Welcome to MacDonnell Anesthesiology/Ambulatory Dental Anesthesia Associates, LLC


Sedation/Anesthesiology for Dentistry:

Dr. William (Bill) MacDonnell, a dentist anesthesiologist, has been working with dentists and dental specialists to provided dental patients dental care in a relaxed and comfortable state. Dr. MacDonnell provides your sedation/anesthesia (conscious sedation, IV sedation, deep sedation and general anesthesia) in your dentist’s office.

This website provides you with an overview of our practice and dental anesthesiology. As you navigate the site you’ll find information about MacDonnell Anesthesiology / Ambulatory Dental Anesthesia Associates, LLC, Dr. MacDonnell, appointment scheduling, etc. Our staff is dedicated to your comfort and prompt attention as well. Dr. MacDonnell works with dentists and dental specialists in both Connecticut and Western Massachusetts.  Please browse the site at your convenience and feel free to contact us at 860-561-1233 if you have any questions.

You will find our medical history, pre-operative instructions, post-operative instructions, and informed consent forms can be easily downloaded from the website.

You will find valuable information on the web site about dental anesthesia/sedation. Dr. MacDonnell believes informed patients are better prepared to make decisions about their choices for dental anesthesia/sedation, health and well-being. We encourage you to review this information to help you understand any dental anesthesia concerns.

Dr. MacDonnell is listed in the Hartford Magazine "Best Dentists" for 2014, 2015, 2016, and 2017 

Dr. MacDonnell is listed in the Hartford Magazine "Top Dentists" for 2019


State Rep. Derek Slap, Dr. Carolyn Malon, Dr. Bill MacDonnell, and State Rep. Dr. William A. Petit, Jr.

Learning about the History of Horace Wells

On Sunday, October 6, Dr. William MacDonnell, Board Member of Cedar Hill Cemetery Foundation in Hartford; Dr. Sharon Gordon, Dean of the UConn School of Dental Medicine; as well as many CSDA member dentists and several UConn dental students and residents attended, "Lost in a Laughing-Gas World: Horace Wells in Fact and Fiction."

Michael Downs, author of "The Strange and True Tale of Horace Wells, Surgeon Dentist: A Novel,"discussed Wells’ tumultuous and ultimately heartbreaking life through an illustrated lecture, including selected readings from his book. Downs chronicled the saga and significance of Wells’ discovery of nitrous oxide as an anesthetic. He also discussed how he mined the gaps in the historical record to imagine the life of Horace Wells for the novel.

This lecture was presented in recognition of the 175th anniversary of the discovery of anesthesia, by Cedar Hill Cemetery Foundation and Bushnell Park Foundation presented the public lecture.