Our Doctors
John Borja DDS
Meet Dr. John, a seasoned dentist with over 37 years of experience, passionately providing care to his favorite people. Born and raised in Guam, Dr. John pursued his undergraduate and dental education at Marquette.
Dentistry runs in the family, with Dr. John's father serving as a dental lab technician. He completed his dental journey at Marquette Dental School in 1986 and has since been dedicated to helping everyone achieve better oral health through education, treatment, and setting an example. Dr. John's commitment extends beyond the office, with mission trips to Guatemala in 2010 and 2015, as well as participation in Mission of Mercy from 2013 to 2017.
Beyond his professional life, Dr. John engages in Ironman competitions, biathlons, cross-country skiing, playing the piano, racing sports cars, fishing, hunting, and extensive travel. He also enjoys spending time with friends and family.
Anna Minnema DDS
Meet Dr. Anna, a compassionate dentist born and mostly raised in rural northwestern Wisconsin. Growing up in a healthcare-oriented family, with a physician father and a nurse mother. She identified a significant need for dentists in her rural town and decided to pursue dentistry.
Dr. Anna's journey led her to discover the joy of both the healthcare and artistic, hands-on aspects of dentistry during dental school. With a Biochemistry/Molecular Biology BS from Bethel University and a Doctorate of Dental Surgery from the University of Minnesota School of Dentistry, she has been practicing as a dentist for 14 years. Passionate about working in a rural area, Dr. Anna loves getting to know her patients, and fostering a sense of community. She values open communication and collaboration with patients, emphasizing the importance of making treatment decisions together.
Beyond her professional life, Dr. Anna enjoys hiking, camping, being a "foodie," and spending time with her family.
Megan Oldridge DMD
Meet Dr. Megan, a compassionate dentist dedicated to diagnosing and prescribing tailored treatments for patients of all ages. Originally from Chatham, Illinois, Dr. Megan's personal experience with braces as a child ignited her passion for dentistry, recognizing the transformative power of a confident smile.
Dr.Megan holds a BS in Biomedical Sciences with a minor in Spanish for the Health Professions from Marquette University and a DMD degree from Southern Illinois University School of Dental Medicine. With three years of practice in Illinois, Dr. Megan has brought her expertise to Wisconsin. Taking a comprehensive and individualized approach, Dr. Megan believes dentistry doesn't need to be scary. She ensures patients are active participants in their care, maintaining a light and fun atmosphere, even during significant procedures.
Beyond her professional life, Dr. Megan enjoys spending time with her husband and son, indulging in reading, crocheting, and watching movies in the theater.
Our Team
Michelle Bronkhorst
Dental Assistant
Meet Michelle, a Certified Dental Assistant with a passion for dentistry that dates back to her childhood in Waupun, Wisconsin. Since the fifth grade, Michelle expressed her desire to work for a dentist, and she has been fulfilling that dream.
Michelle finds fulfillment in relieving patient discomfort and contributing to creating beautiful smiles. Michelle took part in a mission trip to Guatemala, providing dental care to individuals who walked for hours to receive treatment.
Beyond her professional life, Michelle is an avid sports enthusiast who loves watching and participating in various sporting events. She has a particular fondness for running and has completed numerous races and triathlons. Above all, Michelle cherishes spending time with her family.
Brandi Rens
Dental Hygienist
Meet Brandi, a skilled dental hygienist dedicated to optimizing oral health. Specializing in assessments and patient education, Brandi provides tailored tools, techniques, and treatments for the utmost benefit. Born in Wisconsin and raised between North Carolina and Wisconsin, her passion for dentistry is inspired by her mother, a fellow dental hygienist.
Brandi earned her associate's degree in dental hygiene from Fox Valley in 2016. The most rewarding aspect of her job is witnessing the positive transformations in patients' gum tissue and overall health through hygiene visits. She takes pride in establishing genuine, trusting relationships with patients to deliver the education and treatment needed for optimal oral health.
Beyond the dental office, Brandi cherishes moments with family, dogs, and friends. Her favorite activities include camping, summer motorcycle rides, and winter snowmobiling. Brandi also enjoys shopping, dining out, and cheering on her girls at sporting events.
Teresa DeVries
Admin Team
Meet Teresa, the Doctor and Hygienist Coordinator, born and raised in Waupun and dedicated to making a positive impact in the dental field. Teresa, a lifelong resident of the Waupun area, takes pride in her role as a mother to two amazing daughters.
Passionate about dentistry, Teresa finds joy in witnessing patients leave with a smile, recognizing the significance of teeth in shaping one's self-esteem.
Beyond her professional life, she enjoys outdoor activities, attending concerts, embarking on road trips, and cherishing moments spent with friends and family.
Linda Thalacker
Admin Team
Meet Linda, the welcoming first point of contact at the practice. Engaged in various aspects of the administrative role, Linda efficiently handles appointments, insurance claims, treatment plans, daily accounting, and banking. Beyond the administrative realm, she lends her skills to machine maintenance and repairs on the assistant side.
Originally from St. Paul, Minnesota, Linda spent her teenage years in Sand Creek, WI. Intrigued by the dental field. Committed to community service, Linda actively supports various organizations, including the Dodge County Toy Bank, Youth for Christ, PAVE, and more. Linda's goal is to provide patients with a caring and positive dental experience.
Beyond her professional life, she enjoys weekend trips, biking, hiking, and exploring new areas with her husband. Family is paramount, and she relishes spending time with her four grandchildren.
Amber Nettekoven
Dental Assistant
Meet Amber, a skilled dental assistant working to fulfill patients' dental needs. Born and raised in Beaver Dam, WI, Amber's journey in dentistry has been shaped by over 20 years of on-the-job training.
While her college background isn't dental-related, Amber's dedication to continuous learning is evident as she embraces new techniques and materials every day. With a firm belief that prevention is the key to a healthy smile, she is committed to helping patients achieve optimal dental health.
Beyond her professional life, Amber finds joy in outdoor activities like kayaking, swimming, hiking, and enjoying vacations.
Kristina Pufahl
Dental Assistant
Meet Kristina, a Certified Dental Assistant dedicated to providing compassionate and high-quality patient care under the doctor's direction. Kristina's journey into the dental field began at a high school trade show, where she immediately recognized her passion for the profession. She earned her certification through DANB and Madison Area Technical College.
Kristina appreciates the dynamic nature of her role, relishing the uniqueness of each day and the opportunity to provide individualized care tailored to each patient's needs.
Beyond her professional life, Kristina enjoys taking walks and boating with her family.
Cindy Rabata
Dental Hygienist
Meet Cindy, a dedicated dental hygienist born and raised in Beaver Dam and currently residing there. Married with a son. Cindy takes pride in, making their office an enjoyable place to work.
Passionate about helping patients achieve a healthy mouth, Cindy values continuous learning and growth. She appreciates the opportunities for ongoing education provided by the office, which is committed to delivering high-quality patient care. Cindy has volunteered for Mission of Mercy dental events in Wisconsin and Minnesota, offering free dental care to those in need.
Beyond her professional life, Cindy loves engaging in outdoor activities like biking, hiking, kayaking, and attending Badger games with friends. In the winter, she enjoys skiing in Michigan and snowshoeing.
Cassandra Martin
Admin Team
Meet Cassandra, the NP Coordinator who serves as the welcoming face at the office, guiding patients through tours, paperwork, scheduling, and treatment plans. Passionate about patient care, Cassandra's journey into the dental field started with a billboard while traveling. Cassandra is committed to creating an inclusive and welcoming environment, ensuring each patient feels valued and heard. Involved in Fond du Lac County Humane Society fundraisers and Spinal Muscular Atrophy fundraisers. She understands the impact of a positive first experience on a patient's health and well-being.
Born in Washington State and raised in Northern Wisconsin, Cassandra currently resides in Hartford with her significant other, daughter, and golden retriever, Kobe.
Beyond her professional life, Cassandra loves to travel and explore Wisconsin, indulging in supper clubs. She finds joy in spending time with loved ones.
Alli Moser
Admin Team
Meet Alli, the friendly face behind the scenes at our dental practice. As a valued admin team member, Alli specializes in ensuring a smooth and stress-free dental experience for patients. Handling various front-end responsibilities, she is particularly skilled in insurance verification and billing, guaranteeing a seamless process before and after each visit. Alli also lends her expertise to managing the practice's social media presence.
Originally from the Hartford area and now residing near Horicon, Alli's journey into dentistry began at an orthodontic office, and she has since developed a deep love for the field. Her greatest satisfaction comes from putting patients at ease, especially considering the anxiety often associated with dental visits.
Beyond her professional life, she enjoys shopping and treasures moments spent with friends and family.
Jennifer Stam
Dental Assistant
Meet Jenny, a dedicated dental assistant with 28 years of experience, assisting the doctor during procedures and ensuring the smooth flow of hygiene schedules. Jenny finds joy in helping fearful patients overcome their dental anxieties and leave with a smile.
Married for 27 years with four beautiful children and a dog named Butkus.
Beyond her professional life, Jenny treasures moments with her family and their beloved dog. With a passion for gardening, motorcycle rides, and outdoor activities in the summer.
Emilie Stam
Dental Assistant
Meet Emilie, a dedicated dental assistant who grew up in Horicon, Wisconsin. As the second oldest of four kids, Emilie found inspiration in her mother, who also works at the same office. Witnessing her mother's passion and pride in the dental field motivated Emilie to follow in her footsteps.
Emilie shares her mother's love for dental assisting and thrives in the teamwork dynamic. Whether the day goes as planned or presents unexpected challenges, she enjoys working together to overcome obstacles.
Beyond her professional life, Emilie finds comfort in staying home and cuddling with her cat, whom she considers her best friend.
Rita Sieniawski
Dental Assistant
Meet Rita, a dedicated dental assistant working alongside Dr. Borja, committed to helping patients achieve better oral health and overall well-being. Hailing from Rhinelander, Wisconsin, Rita's experience with oral surgery and orthodontic treatment as a teenager sparked her curiosity and led her to a fulfilling career in dentistry.
In 2010, Rita earned her Dental Assistant technical diploma from Madison College, subsequently achieving Certified Dental Assistant status in 2012. She considers her career in dentistry a privilege, cherishing the opportunity to contribute to patients' oral health journeys.
Beyond her professional life, Rita enjoys cooking and spending quality time with her family.