Meet Nicholas J. DiNinno III, D.M.D.

Family Dentist in Fitchburg, MA

Photo of Dr. Nicholas J. DiNinno III

For Dr. DiNinno, dental care is a true family tradition. He took over the practice from his father, who originally founded DiNinno Family Dental back in 1978. Growing up in Leominster and graduating from Leominster High School, Dr. DiNinno is incredibly proud to care for the smiles of the Fitchburg and Leominster communities he’s always called home.

Dr. Nick took a unique path to dentistry. He first earned a degree in Mechanical Engineering from Tufts University before staying at Tufts to graduate from the School of Dental Medicine in 2012. That engineering background gives him a unique problem-solving edge when it comes to complex dentistry. He views a smile as a perfect mix of structural engineering and art, bringing a meticulous eye for detail to cosmetic cases to ensure they look beautiful and function perfectly.

Since graduating, he has completed extensive continuing education focused on orthodontics, cosmetic dentistry, and treating complex cases. He’s also an active member of the American Dental Association (ADA) and the Alliance of Independent Dentists.

Beyond technical skill, Dr. Nick’s favorite part of the job is building trust with his patients. If you feel nervous about visiting the dentist, you’re in good hands. He excels at putting anxious patients at ease, taking the time to listen, explain things clearly, and make sure you feel completely comfortable and relaxed during your visit.

Outside the Office

When he’s not in the clinic, Dr. Nick is usually on the move. He and his wife, Mito, have four great kids, and he loves spending his free time coaching their youth sports teams. To stay active, he hits the New England slopes on his skis or takes his mountain bike out on the local trails. When it’s time to unwind, you can find him playing classical piano or sitting down for a friendly, competitive game of chess, backgammon, or cribbage.

Patient Links of Interest

Dr. DiNinno III has an interest in all aspects of dentistry and stays current on all the latest developments.

He is a current member of the American Dental Association, Massachusetts Dental Society, Wachusett District Dental Society, and the North Central Mass Chamber of Commerce.

His personal interests include spending time with his family, mountain biking, cooking, tennis, music, golf, and staying fit.

Schedule Your Care With Our Expert Dentist

Call us: 978-342-8710

Recent Patient Testimonials

DiNinno Family Dental

5 out of 5 stars based on 163 reviews

Patient Review By Nicole L

I have had a wonderful experience with Dr. Nick. Myself and both of my children have been seeing him for years. He and his team are absolutely exceptional, and I highly recommend their practice, especially for complex cases. My son, Colin, had a particularly challenging orthodontic situation, and the results achieved by Dr. Nick are truly outstanding. He approached his case with immense care and a comprehensive plan. Throughout the entire process, he demonstrated expertise and flexibility. He patiently explained each step and ensured both my son and I were comfortable and well-informed. Dr. Nick is a true expert and clearly cares about his patients' outcomes. I am incredibly happy with the results. My son’s smile is perfect, and his confidence has soared. We are grateful for the dedication and hard work of the entire team.

- Nicole L

5 out of 5 stars by Nicole L on

Patient Review By David B

First off I hated going to a dentist. That was until I started going to DiNinno Family Dental. I always feel at ease when I see Dr Nick and staff. Had to see him today because of an awful pain in my tooth. Could not even chew on food. Had an X-ray plus an adjustment on my tooth along with meds prescribed. Have not even picked up my meds yet and I feel so much better. Thanks to Dr Nick and his staff. I feel like I am treated like family when I go there and they always care about their patients. What a Fantastic dentist and human being. And a truly kind and caring staff. Thank You DiNinno Family Dental for Another Wonderful and Quality Experience. David Burroughs

- David B

5 out of 5 stars by David B on

Patient Review By Donna M

Just finished ANOTHER AMAZING dental appointment with Dr. Nick III. He is like magic making two cracked and chipped teeth look brand new. I have been going to DiNinno Dental for 39 years and would never ever think of going anywhere else. Started out of course with Dr. Nick Jr. who took the fear of dentistry out of me completely. Can you imagine liking the dentist office? Well, that is what happens at DiNinno Dental. Now with Dr. Nick Jr. semi retired.....so deserving....I see Dr. Nick III and like his father, he doesn't miss a beat/ Cool and calm and so patient. Everyone at this office is top notch. And I can't say enough about my hygenist Krissy, she has been keeping my teeth in check for a whole lot of years now and I don't know what I would do without her. So....if you are not going to DiNinno Family Dental than you are going to the WRONG DENTIST! Thank you everyone at DiNinno Family Dental!!

- Donna M

5 out of 5 stars by Donna M on

Patient Review By Jacqueline V

I am so happy that I changed to DiNinno Family Dental. I was looking for a new dental practice and they are very close to where I live. Everyone was so helpful. The office and examining rooms were immaculate!! Staff was very friendly both on the phone to schedule my first appointment and when I arrived. I felt very comfortable there right away. I had to have a procedure that I wasn't looking forward to BUT Dr. DiNinno made me feel like "everything would be ok!! Jackie V

- Jacqueline V

5 out of 5 stars by Jacqueline V on

Patient Review By Douglas and Judi D

Always a pleasant visit!

- Douglas and Judi D

5 out of 5 stars by Douglas and Judi D on

Patient Review By Theresa S

I wish I could give Dr. DiNinno and his wonderful staff 10 stars. I had to have extensive work done on a majority of my teeth, caps and bridge, and I am so pleased and happy with my results. I feel like a new person. From beginning to end, Dr. DiNinno explained the entire process to me, and we made decisions together in a most collaborative way. In summary, he is the best dentist I have ever had in my 72 years. His staff from the front desk to the hygienist to his assistants are friendly, capable and do a great job. I highly recommend him. You will not be disappointed, and I look forward to continuing to get my dental care from him.

- Theresa S

5 out of 5 stars by Theresa S on

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

5 out of 5 stars by Nicole G on