Meet Dr. Nicholas J. DiNinno Jr., D.M.D.
Family Dentist in Fitchburg, MA

Dr. DiNinno is committed to a lifetime of learning and continuing education. He has studied advanced procedures in restorative dentistry, cosmetic dentistry, implants and orthodontics. His particular fields of interest include dental implants and cosmetic dentistry.
- Resides in Leominster
- Graduated from Leominster High School in 1971.
- Graduated from Fitchburg State College in 1975.
- Graduated from Tufts University School of Dental Medicine in 1978.
- Advanced education in orthodontics and orthopedics from The United States Dental Institute in 1978.
- Advanced education in Invisalign.
He is a current member of the American Dental Association, Massachusetts Dental Society, Wachusett District Dental Society, American Orthodontic Society and the North Central Mass Chamber of Commerce.
His personal interests include spending time with his family, the outdoors, skiing, golf, tennis, fitness and playing the guitar.
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Recent Patient Testimonials
DiNinno Family Dental
Patient Review By Nicole G
One of my top front teeth was in need of a crown. My teeth have quite a bit of variation in color, so I was a bit worried about making it look authentic. Dr. DiNinno did an excellent job matching the varied color and tone of my tooth. It's definitely hard to tell which tooth is the crown! In addition, Dr. DiNinno and Maggie were always friendly, helpful, and considerate when working with me.
- Nicole G
Patient Review By Steven S
I can trust them! The shoot straight with me. They welcomed me to stay in the room with my child and brought in a comfy chair, all the while teaching me what they were doing and answering my many questions. They made me and my child feel extremely at ease and at home. Thanks!! We love you.
- Steven S
Patient Review By Jessica L
We love DiNinno Family Dental. The whole staff is friendly and accommodating and we are always very happy with the work done.
- Jessica L
Patient Review By Benedicta F
They are the best out here
- Benedicta F
Patient Review By joe ardagna
DR dininno and his staff were professional and curtios would highly recomend them to any one i had the inviiline braces i have a great smile now get a lot compliments thank you doctor dininno
- joe ardagna
Patient Review By Annie S
My dental journey has been long and frustrating. After being born with a defect causing me to not have 13 of my adult teeth, I've bared 6 years of braces, many consultations with oral surgeons, 2 orthodontists, a bone graft, and a year and a half of invisalign. I am happy to announce that I have finally gotten my dental implants! Dr. DiNinno and his team at DiNinno Family Dental have made me beyond happy and speechless in so many ways, because I have been so insecure about my smile my entire life. After 23 years, I am going to have to train my face muscles to smile with my teeth now! If you're on the market for a new dentist or orthodontist, I highly recommend DiNinno!!
- Annie S
Patient Review By Angela T
I became a patient for Invisalign, and now I am a patient for life. My smile has never been brighter and straighter. The entire staff is very friendly and professional.
- Angela T