Starkey Road Office 540-989-0112 • Hershberger Road Office 540-366-8325

Meet Our Doctors

Dr. Rob Semtner has been practicing dentistry with his wife Dr. Mona Semtner in Roanoke since 2005. He grew up in Blackstone, VA attending Nottoway High School. He attended Virginia Tech and earned a B. S. in Biology. While attending Virginia Tech, he was a co-op student with the Natural Resources Conservation Service and it was during this time that he became interested in dentistry. Dr. Semtner suffered from a genetic defect that resulted in 15 congenitally missing teeth and poor growth of his bones in his mouth. 7 years of orthodontic treatment, surgery to break and realign his top and bottom jaws, placement of dental implants and crowns followed. “There are very few things in dentistry that I have not been through as a patient and I think that allows me to be more caring as a dentist. I feel I have a unique perspective since I have been through so much as a patient.”

Following Virginia Tech, Dr. Semtner began his dental training at Virginia Commonwealth University / Medical College of Virginia, School of Dentistry. He graduated with honors and numerous awards in May 2000. He then continued his training by completing an Advanced Education in General Dentistry (AEGD) program at Naval Dental Center Mid-Atlantic in Norfolk, VA with the United States Navy where he earned the Director’s Award for Clinical Excellence. In 2003 he was presented a Navy and Marine Corps Commendation Medal for his service as Dental Department Head aboard the USS Seattle (AOE-3). Following his service in the US Navy, Dr. Semtner left active duty and entered into private practice. He has pursued advanced training in a broad array of dental services including Laser dentistry, Implant dentistry, Invisalign, CAD-CAM dentistry, Dental Sleep Medicine, Complex cosmetic and restorative dentistry, Periodontal plastic surgery, and Esthetic Dentistry.

Dr. Semtner is currently a member of the Air Force Reserve where he serves as Dental OIC for the 440th Airlift Wing. Away from the office, Dr. Rob Semtner is a husband to Dr. Mona Semtner, a father to two wonderful boys and two beautiful girls, a coach of t-ball, baseball, and basketball teams, and a player for his church and a town league softball team. He has volunteered at the Mission of Mercy project since he began practicing in Roanoke. He and Dr. Mona are fans of Big Band music and swing dance wherever they have the opportunity.


Dr. Mona Semtner has been practicing dentistry with her husband Dr. Rob Semtner in Roanoke since 2005. She grew up in Richmond, VA attending St. Gertrude High School. She attended William and Mary and earned a B. S. in Biology. Following William and Mary, Dr. Semtner began her dental training at Virginia Commonwealth University / Medical College of Virginia, School of Dentistry. She graduated with honors and numerous awards in June 2000. She entered private practice while her husband served in the US Navy. She has pursued advanced training in a broad array of dental services including Laser dentistry, Implant dentistry, CAD-CAM dentistry, Complex cosmetic and restorative dentistry, and Esthetic Dentistry.

Away from the office, Dr. Mona Semtner is a wife to Dr. Rob Semtner, a mother to two wonderful boys and two beautiful girls, a children’s choir director at church, and loves to cook. She volunteers regularly at the Free Clinic of The New River Valley. She and Dr. Rob Semtner are fans of Big Band music and swing dance wherever they have the opportunity.


Dr Carter Tate graduated in 2008 from Virginia Tech with a degree in Biology. After completion of his bachelors degree, he attended dental school at the Virginia Commonwealth University in Richmond, Virginia. Upon completion of dental school, he attended a 2 year resident program in general dentistry at Wake Forest Baptist Hospital in North Carolina. Dr Tate was working as a general Dentist in Christiansburg Virginia, when the opportunity arose to practice dentistry in his home town of Roanoke VA, at Semtner Dental. Dr Tate is happy to be back in the Roanoke Valley working and living. In his spare time he enjoys spending time with his wife, cheering for the Hokies, and volunteering in the community.


Dr. Dima Zakhour graduated in 2007 from Damascus University of Dentistry in Damascus, Syria. Since then she has practiced dentistry in her own dental practice as well as being a part time associate with both of her parents in their own practices. During her time in Damascus, Dr. Zakhour volunteered her time for The Greek Orthodox Church providing dental care for children and adults who could not afford dental treatments.

In 2017, after getting married to Dr. Carter Tate and moving to the United States, Dr. Zakhour finished an Advanced Education in General Dentistry program at NOVA Southeastern University , Florida. That program included compressive and cosmetic dental procedures as well as treating adults with special needs.

Outside of work, Dr. Zakhour enjoys reading, playing the piano, painting, swimming, and working out with her husband as well as hiking in her favorite spot; McAfee Knob.