Dr. Sfeir also has secondary appointments within the departments of Biomedical Engineering and Materials Science and Engineering at Carnegie Mellon University. He received a Doctor of Dental Surgery (DDS) degree from the Université Louis Pasteur - Strasbourg France in 1990. He also has a degree in Periodontology and holds a Ph.D. in Molecular Biology from Northwestern University. Dr. Sfeir is actively involved in research focusing on two major topics: (1) Role of extracellular matrix in tissue engineering and biomineralization (2) The use of bioceramic nanoparticles in non-viral DNA gene delivery.