9654 Sparta Ave NW, Sparta, MI 49345, (616) 887-7389



Dr. Andrew Knowlton

Dr. Andrew Knowlton
I decided to become a dentist following a skiing accident in high school resulting in a broken jaw and a few missing teeth. My dentist made me feel great during a time that I thought my social life was over. I knew I wanted to give people the same feeling I experienced.

I grew up in Belding, and wanted to practice dentistry in a similar community in West Michigan. Sparta is the perfect fit for me. After graduating from Belding High School, I attended Andrews University where I received a bachelor's degree in Medical Technology. I then went to the University of Michigan, and started here right out of dental school in 1999.

My wife Pam and I have three wonderful boys and one beautiful daughter that keep us hopping. We are all very active in our church, and love to be outside playing.

Dr. Jordan Masson

Dr. Jordan Masson
Originally from the east side of Michigan, I grew up about 40 minutes north of Detroit.  After graduating from Lake Orion High School, I attended Western Michigan University.  After receiving a bachelor’s degree in Biomedical Science from WMU, I set my sites on Dental School.  From 2004-2008, I attended the University of Detroit Mercy School of Dentistry.

Straight out of dental school, I worked as an associate dentist in Virginia Beach, Virginia for 2 years.  Although the weather was great and the ocean views were breathtaking, it wasn’t Michigan.  In 2010, I moved back to Michigan, worked as an associate dentist in Big Rapids and Sidney, and was lucky enough to marry my soul mate, Megan.  We have lived in West Michigan since, and wouldn’t have it any other way.  We have two sons, Jacob and Tyler, as well as a “furry son”, our Bulldog, Oscar.  Family is by far the most important thing to us, and we try to spend as much time as we can together.

As for dentistry, I pride myself in treating people the way I want to be treated.  I understand that going to the dentist is not the most enjoyable event for most people.  For that reason, I try to make every patient interaction comfortable and relaxing.  I truly enjoy creating personal connections with my patients and strive to provide them with the best possible treatment available. 

Tonya Dental Hygienist Tonya
Dental Hygienist

I became a dental hygienist after graduating from GRCC in 1996. I worked for a dentist in Grand Rapids before becoming a hygienist at Knowlton & Masson Dentistry in 2008. I feel truly blessed to be working here with such an awesome group of dental professionals.

My husband, Gabe, and I live here in Sparta with our 3 kids Abriel, Landen, and Abbie.

Diane Dental Hygienist Diane
Dental Hygienist

I started working for this practice in 2003. I learned my trade at Grand Rapids Junior College, graduating in 1982. Becoming friends and educating my patients on proper dental care is just one aspect of my job. Helping you keep your teeth for the rest of your life is my ultimate goal. I enjoy the people I work with, both co-workers and patients. We are a fun, hardworking team that will do our best to provide the very best dental care to our patients.

My husband, Dennis, and I reside here in Sparta. We have two children, Travis and Holly. In my spare time I enjoy reading, outdoor activities, and watching my kids participating in sports.

Angie Dental Hygienist Angie
Dental Hygienist

I first started working for this practice in 2000. I graduated from Ferris State University in 1998. I think it’s great that I can say, “I love my job”. I have great bosses and coworkers. I feel lucky to be a part of such a wonderful team. I enjoy educating my patients about their dental needs. I will go out of my way to make you feel comfortable. My favorite part of my job is making friends out of patients.

My husband, Todd, and I have two beautiful children.  In my free time I like to scrapbook, read, and spend time with my family

Diane Dental Hygienist Diane
Dental Hygienist

I was fortunate to have begun my career at this practice right out of college. I am here to help you obtain optimum dental health and therefore improving your general health. It is my job to oversee the health of the bone and gums that support your teeth and hold them in place.

Together, you and I will fine tune your oral hygiene techniques and discover which products work best for you. I look forward to working with you.

My husband Jeff and I have two children, Devin and Courtney. I enjoy spending time with family and friends, reading, and being outdoors.

Linda Dental Hygienist Linda
Dental Hygienist

I have been a dental hygienist for over 25 years. For more than half of those years, I have served the patients of this practice. I have enjoyed the relationships that I have made while doing my best to help prevent gum disease. I find the most professional satisfaction in working with special needs or very apprehensive patients.

I am married to Mark, a policeman, and am proud of my three teenage daughters. My hobbies include cooking, walking (off the cooking), and reading.

Lynn - Dental Assistant/Bleaching Consultant

Dental Assistant/Bleaching Consultant

I’ve been a dental assistant for over 10 years now. I love my job! I love it because I know that I work for doctors who truly care about their patients. I love making our patient’s visit as pleasant as possible. To me, it’s not about the job, it’s about the great results our patients get from whitening their teeth. I look forward to helping you achieve a bright and beautiful smile.

My husband, John, and I have three girls, and two grandsons (so far). I enjoy my family, my God, and His great outdoors.

Adrianna Dental Assistant Adrianna
Dental Assistant

I have had the privilege of working for Dr. Knowlton since 2004. I earned my dental assistant degree from Olympia Career Training Institute. I really enjoy our team and have learned a lot over the years. I enjoy establishing relationships with all of my patients and co-workers on a daily basis. My first priority is making my patients comfortable and aware of what we will be doing during the appointment.

I have been married to Erik since September of 2004. We have a son, Ashton, and a dog, Dakota. In my spare time I enjoy scrap booking, boating, camping and taking Dakota for walks.

Meridith Dental Assistant Meridith
Dental Assistant

I started working with the dental practice in August of 2007. I took a training class in Muskegon, Michigan to become a dental assistant. Being a dental assistant is very rewarding because I know I’m improving the patient’s dental and overall health. It is my job to make my patients visit as comfortable as possible.

I have been married to my husband Rick since July of 2005 and we have 3 daughters named Natalie, Carley, and Avery. I enjoy shopping, scrap booking, visiting Mackinac City and spending time with my family.

Dental Assistant

I have been in the dental field for over 20 years.  I have done everything from assisting the doctors and hygienists to handling front desk tasks.  I have never regretted my decision of becoming a dental assistant.  I love every aspect of my job, especially, helping patients of all ages understand the proceedure they are going through.  

My husband, Greg, and I have been blessed with 2 sons, 2 daughters, 2 grand daughters, and a grandson.  We enjoy spending any and all time that we have with our family outdoors.  We love camping, cookouts, playing softball, and shooting skeet.

Sterilization Technician / Dental Supplies Manager

I have been with this practice since 1999.  I am a part of the "behind the scenes" personnel.  I quite often seat patients, help with their periodontal charting, sanitize and set up the operatories, and sterilize the instruments.  I am in charge of the records, fabricate study models, order dental and office supplies, and much more.  

I mostly enjoy meeting and visiting with patients.  I truly enjoy my job here and feel very fortunate to be a part of this awesome team.

My husband, Gary, and I have 2 wonderful grown daughters, Salina and Kami.  Salina and her husband, John, have 2 children.  Kami is married to Eric, who is in the Navy.  Having Eric stationed in different places has allowed me the opportunity to visit many states around the U.S..  My hobbies include camping, kayaking, photography, scrapbooking, and spending time with family.  Having two grandchildren means I get to babysit a lot, which I love.  

LuAnn Financial Coordinator LuAnn
Financial Coordinator

I joined this practice in 1994 as a receptionist and have recently changed positions to financial coordinator. As a “numbers” person, I love my new position. I enjoy helping our patients with their financial needs. I will do my best to help you make your treatment financially possible. Dealing with insurance companies can be very trying, but I get excited when I can help a patient completely understand their benefits, and resolve problems.

I have been married over 28 years to my awesome husband, John. We have three beautiful daughters and a wonderful son-in-law: Trisha & Jason, Candi and Kelee. I teach piano, and enjoy reading, scrap booking and family time on my days off.

Mary Jo Scheduling Coordinator Mary Jo
Scheduling Coordinator

I have been with Knowlton & Masson Dentistry since 1993. I started as the Sterilization Technician, and shortly thereafter began my role as the Scheduling Coordinator.

My administrative duties include confirming appointments, answering incoming calls, and sending periodic mailings, which include postcards for upcoming hygiene appointments. I have enjoyed the challenge of new technology. It is my goal to make you feel comfortable by adding a personal touch to your visit.

My husband Lawrence and I live in Grand Rapids. We have an adult daughter, Monica. I enjoy reading, cooking, scrap booking, and boating.