Meet the

Dr. Joshua M. Renken

Dr. Joshua Renken, a central Illinois native, attended Eastern Illinois University and then the University of Illinois at Chicago where he received his DDS degree. Following associate work in Chicago, Dr. Renken moved to Springfield and opened his first practice, Renken Dentistry, in 2003.

His commitment to continued professional growth has awarded him fellowships from both the White Cap Institute as well as the International Congress of Oral Implantologists.

At Renken Dentistry, Dr. Renken was voted best dentist in Springfield among The State Journal-Register’s readers in 2014 & 2015.

In his commitment to organized dentistry, Dr. Renken just finished his tenure as 2014-2015 President of the GV Black Dental Society. At a state level, Dr Renken is a member of the communications committee of the Illinois State Dental Society. Dr Renken also holds professional memberships in the Academy of General Dentistry, a Fellow of the International College of Oral Implantologists, and as a member of the Chicago Dental Society and the American Dental Association.

Dr. Renken is deeply dedicated to our community, specifically the success of children and families facing the challenges of developmental and neurological differences. He has been a long time member of the board of The Hope Institute for Children and Families and currently serves the organization as chairman of the board of directors. Renken Dentistry has been a pilot site for Hope’s Vocational Program. This partnership has made it possible for the dental practice to meaningfully employ and support a team member with developmental differences. Dr. Renken is also a member of the Ambassadors of Hope, a volunteer group of business leaders who serve as advocates for The Hope Institute and the children and families it serves. Dr Renken is a member of the Springfield Chamber of Commerce, Chatham Chamber of Commerce, and Local First Springfield. He most recently joined the Young Philanthropists, a group organized by the Community Foundation of the Land of Lincoln.

Over the course of the last five years, Dr. Renken established and owns Renken Properties LLC — a properties company, PracticeWater — a practice management services company, and a second dental practice, schön dental. His web-based patient subscription management platform, Health Assurance Plan, is a member of the Springfield startup incubator “Innovate Springfield”. Dr. Renken most recently added author to his resume, with his first book, “Dr. Fries-With-That”. His goal is to help dental teams create greater health for their patients, team members, and practices.

Dr. Renken and his wife, Leigh have four children: Reilly, Miles, Oscar and Lorelai.

Connect with Dr. Renken on

Dr. Joshua M. Renken

Dr. Karen Zerkle

Dr. Zerkle is a native of the Springfield area, attending Rochester High School, the University of Illinois at Urbana-Champaign, and then graduating from Southern Illinois University School of Dental Medicine. The transformation of her own smile sparked Dr. Zerkle’s interest in dentistry. Improvement in her self-esteem inspired Dr. Zerkle to help create that confidence and self-assurance for others. It is the interaction with people, use of knowledge and hand skills, and facing new challenges daily that keeps dentistry interesting for Dr. Zerkle. She is known her for quick, easy & comfortable dental experiences. Dr. Zerkle is part of the American Dental Association, The Illinois State Dental Society and is a board member of the GV Black Dental Society.

When not providing dental care, Dr. Zerkle can be found on the golf course, in a CrossFit gym, boating, bike riding, relaxing at home with her husband Adam and their two Jack Russell terriers, or simply spending time with friends and family.

Connect with Dr. Zerkle on

Dr. Karen Zerkle

Dr. Maggie Schaefer

Dr. Maggie Schaefer is native to Springfield, Illinois where she went to high school,  University of Illinois at Urbana-Champaign for undergrad, and Southern Illinois University School of Dental Medicine for dental school. She has wanted to be a dentist for as long as she can remember. In fact, she drew a picture of herself as a dentist in 3rd grade! She was the rare child who looked forward to going to the dentist. Visits to the dentist were always a positive experience for her, and now she has the opportunity to make your experience as enjoyable as hers.

Dr. Schaefer’s goal is to make sure patients of all ages have a positive experience at the dentist. Her expertise and compassion have made her popular with our patients! Some of her favorite procedures include crowns and dental implants. It’s always her goal to provide comfortable, effective local anesthesia when it’s needed. Whether the procedure is general or cosmetic dentistry, she’s dedicated to making sure the patient leaves with a smile.

As an Executive Board Member of the GV Black District Dental Society, member of Young Philanthropists, and ambassador of HOPE, Dr. Schaefer is very involved in the local community. She loves to cook (don’t tell anyone she learned everything she knows from the Food Network!) and exercise, but she and her husband Keenan spend most of their time outside of work with their new baby girl, Harper Rose.

Connect with Dr. Schaefer on

Dr. Maggie Schaefer

Dr. Sean Crawford

Gentle, Caring, Funny And Thorough— These are ways in which Dr. Crawford is often described by patients. He is well regarded by his patients for his thoroughness and putting the needs of his patients first.

Dr. Crawford graduated in 2017, obtaining his DMD degree from the Southern Illinois University School of Dental Medicine. Dr. Crawford spent the summer of 2016 providing free tooth extractions, fillings and crowns to the residents of Kew Park in Jamaica. Dr. Crawford specializes in helping patients with dental anxiety and enjoys working with children.

He and his wife Denysha, along with their daughters Kynnedi and Emeri reside in Chatham. His hobbies include playing golf, working out, spending time with his friends and family and being an active member in his church community.

Connect with Dr. Crawford on