Stem cell-based biological tooth repair and regeneration

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Stem cell-based biological tooth repair and regeneration Ana Angelova Volponi, Yvonne Pang, Paul T. Sharpe Trends in Cell Biology Volume 20, Issue 12, Pages 715-722 (December 2010) DOI: 10.1016/j.tcb.2010.09.012 Copyright © 2010 Elsevier Ltd Terms and Conditions

Figure 1 Tooth formation in vitro from combinations of mouse epithelial and mesenchymal cells. The epithelium (red arrow) and mesenchyme (black arrow) are separated from pre-bud stage tooth primordia,and cells dissociated in single cell populations. (a) The cells are recombined (as shown in this figure) and grown in vitro for 6 days. (b) Gross appearance after 9 days in culture with higher magnification of a tooth primordium. (c) Sections of tooth primordia from (a), showing development to the bell stage. Trends in Cell Biology 2010 20, 715-722DOI: (10.1016/j.tcb.2010.09.012) Copyright © 2010 Elsevier Ltd Terms and Conditions

Figure 2 Diagrammatic representation of the generation of biological replacement teeth. Suitable sources of epithelial and mesenchymal cells are expanded in culture to generate sufficient cells. The two cell populations are combined to bring the epithelial and mesenchymal cells into direct contact, mimicking the in vivo arrangement. Interaction between these cell types leads to formation of an early stage tooth primordium, equivalent to a tooth bud or cap, around which the mesenchyme cells condense (dark blue dots) (see also Box 1). The tooth primordium is surgically transplanted into the mouth and left to develop. Trends in Cell Biology 2010 20, 715-722DOI: (10.1016/j.tcb.2010.09.012) Copyright © 2010 Elsevier Ltd Terms and Conditions

Figure I Diagrammatic representation of tooth development. Trends in Cell Biology 2010 20, 715-722DOI: (10.1016/j.tcb.2010.09.012) Copyright © 2010 Elsevier Ltd Terms and Conditions

Figure II Photograph and diagram of a human third molar tooth following extraction. A hemisected tooth showing the internal tissues is shown on the right. Because the tooth was in the process of erupting, root growth is incomplete, and the apical papilla is visible. A diagrammatic representation of this tooth is shown on the left. Trends in Cell Biology 2010 20, 715-722DOI: (10.1016/j.tcb.2010.09.012) Copyright © 2010 Elsevier Ltd Terms and Conditions