Photo of Carmem S Pfeifer, DDS, PhD

Carmem S Pfeifer DDS, PhD

  • (503) 494-3288

    Portland Campus

    • Associate Professor of Restorative Dentistry School of Dentistry

Dr. Carmem Pfeifer is an Associate Professor in the Department of Restorative Dentistry, Division of Biomaterials and Biomechanics at OHSU School of Dentistry. Dr. Pfeifer teaches Dental Materials and serves as an instructor in several Restorative Dentistry pre-clinical disciplines. She also serves as advisor to graduate theses in the School of Dentistry, Department of Pediatric Dentistry. Dr. Pfeifer obtained her DDS (2001) and PhD (2007) from the University of São Paulo, Brazil. She was a post-doc fellow (2008-2011) at the University of Colorado, School of Dentistry and Chemical and Biological Engineering (Aurora/Boulder). Dr. Pfeifer has published close to 60 research articles in the field of Dental Materials Sciences and serves as the reviewer for several journals in dentistry, polymer science and biomaterials, as well as for the National Institute of Dental and Craniofacial Research at NIH. Her research focuses on the development of innovative polymeric materials for restorative dentistry, as well as on the development of analytical tools to characterize polymer properties evolution in real-time. Recently, she has received the inventor of the year award from OHSU. Her research and career development has been successfully funded by the Oregon Medical Research Foundation, National Science Foundation and National Institutes of Dental and Craniofacial Research. Dr. Pfeifer is originally from Brazil and speaks Portuguese. She really enjoys living in the Pacific Northwest with her husband, twin sons, and two dogs.

Areas of interest

  • Polymeric dental and biomedical materials


  • D.D.S., University of São Paulo Brazil 2001
  • Ph.D., University of São Paulo Brazil 2007

Honors and awards

  • TTBD Inventor of the year award, 2015

Memberships and associations

  • Academy of Dental Materials
  • International Association for Dental Research, Dental Materials Group
  • American Chemical Society, Polymers Division
  • Sigma Xi – The Scientific Research Society
  • International Association for Dental Research, Brazilian Division
  • American Association for Dental Re search (AADR), Portland division – officer (treasurer – since 2011)


  • "Thio-urethanes improve properties of dual-cured composite cements" Journal of Dental Research December 25 2014
  • "Effect of irradiance and light source on contraction stress, degree of conversion and push-out bond strength of composite restoratives" American Journal of Dentistry June 2009
  • "Curing efficiency of dental resin composites formulated with camphorquinone or trimethylbenzoyl-diphenyl-phosphine oxide" Dental Materials April 2012
  • "Modulated photoactivation methods" Journal of Dentistry April 2007
  • "Cytotoxicity of resin composites containing bioactive glass fillers" Dental Materials February 1 2015
  • "Photoinitiator content in restorative composites" American Journal of Dentistry August 2009
  • "Influence of photoinitiator type on the rate of polymerization, degree of conversion, hardness and yellowing of dental resin composites" Dental Materials September 2008
  • "Contraction stress determinants in dimethacrylate composites" Journal of Dental Research April 2008
  • "Sorption, solubility, shrinkage and mechanical properties of "low-shrinkage" commercial resin composites" Dental Materials April 2013
  • "Pulse-delay curing" Operative Dentistry September 2006
  • "Contraction stress and physical properties development of a resin-based composite irradiated using modulated curing methods at two C-factor levels" Dental Materials March 2008
  • "Factors affecting photopolymerization stress in dental composites" Journal of Dental Research November 2008
  • "Influence of matrix composition on polymerization stress development of experimental composites" Dental Materials July 2010
  • "Influence of BisGMA, TEGDMA, and BisEMA contents on viscosity, conversion, and flexural strength of experimental resins and composites" European Journal of Oral Sciences August 2009
  • "Influence of cavity dimensions, insertion technique and adhesive system on microleakage of Class V restorations" Journal of the American Dental Association February 2006
  • "Mapping camphorquinone consumption, conversion and mechanical properties in methacrylates with systematically varied CQ/amine compositions" Dental Materials November 1 2014
  • "Thio-urethane oligomers improve the properties of light-cured resin cements" Dental Materials May 1 2015
  • "Control of polymerization shrinkage and stress in nanogel-modified monomer and composite materials" Dental Materials June 2011
  • "Influence of photoactivation protocol and light guide distance on conversion and microleakage of composite restorations" Operative Dentistry July 2009
  • "A new approach to network heterogeneity" Polymer September 28 2012
  • "Simple optical method for measuring free shrinkage" Dental Materials November 1 2015
  • "Improved dental adhesive formulations based on reactive nanogel additives" Journal of Dental Research February 2012
  • "Elastic modulus of posts and the risk of root fracture" Dental Traumatology August 2009
  • "A urethane-based multimethacrylate mixture and its use in dental composites with combined high-performance properties" Dental Materials February 2014
  • "Can fiber posts increase root stresses and reduce fracture?" Journal of Dental Research June 2010
  • "Repair bond strength in aged methacrylate- and silorane-based composites." Journal of Adhesive Dentistry October 2013
  • "Influence of photoinitiator system and nanofiller size on the optical properties and cure efficiency of model composites" Dental Materials  2014
  • "Influence of the base and diluent monomer on network characteristics and mechanical properties of neat resin and composite materials" Odontology / the Society of the Nippon Dental University April 12 2014
  • "Tailoring heterogeneous polymer networks through polymerization-induced phase separation" Journal of Polymer Science, Part A: Polymer Chemistry July 1 2014
  • "Compatibility of dental adhesives and dual-cure cements" American Journal of Dentistry August 2003

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