Meet The Doctors


Dr. David Guilbeault, DMD

My Mission:

"To provide excellent dentistry and to help my patients achieve and maintain a healthy, brilliant smile. When patients leave my office, I want them to know that I am a gentle caring dentist who is always looking out for their dental needs and the needs of their families as well."

Education & Professional Memberships:

Dr. Guilbeault received his undergraduate degree from Illinois Benedictine University in Lisle, Illinois and his Doctorate Degree from Southern Illinois University School of Dental Medicine.

Dr. Guilbeault is an active member of the Delta Sigma Delta dental fraternity, the American Dental Association, the Academy of General Dentistry, the Illinois State Dental Society, the Madison County Dental Society, the Christian Medical Dental Society, International Association for Orthodontics, International Congress of Oral Implantologists, American Dental Society of Anesthesiology. Dr. Guilbeault is Advance Cardiac Life Support certified as well as IV Sedation certified. He has also been a part time faculty member teaching in the department of oral surgery for over a decade at Southern Illinois University School of Dental Medicine in Alton, Illinois.

Personal Attention Professional Excellence:

"It is critical to understand what a patient needs as well as wants and to adequately manage any dental anxiety. For this reason, I strive to continually better myself and my abilities so I may increase my patients' satisfaction. I will always be caring and considerate of my patients. Whether going to the dentist is no big deal or it gives you feelings of anxiety, we have the ability to treat you comfortably. I love being a dentist and look forward to going to work today as when I first started my career. It is very rewarding to transform a patient's dental health through treatment and education.”


Dr. Dustin Simpson, DMD

Dr. Dustin Simpson maintains a patient-centered philosophy, which affirms that every patient deserves special and individualized care to meet their dental needs and goals. This patient-focused approach to oral wellness involves listening to each individual patient, responding with honesty and providing excellent dental care.

Dr. Simpson was born and raised in the Metro East. He went to college at Webster University in St. Louis, MO where he obtained his Bachelor of Science degree in Biology. After graduating college, he attended Southern Illinois University School of Dental Medicine in Alton, IL. There Dr. Simpson earned his Doctor of Dental Medicine (DMD) degree.

In addition to his degree, Dr. Simpson is a member of the American Dental Association and the Illinois State Dental Society. Outside of practicing dentistry, Dr. Simpson enjoys spending time with family and friends, being active in the community, and playing golf.

Dr. Simpson welcomes the opportunity to provide you and your family lifetime dental care in a welcoming and comfortable environment.


Dr. Meredith "Mimi" Kunzeman, DMD

Dr. Meredith “Mimi” Kunzeman is passionate about helping patients achieve healthy smiles. She is committed to developing relationships with patients and providing the best treatment in a friendly and professional environment.

Dr. Mimi grew up in Springfield, IL, where she joined a young dental explorers group at the age of twelve. She knew from a very young age that she wanted to become a dentist, and she worked hard throughout her education to achieve her goal. She is beyond appreciative for many great friends and mentors in the dental profession who have helped and supported her along her path to becoming a dentist.

She received her Bachelor of Science Degree in Biological Sciences from the University of Missouri in Columbia, MO. Upon graduating college with honors, she attended the University of Louisville School of Dentistry, where she earned her DMD degree. Wanting to further her dental education, she completed an Advanced Education in General Dentistry residency from Southern Illinois University School of Dental Medicine in Alton, IL, where she focused on pediatric and surgical aspects of dentistry.

Dr. Mimi is a member of the American Dental Association, the Academy of General Dentistry, the Illinois State Dental Society and the Missouri Dental Association.

One of the most fulfilling aspects of being a dentist is combining art and science to help others’ self-esteem. Dr. Mimi feels fortunate to be a part of the dental profession. She welcomes the opportunity to meet new patients and help them achieve their best smiles and overall dental health. 

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Hours of Operation

Our Regular Schedule

Mid Rivers Dental Group


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-4:00 pm





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