1. Periodontics and Oral Medicine; School of Dentistry; University of Michigan; 1011 North University Avenue Ann Arbor MI 48109-1078 USA
2. Biointerfaces Institute; Department of Materials Science and Engineering; B26-115S NCRC; University of Michigan; 2800 Plymouth Road Ann Arbor MI 48109-2800 USA
3. Department of Periodontology; Institute of Odontology; Medicinaregatan 12F; 6th Floor; University of Gothenburg; SE-405 30 Gothenburg Sweden
4. Biointerfaces Institute; Department of Chemical Engineering; Materials Science and Engineering; Biomedical Engineering; Macromolecular Science and Engineering; B10-A175 NCRC; University of Michigan; 2800 Plymouth Road Ann Arbor MI 48109-2800 USA
5. Department of Periodontics and Oral Medicine and Department of Biomedical Engineering; University of Michigan; 1011 North University Avenue Ann Arbor MI 48109-1078 USA