Dr. Pereira and Dr. Leighton

   Get To Know Us

A paper board with a pencil

     Patient Information

Laptop, phone, and a notebook

     Contact Us

About Us:


A warm and caring atmosphere along with high quality dental care combines to set Ponemah Crossing Dental, 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.


In the dental profession, as in most sciences, dramatic changes occur almost weekly as new techniques and methods are developed. Our team here in Amherst, NH is committed to keeping you abreast of the progress in current dental 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.


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.

Three nurses smiling


Listen to what our patients have to say

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

Cammie O.

Going to Drs. Clark and Leighton office is a serene experience from start to finish. The front desk staff is welcoming and efficient and I never had to wait more than 5 minutes in the 10+ years I’ve been going. Dr Leighton is easy going and easy to talk to. The hygienists are super nice. The billing staff/managers are personable and give you all the info up front about costs for fillings etc. – so no surprises.

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.

May B.

I am always greeted with a smile and a caring attitude. Everyone is completely professional while being considerate of my questions and needs. Work done is gentle as possible and most satisfactory. I love going to my hygienist. She has my complete trust and appreciation for her services.

Laura K.

I’ve been coming to Clark & Leighton for at least five years now. I even drive about 45 minutes to get to my appointments. My hygienist is really great – my teeth look great and feel great when she’s done. Dr. Leighton is personable, and doesn’t waste your time recommending expensive procedures that you don’t need. Try them – you’ll be really glad you did.

Neil M.

Dr. Leighton and his skilled team are thorough and kind. I trust them completely, not only for my care, but for my entire family’s care as well. Great dental practice.

Cheryl S.

Dr Leighton provides excellent care with the highest professional quality. Friendly and caring atmosphere. Highly recommended.

Jill W.

I think they are wonderful dentists, but I love how I chipped a tooth on Saturday and was in a chair Monday morning getting it fixed. I highly recommend them! Excellent care.

Latest News

Over 50 years of excellence!

Over 50 years of excellence!

Ponemah Crossing Dental, P.C. has proudly been providing dental services to our community since 1972, when Dr. Kayser founded the practice. For over 50 years, we’ve had the privilege to serve multiple generations of families, allowing us to share...

read more
Congratulations to Ezra!

Congratulations to Ezra!

Congratulations to Ezra on winning the Children's Stuffed Animal Drawing for the months of June and July! Ezra is six (6) years old and is showing off his exuberance about his new friend! We will be doing another drawing for the months of August...

read more
Vote for us!

Vote for us!

Voting has begun for the 2023 Best of Greater Merrimack-Souhegan Valley Region. Please take a moment and vote for us as your best dentist...it only takes a few minutes and we greatly appreciate your effort. The deadline for voting is August 24th at...

read more

Are You Ready To Get Your Smile Back?