Call Us

(301) 441-8686

Opening Hours

Tues-Fri: 8:00 A.M - 4:30 PM

Request an Appointment

Request your appointment with us today!

Call Us

(301) 441-8686

Opening Hours

Tues-Fri: 8:00 A.M - 4:30 PM

Request an Appointment

Request your appointment with us today!

Our Staff

Dr. John Powers
Dentist

Dr. Powers has been practicing dentistry for more than 30 years. After graduating from the University of Massachusetts at Amherst, he attended the University Of Pennsylvania School Of Dental Medicine, receiving his dental degree in 1980. After a general practice dental residency, Dr. Powers began practicing in Greenbelt, Maryland in 1981.

Patients love Dr. Powers' empathetic and compassionate dental care. In addition, they appreciate his desire to expand and advance his dental expertise. He frequently attends courses on Oral-Systemic Health, Laser Dentistry, Smile Design, Invisalign, Ultimate Occlusion, Sedation Dentistry Oral Cancer detection and prevention. Thus, he's able to empower his patients with an array of treatment options.

Dr. Mary Alexander
Periodontist

Dr. Mary Alexander, periodontist, obtained a Bachelor of Science degree in Biology from the University of South Carolina and continued her education in dentistry at the University of Maryland School of Dental Surgery where she received her DDS degree. Prior to and during her dental studies, Dr. Alexander received funding and support from the National Institutes of Dental Research for her involvement in the periodontal research.

After obtaining her DDS degree Dr. Alexander spent one year at the Veteran's Administration Hospital, in general practice residency focusing her training in the area of anxiety patient management. She then attended Harvard University and earned her clinical specialty in periodontics and a doctorate in medical science. Her doctoral research was focused in the study of bone function and metabolic disease of the bone.

Dr. Alexander received extensive training in dental implantology, periodontal plastic surgery, bone regenerative procedures and sedation dentistry. All aspects of Dr. Alexander's training are incorporated in her periodontal practice assuring patient's thorough and comprehensive periodontal treatment.

Terrie Deters
Office Administrator

Terrie is our business office administrator. Her dental experience spans four decades as a certified dental assistant, consultant and business office manager. She enjoys working with patients to help them achieve their dental journey and continuing her education keeping dentistry her career passion.

Outside of the dental office, Terrie enjoys gardening, pool time, a sunny beach and sleepovers with her grandchildren. She has been married to her best friend, Dan for 43+ years. Together they have enjoyed the blessings of their two grown children, their spouses, six grandchildren and the continued fun times with their elderly parents. Terrie also enjoys her large Italian-German family and can always be found preparing for a family event. Quiet time seldom exists for this happy grandmother as her grandchildren light up her world.

Sonai (Sunny) Roy
Office Administrator

Sonai is the newest addition to our practice with over 17 years of experience in customer service and 2+ years in the dental health care field. As the scheduling coordinator/ social media administrator in our practice, she takes great pride and joy in getting to know our patients. The care and well being of our patients is her highest priority.  She is extremely happy to take part in giving them a great dental experience.

Sonai is the youngest of 6 siblings! Coming from a military family she has no problems making friends wherever she goes. Sonai currently resides in DC.  She loves to play “tourist” in DC and find events to do with her family. She prides herself on finding great deals and being thrifty. She is a lover of life! Her alias “Sunny “ completely embodies her bright personality.

Barbara Sherry
Registered Dental Hygienist

Barbara has been a practicing dental hygienist for  36 years. She started her career in dentistry as a certified dental assistant and after several years decided to further her education and attended Allegany Community College where she earned her dental hygiene degree. 

Barbara and Dr. Powers have been working together over 26 years. She prides herself with providing quality individualized oral health care to each of her patients, all with a gentle touch. Currently, Barbara works two Fridays a month and when needed to provide support for others in the practice.

Barbara has been married to her husband for 32 years. She loves playing tennis, yoga, and spending time with her daughter, son-in-law, grand puppy, and two other sons.

Janet Freitag
Registered Dental Hygienist

Janet brings our dental team a vast amount of clinical experience spanning over 40 years, starting with assisting at her father's dental practice. She works primarily as a dental hygienist earning her degree from Allegany College but you might also see her assisting Dr. Powers or working the front desk.

She has been a Dental Hygiene "Lead" for Mission of Mercy (a free dental clinic held at the University of Maryland) for the last 8 years.

Janet keeps her fingers limber with quilting (Even making a quilt for Mission of Mercy that was raffled off). In addition, come springtime, you can find her digging in her flower and vegetable garden. 

She and her husband Bernie, have one daughter, Holly and a brand new son in law, Steven. They enjoy family time together camping and attending music festivals.

 

Debbie Swingle
Registered Dental Assistant

Debbie, a registered dental assistant, since 1986 and has been working with Dr. Powers since 1995. She has a great wealth of dental information to draw on. Debbie is a true caregiver, in every sense of the word. Being very patient-oriented, she ensures that all of our patients are comfortable and given the best care available. She takes great pride in what she does.

Debbie is a native Marylander. She is married with four grown children. Debbie enjoys camping, gardening, scrap-booking and caring for others. Above all, she loves her 11 grandchildren, including a set of twins.