Meet the board

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Drew Christianson, President

Drew Christianson, MDT, CADT has a strong passion for patient centered care and is focused on breaking down barriers to increase access.

Mr. Drew Christianson joined the faculty of the University of Minnesota School of Dentistry in 2014. At the University, he is involved with engaging and teaching students in dental, dental therapy, and dental hygiene in preclinical and clinical settings as well as in the classroom.

Mr. Christianson earned his Master in Dental Therapy from the University of Minnesota’s School of Dentistry, and also completed the Advanced Dental Therapy Certificate Program at the School of Dentistry. As a practicing Dental Therapist, he has been involved in multiple practice types including private practice and large group clinics providing care for a variety of patients.

In his spare time, he enjoys his time with his wife and four children taking vacations, attending sporting events, and being involved in his church.

He currently works as a clinical assistant professor at the University of Minnesota School of Dentistry and is in private practice in Maple Grove, Minnesota.


Danae Seyffer, President Elect

Danae is passionate about increasing access to high quality dental care to underserved populations and is excited to see the profession grow in years to come. In her spare time, she loves traveling the world and spending time with family and friends.

Danae Seyffer was in the inaugural Dental Therapy class at the University of Minnesota School of Dentistry, earning her Master of Dental Therapy in 2011. She is a Clinical Assistant Professor at her alma mater where she teaches dental, dental therapy, and dental hygiene students. She also serves at the advisor for the Dental Therapy Student Association. In addition to teaching, she is an Advanced Dental Therapist at Community-University Health Care Center, a Federally Qualified Healthcare Center in Minneapolis.


Bill Heitzman, Immediate Past President

Bill Heitzman, ADT, currently practices at True North Community Dental Clinic located in Shakopee, Minnesota. This newly formed clinic uses an innovative model featuring an advanced dental therapist as the primary care provider working under general supervision of the collaborating dentist. The clinic exclusively serves patients who are insured through Minnesota Health Care Programs or are uninsured.

Before that, he practiced in rural Grand Marais, Minnesota. As he lived and worked, he found a sense of satisfaction by making relationships and providing care in the community. He also participated in research made possible by the Delta Dental Foundation of Minnesota documenting the impact of integrating a dental therapist into a solo rural private practice. Another contribution he made was with the Oral Health Task Force, a local non-profit that won the MDH Rural Health Team award for its efforts to improve the oral health of children through community oral health efforts.

He earned his Master’s degree in Dental Therapy from the University of Minnesota School of Dentistry in 2012 after working in industry and as a teacher.

Some of his favorite things to do in life are to bike to work, drink really good coffee, spend time with his family doing anything and everything active.

Sheri Solseng Trif, Treasurer

Sheri Solseng Trif, BSDH, MSADT believes in improving oral health access for members within a community. With 20 years of experience as a dental hygienist, Sheri’s professional growth as a dental therapist further expands her role to improve oral health. In May 2016, she graduated with a Master of Science in Advanced Dental Therapy from Metropolitan State University. Sheri’s experience as a dental professional has provided care for both rural communities and urban areas with diverse populations emphasizing education, prevention and restorative procedures. Her career has brought her into settings such as Long Term Care facilities, Head Start, WIC, mobile clinics, and public schools where she has provided oral health education and dental care. Sheri is employed by Dental Associates in Savage where she provides quality and affordable care for patients who travel near and far to access dental care.

Sheri lives in Chaska with her husband and three children. Together they enjoy the great outdoors along with trips to her home state of ND.


Karen Bohnen, Secretary

Karen Bohnen is currently working as an advanced dental therapist at Dental Associates in St. Paul, Minnesota. She graduated from the dental therapy program in December of 2014 from the University of Minnesota School of Dentistry in Minneapolis, Minnesota. Karen volunteers through Common Hope, an organization that promotes hope and opportunity by partnering with families and communities to improve their lives through education, healthcare, and housing. Through this organization, she travels to Guatemala once a year to provide dental services and help improve the oral health of families affiliated with Common Hope. She sits on the School of Dentistry Alumni Society board as a dental therapy representative. She currently serves as the Secretary for the Minnesota Dental Therapy Association. Karen resides in Maplewood, Minnesota.