• Richard D. Downs, D.D.S

  • Aaron J. Rauen, D.D.S

  • Jack E. Osterhaus, D.D.S

(563) 556-8388

Hygiene Department

"The staff makes clients feel as though we are welcome to be in the office. Nothing seems to be too big a problem. We have been very impressed. And grateful for the excellent care"

Crystal Rojemann, R.D.H.
Registered Dental Hygienist
Crystal Rojemann is originally from Potosi, Wisconsin.  She graduated from Potosi High School in 2000 and attended BTC in Janesville, WI for dental assisting.  Crystal worked as a Dental Assistant in Platteville, Wisconsin for two years before attending Dental Hygiene school at MATC in Madison, Wisconsin.  After graduating from Hygiene school in 2005, Crystal worked as a Hygienist for one year in Madison before moving to Iowa.  Crystal currently lives in Dubuque.  In her spare time she spends time with her husband, family, and friends.  Crystal enjoys reading, watching movies, cooking/baking and playing volleyball on the Abbadent Dental volleyball team.


Jan Rober, R.D.H.
Registered Dental Hygienist
Jan graduated from The University of Iowa in 1994 from the Dental Hygiene program. She moved to Dubuque in 2009 from Ames, IA. Jan started with Abbadent as a substitute dental hygienist for three years, and then she joined our team as a full time hygienist in 2013. Jan enjoys getting to know her patients and giving them options for better home care and overall health. She and her husband, Daryl, have three children, Nicholas, Alaina, and Emily. She enjoys bicycling, reading, baking, spending time with her family, and watching Iowa and Iowa State College sports in her spare time.

Kendra Mozena

Kendra Mozena, R.D.H.
Registered Dental Hygienist
Kendra worked as a dental assistant before enrolling in the Dental Hygiene Program at Hawkeye Community College; graduating in 2007. Before joining the Abbadent team in 2014, Kendra worked as a hygienist in a private practice for seven years. Kendra loves getting to know her patients and improving their overall health. Kendra enjoys spending time with her husband Todd and son Porter.


Tara McMullen, R.D.H.
Registered Dental Hygienist
Tara is originally from Dyersville, IA and graduated from Loras College in 2005 with a Bachelor of Arts in psychology. She later went on to dental hygiene school and graduated from Hawkeye Community College in 2012. She worked as a Hygienist in Cedar Rapids for 2 years before joining the team at Abbadent. Tara now lives in Dubuque with her husband Sean and their son Jack. In their spare time she enjoys spending time with her family and friends outdoors as much as possible, working on home renovations and making memories with her family.


Jolene Pfeiler, R.D.A., E.F.D.A
Hygiene Assistant
Since 1989 Jolene has enjoyed a career with Abbadent Dental Center. She works with our Hygiene Department primarily with children. She also oversees our Teeth Whitening Center; where you can whiten your teeth in just over an hour. In her free time, she enjoys helping out on her family’s farm and horseback riding with my husband and two children.