Meet the Doctors

Meet Our Doctors

Experienced Dentists

Patients of Oak Ridge Family Dental are very fortunate to be in the dedicated care of 3 amazing dentists:
  • Joseph D’Onofrio, DDS 
  • Michael J. Ryan, DMD 
  • Christopher R. Merwin, DDS 
Read on to find out more about these compassionate and knowledgeable men. 

Appointments are available at our Oak Ridge and Lake Hopatcong locations. We look forward to seeing you!
Learn About Our Practice

Superior Dental Care Providers

Born and raised on Long Island, Dr. Joseph D’Onofrio has been a summer resident of Sussex County since 1950.

He earned his Bachelor of Science degree from the University of Notre Dame in 1963. The doctor graduated from Columbia University School of Dental and Oral Surgery in 1967. 

Dr. D’Onofrio is a life member of the American Dental Association, the New Jersey Dental Association, and the Tri-County Dental Association.

After completing 2 years of military service as a dentist in the Coast Guard, he opened Oak Ridge Family Dental in 1969. 

Dr. D’Onofrio and his wife Joanne have raised 3 children – Joe, Andy, and Jennifer. 

He's resided in Sparta since 1971.
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Dr. Michael J. Ryan, or as we like to call him, Dr. Mike was raised in Sparta, New Jersey. He attended Sparta High School and earned degrees from both Indiana University at Bloomington as well as Montclair State University. He then went on to get his doctorate at Medical Dentistry from U.M.D.N.J. 

After graduating dental school in 1998, Dr. Mike successfully completed a mini-residency in Implant Dentistry in 2006. In 2009 he continued his studies by completing an advanced mini-residency in Implant Dentistry.

He is a proud member of American Dental Association, New Jersey Dental Association as well as the Tri-County Dental Association. 

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Dr. Christopher R. Merwin graduated from the Ohio State University College of Dentistry in 2006. He earned a Bachelor of Arts in business economics and organizational management from the Brown University in 1991. 

Before pursuing his passion for dentistry, Dr. Merwin spent more than 10 years working in the areas of computers and management in Atlanta, GA. A native of Northern New Jersey, he decided to move back to his roots and establish his business “back home.”

Dr. Merwin is a member of the American Dental Association, the New Jersey Dental Association, and the Tri-County Dental Association. He lives in Sparta with his wife Kelley and their daughter Kenzie. He is an avid sports fan and enjoys skiing, mountain biking, hiking, and boating. Dr. Merwin cheers for the Yankees, the Giants, and Ohio State Buckeye football.

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