Fig. 1From: Cellular response of human apical papilla cells to calcium hydroxide and tricalcium silicate-based cementsHistologic characteristics of immature premolar teeth. a Histological views of the longitudinal section of teeth (× 1.25 and × 7.5). b Chromogenic stain for STRO-1 in apical papilla. c Hematoxylin and eosin of extracted apical papilla (× 20) n = 5. scale bar 200umBack to article page