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Our practice was founded over 30years ago when Dr. John J. Ahern and Dr. Sean Nichols purchased the practice of Dr. Gene Larochelle. As the practice grew, they asked another classmate from Georgetown Dental School, Dr. John P. Ahern, to help them care for their expanding practice. A few years later Dr. Donald Hersey, also a Georgetown classmate, followed suit. As the practice continued to grow, the partners looked to a former patient they had mentored through undergrad and dental school, Dr. Stephen Butterfield to join the team.
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Healthy, beautiful teeth bring a smile designed to dazzle. With our expert preventive, restorative and cosmetic care, you can ensure your teeth stay strong and vibrant. Our practice is built around complete-care philosophy that delivers a lifetime of sensational smiles! Comprehensive care for your entire family - from a child's first visit to creative solutions for the most complex issues.
We are happy to provide evening appointments for our patients. Due to their popularity and so that we may serve everyone fairly, we have developed a special policy, and we ask for your cooperation with this. For patients requiring multiple appointments, we ask that one daytime appointment be scheduled for every two evening appointments.
Your first contact with our office will be with a member of our administrative team. They are eager to make your experience a pleasant one and to assist you with scheduling the necessary appointments for your care plan. We will create a financial plan if necessary that works with your budget, including the option of Care Credit.
Dr. Sean Nichols loves the dental practice he has helped to build here in Derry, NH. A dental office that is family oriented, supportive of the community, and available to everyone. He enjoys coming to an office where the atmosphere is fun, compassionate, and caring. Dr. Nichols holds a degree from Providence College and Georgetown University School of Dentistry. He is a 30 year Board of Director of the Derry Boys and Girls Club of Greater Derry and is involved with several community charitable endeavors.
Reviews (19)
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Sean S.
May 27, 2022
Finally found a good dentist. Dr. Nichols is very professional and friendly. The hygienists are very gentle and friendly. I never felt pressured to have them do any work which is something I can't say for other dentist in the area. I really like them and will be a permanent patient. I highly suggest giving them a try if you're in need for dental work.
K. S.
Mar 23, 2022
Do not use this dental office! If you call with a problem the office manager will promise the dentist will call you back but your teeth will fall out before you ever get a call. They take your money but not your phone call.
Margaret Emmons
Feb 14, 2022
Thank you to all the staff at Family Dentistry. A special thank you to Lydia and Dr. John Patrick Ahern for making me feel relaxed and welcomed. I appreciate all that you do to make my experience a pleasant one. Look forward to seeing you in six months.
Kathy Pigeon
Feb 12, 2022
Ashley was very gentle and understanding. I have a mouth full of patched up teeth and I know they have to be a challenge. She was informative and personable.
Leslie Schilling
Jan 24, 2022
I have been a patient for more than 30 years. The staff is professional, friendly and informative, and the Docs are great! I highly recommend this dental practice!
Dan L.
Dec 09, 2021
I saw Sean Nichols today for a tooth ache. He was very through and refilled it very painlessly and he solved it! Sean is top notch and takes the pain out of going to the dentist! It truly is a family atmosphere at Ahern and Nichols!
Kim Wells
Jul 29, 2021
Very good hygiene care by Erin. John Patrick is second to none and I always appreciate his insight into my dental care. If it's possible to enjoy your dental visits, this practice encompasses the whole experience!
Ddeanwms
Jul 24, 2021
Enjoyed Felecia for the first time - WOW! She is so thorough and proactive. When Dr. Nichols came in for his review, Felecia had 4-5 points that she brought up that she wanted him to check out. She is interesting, friendly, skilled and positive and upbeat. A pure delight on a Monday morning dentist visit. I enthusiastically recommend her!
Gene Decamp
Jul 14, 2021
Brenda is the best! She's very knowledgeable and gives me a superb analysis of my teeth. She also advised me on the the best way to improve my personal dental care. Dr Nichols was also great! He gave me excellent advice on the next steps to manage my dental care. Thanks!
Robin Thurgood
Jun 25, 2021
I enjoyed my visit with Felicia and appreciated her efforts at managing the discomfort of placing the X-ray in my mouth so many times. We discussed how one day technology will advance to make this an easier task. Can't wait!
Robie Robichaud
Jun 02, 2021
Since 2008 doctor D Hersey has been our family dentist for me and my wife. I have found him and the staff to be a great group dentistry professionals. So much so that now that I have retired and moved almost 200 miles north I continue to drive down for all my cleaning and dentistry services. I would highly recommend Ahern Hersey Nichols and Buttetfield for all of your dentistry care. They all really do care and are like family to us Robie & Connie
Claire Karibian
May 15, 2021
Lydia was perfect in every way. She made sure I was comfortable and then proceeded to take the necessary X-ray's and then cleaned my teeth. Dr Kyle checked my teeth and immediately noticed a small cavity and made an appointment to take care of it. I believe he is an excellent addition to the practice.
Diane Breeden
Mar 06, 2021
I hardly knew I was at the dentist. Dawn was so fun to talk with and very clear about any issues she saw in my mouth but did it in a way that was interesting and informative and not judgmental. She was efficient and professional. Funny that I had never met her in all the years she has worked there and the years I have been a patient of the dentistry.
Kris R.
Feb 19, 2019
Fantastic practice. The admin staff is super friendly, confident and knowledgeable. The dentist had THE BEST BEDSIDE MANNER! I was very nervous and he explained everything and made sure I was comfortable. Wonderful experience!
Deb E.
Mar 20, 2018
Our family has been patients of Ahern, Nichols, Ahern, and Hersey for many years. The care is always top notch. Today, I had to undergo root canal surgery, the first ever in my 60+ years on this earth. I am very happy to say that the incredible care that Ahern, Nichols, Ahern, and Hersey shows to its patients also extends to the endodontic staff, headed up by Dr. Mario Abdennour.

I have absolutely no courage when it comes to dental surgery, and Dr. Abdennour and his staff made it seem relatively easy. Eight hours later and I have no pain! I highly recommend Dr. Mario Abdennour and the staff at Ahern, Nichols, and Ahern dentistry in Derry, NH.
Barbara A.
Feb 13, 2017
I hated going to the dentist, until I found Ahern, Nichols, Ahern & Hersey. More specifically, until I started seeing Marie for my hygiene visits. She listened to my concerns and we developed a treatment plan that keeps my teeth healthy. I haven't had any issues since beginning treatment at this office about 10 years ago. I've since moved out of Derry and no longer work in town either, but I will keep making the trip to this office as long as they are in operation. I recommend them to anyone who will listen! Visit this office. You won't regret it.
Dan G.
Sep 03, 2016
Been coming here for years and it's always a great experience. The entire staff are super friendly & professional. The equipment is state of the art, they offer call/text reminder, and scheduling is easy, just make sure you book your appointments 6+ months in advance because they're always busy!
Nick Z.
May 06, 2014
Just started with this practice 18 months ago, and really impressed with the customer service and professionalism. Also great that they have a surgeon in the same building. They took care of a failed root canal (different dentist) with an implant. Great work!
Ann B.
Jan 18, 2012
Over the last several years, I have had the chance to be seen by most of the dentists and hygienists on staff, and have found them all to be professional and friendly. I have also appreciated their balanced and practical approach to advanced dental care. This is in stark contrast to previous dentists I have seen, who have pushed crowns and orthodontia that likely wasn't necessarily.