Dr. David E. Mastrota, D.M.D, PA

Dr. Mastrota has been practicing family dentistry in Wilmington since 1992. He is a 1981 graduate of St. Mark’s High School and a 1985 graduate of Elizabethtown College. Dr Mastrota graduated from Temple School of Dentistry in 1991 and completed his General Practice Residency at Christiana Medical Center. He began practicing in 1992 opening his practice at 2215 Pennsylvania Ave in 1995. The practice was then named Great Whites Dental. Most recently Dr. Mastrota furthered his education attending dental school at The Dawson Academy and The Pankey Institute.
Dr. Mastrota is a member of Delaware State Dental Society, The American Dental Association, and The Academy of General Dentistry. He attends New Castle Dental Study Club and First State Implant Study Group regularly. He participates in over 100 continuing education hours every year, in addition to time spent volunteering at local institutions including The Nemours Dental Clinic and Delaware Technical Community College’s Give Kid’s a Smile Day. Born and raised in the City of Wilmington, Dr. Mastrota has a strong connection with the community. Dr. Mastrota and his wife Karyn, have two children, Saige and Makenna, and three crazy dogs.


Liz Allen, RDH Dental Hygienist

Liz is a native Delawarean, born and raised in Wilmington where she resides with her husband and son. She has worked in the dental field for 20 years having started out as a dental assistant. Liz graduated Cum Laude from Delaware Tech and has been a dental hygienist at Dr. Mastrota’s since 2006. Liz is an avid bowler who also enjoys fishing with her son and husband. She is very personable and eager to make you feel comfortable at our office. If you have any questions or concerns, please don’t hesitate to ask her!


Denise Sherwood, CDA

Denise is a Delaware native. She and her husband Jeff have three grown children and reside in New Castle. Denise brings to our dental team over 30 years of dental experience. She is a Delaware Tech graduate and maintains her National Certification in Dental Assisting.



Dana joined Dr. Mastrota and his staff in February of 2011. She grew up in Delaware and lived there until she married and moved to Pennsylvania 26 years ago. Prior to working at Great Whites Dental, Dana was a stay at home mom and book keeper for her family’s business. “I love the people I work with and am eager to make our patients feel welcome.”



Landa joined Dr. Mastrota’s staff in 2013 after graduating from Harris School of Business’s dental assisting program. I am a “busy” mom of twin boys and a school aged daughter. I strive to be great at all I do while keeping a humble and passionate attitude. I enjoy reading and shopping in my spare time.



Jessica joined our dental team in January 2016. I am a born and raised Delawarean. I have proudly served in the US Naval Reserve since 2012. I started my career in dental assisting after completing my basic training in 2013. I am currently continuing my education at Delaware Technical and Community College pursuing a degree in dental hygiene.


Refer a Friend to our office and you and your friend will each receive a $25.00 credit towards services.