Meet the Team

We recognize that all our patients are unique and deserve to receive dental care that reflects their individual needs. Our experienced and talented dental team is committed to working with you and your family to create a comfortable, stress-free, and rewarding dental experience every time you visit our practice.

We are pleased to welcome you and your family, and we look forward to working with you.

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Dental Hygienist

I help patients develop and maintain good oral health through regular cleanings, checkups, and preventive care. I have worked with Dr. Portnoff since she came to the practice and have more than 32 years of experience working throughout the dental field. I enjoy educating our patients on how they can improve their dental health and I love seeing the progress they’ve made when they come back for checkups.

I have three children: two daughters and a son. When I’m at home, I love to cook and entertain. I play tennis a few times each week and enjoy working out at the gym. I have been fortunate enough to do some traveling and enjoy the warm weather.

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Dental Assistant

I work alongside Dr. Portnoff to ensure patient comfort and efficiency during procedures, as well as maintain our high standard of care. I joined Dr. Portnoff and her team in October 2012 and have been working in dentistry and orthodontics for more than 25 years. I love getting to know our patients and teaching them about all the great technology we have to offer. Our team is very supportive of each other and we like to have fun!

I live in Hopkinton where I grew up, with my husband and our three wonderful children. I live on the land my grandfather once lived on.  We call it the “family compound,” because my whole family lives there. I love it! I also love watching baseball and hockey, spending time with my family, and traveling when we can.

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Dental Hygienist

My goal as a dental hygienist is to make sure all my patients are as healthy as they can be. I’ve worked with Dr. Portnoff for ten years and have more than 30 years of experience in the dental field. Our patients are really awesome and I love getting to know them! I really enjoy working with Dr. Portnoff and our fabulous team!

My husband and I have two adult children. I love to see them as often as I can. In my free time I love to exercise, go to the beach, and read.

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Office Manager

I’m involved in all aspects of our patients’ care and wear many hats around our office. I’ve worked with Dr. Portnoff over 16 years and we share the same philosophy of treating patients with compassion and kindness. I am a standing member of the American Association of Dental Office Managers, and currently pursuing my fellowship. With our great patients and wonderful staff, they truly are like my second family.

When I have free time I enjoy cooking, hockey,watching my college aged son play baseball, and finding new and exciting things to do!

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Dental Assistant/Patient Care Coordinator

As a longtime dental assistant, I've recently transitioned to more of an office role.  Having the clinical experience I do, I feel as though I am able to help patients with understanding the procedure they are having from both a scheduling and clinical standpoint.

I've worked with Dr. Portnoff and team since 2011.  I love the high standard of patient care we have dedicated ourselves to in this office. We take time with every patient to ensure their comfort both in the treatment rooms and at the end of their appointments while checking out is maintained.

My husband and I try to get to every soccer game our daughter plays in while she is attending college.  I live on a farm, and have plenty of animals that keep me busy while not at work.  My family enjoys to travel, and our favorite destination is Walt Disney World.

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Dental Hygienist

As a dental hygienist, I love building a rapport with my patients and helping to keep them healthier. I have worked as a hygienist since 1992 and joined Cornerstone in May of 2015. I love that the whole team has the same vision in regards to their dedication to our family of patients.

I enjoy spending as much time as possible with my family. I have two dogs: a black lab, Lily, and a rescue Chihuahua, Pippy. In my leisure hours I enjoy kayaking, cooking, and reading.

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Dental Hygienist

As a dental hygienist, I work with patients to maintain their oral health through dental cleanings.  I strive to educate our patients about  their dental health and work together on preventive care.  With more than 30 years of experience, I derive great satisfaction developing on going relationships to promote their best overall health possible.  I love being here at Cornerstone Dental because of our philosophy of providing compasionate, state of the art, excellent dentistry as well as our sense of community!

My family and I have lived in Hopkinton for over 30 years.  My interests include reading, gardening, cooking, yoga and walking.

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Dental Assistant

As someone relatively new to the dental field (I graduated from assisting school in 2011) I enjoy the atmosphere at Cornerstone Dental.  Everyone I work with are very helpful, happy and we all care about doing the best thing possible for our patients. 

I work alongside the Doctors, to make sure our patient is comfortable throughout their dental procedure. 

I have a little boy, born in 2015.  I have two cats, and a Paint Horse named Kane. Most of my spare time is spent playing with my son, but I do find time to ride my horse!

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Dental Assistant

I started working at Cornerstone Dental in March 2016 after our two offices merged.  I have worked with Dr. Lynch since 1998 and before that for an orthodontist and another General Dentist. I graduated from Dental Assisting school in 1977. My main responsibility is to assist Dr. Colleen Lynch.  We have worked side by side for 20 years and have an efficient, seamless dentist/assistant relationship.  I am part of the team effort for sterilization, lab duties, and OSHA updates.  I also assist the other dentists as needed.  My favorite part of coming to work is connecting with the patients and other team members.  We all work together for deliver quality, caring dentistry.

I live in Bolton with my husband of 37 years.  We have three grown daughters (the doctor, the teacher, the preacher!) three wonderful son in laws, and five adorable grandchildren!  I enjoy gardening, traveling, antiquing, and visitng with family and friends.

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Financial Coordinator/Front Office Team

I joined the Cornerstone Dental team along with Dr. Colleen Lynch's office where I had worked as office manager for almost 20 years, in March of 2016.  This transition to a larger practice has been a new adventure in my life. To be part of this team is exciting, and I continue to grow from this experience. 

It gives me great pleasure to see the patients of Dr. Lynch's office follow us to our new location.  I truly treasure many of the wonderful relationships with many families and look forward to forming many new relationships as well.

I have been living in Hopkinton for 35 years with my family.  I enjoy reading, cooking, yoga, and quiet time in our cabin in Maine.


Insurance Coordinator/Front Office Team

I joined Cornerstone Dental Care in April of 2016.

Being on the front line of patient care, I look forward to helping our patients to maximize their time with scheduling appointments, and coordinating their benefits.

I have experience working with and understanding the unique world of dental insurance. I hope my knowledge will help you to understand your benefits!

I love to spend time with my family, including my grandchildren who absolutely warm my heart. 

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Dental Assistant/Front Office Team












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Dental Hygienist

I have been practicing dental hygiene for 15 years. I graduated from Forsyth Institute at Northeastern University in 2001 and became licensed to administer local anesthesia in 2009. I am CPR certified and I continually take courses through Professional Development Clubs. I live locally, have been married for 12 years and have 3 young children. I am lucky to call many of my patients friends. I love educating my patients while sharing in their personal lives and I look forward to many more years with such wonderful dentists and team! 


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