Photo of Hahn, Ellen

Ellen Hahn, DDS, MS, PhD

Clinical Associate Professor

Endodontics

Contact

Building & Room:

302C

Address:

UIC College of Dentistry 801 S. Paulina St., IL 60612

Email:

ehahn@uic.edu

About

Dr. Hahn completed her endodontic specialty training, MS and PhD at the University of Maryland Baltimore. She received her DDS degree from University of Missouri – Kansas City. She has been actively involved in endodontic education and research since graduation - taught in 4 dental institutions in the US and one abroad. Always learning and improving, she was later certified as a biblical counselor in 2014.  One of her favorite quotes is “We make a living by what we get, but we make a life by what we give.” – by Winston Churchill.  She enjoys growing orchids and gardening and watching volleyball games.

Research has always been her passion ranging from pulp biology to clinical research. She is the first author on 17 papers and a member of American Association of Endodontics and a member of the scientific review board of Journal of Endodontics. Her current research interests are three folds: (1) endodontic diagnosis, (2) cleaning and shaping techniques, and (3) educational aids in endodontics.

Selected Publications

  1. Harmon, M.A., Tew, J.G., Best, A.M. and Hahn, CL: Mature dendritic cells in inflamed human pulps beneath deep caries. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 107(5):727-32, 2009. Epub 2009 Feb 6.
  2. Hahn, CL and Liewehr, F.R.: Update on adaptive immune responses of dental pulp. J. Endod. 33(7):773-81, 2007.
  3.  Hahn, CL and Liewehr, F.R.: Innate immune response of dental pulp to caries. J. Endod. 33(6):643-51, 2007.
  4. Hahn, CL., Best, A.M. and Tew, J.G.: Rapid tissue factor induction by oral streptococci and monocyte-IL1beta. J. Dent. Res. 86(3): 255-9, 2007.
  5.  Hahn, CL and Liewehr, F.R.: Relationships between caries bacteria, host responses and clinical signs and symptoms of pulpitis. J. Endod. 33(3):213-9, 2007. Epub 2007 Jan 4.
  6. Krause, T.A., Liewehr, F.R. and Hahn, CL.: The antimicrobial effect of MTAD, sodium hypochlorite, doxycycline, and citric acid on Enterococcus faecalis. J. Endod. 33(1):28-30, 2007. Epub 2006 Oct 27.
  7. Hahn, C.L. and Best, A.M.: The pulpal origin of immunoglobulins in dentin beneath caries: an immunohistochemical study. J. Endod. 32(3):178-82, 2006.
  8. Hahn, C.L., Schenkein, H.A. and Tew, J.G.: Endocarditis-associated oral streptococci promote rapid differentiation of monocytes into mature dendritic cells. Infect. Immun. 73(8):5015-21, 2005.
  9.  Kikuchi, T., Hahn, CL., Tanaka, S., Barbour, S.E, Schenkein, H.A. and Tew, J.G.: Dendritic cells stimulated with Actinobacillus actinomycetemcomitans elicit rapid gamma interferon responses by natural killer cells. Infect. Immun. 72(9):5089-96, 2004.
  10. Hahn, C.L., Best, A.M. and Tew, J.G.: Immune response to Streptococcus mutans tends to polarize toward type-1 while other caries bacteria induced a mixed cytokine profile. J. Endod. 30:333-338, 2004.

11. Hahn, C.L., Best, A.M. and Tew J.G.: Cytokine induction by Streptococcus mutans and pulpal pathogenesis. Infect. Immun. 68:6785-6789, 2000.

12. Schenkein, H.A., Gunsolley, G.J., Best, A.M., Harrison, M.T., Hahn, C.L., Wu. J. and Tew, J. G.: Antiphosphorylcholine antibody levels are elevated in humans with periodontal diseases. Infect. Immun. 67:4814-4818, 1999.

13. Hahn, C.L., Achleithner, C.L.: Software Review for Journal of Dental Education “Cleaning and Shaping Volume I”. J. Dent. Edu. 62 (11), 938-939, 1998.

14. Forte, S.G., Hauser, M.J., Hahn, C.L. and Hartwell, G.R.: Microleakage of super EBA with and without finishing as determined by the fluid filtration method. J. Endod. 24: 799-801, 1998.

15. Hahn, C.L. and Overton, B.: The effects of immunoglobulins on the convective permeability of human dentine, in vitro. Arch. Oral Biol. 42:835-843, 1997.

16. Hahn, C.L., Schenkein, H.A. and Tew, J.G.: Polyclonal B cell activators and in vitro induction of autoantibody reactive with collagen. J. Periodont. Res. 32:608-613, 1997.

17. Barbour, S.E., Nakashima, K., Zhang, J.B., Tangada, S., Hahn, C.L., Schenkein, H.A. and Tew, J.G.: Effects of Tobacco and smoking on the immune system: an environmental factor that modifies host response and has an impact on the periodontium. Crit. Rev. Oral Biol. Med. 8:437-460, 1997.

18. Tew, J.G., Burton, G.F., Helm, S., Wu, J., Qin, D., Hahn, E. and Szakal, A.K.: Murine follicular dendritic cells: accessory activities in vitro. Curr. Top. Microbiol. Immunol. 201:93-104, 1995.

19. Hahn, C.L. and Falkler, W.A., Jr.: Correlation between thermal sensitivity and microorganisms isolated from deep carious dentin. J. Endod. 19:26-30, 1993.

20. Hahn, C.L. and Falkler, W.A., Jr.: Antibodies in normal and diseased pulps reactive with microorganisms isolated from deep caries. J. Endod. 18:28-31, 1992.

 

21. Hahn, C.L., Falkler, W.A., Jr. and Minah, G.E.: Microbiological studies of carious dentine from human teeth with irreversible pulpitis. Arch. Oral Biol. 36:147-153, 1991.

22. Hahn, C.L., Falkler, W.A., Jr. and Siegel, M.A.: A study of T and B cells in pulpal pathosis.  J. Endod. 15:20-26, 1989.

23. Hahn, C.L., Hanford, K: An in vitro model to study the colonization and tubular invasion of Enterococcus faecalis. J. Endod. 47:451-457, 2021.

24. Hahn, C.L., Sherman, J., Hanford, K.: Ageing-related effects of dye penetration in the apical 5 mm mesiobuccal and mesial roots of molars. Aust. Endod. J. 2022.

Education

Bachelor of Dental Sciences – Taipei Medical University, Taipei, Taiwan
Endodontic certificate - University of Maryland Baltimore
MS in oral biology - University of Maryland Baltimore
PhD in oral microbiology - University of Maryland Baltimore
DDS – University of Missouri – Kansas City
MA in biblical counseling – Southern Baptist Theological Seminary