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Associate Dean for Academic Affairs and Graduate Programs and Professor This email address is being protected from spambots. You need JavaScript enabled to view it.
Hoehn 101

(205) 934-8524

Research and Teaching Interests: Higher Education Assessment, Engineering Education, including Assessment and Accreditation; Dental Materials; Processing/Microstructure/Mechanical Property relationships

Office Hours: By appointment


  • B.S.Met.E., Metallurgical Engineering, Michigan Technological University 1983 (High Honor)
  • M.S. Met.E., Metallurgical Engineering, Michigan Technological University 1985
  • Ph.D., Metallurgical Engineering, Michigan Technological University 1988

I came to UAB in 1990 after a National Research Council Post-Doctoral Associateship at the National Institute of Standards and Technology, Metallurgy Division (1988-1990). I joined in 1990 as an assistant professor and was promoted to associate professor (1996) and full professor (2011). I taught taught a wide range undergraduate and graduate courses and received the 1999 Presidential Award for Excellence in Teaching for School of Engineering and the 2013 Ellen Gregg Ingalls/UAB National Alumni Society Award for Lifetime Achievement in Teaching, which is the highest teaching award at UAB. I have served as the undergraduate (materials engineering) and graduate (materials science and materials engineering) program director. I have mentored/co-mentored 12 doctoral students, five of whom are university faculty. My research has involved composite materials, metals, and dental materials, with over 80 total publications.

Assessment and accreditation at department, school, and university level have been a major focus of my career. I was the primary author of four Engineering Accreditation Commission of ABET (EAC/ABET) self-studies (three in Materials Engineering and one in Mechanical Engineering) and been the primary university contact for one visit. I have served as a program evaluator for five EAC/ABET site visits and four as chair or co-chair.

As Associate Provost for Assessment and Accreditation, I am Southern Association of Colleges and Schools Commission on Colleges (SACSCOC) Liaison, including the Quality Enhancement Plan. Additional responsibilities include assessment and program improvement as well as academic and faculty issues in the provost’s office.

  • Research Interests

    My current research focuses on ceramic materials for dental applications, including zirconia and porcelain. Topics include effects of roughness and roughing process on bond strength, correlation of materials strength to the strength of a model tooth system, phase transformations in the oral environment, and CAD/CAM processing.

  • Select Publications
    • Tariq F. Alghazzawi, Jack Lemons, Perng-Ru Liu, Milton E. Essig, and Gregg M. Janowski: "The Failure Load of CAD-CAM Generated Zirconia and Glass-Ceramic Laminate Veneers with Different Preparation Designs.” Journal of Prosthetic Dentistry Vol. 108, Issue 6, December 2012, pp. 38, 6-393. doi: 10.1016/S0022-3913(12)60198-X, PMID: 23217471.
    • Reginna E. Scarber, Amanee D. Salaam, Vinoy Thomas, Gregg M. Janowski, Derrick Dean: “Direct Sol–Gel Electrospinning of Fibrous Bioglass Scaffolds for Bone Tissue Engineering,” Journal of Biomaterials and Tissue Engineering, Vol. 3, No. 4, Aug. 2013, pp. 440-447(8), DOI: http://dx.doi.org/10.1166/jbt.2013.1101.
    • T.J. Lucas, N.C. Lawson, G.M. Janowski, and J.O. Burgess: “Phase transformation of dental zirconia following artificial aging,” Journal of Biomedical Materials Research - Part B Applied Biomaterials 103(7):1519-1523 01 Jan 2015, DOI: 10.1002/jbm.b.33334.
    • T.F. Alghazzawi, G.M. Janowski: “Correlation of flexural strength of coupons versus strength of crowns fabricated with different zirconia materials with and without aging” J Am Dent Assoc, 146(12), 904-912, 31 Dec 2015, DOI:10.1016/j.adaj.2015.06.006.
    • Tariq F Alghazzawi, Khalid H Al-Samadani, Jack Lemons, Perng-Ru Liu, Milton E Essig, Alfred A Bartolucci, Gregg M Janowski: "Effect of imaging powder and CAD/CAM stone types on the marginal gap of zirconia crowns," The Journal of the American Dental Association, Vol. 146, Issue 2, Feb. 2015, pp. 111–120, DOI:10.1016/j.adaj.2014.10.006. PMID: 25637209.
    • T.F. Alghazzawi, G.M. Janowski: “Evaluation of zirconia-porcelain interface using X-ray diffraction,” International Journal Oral Science, Vol. 7, No. 3, pp 187-195, 1 Sept 2015, DOI 10.1038/ijos.2015.20, PMID: 26208038.
    • T.J. Lucas, N.C. Lawson, G.M. Janowski, and J.O. Burgess: "Phase transformation of dental zirconia following artificial aging," Journal of Biomedical Materials Research: Part B - Applied Biomaterials, Vol. 103, Issue 7, 1-Oct-2015, pp. 1519-1523, DOI: 10.1002/jbm.b.33334.
    • T.J. Lucas, N.C. Lawson, G.M. Janowski, and J.O. Burgess: “Effect of grain size on the monoclinic transformation, hardness, roughness, and modulus of aged partially stabilized zirconia,” Dental Materials 31(12):1487-1492 Dec 2015, DOI: http://dx.doi.org/10.1016/j.dental.2015.09.014.
    • Tariq F. Alghazzawi and Gregg M. Janowski: “Effect of Liner and Porcelain Application on Zirconia Surface Structure and Composition,” International Journal of Oral Science, 8(3):164-171 29 Sep 2016, DOI:10.1038/ijos.2016.20.
  • Academic Distinctions & Professional Societies
    • ASM International
    • TMS of American Institute of Mining and Metallurgical and Petroleum Engineers
    • Tau Beta Pi
    • Alpha Sigma Mu
    • American Society for Engineering Education