Dr. Zimmermann did work on 4 crowns and one partial. I have had problems with 2 of them in the last year and a half. Per the doctor the work was guaranteed for 5 years, but he wouldn't fulfill the guarantee. The billing practices of this office are horrible. They messed up my FSA and it took nearly a year to get it straightened out. I really felt like it was all about the $$. I would not recommend this dentist to anyone!
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