1. Division
of Operative Dentistry, Department of General Dentistry, School of
Dentistry, University of Maryland Baltimore, Baltimore, Maryland 21201, United States
2. Department
of Mechanical Engineering, Whiting School of Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
3. Biomaterials
and Tissue Engineering Division, Department of Endodontics, Prosthodontics
and Periodontics, School of Dentistry, University of Maryland Baltimore, Baltimore, Maryland 21201, United States
4. Department of Materials Science & Engineering, College of Engineering, University of Washington, Seattle, Washington 98195, United States