Your Dental Team

Our Team Created Mission:

Inspire our community to have healthy, beautiful smiles through quality dental care and education for life.

Dr. Kirstina Gratz, Dentist


  • Doctor of Dental Surgery
    2011, University of Iowa College of Dentistry, Iowa City, IA
  • Bachelors of Arts in English
    2007, University of Iowa Liberal Arts College, Iowa City, IA
  • High School Diploma
    2002, Iowa City City High, Iowa City, IA


  • American Dental Association
  • Academy of General Dentistry
  • Iowa Academy of General Dentistry
  • Iowa Dental Association
  • American Orthodontic Society

You might want to know…

At the age of 16, Dr. Gratz started working as a dental assistant for her mother, Dr. Carol Moreno in West Liberty, IA. After one summer, she knew that she wanted to work in a dental office for the rest of her life.

“Being one-on-one with patients and helping them to have healthy, beautiful smiles is a calling for me.”
-Dr. Gratz


Dr. Gratz’s main hobbies include running and singing, but she also enjoys reading, biking, swimming, cooking, sewing, traveling, and much more.

Dr. Rollman, Dentist


  • Doctorate of Dental Medicine
    2017, Midwestern University, Glendale, AZ
  • Master’s of Arts, Biomedical and Health Ethics
    2013, Arizona State University, with honors, Tempe, AZ
  • Bachelor of Science in Pre-Professional Health
    2012, Arizona State University, Phoenix, AZ, Summa Cum Laude
  • High School Diploma
    1997, Desert Mountain High School, Scottsdale, AZ


  • American Dental Association
  • Academy of General Dentistry
  • Iowa Academy of General Dentistry
  • Iowa Dental Association

You might want to know…

Dr. Rollman was an entrepreneur in his earlier career. He owned several construction companies and invested in real estate. He found this work did not fulfill him, and he wanted to find something more rewarding. Volunteering at a free dental clinic for the homeless changed his life forever, and he began his new journey in life. He has since focused his time and energy on helping those around him to be their best, most notably through dentistry. Dr. Rollman is an avid supporter of living a healthy life and enjoys weight training, yoga, trail running, cooking healthy food, and brushing & flossing. He can often be found reading, watching movies so he can later quote all their funny lines, or finding his way to the nearest beach. He also enjoys golfing, video games, camping and hiking, board games, and playing with technology.

Dr. Trumann Johnson, Periodontist


  • Masters of Science, Oral Biology
    1996, University of Nebraska, Omaha, NE
  • Periodontal Certificate
    1996, University of Nebraska, Lincoln, NE
  • General Practice Residency
    1992, V.A. Hospital, Minneapolis, MN
  • Doctor of Dental Surgery
    1992, University of California San Francisco, San Francisco, CA
  • Bachelor of Arts, Management Science
    1986, University of California San Diego, San Diego, CA
  • High School Diploma
    1980, Servite High School, Anaheim, CA

You might want to know…

Dr. Johnson specializes in care for the gums and bones that support the teeth. He provides specialty services for our patients and sees referrals from other area general dentists.

He is a great addition to our practice and saves our patients time and money so they don’t have to travel to Des Moines or Iowa City for specialty services.

Refer your patients to Dr. Johnson >

Ryan Gratz, Office Manager


  • Bachelors of Arts Degrees in Elementary Education/Liberal Arts
    2004, Simpson College, Indianola, IA
  • High School Diploma
    2000, Harmony High School, Farmington, IA

You Might Want to Know…

Ryan’s mission is to make your goals for your mouth a financial reality. Ryan works with a range of financial tools to allow you a flexible approach in achieving your oral health.

Ryan and Kirstina Gratz have been married since 2008. Ryan is an avid runner, qualifying for the Boston Marathon twice. He also enjoys biking, coaching, and spending time with friends and family.

Nervous? Don't be!


Dr. Gratz puts patients first. She is here not just to recommend needed treatment, but also to care for your overall health and well-being. She takes time to discuss what your dental issues are and ways that they can be prevented in the future.


We are not just dental professionals, but parents and children also. We know how important your family is to you, which is why we enjoy seeing patients from every age group, including the very young (age 1) to the very wise.


Davis County Dental uses the latest technology in dental records and patient education for your safety and care. This includes 32-inch flat screen TVs for viewing your x-rays, records, dental education materials, as well as pre-recorded television shows. This also includes the most accurate digital x-ray system available for intraoral imaging.


It takes a team to ensure you have a unique and pleasurable dental experience. We are proud that every person in our office contributes to your care.


Davis County Dental also offers nitrous oxide sedation, or laughing gas, for those patients that are still anxious about treatment.  This very safe gas is breathed in before and during treatment and aids in reducing anxiety.  If desired, Dr. Gratz may add an oral sedative for those with severe phobia.

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Pay With Ease

We offer Care Credit Card:
special financing every time you use it, low monthly payment options, no up-front costs or pre-payment penalties!

more about Care Cresit card

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Or call us at 641-664-1121