Our Team
Meet the Doctor
Mary Frances Jahnke, D.D.S.
A proud native of Lake Country, Dr. Mary Frances Jahnke is thrilled to bring her family dental practice to her hometown of Oconomowoc. Dr. Jahnke received her Bachelor of Science degree at Marquette University and her Doctorate of Dental Surgery at the University of Minnesota’s School of Dentistry in Minneapolis.
Before launching Jahnke Dental, Dr. Jahnke completed a two-year residency program at the Clement J. Zablocki VA Medical Center in Milwaukee, where she served veterans with comprehensive dental care. There she orchestrated complex treatment plans encompassing all facets of dentistry, notably: the restoration of dental implants, crowns, bridges, root canals, removal of teeth, and the fabrication of removable prostheses such as dentures or partials. Dr. Jahnke is always growing and honing her skill set.
Dentistry and continuing dental education are not only Dr. Jahnke’s passion, they’re also part of her DNA. Her grandfather, Earl Jahnke, was a general dentist outside of Madison. Her late father, Peter Jahnke, was a periodontist (gum specialist) here in Oconomowoc. Dr. Mary Frances learned from the best, seeing firsthand the difference that listening and connection can make for a patient.
Committed to a philosophy of open dialogue, Dr. Jahnke sits down with each new patient to talk about their needs and answer any questions before completing her initial exam. When you come to Jahnke Dental, you can trust that she will be the first face you see.
Dr. Mary Frances Jahnke is a member of the American Dental Association, Wisconsin Dental Association, Academy of General Dentistry, and is active with the Frank Spear Institute for dental education. She not only works in Oconomowoc, she also lives there with her family of four. Spot the whole crew every year in the Halloween Parade, representing Jahnke Dental. When you see them, shout hello!
Meet Our Team
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Yvonne
Business Manager
Yvonne has been running a dental office for over 30 years, starting as the business manager for Dr. Peter Jahnke’s periodontal practice in 1993. She and Mary Frances started Jahnke Dental in 2015. In her spare time, she enjoys traveling, teaching Sunday School and spending time with her grandkids. She is an avid lover of art and history and has been to more museums than you will ever go to in your life!
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Jessica
Dental Assistant
Jessica has worked in the dental field for over 25 years and joined Jahnke Dental in 2017. She has been married to her wonderful husband for over 30 years. They have one married daughter and 2 playful labs. When not working, she enjoys cooking, spending time with friends, and live music.
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Katie
Hygienist
Katie has been a dental hygienist since 2006 and joined Jahnke Dental in 2021. She is also employed part-time as a clinical instructor for the Dental Hygiene program at Waukesha County Technical College. She has been married over 20 years and has 4 children, whose activities keep her very busy when she is not working.
Mary Kate
Hygienist
Mary Kate earned her Dental Hygiene degree in 2010 and joined Jahnke Dental in 2025. When she's not flossing, she spends her time reading, gardening, and staying active. She's married to her husband John, and has 2 children, AJ and Lenna. As a family they like to get outdoors and enjoy each Wisconsin season.
Erica
Dental Assistant
Erica has been working in the dental field for 4 years. She started out doing front desk work and soon enough became interested in assisting. She finds satisfaction in learning and growing in her chosen fields. She has been married for 10 years and has one daughter who is very active
in extracurricular activities. She also has 5 cats that she took in all at once right before she got married! In her spare time, she loves to go to her daughter's sporting events and plays. She also loves to play volleyball in the summer and travel when she can.
Barb
Dental Assistant
Barb has worked in the dental field for over 40 years and joined Jahnke Dental in 2022. She has been married to her loving husband for 46 years. They have 2 children, 3 granddaughters, and 1 great grandson. When not working she enjoys spending time with her grandchildren, going to antique and thrift stores, and working on her needlework projects.