Meet our team

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Dr. Don Cork Read Bio

Dr. Don Cork graduated from Baylor University and the University of Texas Health Science Center in San Antonio, TX. He served in the US Navy as a dental officer for three years before transferring to the Indian Health Service. He worked on the Winnebago Indian Reservation for 5 years before opening the North Sioux Dental Clinic in 1996. Dr. Cork has completed over 2,300 hours of advanced continuing education covering all facets of restorative dentistry. He enjoys providing comprehensive care to ...Read More

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Dr. Ryan McKenna Read Bio

Dr. Ryan McKenna is a native of Sioux City, graduating from East High School. He attended the University of Iowa for undergrad and the University of Iowa College of Dentistry. He has extensive experience in cosmetic, pediatric and oral surgery. Dr. McKenna is a member of the American Dental Association and the Sioux City Dental Society. Dr. McKenna enjoys spending time with his three children, who keep him busy in many sporting and school activities. He also enjoys biking, running road races and...Read More

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Dr. Kenneth Tjeerdsma Read Bio

Dr. Kenneth F. Tjeerdsma is a native of Sioux City, graduating from Siouxland Christian School, and is the son of the late cardiologist Dr. Kenneth A. Tjeerdsma. He attended Creighton University for both undergraduate and dental school. He has worked at Promise Community Health Center for nearly 8 years before transitioning to North Sioux Dental Clinic. Dr. Tjeerdsma has a passion for educating patients. He has considerable experience in restorative dentistry and oral surgery and strives to prov...Read More

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Services we provide

At North Sioux Dental Clinic we strive to provide our patients with the best and most complete dental care. Our doctors and staff frequently attend continuing education seminars to learn the latest dental techniques. Here are some of the services we provide, please click here.

Payment Forms

We offer a number of convenient payment options for our patients which make it easy to afford any care you may need.

Languages Spoken

  • English
  • Spanish