1. Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA
2. Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-050, SP, Brazil
3. Department of Morphology and Pediatric Dentistry, School of Dentistry, São Paulo State University (UNESP), Araraquara 14801-385, SP, Brazil
4. Departments of Chemistry, Mechanical Engineering and Material Science, Orthopaedic Surgery, Duke University, Durham, NC 27708, USA
5. Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI 48109, USA