CLSM observation of human bone marrow osteoblastic cells cultured on NCD films at days 7 (a) and 21 (b) (calcein, phalloidin and propidium iodide labelling). Reprinted with permission from Journal of Biomedical Materials Research, Nanocrystalline diamond: In vitro biocompatibility assessment by MG 63 and human bone marrow cells cultures, 87A, 2008, Amaral, M., Dias, A G., Gomes, P. S., Lopes, M. A, Silva, R. F. and Santos, J. D. Copyright © 2008 Wiley Periodicals, Inc.