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Ulrich Klein

Distinguished Professor Emeritus

Ulrich Klein
Ulrich Klein

Department of Pediatric Dentistry
13123 E 16th Ave
Box B240
Aurora, CO 80045


Phone: 720-777-2719
Fax: 720-777-7238



  • DDS, University of Nebraska
  • Fellowship in Pediatric Dentistry, University of Illinois at Chicago
  • Residency in Pediatric Dentistry and MS Degree, University of Iowa
  • Residency in Orthodontics, University of Giessen (Germany)
  • Doctoral Thesis, USA PhD equivalent, University of Giessen
  • DMD, University of Giessen

Honors and Awards:

  • Delta Dental of Colorado Endowed Chair in Pediatric Dentistry, July 2016
  • Orthodontics Section Editor, Pediatric Dentistry (2015 - 2018)
  • Fellow of the American College of Dentists (FACD), 2013
  • Honorary Alumni Award, University of Colorado School of Dental Medicine, 2009
  • Member, Omicron Kappa Upsilon National Dental Honor Society, 2008
  • Parent-to-Parent Organization: "Professionals Who Care" Award, 2008


  • University of Colorado School of Dental Medicine
  • Children's Hospital Colorado

Research Interests:

  • Nitrous Oxide
  • Assessment of stressors for patients and providers during dental treatment
  • Tooth Anomalies
  • Curriculum Design

Recent Publications:

Klein U, Paimagham B, Blumhagen R, Kroehl M, Sain J. Pyramidal and Taurodont Molars and their Association with Other Tooth Anomalies. Pediatr Dent 2017; 39(1):46-52.

Gandhi RP, Klein U, Stevens-Johnson Syndrome: A Review and Report of Two Cases. Pediatr Dent 2017;39(1):E9-E14)

Klein U. Guest Editorial: Closing the Gap to Medicine: Calls for Ranking Pediatric Dentistry Residency Programs in the U.S. Pediatr Dent 2016;38(5):362-3.

Klein U, Alford JA, Allshouse A, Sain J. Maxillary Nine-year Molars: Prevalence and Associated Dental and Medical Conditions. Pediatr Dent 2016;38(3):198-202. PMID: 27306243

Klein U, Managkil R, DeWitt P. Parents' Ability to Assess Dental Fear in Their Six- to 10-year-old Children. Pediatr Dent 2015;37(5):217-22.  PMID: 26531086

Gandhi R, Klein U. Autism Spectrum Disorders: An Update on Oral Health Management. J Evid Base Dent Pract 2014 Jun; 14 Suppl:115-26. PMID:2492959

Klein U, Storey B, Hanson PD. Benefits of externships with pediatric dentistry programs for potential residents: program directors' and current residents' perceptions. J Dent Educ. 2014 Mar;78(3):473-80. PMID: 24609349

Klein U. Chapter 15: N2O/O2 Sedation in Pediatric Dentistry. In: Clark/Brunick: Handbook of Nitrous Oxide and Oxygen Sedation, 4th ed. 2014; Elsevier, St. Louis, MO.

Klein U, Chapter 17: Oral Medicine and Dentistry; p 465-476, Current Diagnosis & Treatment Pediatrics, 21st ed. McGraw Hill Medical Textbook, 2012

Klein U, Facial Swelling and odontogenic Infections; pages 94-99, Berman's Pediatric Decision Making, 5th ed. Elsevier Mosby 2011

Greene AE, Roosevelt GE, Grubenhoff JA, Klein U. Little boy black and blue. Pediatr Emerg Care. 2011; 27 (8): 758-9. PMID: 21822090

Khaled J, Klein U, Meinke D. Assessment of Noise Exposures in a Pediatric Dentistry Clinic. Pediatr Dent. 2011; 33: 342-7. PMID 21903003

Klein U, Robinson TJ, Allshouse A. End-Expired Nitrous Oxide Concentrations Compared to Flowmeter Settings During Operative Dental Treatment in Children. Pediatr Dent. 2011 Jan-Feb;33(1):56-62. PMID 21406149

Klein U, Hunzeker C, Hutfless S, Galloway A. Quality of anesthesia for the primary anterior maxillary segment in pediatric patients: Comparison of the P-ASA nerve block using the CompuMedTM delivery system with traditional supraperiosteal injections. J Dent Child 2005; 72:119-25. PMID 16568918