About Us

We are a group of doctors and staff who are committed to providing you and your child with a positive, comfortable and safe dental health experience. We care deeply about our patients and we treat them like family.

Founded in 1974, Pediatric Dental Associates Dental Group has served thousands of patients in the greater Boston area. Some of our doctors have been with the practice since the beginning, and have had the pleasure of seeing past pediatric patients return with their own children! We are proud of the positive, trusting relationships we have built with our patients as we strive to serve all family members from infancy through adulthood.

We are also proud of our connection to the local community. Our ties in the commmunity include the following list:

We offer comprehensive pediatric, orthodontic, general, restorative and cosmetic dentistry services. With dental offices in Reading and Winchester, Massachusetts, we serve families from towns throughout the Boston area, including Wakefield, Melrose, Stoneham, Medford, Lynnfield, North Reading, Andover, Arlington, Lexington, Bedford, Burlington, Woburn, Wilmington, Peabody, Danvers, Saugus and more.

We welcome new patients. Contact us today to schedule your appointment!

A Brief History

In November 1974, while serving as an Associate Clinical Professor of Pediatric Dentistry and Dentist-in-Chief of the Tufts Dental Facilities for Persons with Special Needs, Dr. Joseph P. O’Donnell started a part-time practice of pediatric dentistry in Winchester. The office was very small—just two dental chairs—and was only open two weekday afternoons and Saturdays. Dr. O’Donnell had one employee—a dental assistant who also served as a secretary. In early 1975, he hired his first hygienist, Bea Wheaton, who remains as a principal member of the PDA staff.

As the practice became busier, Dr. O’Donnell added a partner, Dr. Gary Warrington who had been an outstanding student in Dr. O’Donnell’s post-graduate residency program at the Tufts-New England Medical Center. At this time the practice officially became Pediatric Dental Associates of Winchester (PDA).

With the continued growth of the practice, the office moved to a new professional building in Winchester, the Russell Hill Condominiums, in 1985. The new facilities had seven operatories and offered orthodontic services in addition to pediatric dentistry. Within a short time, the demand for appointment times spurred additional growth as the office expanded into an adjoining suite and four more operatories were installed.

Over the subsequent years, the practice added several highly qualified pediatric dentists to the staff: Dr. Geraldine Garcia-Rogers, Dr. Sonia Wu and Dr. Nicole Harrington—all of whom are partners. We are also proud to say that all of our pediatric dentists are Board Certified.

In 1998 PDA expanded to a satellite location in the Reading Health Center in Reading, MA where our services include pediatric dentistry, orthodontics and adult dentistry. Dr. Shannon Duffy is also a partner and directs the orthodontic department, while Dr. Kimberly Weiss provides adult dental services.

Our practice is now PDA—the Group Dental Practice of Winchester and Reading. We are proud to say that we have more than fifty employees—part-time and full-time—many of whom have worked with us for more than twenty years. We are grateful to our patients for the tremendous support and confidence that has combined to help our practice grow. We pledge to reward your confidence by continuing to offer dental services of the highest quality in a safe, friendly and state-of-the art environment.

Meet the Staff

Pediatric Dental Associates and the Group Practice work closely together as a team. With years of experience, we have the specialized training necessary to prevent, diagnose, and treat your dental conditions. Our pediatric dental hygienists, dental assistants, and full office staff at the Reading and Winchester locations stays current on the latest advances in research and treatment so you know you'll get the most advanced dental care available anywhere.

Linda M. McKim - Practice Administrator

Linda McKim has been the Practice Administrator of the PDA Dental Group for more than fifteen years. Linda is a Magna Cum Laude graduate of Northeastern University where she earned a Bachelor of Science Degree in Business Administration. At Northeastern she was also inducted into the Golden Key National Honor Society in recognition of her outstanding scholastic achievements. Linda has proven to be an excellent leader of our multi-location and multi-specialty dental practice which has more than fifty employees. Her position requires daily coordination of our systems operations and implementation of business strategies to manage billing, personnel, marketing, accounts receivables, accounts payable and long-range planning. She is a lifetime member of the American Association of Dental Office Managers.

Linda currently resides in Wakefield, MA with her husband Bob and her two daughters Kayla and Alexa. In her free time, she enjoys spending time watching her daughters play hockey, basketball, lacrosse and volleyball.