Reviews Icon Pin Icon Appt Icon Phone Icon
Dr. Liu

Richard Y. Liu, DMD, MMSc

Using an artistic and gentle approach to improve the lives of his patients.

Dr. Liu lives in the seacoast of New Hampshire with his wife and two sons. New Hampshire dentists have voted Dr. Richard Liu a “Top Prosthodontist” in the state for 2017 – the ninth time the Harvard-trained dentist has received this recognition from his peers.

With the sensitivity of an artist (you can see his watercolors on his Newington office walls), the gentle Dr. Liu uses his craft to make people look and feel their best.

“Many people don’t realize the degree to which their teeth affect their appearance. A person’s teeth must relate properly to their facial profile. We are here to help you and make you feel comfortable.” – Dr. Liu

At his successful dental practice, Evergreen Dental Care, Dr. Liu performs top-notch family dentistry as well as specialty services such as bridge and crown restorations, implants, bonding, veneers, Zoom one-hour whitening, Invisalign®, CEREC crowns and more.

In addition to treating patients, Dr. Liu also instructs dental students at Harvard and Tufts. A clinical instructor at Harvard School of Dentistry and assistant dental professor at Tufts, Dr. Liu is shaping the next generation of dentists that come from around the world.

Dr. Liu is well known in the dental community and receives regular requests to speak all over the globe. The recognition and awards keep rolling in, but Dr. Liu humbly brushes off the accolades. He’d much rather be working in his dental practice – helping his patients achieve healthy, beautiful smiles. He is also bi-lingual; he is fluent in both English and Mandarin.


  • Studied dentistry at the University of Pennsylvania
  • Received three years of advanced specialty training at Harvard School of Dental Medicine
  • Studied the biomechanics of dental implants and tissue engineering at MIT


  • Clinical Assistant Professor at Tufts School of Dental Medicine
  • Clinical Instructor at Harvard School of Dental Medicine
  • Associate Professor, Department of Prosthodontics, Harvard University
  • Lectured at an international dental conference off the coast of South Korea
  • Spokesperson for the prestigious American College of Prosthodontists
  • Received NH Dental Society’s first Charles M. Lambroukos Award in Teaching Excellence
  • Numerous awards and certificates for implant dentistry and cosmetic dentistry



Dr Allen

Dr. Maryssa Allen

Dr. Allen is an honors graduate of Boston University School of Dental Medicine. Her pre-doctoral training was focused on digital dentistry, implant-supported prosthetics and removable prosthetics. She was recognized by the American College of Prosthodontics for her achievements in the field of prosthetic dentistry.

Dr. Allen embraces a comprehensive approach to patient care that focuses on education, prevention and quality dental treatment. Her philosophy is based on respect for the individual and the idea that every patient should be treated like a member of her family.

Prior to attending dental school, Dr. Allen worked as a quality control chemist for the Boston-based biologics company Genzyme. Her and her team operated in accordance with FDA standards to assess the safety and efficacy of the drugs Fabrazyme, Myozyme, and Thyrogen.

Dr. Allen lives in Massachusetts with her two rescue dogs and spends her free time reading, boxing and watching the Patriots.


Your Experienced Dental Team

Our team is committed to developing close relationships and building trust by offering compassionate dental care in Newington and Portsmouth, New Hampshire. If you want to meet with our dentist and team members at Evergreen Dental Care, please reach out today by calling 603-436-9200. We hope to see you soon for a visit with Dr. Richard Liu.


Becky Rawson – Hygienist
Becky graduated from NHTI with degrees in dental assisting and dental hygiene. She is also certified in local anesthesia. She enjoys educating the patients on how to improve on their oral health. She takes into consideration her patients’ needs and anxieties when they come to visit. When not at work Becky enjoys chasing her toddler around, cooking, dancing, traveling, gardening and eating ice cream.


Cassidy Banville – Dental Treatment Coordinator
Cassidy has a bachelor’s degree in dental hygiene and joined our practice in 2018. Her favorite part of her job is the ability to help others and being able to touch patients’ lives in a positive way. She also excels at communicating with patients and educating them on proper dental health and the prevention of disease. Her hobbies include reading, traveling, skiing and running. She also enjoys watching the Patriots and the Bruins.


Dainya – Dental Assistant
Dainya has been with Evergreen Dental Care since Feb, 2019. She got her certification in dental assisting at North Shore Community College. Her favorite part about assisting is relaying good oral health care to her patients. In her spare time, she enjoys spending time with her family.


Ana – Office Manager
Ana brings 30 years of financial and business leadership to evergreen dental care. She prides herself in creating a seamless experience between the office and clinic for her patients. Ana lives in York, Maine with her husband and son. When not in the office, she enjoys sailing, reading, and crafting.