Gary H. Hildebrandt, DDS, MS

Clinical Professor, Department of Restorative Sciences

Gary H. Hildebrandt

Contact Info

Office Phone 612-625-5130

DDS, University of Michigan School of Dentistry, 1981

MS, University of Minnesota School of Dentistry (Restorative Dentistry), 1981

BS, Oakland University (Biology), 1977


Dr. Hildebrandt taught at the University of Michigan School of Dentistry from 1990 – 1996 and at the University of Minnesota School of Dentistry since 1996. Currently, he is the Director of the Division of Operative Dentistry (since 1999) and Course Director for Operative Dentistry I (pre-clinical) and the Operative Dentistry clinical courses. He has developed an Operative Dentistry manual used in these courses that teaches the fundamentals of cariology and single tooth restoration. He is active in teaching at all levels in dentistry: pre-doctoral (didactic, skill acquisition, and clinical), graduate, and post-doctoral (C.E.) training. He has also worked with the Minnesota and North Dakota Boards of Dentistry to provide assessment and/or remediation services for dental clinicians. He also acts a mentor for the Summer Research Fellowship Program.

In 2018, Dr. Hildebrandt became the Clinical Department Editor for Northwest Dentistry, the journal of the Minnesota Dental Association.

Dr. Hildebrandt continues to practice general dentistry part time.

Awards & Recognition

  • Graduated Magna Cum Laude from Oakland University, 1977
  • Inducted into Omicron Kappa Upsilon, Chi chapter (National Honors Society in Dentistry), 1981
  • Elected to Membership in the Academy of Operative Dentistry, 1991
  • Honorary Professor, University of Nicaragua, Leon, Nicaragua, 1992.
  • Bench Instructor of the Year by Junior dental students, 2001


Research Summary/Interests

  • Caries risk assessment and control protocols - especially for aggressive patterns of dental decay
  • Clinical evaluation of the effect of xylitol on mutans streptococci and dental caries
  • Clinical evaluation of chlorhexidine to suppress or eliminate oral mutans streptococci
  • Sustained-release varnishes and varnish coated mouthguards as drug & fluoride delivery devices
  • Comparison of chair-side cultural tests for dental caries
  • Relationship between dental caries and diet
  • Relationships between dental disease and systemic diseases
  • Effects of caffeine on dental caries
  • Association between taste sensitivity and dental caries
  • Assessing effectiveness of teaching methods in dentistry
  • Standardization of evaluators in Operative Dentistry


Hildebrandt G, Larson TD. An Approach to Managing Aggressive Dental Caries. Northwest Dentistry, Nov.-Dec. 2018.

Hildebrandt GH, Belmont MA. Self-Paced Versus Instructor-Paced Preclinical Training in Operative Dentistry: A Case Study. J Dent Educ 2018; 82:1178-1184.

Hildebrandt GH, Tantbirojn D, Auguston DG, Guo H. Effect of caffeinated soft drinks on salivary flow. J Caffeine Res 2013; 3:138-142.

Hildebrandt G, Lee I, Hodges J. Oral mutans streptococci levels following use of a xylitol mouth rinse: a double-blind, randomized, controlled clinical trial. Spec Care Dentist 2010; 30(2):53-58.

Hildebrandt GH and Bretz WB. Comparison of culture media and chairside assays for enumerating mutans streptococci. J Applied Microbiology 2006; 100:1339-47.

Hildebrandt GH and Sparks BS. Maintaining mutans streptococci suppression with xylitol chewing gum. J Am Dent Assoc, 2000; 131:909-916.

Achong RA, Briskie DM, Hildebrandt GH, Feigal RJ, Loesche WJ. Effect of chlorhexidine varnish mouthguards on the levels of selected oral microorganisms in pediatric patients. Journal of Pediatric Dentistry 1999; 21:169-175.

Hildebrandt GH. Effect of repeated treatment with sustained-release chlorhexidine mouthguards on salivary levels of mutans streptococci. Caries Res 1996