Meet Our Doctors:
MATTHEW C. LEIGHTON D.D.S.
Originally from Vestal, NY, I grew up in a family of seven with a sister and three brothers. My father and mother instilled in me the value of higher education and health professions at home and as a clerk in their pharmacy business. I quickly learned how to provide customer service and the value of relationships with our customers.
I received my Bachelor’s Degree in Mechanical Engineering from Rochester Institute of Technology in 1989 and worked in a nuclear power plant before returning to college life to become a dentist, a dream I have had since the age of eleven. I received my Doctorate of Dental Surgery from SUNY Buffalo School of Dental Medicine in 1994, then a residency certificate in General Practice from St. Clare’s Hospital, Schenectady, NY in 1995. I returned to my hometown to practice for a few years, then moved to Amherst, NH with my wife Cathy, and joined Dr.’s Kayser and Clark in 1998.
I have been caring tirelessly to deliver the highest quality dentistry to the patients of our practice as well as provide a safe and comfortable environment for them and our team. The level of customer service our team provides is unsurpassed in our community.
Dedicated to lifelong learning, I attend continuing education and participate in study clubs to keep abreast of the latest advancements and treatment techniques. I am a Dawson Alumni and a member of Spear. I am a member of the American Dental Association, the New Hampshire Dental Society and the Nashua Dental Society.
Outside of my professional life, I give back to the community as a board member for the Northern New England chapter of the Cystic Fibrosis Foundation. I volunteer as a coach for my son’s Ice Hockey team, I am an adult leader with Amherst Boy Scout Troop 613 and strive to be the best husband and father my family could ask for.
VALERIE PEREIRA LIANG D.M.D.
In July of 2018, I left Connecticut and came to work at Clark & Leighton. Their commitment to patient care is perfectly aligned with my practice philosophy. As part of my commitment to higher learning and continuing education, I am a member of the American Dental Association, the Academy of General Dentistry, and the New Hampshire Dental Society.
Outside of dentistry, I enjoy swimming, reading, and knitting; as well as spending time with my husband and toy poodle.
Our highly skilled team includes three dental hygienists, two dental assistants, and four business/treatment coordinators; all focused on making your dental visit both comfortable and worry free.
Our entire team attends continuing education seminars on a regular basis, to ensure you receive the best possible dental experience. Click Here To See What We Can Do For You!
Supporting Our Community
We believe in supporting local programs and charities in our community.
+ Click to see a list of those we have had the privilege to help support.
Amherst Fire Dept.
Amherst Fourth of July Celebration
Amherst Garden Club
Amherst Holiday Tree Lighting Festival
Amherst Junior Woman’s Club
Amherst Lion’s Club
Amherst PTA Annual Play
Amherst Police Dept.
Amherst Recreation Dept.
Boy’s and Girl’s Club of Souhegan Valley
Bridges for Peace
CBM Cares Luau
Crotched Mountain Foundation
Cystic Fibrosis Foundation
Friend’s of the Amherst Town Library
Greater Nashua Dental Connection
Home & Hospice of Milford, NH
Community Hospice House Merrimack, NH
Kim J. Cates Memorial Scholarship Fund
Kitty Angels Annual Craft Fair
Holiday Toy Store (annually since 1987)
Gateways Community Service
High Mowing School
Hollis Elementary PTA Auction
Honor Flight New England
Milford Crop Walk
Milford High School Robotics Team
Milford Rotary Club
Milford Wadleigh Memorial Library
New Hampshire Food Bank
Pan Mass Challenge (Dana-Farber Cancer Institute)
Post 74 Legion Baseball (Brookline, NH)
Share Food Bank
Souhegan High School First Robotics Team
Souhegan High School Hope for Gus Fun Run
Souhegan High School Project Graduation
Souhegan PTA Annual Play
Souhegan Scholarship Foundation
Special Olympics of New Hampshire
Susan B. Koman Walk to cure Breast Cancer
Trinity High School Annual Golf Tournament
Wilton Destination Imagination
Wilton Lyndeborough High School
Wounded Warrior Project