At Morrison Dental Group in Midlothian, VA, we believe every smile deserves personalized attention and high-quality care.
Our doctors and team combine advanced training with genuine compassion to provide comfortable, comprehensive dentistry for patients of all ages. We are proud to offer a wide range of treatments while building lasting relationships with the families we serve. Get to know the trusted providers who make your care their priority.
Our Doctors
Dr. Robert F. Morrison
CEO & Clinical Director
Dr. Robert F. Morrison is the owner and founder of Morrison Dental Group, serving families since 1992. After completing his service with the U.S. Navy, he opened the practice with a mission to provide genuine and compassionate care for the families of the Hampton Roads region. Over the years, the practice has grown to incorporate advanced dental technologies while continuing to provide patient-focused care for individuals and families.
Dr. Morrison earned his Bachelor of Science degree in chemistry from Southern Illinois University in 1979, followed by his Doctor of Dental Medicine degree in 1982 from Southern Illinois University School of Dental Medicine. He completed a post-doctoral residency in Comprehensive Dentistry and went on to serve as a dental officer ashore and afloat from 1982–1991, including as department head aboard the U.S.S. Guam and head of the Pediatric Department at Norfolk Naval Station.
Dr. Morrison is married to Alison, who serves as Morrison Dental Group’s CFO. They have two sons: Frank, a Lieutenant Commander in the U.S. Coast Guard, and Alex, who is the group’s Chief Compliance Officer. In his spare time, Dr. Morrison enjoys fishing on the Chesapeake Bay, kayaking, and restoring British MG cars. He is also a member of the ADA, American Academy of Sleep Medicine, Virginia Dental Association, Peninsula Dental Society, and the International College of Dentistry.
Dr. Rafael Siqueira
Periodontist
Originally from Recife, Brazil, Dr. Rafael Siqueira brings a strong background in research, education, and advanced dentistry to Morrison Dental Group. He earned his dental degree in 2010 from the University of Pernambuco, followed by a Master’s in Implantology. He then completed a PhD at the Federal University of Pernambuco, during which he conducted research at the University of Michigan. Later, he returned to Michigan to complete a three-year residency in periodontics.
Dr. Siqueira has published more than 30 scientific articles in international peer-reviewed journals and authored five book chapters, earning recognition for his work. His passion for dentistry was inspired by his parents, both dentists, and by observing the lasting impact his father had on patients and students. Today, Dr. Siqueira proudly carries forward that same dedication as a dentist, educator, and researcher.
Outside of work, Dr. Siqueira enjoys playing tennis, traveling, and discovering new restaurants. He is fluent in Portuguese, English, and Italian, and continues to improve his Spanish. He and his wife, Renata, a lawyer, recently welcomed their first child, Thomas, and they look forward to adding a dog to their family soon.
Dr. Katherine Powell
General Dentist
Dr. Katherine Powell first discovered her passion for dentistry in high school while working as a dental office assistant. That experience confirmed her career path and inspired her to help patients achieve healthier, more confident smiles. She looks forward to improving the lives of her patients each day through comprehensive care.
After growing up in northern Virginia, Dr. Powell attended the University of Virginia, where she earned her Bachelor of Science degree in chemistry. She went on to earn her Doctor of Dental Surgery degree from New York University College of Dentistry, followed by an Advanced Education in General Dentistry residency at Virginia Commonwealth University. She later cared for patients in private practice in Connecticut before joining Morrison Dental Group, and she continues to expand her skills through ongoing continuing education.
Outside the office, Dr. Powell enjoys baking, hiking, and watching college basketball. She and her husband enjoy visiting national parks, especially now that they can share those adventures with their young daughter, Emma.
Our Team
Priscilla Hansen
Regional Director
Priscilla Hansen joined Morrison Dental Group in 2013 as an office coordinator after a decade of experience in Human Resources. She was born in Panama to military parents and raised in rural Pennsylvania before moving to Williamsburg in 2012 when her husband was stationed at Ft Eustis.
Her dedication and leadership led her to become Regional Director for the group’s south side offices. Priscilla values being part of the patient journey, especially seeing individuals leave the office with healthier, more confident smiles.
Outside of work, she enjoys cheering for Penn State and spending time with her family. She is also passionate about giving back to the community through volunteer work with Girl Scouts, Smiles for Heroes, and other organizations.
Compassionate Care From A Trusted Team
The doctors and team at Morrison Dental Group are committed to helping patients feel comfortable and confident at every visit. From preventive care to advanced treatments, they work together to provide personalized dentistry for every smile. Families in Midlothian, VA, can rely on their expertise and compassionate approach. The team looks forward to welcoming you and helping you achieve your healthiest smile.