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Meet The Team

Our Doctors

Dr. Robert F. Morrison

CEO and Clinical Director

Dr. Morrison is the owner and founder of Robert F. Morrison, DMD, PC, a General Williamsburg Dentist Practice for children and adults since 1992.

Dr. Morrison founded the practice after returning from being stationed with the U.S. Navy in England with the goal of providing genuine and compassionate care for the families of Williamsburg and the greater Hampton-Roads area.

The practice has grown to incorporate some of the latest dental technologies as well as continue to provide extensive and patient-oriented care for families and individuals. With a great team of Williamsburg dentists and staff, the offices of Morrison Dental Group pride themselves on the personal attention and skill that they can offer their patients. Dr. Morrison graduated from Southern Illinois University with a Bachelor of Science degree in Chemistry in 1979. He attended Southern Illinois University School of Dental Medicine, graduating in 1982, completing a post-doctoral residency in Comprehensive Dentistry. He served as a dental officer ashore and afloat from 1982-1991 in the U.S. Navy and was the dentistry department head afloat the U.S.S. Guam. Dr. Morrison was head of the Pediatric Department from 1987-1988, Dental Clinic, Norfolk Naval Station, Norfolk, Virginia.

Dr. Morrison is married to Alison, who serves as Morrison Dental Group’s CFO. They have two sons: Frank, a LCDR in the United States Coast Guard and Alex, who also works with Morrison Dental Group as the Chief Compliance Officer. In his spare time, Dr. Morrison is a dedicated family man and enjoys fishing on the Chesapeake Bay, as well as kayaking and restoring British MG cars.

Dr. Morrison is a member of the ADA, American Academy of Sleep Medicine, The VDA, the PDA, and the International College of Dentistry.

Dr. Rafael Siqueira

Dr. Rafael Siqueira is originally from Recife, a beautiful town on the coast of Brazil. He attended the University of Pernambuco in Brazil and graduated from dental school in 2010. 

He then went on to complete a Masters of Implantology which is similar to a US residency program. After completing that, he joined a PhD program at the Federal University of Pernambuco which sent him to the University of Michigan to do research for his master’s thesis. Once he completed his PhD, he headed back to Michigan School of Dentistry for a 3-year residency in Periodontics. During his time in school and residency, he was able to publish over 30 scientific articles in international peer reviewed journals and write five book chapters. This resulted in a few awards over the years. 

Dr. Siqueira’s interest in dentistry started to develop very early in his life by watching his parents who are both dentists. He observed his father teaching students and treating both students and patients with compassionate care. He witnessed a few instances where patients were moved to tears by the results of his father’s care and students whose lives were so strongly impacted by the mentorship his father provided on their path to become a Periodontist or Implantologist. Dr. Siqueira soon realized he wanted to have that same positive impact by being a dentist, educator and researcher.  

Dr. Siqueira describes himself as not only family-oriented and very sociable, but also easy-going and calm. He loves being with friends, having a good time and sharing great food. He is typically very optimistic. He is married to Renata, a lawyer, who just recently gave birth to their first child, Thomas. They do not currently have any pets but hope to add a dog to their family in the near future. Dr. Siqueira is a big sports fan, food lover and loves to travel. His hobbies include playing tennis, watching sports, exploring new restaurants, travelling and meeting new people, and learning new languages. A fun fact about Dr. Siqueira is that he speaks his native language, Portuguese, as well as English, Italian, and can communicate quite well in Spanish. He is currently taking a Spanish course to improve his fluency.

Dr. Katherine Powell

Dr. Katherine Powell was first drawn to the field of dentistry in high school, when she had the opportunity to work in a dental office as an office assistant. It was during that time that she decided that dentistry was the career for her and hasn’t looked back! Each day, she looks forward to helping her patients improve their oral health and get the smile they always wanted.

After growing up in northern Virginia, Dr. Powell attended the University of Virginia, where she earned her Bachelor of Science degree in chemistry. She continued on to New York University College of Dentistry, earning her Doctorate of Dental Surgery. The following year, she completed an Advanced Education in General Dentistry (AEGD) residency at Virginia Commonwealth University School of Dentistry. Upon completion of her training, she cared for patients in private practice in Connecticut. Each year, she completes a range of continuing education courses encompassing a variety of aspects of dentistry to uphold her commitment to providing the finest care for her patients.

Outside of the office, Dr. Powell enjoys baking and watching college basketball. She and her husband have a young daughter, Emma. Dr. Powell and her husband enjoy hiking, visiting different national parks, and finding outdoor adventures where Emma can join!

Dr. Nida Ali

Dr. Nida Ali was born and raised in Pakistan where she attended college and studied medical science. She was drawn to dentistry because most of her family members are dentists. She has a passion for working with people in the healthcare field.

In 2008, she volunteered as a medical professional for a local clinic because she loves health care and everything about it. Her favorite part of dentistry is cosmetic procedures; she loves to be able to enhance a person’s smile. Dr. Ali takes great pride in watching transformations and how a person’s life can be changed with something simple but so important — a beautiful smile. 

Dr. Ali is happily married. Her husband is also a dentist and together they have a beautiful 13-month-old little girl named Ayzal. Dr. Ali is a family-oriented person who loves traveling, good food, reading, and being outside. A fun fact about Dr. Ali is that she is an exceptional cook!

Dr. Turriago

Dr. Turriago was born and raised in Columbia. Dr. Turriago is the first member of his family to become a doctor.

Dr. Turriago went to dental school at the University of Columbia and then came to the United States and did a residency at Northside Medical Center in Ohio for two years. What he likes most about dentistry is surgery. He also enjoys creating dentures and partials to help completely transform someone’s smile. 

Dr. Turriago describes himself as a humble, passionate, easy-going, and hard-working person. The things he loves to do in his spare time include watching movies and finding good food in the area. He also loves to travel! One of his favorite places he has visited is Punta Cana. A fun fact about Dr.Turriago is that he speaks two languages: Spanish and English.

Dr. Turriago has two sons, Julian and Christian, who both live in Florida. He also has a four-legged fur baby, a chow chow, named Tsuki.

Our Staff

Priscilla Hansen

Regional Manager

Priscilla Hansen joined Morrison Dental Group in 2013 as an office coordinator after spending 10 years working in Human Resources. She was born in Panama to military parents and grew up in rural Pennsylvania.

She moved to Williamsburg in 2012 due to her husband being stationed at Ft. Eustis. After spending four years as an office coordinator, she became a Regional Manager for our south side offices. Priscilla most enjoys the dental field because of how much she cares for our patients. She loves being a part of their emotional journey as they come into the office in pain and leave with instant gratification. In her spare time, Priscilla enjoys spending time with her family and cheering on Penn State. She is most proud of the time she is able to give back to the community volunteering for things such as Girl Scouts, Smiles for Heroes, and many more!

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