Cornerstone Dental Group

About Cornerstone Dental Group

Cornerstone Dental Group is a Westford based family dentist practice that treats patients of all ages. We are committed to delivering the highest quality dental care and do so using advanced dental equipment. We are a cosmetic dentist that offers services like checkups, teeth cleaning, crowns, veneers and more.


We also perform emergency dentist services that include bonding, root canals, crowns, and bridges. As a local dentist, we create lifelong relationships with our patients and their families and work to ensure that they receive treatments in a comfortable and relaxed environment. Dr. Papapetros and our staff invite you to schedule an appointment by calling 978-364-3003 and experience why our patients think Cornerstone Dental Group is the best dentist in Westford.



Meet The Doctors


Nicholas T. Papapetros, DMD, FAGD

Nicholas T. Papapetros, DMD, FAGD

Dr. Papapetros has been delivering the highest quality dental care to his community since 1992. Originally from Quincy, Massachusetts, Dr. Papapetros earned his undergraduate degree in biology from Colby College in Waterville, Maine. He then went on to Tufts University School of Dental Medicine, where he earned his dental degree and student awards from both American College of Dentists and the American Association of Endodontists. After earning his dental degree Dr. Papapetros then completed a general practice residency at Lenox Hill Hospital in New York.

Dedicated to continuing education, Dr. Papapetros completed more than one thousand credit hours in continuing education courses and seminars since beginning his private practice. He has studied at such prestigious institutions as the L.D. Pankey Institute for Advanced Dental Education, the Las Vegas Institute for Advanced Dental Studies and Dawson Center for Advanced Dental Study. Dr. Papapetros is a Fellow in the International Congress of Oral Implantologists, International College of Dentists, American College of Dentists, and the Pierre Fauchard Academy. Dr. Papapetros is past President of the Tufts University School of Dental Medicine Alumni Association and the Merrimack Valley Dental Society.

Dr. Papapetros is an active member in many other leading dental and professional organizations, including: International Congress of Oral Implantologists, American Dental Society, Academy of General Dentistry, Massachusetts Dental Society, New Hampshire Dental Society, Merrimack Valley Dental Society, Greater Lawrence Dental Society, Tufts University School of Dental Medicine Alumni Association, and L.D. Pankey Foundation. In his spare time, Dr. Papapetros enjoys spending time with his wife, Andrea, and their four children: Theo, Isabella, Olivia, and Zachary.

Dr. Richard Lam DMD

Dr. Richard Lam DMD

Dr. Lam was born and raised in Boston’s South End. He graduated from Boston Latin and the University of Massachusetts’ Commonwealth Honors College of Amherst with a Bachelor of Science in Kinesiology. He would then earn his DMD from Tufts University School of Dental Medicine.

Dr. Lam's desire to help others who are less fortunate has been apparent in his involvement with Dentists for Humanity and Project Bridge. He has led multiple service trips to Haiti through Dentists for Humanity for three years in addition to volunteering for Project Bridge at local shelters in Boston for at-risk and homeless youth. He received the International College of Dentists Humanitarian Award in 2019 for his exemplified and demonstrated passion for altruistic humanitarian service.

He is an avid learner and enjoys taking continuing education courses, particularly in prosthodontics, complex restorative techniques, and aesthetic dentistry. He has taken courses in advanced surgical principles and implantology. He is an active member in the American Dental Association and Massachusetts Dental Society.

Dr. Lam is an outdoor enthusiast and especially loves camping and hiking in New England’s wilderness. He routinely participates in kickboxing, yoga, and Metcon training in Somerville, MA.

Dr. Lam will prioritize your autonomy and comfort while delivering uncompromising modern dentistry at every visit. He loves what he does and he looks forward to taking care of your dental and overall health.

Dr. Craig C. Gruskowski, DMD

Dr. Craig C. Gruskowski, DMD

Dr. Gruskowski has a true passion for dentistry. Helping people has always been something he takes great pride in doing, and there’s nothing more satisfying than seeing a patient leave with a beautiful, confident smile and knowing that they’re going to have that smile forever. Dr. Gruskowski considers himself very fortunate to have had the opportunity to practice dentistry within the community for almost 30 years. The friendships he has built with his patients and their families means a lot, and he looks forward to spending many more years doing what he loves.

Dr. Gruskowski has been residing in Littleton, MA for more than 50 years and has been providing dental care in the community since 1987. He is a graduate of Littleton Public School, and received his undergraduate degree at Stonehill College where he received his Bachelor of Science Degree in Biology/Chemistry. He is proud to have received his post-graduate education locally as well. He feels a great connection to this area, and a great love for the beautiful state of Massachusetts.

He continued his education in dentistry at Tufts University School of Dental Medicine, where he obtained my D.M.D. degree in 1987. He taught dentistry at Tufts University for 13 years in the Department of Restorative Dentistry as Assistant Clinical Professor until 2000. Continuing education is an essential part of Dr. Gruskowski’s job as a dentist. In order to stay current with the latest advances in dentistry, he participates in yearly continuing education opportunities, and devotes his time and energy to improving the techniques and treatments that he currently offers so our patients always receive the most advanced care possible.

Dr. Gruskowski states, “I am truly honored to be serving the same community where I grew up. I also feel blessed knowing that my wife and I are able to raise our four wonderful children right here in Littleton. My family is important to me, and when I'm not at the practice, I look forward to spending as much time as possible with my wife and kids. I also enjoy golfing, watching my kids play sports, watching professional sports, gardening, and landscape design. I stay active in the community as well, and I am a chairman of the Littleton Athletic Hall of Fame, a communicant of St. Anne's Parish, a board member of the Littleton Electric Light and Water Department, and a member of several other local organizations.”

Meet The Team




Jennifer

Jennifer

Business Manager, Director of Operations

Jennifer joined the team in 2009 as a dental hygienist, after obtaining her bachelor’s degree from Forsyth School of Dental Hygiene at Massachusetts College of Pharmacy and Health Sciences. Since starting in 2009, Jennifer has transitioned into the business manager, and director of operations. She continues to further her education, and has become a Fellow of the American Association of Dental Office Management (FAADOM). Jennifer is also the founder and president of the Boston Chapter of AADOM, a non profit organization that brings local dental managers and practice administration together, for continuing education and networking events. Jennifer focuses on team training, networking, practice culture and furthering the education of the team. When she is not at the office, Jennifer enjoys spending time with her husband Dominick, and their two daughters Addison and Caroline. They loving taking trips to the lakes region of New Hampshire.



Jayme

Jayme

Registered Dental Hygienist

Jayme graduated from Massachusetts College of Pharmacy and Health Sciences in Boston, where she obtained a Bachelor of Science degree in Dental Hygiene. In July of 2014, Jayme joined our family and works at multiple locations. When she's not spending time with her patients, Jayme loves spending time with her family, going to the beach and traveling; especially to Aruba with her husband! She also likes taking barre exercise classes and playing with her niece and nephew.



Katherine

Katherine

Registered Dental Assistant

Katherine joined our team in August of 2011, as a registered dental assistant. She obtained her assisting certificate from Bryman College, where she received extensive training in dental assisting techniques and procedures. As a vital part of our team, Katherine works one-on-one with our dentists, in all aspects of dentistry, and assists our hygienists and our front office team. When she is not working, Katherine loves spending time with her family, camping, skiing, rollerblading and being outdoors.



Dawn

Dawn

Dental Assistant

Dawn joined our team in 2006 after obtaining her certificate in dental assisting from Bryman Institute. She is CPR and radiology certified, and has advanced training in CEREC crown fabrication. Dawn assists our doctors in various dental procedures, while also helping our hygienists and our front office team. She is passionate about living a healthy lifestyle, and enjoys spending her time reading, gaming, and crocheting.



Heidi

Heidi

Administrative Assistant

As our administrative assistant, Heidi has been a part of our team since November of 2003. She obtained her Bachelor of Arts degree from Rutgers University in New Jersey and helps with front office duties, administrative tasks and patient assistance. Heidi hopes to continue to expand her knowledge and expertise within the realm of dental insurance and financial matters, so she is able to pass this information on to our patients. When she is away from the office, you can find her taking on various craft projects, including her favorite, painting furniture.



McKayla

McKayla

Registered Dental Hygienist

As a registered dental hygienist with our team, McKayla spends one-on-one time with her patients discussing oral health, and encouraging happy, healthy smiles. She attended Middlesex Community College, where she obtained her Associate of Science degree in dental hygiene, and has been with our team since April of 2018. McKayla is passionate about dental hygiene and loves motivating her patients to continually improve their oral health. She takes annual continuing education courses in order to keep up-to-date with the latest dental advances, and pass her knowledge on to her patients. She enjoys spending time with her family and friends, walking her dog, reading, traveling and learning more about real estate.



Patty

Patty

Registered Dental Hygienist

Patty is a registered dental hygienist, as has been practicing with our team since November of 2000. She received her Associate of Science degree in dental hygiene from Middlesex Community College, and holds her license to administer local anesthetic, while also being CPR certified. When she’s not at the office educating her patients about oral health, she is often gardening, making arts and crafts, or spending time with her friends and family.