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Welcome to Dr. William Kowalski Endodontics


Dr K

Dr. Kowalski (Dr. K) grew up in Burr Ridge IL area. Dr. K now lives lives in Chesterfield with his wife Dr Sarah, a Peodontist (a children's dentist in St Peters),  and their  2 children. We have been in this office 10+ years. On days off Dr. K. enjoys going to church, basketball, baseball, swimming in their pool. Dr. K. and Dr. Sarah enjoy visiting Mackinac Island in Illinois. They are both active volunteers in Albert Pujols Foundation here in St Louis and periodically go on mission trips to the Dominican Republic.


Catherine grew up in the St Louis area. She is married with 2 children and lives in Chesterfield. Received her Dental Assisting training from Missouri College in 2004. Catherine has worked for Dr K 10+ years. Catherine is a clinical dental assistant fluent in all aspects of Endodontic dentistry.  Catherine enjoys being outside, swimming, exercising, playing at the park with her children and the beach.


Kelly grew up in Florida. Received her Certified Dental Assisting Degree from Daytona Beach Community College in 1991. Moved to the St Louis area in 2005. Lives in the Festus area. Kelly's children are her 2 dogs and 3 horses. Kelly has been with Dr K for 9+ years. Kelly works mostly at the front desk, but also assist from time to time. She can assist with any questions about our office, including appointments, billing, insurance as well as assisting the doctor chair side.  Enjoys barrel racing, trail riding, 4 wheeling, beach, swimming, skiing, anything outdoors.