T. Peter Tsay
(312) 413-4132
College of Dentistry
801 S. Paulina Street
  • T. Peter
  • Tsay
  • DDS, MS, PhD
  • Professor of Orthodontics

Biographic Summary

Dr. T. Peter Tsay, DDS, MS, PhD, Professor of Orthodontics at the College of Dentistry and Graduate College is a native of Taiwan. He obtained his dental degree in Taiwan in 1974, Master of Science and Orthodontic Certificate from Marquette University in 1980, Doctor of Philosophy in Oral Biology from Northwestern University in 1984, and Doctor of Dental Surgery from Case Western Reserve University in 1985. Dr. Tsay has extensive academic and orthodontic practice experiences. He was Clinical Director, Program Director and Vice Chairman of Orthodontic Department at Case Western Reserve University. In 1996 Dr. Tsay obtained the position as the Head and Program Director of Orthodontics at the Dental School of Northwestern University. After closure of the Dental School, Dr. Tsay engaged in full-time private practice of orthodontics for over 10 years. He assumed the position of Professor of Orthodontics at UIC in 2010. Dr. Tsay has lectured extensively both here and abroad. Most recently he was invited as a keynote speaker at 14th Annual Meeting of the Chinese Orthodontic Society.  Dr. Tsay is also a Visiting Professor at Nanjing Medical University in China. He serves as an Outside Examiner for the dissertation of doctorate candidates every year at Nanjing Medical University.

Scholarly Interests

Orthognathic Surgery, Digital Orthodontics, and Object-Based Orthodontic Technics.


Tsay, T.: A study of the reliability of two methods used for describing the occlusal plane and a comparison of these methods in evaluating changes incurred during orthodontic treatment., M.S. Thesis, Marquette University, Milwaukee, Wisconsin, 1980.

Tsay, T. and Veis, A.: Preparation and analysis of antibodies to dentine phosphophoryn., J. Dent. Res. 62SI:243, 1983.

Veis, A., Tsay, T., and Kanwar, Y.: An immunological study of the localization of dentine phosphophoryns in the teeth. In Les Colloques de I'INSERM, Tooth Morphogenesis and Differentiation, INSERM, Vol.  125, pp 223  232, 1984.             

Tsay, T.: The localization of the phosphophoryn components in rat incisor: an immunochemical study of the secretory pathway., Ph.D. Dissertation, Northwestern University, Evanston, Illinois, 1984.             

Tsay, T. and Veis, A.: Immunohistochemical localization of phosphophoryn in rat incisor., J. Dent. Res., 63SI: 322, 1984.             

Tsay, T. and Veis, A.: Preparation, detection, and characterization of an antibody to rat phosphophoryn., Biochem., 24:6363 6369, 1985.           

Rahima, M., Tsay, T., Anduricio, M., and Veis, A.: Localization of phosphophoryn in rat incisor dentin using immunocytochemical techniques., J. Histochem. Cytochem. 36:153 157, 1988.

Oyen, O. J. and Tsay, T.: Facial asymmetry and functional symmetry. In: Garino, G. B. (Ed), Proceedings of the 10th Congress of Italian Society of Orthodontists. pp11 37, 1989.             

Oyen, O.J., Tsay, T., and Rangel, R.D.: Asimetria facial y simetria funcional. Practica Odontologica, 11:11 17, 1990.             

Oyen, O. J. and Tsay, T.: A Biomechanical analysis of craniofacial form and bite force. Am. J. Orthod. Dentofac. Orthop. 99:298 309, 1991.        

Oyen, O. J., Tsay, T., and Riachi, R.: Chapter 55, In vivo testing of bite force and bone strain in the African green monkey. In: Fundamentals of Bone Growth: Methodology and Applications, A.  R.  Dixon and B. G. Sarnat (Eds), CRC Press, pp 523 536, 1991.             

Tsay, T., Goodrich, G. R., and Oyen, O. J.: The effects of irradiation on osteoclast during orthodontic tooth movement. J. Dent. Res. 70SI:533, 1991.

Tsay, T. and Oyen, O. J: A study of the reproducibility of two methods used for describing the occlusal plane. Proc. Natl. Sci. Coun. ROC., 16:126 133, 1992.

Udomsiri, I., Oyen, O., and Tsay, T.: Relation between muscle size and jaw function in African green monkey. J. Dent. Res., 72SI:194, 1993.

Chen, M. H., Tsay, T. P., Marty, J. J., and Oyen, O. J.: The effect of various irradiation regimens on bone marrow cellularity. J. Dent. Res. 73SI:149, 1994. 

Tsay, T. P., Chen, M. H., Hahn, S. S., and Oyen, O. J.: The effect of whole body irradiation on alveolar osteoclast. J. Dent. Res. 73SI:149, 1994.

Tsay, T. P., Chen, M. H., Oyen, O. J., Hahn, S. S., and Marty, J. J.: The effect of radioisotope irradiation on bone marrow cellularity and alveolar osteoclasts. Proc. Natl. Sci. Coun. ROC, 19:185-195

Tsay, T. P., Aceves, M. E. G., and Oyen, O. J.: Validity of using  profile evaluation in orthodontic treatment. J. Dent. Res. 74SI:345, 1996. 

Tsay, T.P., Dempsey, M.A., Oyen, O.J.: The effects of orthognathic surgery on the appearance and age of female patients. J. Dent.  Res. 77SI(B):899. 1998.

Oyen, O.J., Dentino, A.R., and Tsay, T.P.: An evaluation of relationships between jaw function and body size: Limits on oral models for predicting osteoporosis. J. Dent. Res. 77SI(B):1014,  1998.

Tsay, T. P., Chen, M. H., Oyen, O. J.: Osteoclastic activation and recruitment after application of orthodontic force. Am. J. Orthod.  Dentofac. Orthop. 115:323-330, 1999.

Kravitz, N.D., Kusnoto, B., Tsay, T.P., Hohlyt, W.F.: The use of temporary anchorage devices for molar intrusion. J. Am. Dent. Assn. 138:56-64, 2007.

Kravitz, N.D., Kusnoto, B., Tsay, T.P., Hohlyt, W.F.: Intrusion of overerupted upper first molar using two orthodontic miniscrews. Angle Orthodontists 77:915-922, 2007.

Masoud, A. Tsay, T.P., BeGole, E., Bedran-Russo, A.K.: Force decay evaluation of thermoplastic and thermoset elastomeric chains – a mechanical design comparison. The Angle Orthodontists, 84:1026-1033, 2014.