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®
  • 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 and procedures.

Dr. John has been married to our wonderful Mary Ann for over 37 years, and they have six children together, four grandchildren, and one dog. When he is not improving patients’ smiles, Dr. John enjoys spending time with his family and gardening.

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.

Family owned and operated: Dr. John and his wife Mary Ann have been running the business since we opened our doors in 1989. Their son Peter joined in 2017 to help run the business.

Mary Ann

Mary Ann 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 Ann 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, and 4 grandchildren. Outside of the office, Mary Ann enjoys walking, gardening, reading, taking care of her grandkids, and getting back into sewing and needlework.


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 that we are maximizing insurance benefits of the patients.

When he is not working, he enjoys anything outdoors and sports related. He is married to his wife, Michele, one son, and a dog named Zoey.