Pediatric Dental Associates

The doctors at Pediatric Dental Associates and the Group Practice have years of experience and have the specialized training necessary to prevent, diagnose, and treat your dental conditions. They stay current on the latest advances in research and treatment so you know you’ll get the most advanced care available anywhere. Click on the links below to meet our talented specialists.
Pediatric Dentists
Orthodontists
General Dentist

Pediatric Dentists

Joseph P. O’Donnell, DMD, MS
Dr. Joseph P. O’Donnell is a graduate of the University of Pittsburgh and the University of Pittsburgh School of Dental Medicine. Following his graduation from dental school, Dr. O’Donnell completed his specialty training in pediatric dentistry at the Tufts–New England Medical Center and Tufts University where he received his Master’s Degree and was inducted into Omicron Kappa Upsilon, the National Dental Honor Society, and Sigma Xi, the honorary research society.

Dr. O’Donnell is a Diplomate of the American Board of Pediatric Dentistry, a Fellow of the International College of Dentists, and a Fellow of the American Academy of Pediatric Dentistry. He is also a past president of the College of Diplomates of the American Board of Pediatric Dentistry. In addition to his practice in Winchester and Reading, Dr. O’Donnell has served as Chief of Pediatric Dentistry at the Tufts–New England Medical Center and Dentist in Chief of the Tufts Dental Facilities for persons with special needs. Dr. O’Donnell is also an Associate Clinical Professor of Pediatric Dentistry at Tufts University School of Dental Medicine.

Gary Warrington, DMD
A graduate of the University of Maine, Dr. Gary Warrington completed his dental school education at Tufts University School of Dental Medicine where he graduated magna cum laude. He also received awards for clinical achievement in both Pediatric Dentistry and Endodontics and was inducted into Omicron Kappa Upsilon, the National Dental Honor Society. Following his graduation from Tufts, he completed a two-year residency in pediatric dentistry at the Tufts-New England Medical Center.

In addition to all aspects of pediatric and adolescent dentistry, this program offered experience in hospital pediatric dentistry, dental care of medically compromised children and behavior management techniques. Dr. Warrington is a Diplomate of the American Board of Pediatric Dentistry, a Fellow of the American Academy of Pediatric Dentistry and past president of the Massachusetts Academy of Pediatric Dentistry. In addition to his practice in Winchester and Reading, Dr. Warrington has a faculty appointment as a pediatric dentist at Tufts and is a staff member of the Tufts Dental Facilities for persons with special needs.

Geraldine C. Garcia-Rogers, DMD, MS
Dr. Geraldine Garcia-Rogers, fondly known as “Dr. Gigi,” is a graduate of Villanova University and Tufts University School of Dental Medicine. Following her graduation from Tufts, she completed her specialty training in pediatric dentistry and earned her Masters of Science degree from the University of Michigan-Ann Arbor. Dr. Gigi is a Diplomate of the American Board of Pediatric Dentistry, a Fellow of the American Academy of Pediatric Dentistry and a member of both the American Dental Association and Massachusetts Dental Society.

She has hospital affiliations with the Franciscan Children’s Hospital and Rehabilitation Center in Brighton, Massachusetts and the Massachusetts Hospital School for Children with Special Needs in Canton, Massachusetts. Dr. Gigi also served on the Board of Directors of Project Stretch, Inc., a non-profit international dental outreach organization and the Reading Rotary Club.

Click here for free tips from Dr. Gigi.

Sonia J. Wu, DMD
Dr. Sonia J. Wu is a graduate of Cornell University where she received her Bachelor of Science degree. She received her dental degree from the University of Pennsylvania School of Dental Medicine. Following her graduation from dental school, Dr. Wu completed a two-year residency program in pediatric dentistry at the Lutheran Medical Center in Brooklyn, New York. While in New York, Dr. Wu also served as a Clinical Instructor in Pediatric Dentistry at New York University.

Dr. Wu has been active in community service projects, having provided dental education and screening for children of underserved communities and Headstart, and has worked with the Special Smiles program of the Special Olympics. Dr. Wu has also made a research presentation to the Annual Meeting of the American Academy of Pediatric Dentistry and is a member of that organization. She is also a member of the American Dental Association.

Nicole (Cuff) Harrington, DMD
Dr. Nicole (Cuff) Harrington is a graduate of Stonehill College where she earned her Bachelor of Science degree with a major in Biology. She received her dental degree from Tufts University School of Dental Medicine. While at Tufts, Dr. Harrington participated in oral hygiene education to high-risk children at Franciscan Children’s Hospital and served as a member of the Tufts Smile Squad.

During dental school, Dr. Harrington also earned Tufts Merit Scholarships for outstanding academic performance and received the senior award for Clinical Excellence in Pediatric Dentistry. Upon graduation from dental school, her academic honors included magna cum laude and induction into Omicron Kappa Upsilon, the National Dental Honor Society. Dr. Harrington completed her residency in pediatric dentistry at the University of Connecticut School Of Dental Medicine. She is a member of the American Academy of Pediatric Dentistry and the American Dental Association.

Orthodontists

Christian J. Meyer, DMD, DMSc Dr. Christian J. Meyer is a cum laude graduate of the University of California Santa Barbara and a magna cum laude graduate of the Harvard School of Dental Medicine. Additionally, he completed his orthodontic training at Harvard, and received a second doctoral degree in the field of cell biology for research conducted at Children’s Hospital.

His findings are published in the highest level scientific journals such as Nature, and his body of work has advanced scientific views on the effect of mechanical forces on human cells and tissues directly related to clinical orthodontics. Upon graduation from his orthodontic residency, Dr. Meyer was honored with the highest awards for clinical proficiency and scientific research. This was the first time Harvard had bestowed these academic honors to the same individual. Dr. Meyer is a member of the American Dental Association, the American Association of Orthodontics, the International Association of Dental Research and Omicron Kappa Upsilon, the National Dental Honor Society. His interests include woodworking, surfing, saltwater fishing, and mountain biking.

Shannon L. Duffy, DMD Dr. Shannon L. Duffy is a graduate of Brandeis University where she majored in Biology and was a member of the varsity women’s basketball team. She received her Doctor of Dental Medicine degree from the University of Connecticut and was inducted into Omicron Kappa Upsilon, the National Dental Honor Society. Dr. Duffy completed her three year post-graduate training in orthodontics at Stony Brook University in New York.

Dr. Duffy conducted research at Stony Brook and the Beth Israel Deaconess Medical Center and her work was published in scientific journals. She is a member of the American Dental Association, the American Association of Orthodontists, the Massachusetts Dental Society and is a Diplomate of the American Board of Orthodontics.

General Dentist

Kallen K. Hull, DMD Dr. Hull is a graduate of Utah State University where he received his Bachelor of Science degree. He received his dental degree from Tufts University School of Dental Medicine where he was a Tufts Merit Scholarship Recipient and a member of Omicron Kappa Upsilon, the National Dental Honor Society. Dr. Hull subsequently completed a one-year General Practice Residency program at Tufts and received training in the management of special needs individuals as well as hospitalized dental patients.

In addition to his private practice, Dr. Hull is a Clinical Instructor in the Department of Restorative Dentistry at Tufts. Dr. Hull is a member of the American Dental Association, the Massachusetts Dental Society, and the American Academy of Hospital Dentists.