Michael D. Rohrer, DDS, MS

Professor, Department of Diagnostic and Biological Sciences

Michael D. Rohrer

Contact Info


Office Phone 612-624-2463

Lab Phone 612-626-3076

Office Address:
16-108A Moos Tower
515 Delaware St. SE
Minneapolis, MN 55455

DDS, University of Michigan (Dentistry), 1970

MS, University of Michigan (Oral Pathology), 1978

BS, University of Michigan (Zoology), 1966


Dr. Rohrer is Professor and Director of the Hard Tissue Research Laboratory, School of Dentistry, University of Minnesota.

Dr. Rohrer has authored/co-authored over 85 publications, book chapters and instructional programs in the area of oral and maxillofacial pathology. Since spending his first sabbatical leave in 1986 with Prof. Dr. Dr. Karl Donath at the University of Hamburg, Germany, Dr. Rohrer's research interests have primarily been in the histologic and histomorphometric evaluation of bone, bone implants, bone grafting materials, and bone enhancing strategies. He brought the Donath/EXAKT technique of non-decalcified histotechnology to the Western Hemisphere in 1987.

Dr. Rohrer is a sought-after lecturer in the area of clinical oral and maxillofacial pathology. He received the Most Outstanding Full-Time Faculty Award presented by the graduating class of the University of Oklahoma College of Dentistry for the most outstanding classroom instructor of their four years in dental school in 1983, 1985, 1986, and 1997. In 3 of his 4 years at the University of Minnesota he has received the Instructor of the Year award presented by Dental Classes of 2003, 2004, and 2006.

Dr. Rohrer was named a Presidential Professor at the University of Oklahoma in 1997, having served on the faculty there for 22 years before coming to the University of Minnesota. At the University of Oklahoma Dr. Rohrer served as Associate Dean for Academic Affairs and Associate Dean for Research for a total of 14 years. At the University of Minnesota he has served as Interim Associate Dean for Academic Affairs. He is currently the Chair of the Promotion and Tenure Committee of the School of Dentistry.

Dr. Rohrer has been active in his specialty. He was elected president of the American Board of Oral and Maxillofacial Pathology for 2003-2004, completing seven years on that certifying board. In 2004 he was elected Vice President of the American Academy of Oral and Maxillofacial Pathology and will become president in 2006. Dr. Rohrer has an active practice of surgical and clinical oral and maxillofacial pathology.

Awards & Recognition

  • Instructor of the Year Presented by Dental Classes of 2003, 2004, and 2006 University of Minnesota, 2001, 2002, 2004
  • Most Outstanding Full-Time Faculty Award. Presented by the graduating class of the University of Oklahoma College of Dentistry, 1983, 1985, 1986, 1997
  • Named as Consulting Pathologist, American Board of Oral and Maxillofacial Surgery, 2000
  • Induction as Fellow, American College of Dentists, 1999
  • The American Orthopaedic Society for Sports Medicine Excellence in Research Award, 1998
  • University of Oklahoma Presidential Professor, 1997
  • University of Oklahoma Volunteer Spirit Award., 1994
  • University of Oklahoma Associates Distinguished Lectureship, 1988
  • Pfizer Award for Innovation. With Dr. Ronald A. Bulard, 1987
  • Benjamin Franklin Award, 1986
  • Sigma Xi - The Scientific Research Society - Elected to Full Membership, 1983
  • Omicron Kappa Upsilon, National Dental Honorary, 1970
  • Phi Kappa Phi, National Scholastic Honorary Society, 1970


Research Summary/Interests

Bone/dental implant integration; Evaluation of bone grafting materials; Evaluation of bone growth enhancing strategies; Oral mucosal diseases; Precancerous mucosal conditions


  • Froum, S., Cho, S-C, Elian, N., Rosenberg, E., Rohrer, M.D., and Tarnow, D. Extraction Sockets and implantation of hydroxyapatites with membrane barriers: a histologic study. Implant Dent 2004;13:153-164
  • Wikesjö, Ulf M. E., Qahash, Mohammed, Thomson, Robert C., Cook, Alonzo D., Rohrer, Michael D., Wozney, John M. & Hardwick, W. Ross. rhBMP-2 significantly enhances guided bone regeneration. Clinical Oral Implants Research15 (2), 194-204, March 2004
  • Proussaefs, P., Lozada, J., Kim, J., and Rohrer, M.D. Repair of the perforated sinus membrane with a resorbable collagen membrane: a human study. Int J Oral Maxillofac Implants 2004;19:413-420
  • Artzi, Z., Weinreb,M., Givol, N., Rohrer, M.D., Nemcovsky, C.E., Prasad, H.S., and Tal, H. Biomaterial Resorption Rate and Healing Site Morphology of Inorganic Bovine Bone and b-Tricalcium Phosphate in the Canine. A 24-month Longitudinal Histologic Study and Morphometric Analysis. Int J Oral Maxillofac Implants 2004;19:357-368
  • Artzi, Z., Givol, N., Rohrer, M., Nemcovsky, C., Prasad, H., and Tal, H. Qualitative and quantitative expression of bonine bone mineral in experimental bone defects. Part 1: description of a dog model and histological observations. J Periodontology 2003 Aug:74(8):1143-52
  • Artzi, Z., Givol, N., Rohrer, M., Nemcovsky, C., Prasad, H., and Tal, H. Qualitative and quantitative expression of bonine bone mineral in experimental bone defects. Part 2: morphometric analysis. J Periodontology 2003 Aug:74(8):1153-60
  • Hahn, J., Rohrer, M.D., and Tofe, A.J. Clinical, radiographic, histologic, and histomorphometric comparison of PepGen P-15 particulate and PepGen P-15 flow in extraction sockets: a same-mouth case study. Implant Dentistry2003;12(2):170-4
  • Proussaefs, P, Lozada, J., Kleinman, A., Rohrer, M.D., and McMillan, P.J. The use of titanium mesh in conjunction wit autogenous bone graft and inorganic bovine bone mineral (Bio-Oss) for localized alveolar ridge augmentation; a human study. Int J Periodontics Restorative dent 2003;23:185-195
  • Wikesjö UME, Qahash M, Thomson RC, Cook AD, Rohrer MD, Wozney JM, Hardwick WR. Space-providing expanded polytetrafluoroethylene devices define alveolar augmentation at dental implants induced by recombinant human bone morphogenetic protein-2. Clinical Implant Dentistry and Related Research 2003; 5:112-123.
  • Ko, C.C., Douglas, W.H., DeLong, R., Rohrer, M.D., Swift, J.Q., Hodges, J.S., An, K-N, and Ritman, E.L. Effects of implant healing time on cervical bone loss of a controlled-load dental implant. J Dent Res 82(8):585-591, 2003
  • London, R.M. Roberts, F.A., Baker, D.A., Rohrer, M.D., and O'Neal, R.B. Histologic comparison of a thermal dual-etched implant surface to machined, TPS, and HA surfaces: Bone contact in vivo in rabbits. Int J Oral Maxillofac Implants, 2002; 17:369-376
  • Proussaefs, P, Lozada, J., Kleinman, A., and Rohrer, M.D. The use of intraorally harvested autogenous block grafts for vertical alveolar ridge augmentation. A human study. Int J Oral Maxillofac Implants 17(2):238-248, 2002
  • Froum, S., Rohrer, M.D., Rosenberg, E., Cho, S.C., and Tarnow, D. Histological comparison of healing extraction sockets implanted with either bioactive glass or decalcified freeze-dried bone allograft. J Periodontol 2002 Jan. 73 (1) 94-102
  • Goradia, V.K., Rochat, M.C., Grana, W.A., Rohrer, M.D., and Prasad, H.S. Tendon-to-bone healing of a semitendinosus tendon autograft used for ACL reconstruction in a sheep model. Am J Knee Surg. 2000;13:143-151
  • Tatakis, D.N., Koh, A., Jin, L., Wozney, J.M., Rohrer, M.D., and Wikesjö, U.M.E. Peri-implant bone regeneration using recombinant human bone morphogenetic protein-2 in a canine model: a dose-response study. J Periodont Res 2002; 37:93-100
  • Nadon, N.L., Doersen, C-J., Lade, D.A., Medina, K.,.Thompson, L., Rohrer, M.D., and Gimble. Multiple cellular phenotypes in an insertional mutation in mouse affecting bone development. Calcified Tissue International, 2000, 67:449-454
  • Tarnow, D.P., Wallace, S.S., Froum, S., Rohrer, M.D. Histologic and clinical comparison of bilateral sinus floor elevations with and without barrier membrane placement in 12 patients: part 3 of an ongoing prospective study. Int J Perio and Rest Dent 2000, 20(2):117-125
  • Wu, X, Peters, J.M., Gonzalez, F.J., Prasad, H.S., Rohrer, M.D., Gimble, J. M. The frequency of stromal lineage colony forming units in the bone marrow of peroxisome proliferator-activated receptor-a-null mice. BONE, 26:1:21-26, January, 2000
  • Rohrer, M.D., Sobszak, R., Prasad, H.S. and Morris, H.F. Postmortem Histologic Evaluation Of Mandibular Titanium And Maxillary Hydroxyapatite-Coated Implants In Situ For 85 And 38 Months. Int J Oral Maxillofac Implants 14:579-586, 1999
  • Barker, B.F., Rohrer, M.D., and eighteen other authors. Oral mucosal melanomas. The WESTOP Banff workshop proceedings. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 83:672-679, 1997
  • Dominici, J.T., Olson, J., Rohrer, M.D., and Morris, H. Post-mortem histologic evaluation of hydroxyapatite-coated cylinder and titanium alloy basket implants in situ for 37 months in the posterior mandible. Implant Dentistry 6:215-222, 1997
  • Sigurdsson, T.J., Fu, E., Tatakis, D.N., Rohrer, M.D., and Wikesjö, U.M.E. Bone morphogenetic protein-2 enhances peri-implant bone regeneration and osseointegration. Clin Oral Impl Res 8:367-374, 1997
  • Rayan GM, Murray D, Chung KW, Rohrer MD: The extensor retinacular system at the metacarpophalangeal joint: anatomical and histological study. Journal of Hand Surgery (British and European Volume)22B:5:585-590, 1997
  • Hough, JVD, Wilson, N, Dormer, KJ, Rohrer, MD: The Audiant Bone Conductor: Update of Patient Results in North America. American Journal of Otology 15(2)189-197, March 1994.
  • Collier, M.A., Haugland, L.M., Bellamy, J., Johnson, L.L., Rohrer, M.D., et al: Effects of Holmium: YAG Laser on Equine Articular Cartilage and Subchondral Bone Adjacent to Traumatic Lesions: A Histopathological Assessment. Journal of Arthroscopic and Related Surgery 9(5)536-545, 1993.
  • Rohrer, M.D. and Schubert, C.C. The cutting-grinding technique for histologic preparation of undecalcified bone and bone-anchored implants: improvements in instrumentation and procedures. Oral Surgery Oral Medicine Oral Pathology. 74:73-78, 1992.
  • Donath, K., Rohrer, M.D., Hoermann, K. Mobile and Immobile Hydroxylapatite Integration and Resorption and Its Influence on Bone. Oral Implantology, 13(1):120-127, 1987.
  • Donath, K., Rohrer, M.D., and Beck-Mannagetta, J. Histological Evaluation of a Mandibular Cross Section One Year After Augmentation with Hydroxylapatite Particles. Oral Surgery Oral Medicine Oral Pathology, 63:651-655, June, 1987.
  • Rohrer, M.D., Terry, M.A., Bulard, M.A., Graves, D.C. and Taylor, E.T. Microwave Sterilization of Hydrophilic Contact Lenses. American Journal of Ophthalmology, 101:49-57, 1986.
  • Rohrer, M.D. and Bulard, R.A. Microwave Sterilization. J Am Dent Assoc, 110:194-198, 1985.
  • Rohrer, M.D. and Bulard, R. A. Sterilization by Microwaves. Oklahoma Dental Association Journal, 75:29-31, 1985
  • McCallum, R.E., Rohrer, M.D., Urbaschek, R. and Urbaschek, B. Histopathology of Mixed Anaerobic Intra-abdominal Infection in Mice. Klinishe Wochenschrift, 60:702-704, 1982.
  • Rohrer, M.D., Kircos, L.T., Thrall, J.H., Kim, Y. and Fayos, J.V. Evaluation of Irradiated Mandibles Using Emission Tomography, Bone Scans and Radiography. J Dent Res, 59:2032-2037, 1980.
  • Rohrer, M.D., Kim, Y. and Fayos, J.V. The Effect of Cobalt-60 Irradiation on Monkey Mandibles. Oral Surgery Oral Medicine Oral Pathology, 48:424-440, 1979.


Board Certifications

Diplomate, American Board of Oral and Maxillofacial Pathology