John Gernetzke, DDS


Dr. John received a bachelor’s degree in biology from Marquette University in 1986, then went on to receive his Doctor of Dental Surgery degree from Marquette, top of his class, in 1989. He received advanced training in orthodontics, neuromuscular dentistry and implantology. He has completed community service as a member of the St. Paul Catholic Church Knights of Columbus. He is proud to be a part of the following organizations:

  • American Dental Association®
  • Academy of General Dentistry
  • International Dental Implant Association
  • Wisconsin Dental Association
  • Rock County Dental Association

His top priority is helping his patients obtain excellent dental care. He loves seeing his patients’ smiles, knowing that he has helped improve their lives, comfort and confidence. He works hard to build relationships with patients and treat patients the way he would want to be treated. He continues to advance his own skills through continuing education and utilizing advanced technologies.

Dr. John has been married to our wonderful Mary Ann for over 33 years, and they have six children together, and one dog, Bella. When he is not improving patient smiles, Dr. John enjoys spending time with family, gardening, photography and stamp collecting.

Meet Our Team

Our friendly, caring and close-knit team are looking forward to caring for your smile! We love giving patients smiles they can love and keep for a lifetime. Call The Grove Family Dental and TMJ Clinic today at (608) 882-4441 to schedule an appointment with our dentist, Dr. John Gernetzke, and learn more about dental care in Evansville, Wisconsin.

Peter – Office Manager

Peter joined our team in September 2017. He graduated from the University of Wisconsin-Madison. He enjoys being able to help people receive great care, and he loves seeing people leave happy. He works hard to make sure the office is running smoothly and makes sure we are maximizing insurance benefits.

When he is not working, he enjoys anything outdoors. He is married to his wife, Michele, and they have a dog named Zoey. Dr. John is his father!

Mary – Administrative Assistant

Mary has been with our practice since the beginning! Being married to Dr. John, she has been with him every step of the way through dental school and growing the practice. For her, being here now gives her a sense of accomplishment and the full realization of a dream. She and Dr. John included their children in the life of the practice, truly making it a family business.

Mary tries to perform all her duties thoroughly with honesty and accuracy to ensure the practice can continue to thrive and grow. She and Dr. John have six wonderful children. Outside of the office, Mary enjoys walking, gardening, reading and getting back into sewing and needlework.

Khali — Receptionist

Khali is one of the first smiling faces our patients see when they come into The Grove Family Dental and TMJ Clinic. Khali has an associate degree and has been with our team since May of 2018. She works hard to give our patients a good experience from the moment they call or walk in to the moment they leave. Khali has had TMJ and orthodontic treatments done at our office, so she personally knows how our dental work can help improve your life. She loves how our team is like a family and that we all want the best for our patients and each other.

Khali has a loving husband and a house full of pets: two dogs, three cats and a gecko! She enjoys doing outdoor activities with her family, friends and pets. She also likes crafting, cooking and traveling.

Becky — Dental Hygienist

Becky started out in the dental field as an assistant and worked for six years before going back to school at Madison College to become a hygienist. She has been with our team since 2015, and we are grateful to have her experience on the team. She loves the family atmosphere we have and how we love our patients; getting to know them and their families is one of her highlights of working here. She also loves the new tech Dr. John brings in to keep our practice on the cutting edge.

Becky and her husband, Adrian, have two daughters, Emma and Addisyn, and two dogs, Bella and Rosie. Becky loves spending time with her family and friends, floating in the pool and going up north to their family cabin.

Leah – Registered Dental Hygienist

Leah has been a part of our practice since 2017. She earned her associate degree in dental hygiene from Waukesha County Technical College in 1998. Having been a hygienist for more than 22 years, Leah is the team member with wisdom and experience! She loves her flexible schedule and working with state-of-the-art technology and a great boss and coworkers

Leah and her husband Jeff have three kids and two dogs. Away from the office she looks forward to camping, cooking, visiting wineries and traveling the United States.

Kierstin – Dental Assistant

Kierstin studied dental assisting in Madison and earned her certificate in 2013. She joined the The Grove Family Dental and TMJ Clinic team in March 2020. She loves working here because we use advanced dental technology to continuously provide our patients with the best dental care possible. Kierstin is very close with her family and spends a lot of her spare time with them. She also loves the outdoors and going to concerts. Kierstin has two cats: Ellie and Louis.

Madison — Dental Assistant

Madison is a graduate of the Blackhawk dental assistant program and has been with our team since 2020. She loves being part of a team that shares a common goal and works together to meet that goal. She brings a positive attitude and ambition to achieve help the practice be the best it can be through teamwork and quality patient care.

Outside of the office, Madison likes to spend time with friends and family, usually hiking or at the lake.