Meet Your Dentist
Meet Dr. Allan McQuarrie
“Your dental health plays a significant role in your overall wellness. My goal is for every patient to feel knowledgeable and confident in making choices that lead to their best health.”
Dr. Allan McQuarrie graduated from Tufts University School of Dental Medicine in 2020, where he was honored with the Dr. and Mrs. Albert J. Kazis Endowed Prize Fund in Crown and Bridge Award for his outstanding achievements in fixed prosthodontics. During his time at Tufts, he also served as a teaching assistant in the fixed prosthodontics course and clinical lab, helping fellow students enhance their dental skills.
While at Tufts, Dr. McQuarrie developed a passion for helping underserved populations. His commitment led him to participate in an externship on a Navajo reservation in Arizona and a Global Service trip to the remote hills of Granja Porcon, Peru. There, he provided essential dental care and oral health education to communities in need that lacked access to these services.
After graduating from Tufts, Dr. McQuarrie pursued advanced education in general dentistry through a residency in Buffalo, NY, where he further developed his expertise in surgical and restorative dentistry. He later moved to Southern California, practicing in Carlsbad and North County San Diego, where he discovered the profound connection between oral health and overall well-being. This experience ignited his commitment to exploring and understanding holistic dental care, while striving to help his patients heal and function at their best.
Dr. McQuarrie's dedication to comprehensive care led him to the International Academy of Oral Medicine and Toxicology (IAOMT), where he delved into the world of science-based biological dentistry. As an IAOMT member, he focuses on reducing toxicity and promoting patient health through personalized, thoughtful treatment.
Originally from Salem, New Hampshire, Dr. McQuarrie is the oldest of three brothers and grew up on Canobie Lake. He has close ties to the Nashua community as he attended both Nashua Catholic and Bishop Guertin High School, where he played basketball and baseball. After high school, Dr. McQuarrie went to Saint Anselm College where he played baseball for four years and majored in Natural Science. Outside the office, he enjoys a variety of hobbies that keep him grounded and energized—whether it's hitting the golf course, exploring a new book, or skiing in the winter. Since returning to the East Coast, he has taken up gardening, nurturing his green thumb to grow his own produce and enjoy the art of self-sustainability.
Dr. McQuarrie is also an active member of the Weston A. Price Foundation, supporting its mission to restore nutrient-dense foods to the American diet through education, research, and activism. He is also dedicated to giving back and values supporting local businesses, particularly farmers. On weekends, you’ll often find him at the local farmers market, picking up raw milk, fresh cuts from the butcher, and seasonal produce.
Meet Dr. John Machell
Dr. John Machell has been a trusted part of the Nashua dental community since 1978. A Nashua native, he graduated from the University of New Hampshire with a degree in Biochemistry before earning his Doctorate of Dental Medicine from Tufts University School of Dental Medicine in 1977. He further honed his skills through a General Practice Residency at the Veterans Administration Hospital in Delaware and Temple University Hospital in Philadelphia.
Throughout his career, Dr. Machell has remained committed to advancing patient care and education. In 2006, he was awarded Mastership status from the Academy of General Dentistry (AGD), a testament to his dedication to continued learning. He has also pursued advanced training in implant dentistry as a member of the American Academy of Osseointegration. Locally, he’s been an active leader within the New Hampshire Dental Society, serving as Peer Review Committee Chair since 1993.
Dr. Machell is deeply committed to his community, volunteering his time and skills to various local organizations. Whether participating in school health programs or offering reduced-fee services to those in need, he has always sought ways to give back. His excellence in dentistry has earned him repeated recognition in New Hampshire Magazine’s Top Dentist list.
Outside of his dental practice, Dr. Machell enjoys soccer, skiing, cycling, and restoring antique cars. He is a family man who values time with his wife, daughter, and son, making the most of life both in and out of the office.
Meet The Team
Kathy Valente
Treatment Plan Coordinator
Kathy brings over 30 years of experience in the dental field, starting her journey as a dental assistant and earning her radiology certificate from New Hampshire Technical Institute. She thrives on building meaningful relationships with patients, always making them feel welcome and answering any questions about their dental health. Kathy resides in Nashua with her husband Don and daughter Eileen. She enjoys gardening, reading, traveling, and relaxing by the beach. Cherishing her time with loved ones, Kathy prioritizes meaningful connections with family and friends.
Sally Fraser-Parker
Registered Dental Hygienist
Sally is a graduate of Westbrook College in Portland, Maine, where she earned her Certificate in Dental Hygiene. She is also certified to administer local anesthesia and perform gingival soft tissue laser treatments. Sally is dedicated to partnering with her patients to achieve and maintain optimal oral health, contributing to their overall well-being. In her free time, she enjoys gardening, reading, relaxing at the beach, and making memories with her husband Ron and their family – Hayley, Jared, Cameron, and Ali.
Melissa Malley
Dental Assistant
For over 20 years, Melissa has been an integral part of our dental team. A graduate of New Hampshire Technical Institute with a degree in Dental Assisting, she is a dedicated professional who is passionate about helping patients achieve their dental goals. She lives in Hudson with her husband, Tim and their children, Ava and Timmy. Outside of work, Melissa enjoys camping, traveling, swimming, and quality time with her family.
Deidre Atwood
Dental Assistant
Deidre joined our team in December 2022, bringing a wealth of expertise since earning her certificate in Dental Assisting from Seacoast Career School in 2014. Her sharp attention to detail ignited a passion for the laboratory side of dentistry, where she excels in combining creativity with patient care. Originally from New Hampshire’s scenic Lakes Region, Deidre has a deep appreciation for life’s simple pleasures and the beauty of nature that surrounds us. In her free time, she enjoys peaceful days on the water, painting, and pampering her two rescue cats, Pablo and Fidel Catstro.
Mindy Hammersla
Business Coordinator
Mindy brings over 25 years of experience as a business coordinator in general dental practices and holds a Bachelor of Arts in Social Science from the University of Massachusetts. With a genuine passion for connecting with patients, she delivers exceptional customer service and treats all our patients like family. Mindy is your go-to problem solver, always ready to address patients’ questions and concerns. Residing in Nashua with her husband Mark, she enjoys their vacations to Aruba, reading, and spending time with family and friends.
Darlene Wills
Dental Hygienist
Darlene is driven by her passion for improving lives through better oral health. She is dedicated to putting the needs of her patients first, delivering personalized and compassionate dental care that promotes long-term wellness. Continuously inspired by advancements in technology, Darlene is committed to providing the highest quality of care to a deserving community of patients that values overall well-being. Her diverse life experiences, from California to abroad, have broadened her perspective, enriching her life with deeper appreciation and gratitude.
Sabrina English
Dental Assistant
A collaborative and passionate team member, Sabrina brings a decade of experience in general dentistry as a skilled dental assistant. A graduate of Seacoast Career School, she joined our team in 2015 and has since embraced the ever-evolving landscape of dentistry with enthusiasm. Her expertise spans a wide range of procedures and complex cases, and her empathetic nature helps patients feel at ease from the moment they walk through our doors. Outside the office, Sabrina enjoys spending time with her boyfriend, Jony, and their daughter, Scarlett, engaging in homesteading, exploring nature, and experimenting with new recipes as a family.
Melissa Collins
Dental Assistant
A New Hampshire native, Melissa has over 20 years of experience working with patients of all ages – ensuring they receive the highest standard of care throughout their dental journey. She is passionate about getting to know her patients on a personal level and making every visit to the dentist a comfortable and enjoyable one. Melissa currently lives in Wilton with her sons, Tye and Colby; her husband, Rob; and her silver lab, Tucker. On the weekends, you can find her on the sidelines cheering for her boys during a sports game or enjoying a camping trip with her family.