Figure 4.

SEM analysis of microparticles made from gelatin, with (B, D, F, H, J, L) and without (A, C, E, G, I, K) amelogenin (AMG). The particles were incubated at pH 7 (A-F) or at pH 4 (G-L) before preparation for SEM. The presence of amelogenin affected the surface structure of the particles at pH 7 and small pores were observed in the amelogenin containing particles (panel F), but not in the control particles without amelogenin (panel E). A difference in the structure between amelogenin and control particles was also observed at pH 4 (panel G-L), but no pores seemed to form at acidic pH.