About us


A warm and caring atmosphere along with high quality dental care combines to set Clark & Leighton, P.C. apart from all others. Located at Ponemah Crossing, the junction of Routes 101A and 122 in Amherst, our dental office is within easy access for all Souhegan Valley patients. Our practice has proudly provided care to our community for over 40 years. Recent renovations and digital technology allow our professional staff to offer patients high quality comprehensive dental care.


We strive to provide state of the art dental therapy which produces the finest dental health and improves the quality of life of our patients in a caring and trusting atmosphere. We treat patients in such a way that they will encourage their relatives and friends to visit our office.


In the dental profession, as in most sciences, dramatic changes occur almost weekly as new techniques and methods are developed. Our commitment to you is to keep abreast of the progress in current techniques with the highest degree of professional skill and ability. With dedicated staff members, we work hard to answer questions fully and care gently for your dental needs. We take pride in the high standards that we set.


Listen to what our patients have to say

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Kristina N

Dr Leighton is very friendly and thorough. He makes sure all my questions are answered and also spent time explaining how a recent diagnosis will affect my dental health. I used to have a lot of dental anxiety, but since I’ve started seeing Dr Leighton I actually look forward to going to the dentist

Helen J

I have been a patient of Dr. Clark for more than two decades. He has a wonderful manner, is very gentle, and I trust his recommendations. His work is outstanding. He has done crowns and fillings for me, and everything has been topnotch. I highly recommend him to anyone looking for a new dentist. The office environment is very professional and welcoming, including the front office staff and the hygienist.

Cary H.

Dr.Leighton is very knowledgeable and explains things in a way I can easily understand. He presents options and allows me to take part in the decisions about treatment. Everyone in the office is very helpful and caring. I have complete confidence that I am receiving the best possible care.


With over thirty years of care for me and my family I have never once had a concern about the quality of care, professionalism and service. I cannot imagine ever going to another dentist. Dr. Clark is the best!


Dr Leighton is a very thorough and knowledgable dentist. He will even see a patient before morning hours in an emergency. The care and concern his practice displays is extraordinary. My family and I would highly recommend this facility and Dr Leighton Even my new grandson will soon be his patient.

Latest News

Holiday Toy Store

The Holiday Toy Store is a special organization dedicated to bringing some holiday cheer to the less fortunate children of the Souhegan Valley. This will be our twenty-seventh year participating in their Toy Drive. The Toy Store is anticipating, again, more requests for assistance than ever before.  Anyone interested in joining our effort, simply Drop […]

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Welcome Dr. Pereira!

We are pleased to announce the addition of Dr. Valerie Pereira Liang to our practice. Dr. Pereira’s caring demeanor and commitment to deliver high quality care exemplifies the core values our practice believes are essential.

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Ryan Holding Award

2018 Kids Classic Trail Ride

Ryan Leighton turned a 7th grade school project into an award, given to the highest fundraiser at the 2018 Kids Classic Trail Ride. This fundraiser benefited the Cystic Fibrosis Foundation and raised $1150.00.

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