong aspiration. In 1978, he enrolled at Howard University Dental School and graduated in 1982. From 1982 to 1989, he practiced dentistry for the Public Health Services in Pittsburgh, Pennsylvania, and Health and Human Services for the District government.

In 1989, Dr. Sease joined The Dental Group, where he is currently a practicing partner. “My objective is to provide a wide range of cosmetic and restorative services with care, comfort and expertise, especially for those who have not sought dental treatment due to fear or embarrassment,” says Dr. Sease, “I prefer the group practice of dentistry because it allows me to stay abreast of the rapid technological advances that are developing in the field of health and dentistry. It has been most gratifying for me to offer my patients the finest dental care available.”

Ramien R. Tajick, DDS

Dr. Tajick was born in Iran and moved to the United States in the late 1970s. She received her Bachelor of Science in biology at George Mason University in 1994. In 1998, she graduated with her Doctor of Dental Surgery from Howard University College of Dentistry. A year later, she joined the professional staff at The Dental Group. Committed to providing the highest level of care to her patients, Dr. Tajick keeps abreast of the latest breakthroughs in dental technology. As an active member of the Riverdale Park Business Association, Dr. Tajick donates her time and energy to many charitable projects and fundraisers and participates in various health fairs throughout the Hyattsville/Riverdale Park area. In 2005, she was presented with the Community Humanitarian award. The entire staff of The Dental Group is proud of her passion for providing quality care and giving back to the community.

Nathaniel Bullock Jr., DDS

Dr. Nathaniel Bullock Jr. is a native Washingtonian currently living in Prince George’s County. He is a graduate of Frostburg State University, where he received his Bachelor of Science in biology in 1984. After making the decision to follow in his father’s footsteps to become a dentist, Dr. Bullock completed his graduate program at the University of Maryland Dental School, where he earned his Doctor of Dental Surgery in 1989. As a second generation dentist, Dr. Bullock is proud to be carrying on the legacy of his father.

Dr. Bullock’s accomplishments include publications on the use of laser technology in dentistry, mission tours with the Catholic Medical Mission Board to the Dominican Republic, a part-time clinical instructor position at his alma mater and being the first African American to hold the office of vice president of his alumni association. He was also a clinical instructor for the Hornbrook Group. Dr. Bullock is also an active member of the National Dental Association, the Robert T. Freeman Dental Association and the American Academy of Cosmetic Dentistry.

In his spare time, he enjoys hiking traveling and cheering on the burgundy and gold Washington Football Team with his two children, Monet and Dylan.

Dr. Bullock is passionate about communicating with his patients and providing them the gift of “happy dentistry.” One of his philosophies is that “everyone is welcome and no one is a stranger.”

Kashia Figueroa, DDS

Dr. Figueroa earned her Bachelor of Science degree from Syracuse University in 1983 and graduated from Georgetown University School of Dentistry in 1988. She has provided professional care to patients at The Dental Group for over 10 years. Her clinical expertise in management and treatment of mentally and physically challenged patients makes her an integral member of the dental hygiene department.

Our Specialists

Jamila Chase, DDS


Dr. Jamila K. Chase, a Board Certified pediatric dentist, is a native of Prince George’s County, Maryland. After graduating with honors from Delaware State University, she returned to Maryland as a high school biology and chemistry teacher, where she developed a genuine love for children. She then earned her Doctor of Dental Surgery degree from Howard University College of Dentistry in Washington, DC, after which she pursued advanced training in pediatric dentistry. Ultimately earning the position of chief resident, Dr. Chase completed her residency in 2008.

In addition to patients she treats in the office, Dr. Chase is on staff at MedStar St. Mary’s Hospital and MedStar Southern Maryland Hospital to provide rehabilitative dental services to infants, toddlers and patients with special needs. Dr. Chase is a member of the American Board of Pediatric Dentistry, Maryland Academy of Pediatric Dentists and the College of Diplomates.

Brandon Hagan, DMD


Dr. Hagan was born and raised in Louisville, Kentucky. He graduated from the University of Kentucky with a Bachelor of Science in psychology in 2007. In 2013, he graduated with his Doctor of Dental Medicine (DMD) degree from the Medical University of South Carolina, where he served as the student body/government president from 2012 to 2013 and was selected for membership in the Omicron Kappa Upsilon national dental honor society. He completed his orthodontics and dentofacial orthopedics residency in 2015 at the Medstar Washington Hospital Center.

In addition to practicing orthodontics, Dr. Hagan enjoys traveling, long-distance running, and singing classical and choral music and he is a passionate and enthusiastic University of Kentucky Wildcats fan. GO CATS!

Pratik Patel, DDS, FRCD(C)

Dr. Pratik Patel, a native of Virginia, attended Bishop Ireton High School. He graduated from The George Washington University with a Bachelor of Science in biology and a Bachelor of Arts in computer science. Dr. Patel received his Doctor of Dental Surgery (DDS) from University at Buffalo School of Dental Medicine and completed his general practice residency at Lehigh Valley Hospital in Allentown, Pennsylvania. After working as a general dentist, Dr. Patel decided to pursue further training and specialize in endodontics. He received his certificate in endodontics from Columbia University in New York City. Dr. Patel is a specialist member of the American Association of Endodontists. He is a Fellow of the Royal College of Dentists of Canada [FRCD(C)] and has specialist registration with the Royal College of Dental Surgeons of Ontario. Dr. Patel has performed pro bono work abroad in third-world countries, such as in India and Guatemala. He enjoys traveling, sports and outdoor activities. His favorite teams to watch are the Nationals, Capitals and the Washington Football Team!

Robin Pollack, DDS


Dr. Robin Pollack is a native Washingtonian. After earning her Bachelor of Science degree in microbiology from the University of Maryland-College Park, Dr. Pollack received her Doctor of Dental Surgery from the University of Maryland School of Dentistry in 1984. She went on to do her post-graduate residency in periodontics at New York University College of Dentistry, graduating in 1986 with her certificate in periodontics. Dr. Pollack practiced in New York for 13 years before returning to the Washington suburbs with her family.

Dr. Pollack stays active in both local and national dental professional organizations, through which she is continuously exposed to the latest advances in the specialized fields of periodontics and implantology. She is an active member of the American Academy of Periodontology. Based on her goal to improve and optimize your oral health through periodontal care, Dr. Pollack works with each of her patients to focus on their individual needs. Her compassionate approach to periodontal treatment and extensive clinical experience will put you at ease.

Michael J. Will, MD, DDS, FACS

Oral Surgeon

Dr. Will received his bachelor’s degree with honors from Washington and Jefferson College, his dental degree with honors from Georgetown University, and his medical degree from the University of Texas, where he was inducted into the Alpha Omega Alpha medical honor society. He completed his general surgery and oral and maxillofacial surgery training at Brooke Army Medical Center in San Antonio, Texas. Dr. Will also completed a general cosmetic surgery fellowship. He is retired from the U.S. Army with over 20 years of service as a maxillofacial and cosmetic surgeon. His final military assignment was spent as chairman, residency program director and consultant to the Surgeon General at Walter Reed Army Medical Center.

Dr. Will is the distinguished author of numerous textbook chapters and scientific articles, and he is a nationally recognized lecturer in maxillofacial and cosmetic surgery. Dr. Will established the area’s first free-standing outpatient surgery center accredited by the Accreditation Association for Ambulatory Health Care that was designed to meet the highest nationally recognized standards of care. Dr. Will is on staff at Shady Grove Adventist Hospital and Frederick Memorial Hospital.

Professional Affiliations

Meet Our Team

The team at The Dental Group is here to help our dentists in Riverdale Park, Maryland, give you the care you deserve so that you can enjoy a healthy and attractive smile. Our team members are here to welcome you to our office and are personable, friendly and engaging. But at the same time, they are skilled and talented dental professionals who can help you get the most out of every visit. Our team members speak English, Spanish and French to meet the needs of our community, and they look forward to meeting you. Call our office at 301-864-5200 today, and they will help you plan your visit.

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