Innovating Beautiful Smiles with Braces and Invisalign since 1958

Your smile is our inspiration

Our top priority is providing you the highest quality of orthodontic care in a friendly, comfortable environment! We utilize the latest technological advances in orthodontics, including The Damon System self-ligating brackets – braces that can significantly shorten your treatment time – and Invisalign for a bracket free, virtually invisible way to straighten your teeth. By combining these with our advanced imaging systems, we ensure that you receive the best care possible.

About Us

eight years running

Top Docs

Dr. O’Leary and Dr. Hack have been voted Top Orthodontists in CT by their peers in Connecticut Magazine every year from 2008–2016.

Meet the Doctors

What's Happening

July 12, 2017

Blood Drive

OASECT is committed to serving the health needs of our surrounding communities. In an effort to ensure there is an adequate blood supply in southeastern CT this summer, we are sponsoring blood drive with the American Red Cross. The blood drive will take place at our Waterford office on Friday, August 4th, from 11:00-4:30. If […]

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June 05, 2017

Complimentary Photo Days

SAY CHEESE!  Professional photographer, Brenda De Los Santos of Brenda De Los Santos Photography will be available for 5-10 minute complimentary photo sessions throughout the summer and fall- no appointment necessary! Photos from the session are professionally edited and sent to each patient at home. Digital files will also be available to download for personal use. Groton: […]

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May 17, 2017

2017 Summer Magnet Contest

Make sure you have an OASECT magnet on your car because we’re giving away awesome prizes all summer! You could win a stand-up paddleboard in June and July, and a fun night out with your friends in August – including dinner at Pizza Works in Old Saybrook, mini golf at Saybrook Point Mini Golf, and limo service! […]

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