Meet Our Doctors

Dr. Darrick Zirker

Dr. Darrick Zirker completed his dental training at the University of Iowa in 2007, as well as the advanced general dentistry program at Idaho State University in 2008. Prior to his dental education, Dr. Zirker received his degree in Spanish from Brigham Young University. He is a native Iowan from Dubuque.

Before joining River Ridge Dental, Dr. Zirker served as the director of the hospital dentistry residency program at the University of Iowa Hospitals and Clinics where he instructed residents in both clinical and operating room settings.

He values the personal relationships he builds with his patients and is passionate about advancements in dental technology.

Dr. Zirker and his wife Camille have four daughters and enjoy hiking, biking, and anything outdoors. He also follows college football and loves to cheer on the Iowa Hawkeyes and BYU Cougars.

Dr. Joseph Crippes

Dr. Joseph Crippes graduated from the University of Iowa College of Dentistry in 1988. Dr Crippes completed a Hospital Dentistry Residency at the University of Iowa Hospitals and Clinics in1989. He completed the Straight Wire Orthodontics Certification Program with Dr. Geherty in 1997. Prior to dental school, Dr. Crippes graduated from the College of St. Thomas in St. Paul Minnesota. He is a native Iowan, and grew up in Dubuque.

Dr. Joe, as he is called by patients and staff, is married to Lauren. They have three grown children. The Crippes family celebrated son, Landon’s and daughter Kylie’s weddings in 2021. Outside of the office Dr.Joe enjoys biking, running, golf, spending time with family and supporting the Iowa Hawkeyes.

Dr. Crippes is a member of the American Dental Association, Iowa Dental Association and Linn County Dental Society.

Contact Us

(319) 832-2000

    New Patient?









    Office Hours

    Monday:
    7:00AM - 5:00PM
    Tuesday:
    7:00AM - 5:00PM
    Wednesday:
    7:00AM - 5:00PM
    Thursday:
    7:00AM - 5:00PM
    Friday:
    7:00AM - 12:00PM

    Contact Us