At the office of William J Kowalski DMD MS LLC, we greatly value our patients’ feedback! We invite you to read our current reviews, so you can have a better idea of the quality care we provide. And if you would like to schedule an appointment with our endodontist in Fenton, Missouri, please give us a call today!

Dr. Kowalski and his staff are so amazing!! I was terrified of having a root canal, and he made it so easy and PAIN FREE!! I was 100% impressed with his knowledge, compassion, and he is hysterical to listen to while he is working on your teeth. He made a scary procedure quick and painless, I will recommend him to anybody!!A Google User

Dr. William J Kowalski is the best, I say again, the best Endodontist there is in St. Louis. Don’t cut yourself short and go anywhere else. He made complex procedure seem like walk in the park.Dominic M.

Dr. Kowalski was conservative in treating my 12-year-old son’s tooth. Patiently explained everything he was doing and made my son feel comfortable.  He cared enough to try to save a tooth with a conservative procedure instead of making a lot more money by performing a more invasive treatment. Brenda S.

I have been to many dentists over my lifetime. Dr. Kowalski is miles above them all. His expertise has saved me thousands of dollars. In my case he had to clean up a botched procedure done by another dentist. I can’t say enough good things about Dr. Kowalski. He is truly the best!Kate S.