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.

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

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.