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Dr. Connie Greeley

Dr. John Nista

We were born to be Orthodontics!

We have tremendous passion for our profession and the patients we serve. We feel privileged to be part of a profession that makes such a profound difference in people’s lives. Straightening teeth is part of what we do but we also work very hard to help people enrich their overall lives. Learning and growing is a never ending process and we endeavor to live our lives as an example and inspiration to others.

We view our practice like one big happy family. We reach out to help each other and our patients in any way possible. We cherish the friendships we develop and constantly strive to encourage our patients to be the best that they can be. Our office is a warm, nurturing, fun place to be. There is no other profession we would rather be in. We love what we do! We were born to be Orthodontists!.


Family and Community

Dr. Greeley is a member of the staff of Christiana Care Health System and the A.I. DuPont Hospital for Children, where she serves on the Cleft Palate Team. Dr. Greeley has served on the Executive Board and is past president of the Delaware State Dental Society, the first female president in the history of the Society.

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. Greeley completed her dental degree at Temple University School of Dentistry and had specialty training in both pediatric dentistry and orthodontics. She was named to the Omicron Kappa Upsilon Dental Honor Society and is a Fellow of the International College of Dentistry. A native of Carbondale, PA, she has been in practice in Delaware since 1980.

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!