Our Doctor

RTHiller_cropDr. Dennis C. Hiller started his first specialty of orthodontics practices in Conway and Berlin in 1983. Over the past three decades, he has opened practices in the communities of Littleton, Laconia, Wolfeboro, Plymouth and St. Johnsbury, VT. Dr. Hiller is passionate about his work and is known for his wonderful sense of humor, quality treatment and warm personality.

“The most rewarding part about devoting my professional life to orthodontics is that I have the privilege of improving a person’s confidence and self-esteem through their new smile,” Dr. Hiller says.

He resides in Jackson, New Hampshire and enjoys being involved in his community and church and spending time with his family. Dr. Hiller also enjoys DCHiller_Wife_2015_cropgolfing, viticulture, hiking and boating.  He and his wife of 40 years, Pat, have four children -  Bryan, Matthew and wife Breanna, Kate and husband Dan, and Allison. He also has two adorable grandsons, Brayden and Tanner and three beautiful granddaughters, Payton, Abigail and Lily (thousands of pictures available!). A northern New Hampshire resident by choice, Dr. Hiller has been an involved community member serving on many boards and committees. He currently serves on the Finance Council of Our Lady of the Mountains Church, the Advisory Board for the Ham Foundation as well as the board of the North Country Investment Council.


Dr. Hiller was born and reared in Nanticoke, a small town in northeastern Pennsylvania.  He attended Rensselaer Polytechnic Institute where he earned a Bachelor of Science in Biology; Temple University School of Dentistry where he earned both a Doctor of Dental Surgery (1981) and a Master’s of Science in Dentistry and Certificate of Specialization in Orthodontics (1983).

Continuing Education

By participating in more than double the required hours, Dr. Hiller is able to stay abreast of all the developments and provide the most advanced care possible. His memberships make it possible for him to continue his education and grow in his knowledge and skill as an orthodontist. He is currently enrolled in the Master's Clinician Program with Invisalign. Dr. Hiller is a frequent lecturer to local dentists and hygienists also.

“When I receive wedding and graduation photos as well as thank-you notes from both current and past patients, it reminds me of the impact I have been able to make on their lives. And for that, I am truly grateful.” - Dr. Dennis Hiller

Our Locations

Conway, NH
127 Main, Street

Laconia, NH
394 Union Street

Littleton, NH
175 Cottage Street

Plymouth, NH
15 Town West Road

St. Johnsbury, VT
161 Western Ave

Wolfeboro, NH
270 S. Main Street