spirit lake iowa dental


Below is information about the team at Spirit Lake Dental.  We look forward to meeting you in person!

Dr. Michael CrippenDr. Michael Crippen | Spirit Lake, IA Dentist

Dr. Crippen has lived all over the United States, and across the globe, including Germany. He graduated from Woodbridge Senior High School in Virginia and later pursued his Bachelor’s of Science and Microbiology from Weber State University as a first-generation college graduate. During his time at Weber State University, he was awarded a prestigious award for Microbiology.

After working in the field for several years, Dr. Crippen got married and soon after decided that he wanted to pursue a degree that mattered and one that would help people. He decided to go into Dentistry, studying at Case Western Reserve University School where he received his Doctorate of Dental Medicine in 2018. Through a conservative dental approach, Dr. Crippen is very interested in educating a patient on how to be an active team player in their dental health. He wants his patients to understand that he is their advocate and friend in dentistry.

Dr. Crippen loves to sing, and spend time with his family and children. He is enthusiastic about researching and learning about family history and even discovered that one of his grandparents was married an hour away from Spirit Lake. If you pay attention, you might hear him singing while he works!


Tammy Riesberg, Office Manager

Tammy RiesbergTammy has lived in Spirit Lake, IA for over 20 years and is originally from Carroll, IA. Tammy and her husband, Mick, have three children and several grandchildren.

Tammy got her education from Des Moines Area Community College and has been working in Dental Management for nearly two decades. She loves the daily interactions with patients and the rest of the team. Her mission is not only to make patients as comfortable as possible but also to educate patients to make the best choice for their own oral health care. Her passion has led her to become a member of the American Association of Dental Office Managers.

When Tammy is not working at Spirit Lake Dental, she is often on the golf course or on a boat. When the weather isn’t right for either of these outdoor activities she also enjoys pottery.

Christina Syharath,  Expanded Functions Registered Dental Assistant

Christina Syharath newBorn in Freemont, NE, and raised in Spirit Lake, lA. She has a son and daughter. Her family includes her parents and 2 brothers.

She attended Spirit Lake High School and went on to graduate from the University of Northern Iowa as a Communications major with an emphasis in Business and Tourism. Her desire to learn, as well as her compassion for people, drove her interest to pursue additional coursework, and in turn aide in self-improvement of others in areas ranging from professional development in marketing, coaching in the workforce, and conflict management. She has been a member of our team since October 2011. Christina is a quick learner and not afraid to try new tasks. She cares for patients as though they are family. Her kind nature, soothing voice, and her welcoming smile are her genuine characteristics our team and patients experience on a daily basis.

She has volunteered with the Special Olympics, food drives, and the American Heart Walk. Hobbies include skiing, bike riding, rollerblading, hiking, racquetball, painting, and watching football. Her main enjoyment comes from helping her children grow into young adults.

Shannon Olson, Registered Dental Hygienist

Shannon Olson newShannon is a graduate of the University of Kentucky’s Dental Hygiene program. She has over 20 years experience in treating patients in both general and periodontal practices. Shannon is a mother of three.

 Ashley Hass, Registered Dental Assistant

Ashley Hass newAshley is a graduate of Western Iowa Tech Dental Assisting Program. She enjoys working with patients and making them feel great about their oral health. In her free time Ashley loves reading, spending time with her family, fishing, and baking.