North Sioux Dental Clinic

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 Morepatients of all ages and holds a special interest in providing care to pediatric and special needs patients in a hospital setting. His interests outside the clinic include playing basketball, biking, and photography. He and his wife, Sheri, have three incredible grown children and two wonderful daughters-in-law. The Cork’s are very active in their church and have enjoyed living in Siouxland since 1991. Read Less

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 working out. The McKenna family embraces being part of the Siouxland Community and what it has to offer. Read Less

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 Moreide comprehensive care for patients of all ages. He is a member of Spear Education and graduated from the National Oral Health Leadership Institute. He enjoys spending time with his family and is an active member in his church. In his free time, he follows sports, current events, and the latest science in dentistry. Dr. Tjeerdsma is excited to be a part of Siouxland and all it has to bring. Read Less