About Our Doctor



Iowa City, Iowa’s Top choice for Clear Braces and Invisalign

Dr. Mergen is devoted to creating amazing, “Mergen Orthodontic Smiles”.  His signature smiles are said to change the life of his patients.  He is known for his dedication to providing patients with exceptional service and advanced clear options that always exceed their expectations.  Dr. Mergen creates a fun, relaxed environment where patients love to visit.  The treatment options that Dr. Mergen offers are less obtrusive (clear) and he operates in a very efficient manner in order to make orthodontic treatment, “short and sweet”.  Being a second generation orthodontist, Dr. Mergen has followed in his father’s footsteps in providing excellent care to every patient.  He helps to change his patients lives by improving their smiles which improves self esteem!  He helps mentor high school teens that have interest in the field of orthodontics by allowing job shadowing in his practice.  Dr. Mergen finds great joy in showing his patients their original photos to see their reaction on the day the braces come off.  It is an amazing transformation…so much more than just a smile!

Outside the office

Dr. Mergen loves having fun and spending time with his wife and two boys. His favorite sports are windsurfing, surfing, kiteboarding, wake boarding, boating, snowboarding, and snowmobiling.

Background and Education

Dr. Mergen’s interest in orthodontics started in high school when he made retainers in his father’s orthodontic practice.  He was so excited about the field of orthodontics, he committed to an accelerated 3 year honor program at the University of Iowa College of Dentistry. He earned his Doctor of Dental Surgery from the University of Iowa in 1995, graduated with honors and 2nd in his class of 87.   Then, Dr. Mergen accepted 1 of 5 spots into the top orthodontic graduate program in the country at the University of Iowa College of Dentistry and earned his Master’s in 1997. Dr. Mergen is dedicated to advancing orthodontic care and service for his patients.  His has a specialized interest in Invisalign orthodontics earning him the Elite Invisalign Specialist status.

Academic Awards
  • Omicron Kappa Upsilon Honor Dental Society
  • American Academy of Esthetic Dentistry Student Award
  • American Academy of Prosthodontics Dentistry Student Award
Professional Associations
  • American Association of Orthodontics
  • Iowa Society of Orthodontics
  • Midwest Society of Orthodontics
  • American Dental Association
  • University Orthodontic Society
Professional Publications​​
  • Author:
    “Treatment outcomes of growing Class II Division 1 patients with varying degrees of anteroposterior and vertical dysplasias, Part 2. Profile silhouette evaluation.” American Journal of Orthodontics & Dentofacial Orthopedics  125 (4): 457-462,  2004.
  • Co author:
    "Evaluation of profile esthetic change with mandibular advancement surgery," American Journal of Orthodontics & Dentofacial Orthopedics 117(6), 2000.
  • Case Publication:
    “Treatment of a Class III malocclusion with maxillary constriction and an anterior functional shift”
    This case was chosen by the CDABO student case selection committee for publication in the AJO/DO. (Am J Orthod Dentofacial Orthop 1999;116:324-8)
At a Glance​​
  • Specialty:
    Elite Invisalign Specialist
    AcceleDent Specialist
  • Degrees:
    Doctor of Dental Surgery (DDS)  - University of Iowa College of Dentistry
    Masters of Science in Orthodontics (MS)  - University Iowa College of Dentistry
  • Residency:
    Orthodontics & Dentofacial Orthopedics  - University of Iowa College of Dentistry
  • Certification and Masters:
    American Association of Orthodontics
  • Publications:
    American Journal of Orthodontics & Dentofacial Orthopedics (1999, 2000, 2004)