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If you need an exceptional Orthodontist, look no further than Dr. John Nista and his team at Greeley and Nista Orthodontics. This expert team provides braces, Invisalign, and lifetime retainers to children and adults across two locations in Delaware. This team loves what they do and do it in a way that nobody else does!



74 Omega Dr D,

Newark, DE 19713

(302) 292 1552

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Dr. John Nista

With over 25 years of experience, Dr. John Nista has tremendous passion for orthodontics and the patients he serves. He views his practice like one big happy family!


Dr. Nista’s personal interests include golf, fishing, skiing and cooking. He is an active member of the Knights of Columbus and is currently participating in Creative Mentoring. He, too, is a past President of the Delaware State Dental Society. Dr. Nista is married with two children, Jason and Sarah. Being the oldest of five children, he particularly enjoys working with young children.


Dr. Nista attended dental school at the University of Pittsburgh, completed a General Practice Residency at the Veterans Administration in Dayton, Ohio and completed his orthodontic training at Albert Einstein Medical Center in Philadelphia. He has had extensive training in surgical jaw procedures. Dr. Nista joined Dr. Greeley in 1990 and a special relationship was born!