Proudly Serving Grand Isle, Madawaska, Frenchville, St. Agatha & Sinclair, Maine

St. John Valley Chamber ofCommerce & Tourism

NorState Federal Credit Union
Dead River Company

309 St. Thomas Street

Madawaska, Maine 04756

​(one day a month)


PO Box 733

Presque Isle, Maine 04769

Madawaska Office Phone: (207) 728-4223

Presque Isle Office Phone: (207) 762-7881

Fax: (207) 762-6086


Blackstone Orthodontics, where we work as a team to help patients achieve and maintain beautiful, functional smiles. We are committed to working with you and your family to provide a comfortable experience and create smiles that last a lifetime. At Gregory M Blackstone DDS, our priority is to deliver quality care to informed patients in a comfortable and convenient setting.

With a focus on orthodontics for children, teens, and adults, Blackstone Orthodontics specializes in providing outstanding state-of-the-art orthodontic care for the entire family in a caring, patient-centered environment. We recognize that every patient has different needs, and we pride ourselves in the courteous service we deliver to each person who walks through the doors.

Our doctor has completed extensive training in the field of orthodontics and still pursues continuing education to stay abreast of the latest techniques and treatments. What sets us apart from others is the personalized care we provide our patients. We also make it a priority to educate our patients about their treatment options and other dental issues.

We invite you to explore our Website to learn more about our team, our office and orthodontic treatment. You’ll find all of the information you need to make informed decisions about your dental health.

Blackstone Orthodontics strives to give you the best and most memorable orthodontic experience and we look forward to caring for you and your family.

Satellite Office Location: Madawaska, Maine
Every 3rd Tuesday 8:10 AM - 4:00 PM

Gregory M. Blackstone, D.D.S.