Meet the Doctors

Dr. Brent Kolb

Dr. Kolb established Dexter Family Dentistry (“DFD”) in late 2006. The first staff member was hired in February 2007, and in March, Dr. Kolb and DFD saw their first patient. DFD in its current state is a culmination of the expertise and life experiences of Dr. Kolb, his associates, and the entire team. Together, they strive to go “above and beyond” to provide quality dental care in a comfortable environment, paying particular attention to the needs of each individual patient.

Dr. Kolb, currently an adjunct clinical professor at the University of Michigan School of Dentistry, graduated in 2003 from The Ohio State University College of Dentistry. In June 2004, he completed one year of Advanced Education in General Dentistry at University of Michigan. In 1997, he graduated from Miami University with dual degrees in Chemistry and Mathematics. For two years, he worked as a researcher for Proctor and Gamble in Cincinnati, Ohio.

The advanced training Dr. Kolb received during his residency and throughout his career have honed his skills in esthetic dentistry, direct cosmetic bonding and veneers, crowns, bridges, implant restorations, and removable dentures.

Dr. Kolb is happily married to his college sweetheart Liz, and lives in Ann Arbor with their daughter, Meghan and their son, Sam.

Professional Affiliations


Dr. Dorothy “Dottie” Ruhlig

Dr. Ruhlig joined the team at Dexter Family Dentistry in 2013. In the time since, she has truly enjoyed the relationships that develop while serving our patients oral health needs. She is passionate and focused on providing exceptional dentistry in an atmosphere that is safe, comfortable and centered on individualized patient care.

Dr. Ruhlig graduated from the University of Michigan School of Dentistry in 2012. She was awarded the Francis B. Vedder Society Award, given annually to the top senior dental student in Crown and Bridge Dentistry. Considering herself a life long student, Dr. Ruhlig has continued her professional education primarily through the Spear Education curriculum, Chicago Midwinter Meeting, and Washtenaw District Dental Society study clubs. She has specific interests in cosmetic dentistry and integrating oral and systemic health in adult patients as well as managing anxiety and behavior in our pediatric patients. In the past, Dr. Ruhlig has served as an adjunct clinical professor at the UM School of Dentistry.

Originally from Madison Heights, MI, Dr. Ruhlig earned her Bachelor of Science in Brain, Behavior and Cognitive Science from the University of Michigan. During school, she was involved in The Detroit Partnership and developed a passion for volunteering and serving those who are vulnerable and disadvantaged. She met her husband, Aaron, while planning a mission trip to provide dentistry in Uganda. In her free time, she loves to travel, read, and spend time with her friends and family, as well as anything that gets her outdoors!

Professional Affiliations


Dr. Derek Robison

Dr. Robison joined the team at Dexter Family Dentistry five years ago and has been a tremendous asset. He began by leveraging his expertise in process improvement, project management, and logistical operations to improve systems and efficiency at our office.

In May 2016, he graduated from University of Michigan School of Dentistry and was recognized for academic excellence by the American Academy of Implant Dentistry. In June 2016, he joined our team as an associate dentist. He strives to stay abreast of the newest technology and research in all facets of general dentistry, with particular focus in treatment planning, esthetics, and implants. He is a member of Spear Education, a world-renowned education resource in dentistry. He enjoys connecting his previous engineering career with dentistry through application of Six Sigma and Lean methodologies to improve clinical outcomes, practice efficiency, and patient comfort.

Dr. Robison completed his Bachelor of Science in Manufacturing Engineering at Ball State University and had a twelve-year career in the automotive industry before making a career change to dentistry. He graduated from Lumen Christi High School in Jackson, MI, and lives in Saline with his wife and two teenage daughters.

Professional Affiliations